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Pioneer Money Market Trust

04/25/2024 | Press release | Distributed by Public on 04/25/2024 11:49

Post-Effective Amendment to Registration Statement by Investment Company - Form 485BPOS

PIONEER MONEY MARKET TRUST

File Nos. 033-13179
811-05099

As filed with the Securities and Exchange Commission on April 25, 2024

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

☒

Pre-Effective Amendment No. ___

☐

Post-Effective Amendment No. 64

☒

and/or

REGISTRATION STATEMENT UNDER THE

INVESTMENT COMPANY ACT OF 1940

☒

Amendment No. 65

☒

(Check appropriate box or boxes)

PIONEER MONEY MARKET TRUST

(Exact Name of Registrant as Specified in Charter)

60 State Street, Boston, Massachusetts 02109

(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, including Area Code: (617) 742-7825

Christopher J. Kelley, Amundi Asset Management US, Inc.,
60 State Street, Boston, Massachusetts 02109

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box):

☐

immediately upon filing pursuant to paragraph (b)

☒

on May 1, 2024pursuant to paragraph (b)

☐

60 days after filing pursuant to paragraph (a)(1)

☐

on [date] pursuant to paragraph (a)(1)

☐

75 days after filing pursuant to paragraph (a)(2)

☐

on [date] pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

☐

This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Pioneer U.S. Government Money Market Fund

Prospectus | May 1, 2024

Class A Shares	Class R Shares	Class Y Shares
PMTXX	PRXXX	PRYXX

Contents

Fund summary	1
More on the fund's investment objectives and strategies	10
More on the risks of investing in the fund	14
Management	23
Pricing of shares	25
Choosing a class of shares	26
Distribution and service arrangements	28
Sales charges	30
Buying, exchanging and selling shares	32
Account options	43
Shareholder services and policies	47
Dividends, capital gains and taxes	53
Financial highlights	55

Neither the Securities and Exchange Commission nor any state securities agency has approved or disapproved the fund's shares or determined whether this prospectus is accurate or complete. Any representation to the contrary is a crime.

An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Contact your investment professional to discuss how the fund may fit into your portfolio.

Fund summary

Investment objectives

Preservation of capital, liquidity, and current income.

Fees and expenses of the fund

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Shareowner fees(fees paid directly from your investment)

	Class A	Class R	Class Y
Maximum sales charge (load) when you buy shares (as a percentage of offering price)	None	None	None
Maximum deferred sales charge (load) (as a percentage of offering price or the amount you receive when you sell shares, whichever is less)	None	None	None

Annual fund operating expenses(expenses that you pay each year as a percentage of the value of your investment)

	Class A	Class R	Class Y
Management Fees	0.35%	0.35%	0.35%
Distribution and Service (12b-1) Fees	0.15%	0.50%	0.00%
Other Expenses	0.20%	0.21%	0.15%
Total Annual Fund Operating Expenses	0.70%	1.06%	0.50%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods shown and then, except as indicated, redeem all of your shares at the end of those periods. It also assumes that (a) your investment has a 5% return each year and (b) the fund's total annual operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	Number of years you own your shares (with or without redemption)
	1	3	5	10
Class A	$72	$224	$390	$871
Class R	108	337	585	1,294
Class Y	51	160	280	628

Fund summary

Principal investment strategies

The fund is a government money market fund. The fund seeks to maintain a constant net asset value of $1.00 per share by investing in high-quality, U.S. dollar denominated money market securities issued by the U.S. government and its agencies and instrumentalities.

The fund will invest at least 99.5% of its total assets in U.S. government securities, cash, and/or repurchase agreements that are fully collateralized by U.S. government securities or cash. In addition, under normal circumstances, the fund will invest at least 80% of its net assets in U.S. government securities and/or repurchase agreements that are collateralized by U.S. government securities.

The fund invests in accordance with the credit quality, maturity, liquidity and diversification requirements applicable to money market funds. Within these standards, the adviser's assessment of broad economic factors that are expected to affect economic activity and interest rates influences securities selection. The adviser also employs fundamental research and an evaluation of the issuer based on its financial statements and operations, to assess an issuer's credit quality.

Principal risks of investing in the fund

You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The fund's sponsor is not required to reimburse the fund for losses, and you should not expect that the sponsor will provide financial support to the fund at any time, including during periods of market stress.

The fund operates as a "government" money market fund under applicable federal regulations and invests in U.S. government securities. Circumstances could arise that would prevent the payment of interest or principal on U.S. government securities, which could adversely affect their value and the fund's ability to preserve the value of your investment at $1.00 per share. Recent changes in the rules governing money market funds are likely to result in an increased demand for U.S. government securities, which could affect the availability of such instruments for investment and the fund's ability to pursue its investment strategies.

If one or more money market funds were to incur a sizeable loss or impose fees on redemptions, there could be significant redemptions from money market funds in general, potentially driving the market prices of money market instruments down and adversely affecting market liquidity.

expense reimbursements, reductions or waivers are voluntary and temporary and may be terminated by the adviser at any time without notice. The adviser may not recapture fees and expenses previously waived and/or reimbursed.

The fund does not currently intend to avail itself of the ability to impose a discretionary liquidity fee on fund redemptions, as permitted under Rule 2a-7 under the 1940 Act. However, the Board of Trustees reserves the right, with notice to shareholders, to change this policy.

The fund could underperform other short-term debt instruments or money market funds.

Following is a summary description of principal risks of investing in the fund.

Interest rate and market risk. General market conditions, such as real or perceived adverse economic, political or regulatory conditions, political instability, recessions, inflation, changes in interest rates, lack of liquidity or other disruptions in the bond markets, the spread of infectious illness or other public health issues, weather or climate events, armed conflict, market disruptions caused by tariffs, trade disputes, sanctions or other government actions, or other factors or adverse investor sentiment or other adverse market events and conditions could cause the value of your investment in the fund, or its yield, to decline. While the fund seeks to maintain a $1.00 share price, if the market prices of securities held by the fund fall, the value of your investment could decline. Market prices will generally go down when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term securities. In recent years interest rates and credit spreads in the U.S. have been at historic lows. The U.S. Federal Reserve has raised certain interest rates, and interest rates may continue to go up. When the credit spread for a fixed income security goes up, or "widens," the value of the security will generally go down. A general rise in interest rates could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the fund.

In the past decade, financial markets throughout the world have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. Governmental and non-governmental issuers have defaulted on, or been forced to restructure, their debts. These conditions may continue, recur, worsen or spread. Events that have contributed to these market conditions include, but are not limited to, major cybersecurity events; geopolitical events (including wars, terror attacks and economic sanctions); measures to address budget deficits; downgrading of sovereign debt; changes in oil and commodity prices; dramatic changes in currency exchange rates; global pandemics; and public sentiment. The long-term impact of the COVID-19 pandemic and its subsequent variants on economies, markets, industries and individual issuers, are not known. Some sectors of the economy and individual issuers have experienced or may experience particularly large losses. Periods of extreme volatility in the financial markets, reduced liquidity of many instruments, increased government debt, inflation and disruptions to supply chains, consumer demand and employee availability, may continue for some time.

Fund summary

Raising the ceiling on U.S. government debt has become increasingly politicized. Any failure to increase the total amount that the U.S. government is authorized to borrow could lead to a default on U.S. government obligations, with unpredictable consequences for the fund's investments and the fund's ability to preserve the value of your investment at $1.00 per share, and generally for economies and markets in the U.S. and elsewhere. Inflation and interest rates have increased and may rise further. These circumstances could adversely affect the value and liquidity of the fund's investments, impair the fund's ability to satisfy redemption requests, and negatively impact the fund's performance. Following Russia's invasion of Ukraine, Russian securities lost all, or nearly all, their market value. Other securities or markets could be similarly affected by past or future political, geopolitical or other events or conditions.

Governments and central banks, including the U.S. Federal Reserve, have taken extraordinary and unprecedented actions to support local and global economies and the financial markets. These actions have resulted in significant expansion of public debt, including in the U.S. The consequences of high public debt, including its future impact on the economy and securities markets, may not be known for some time. U.S. Federal Reserve or other U.S. or non-U.S. governmental or central bank actions, including increases or decreases in interest rates, or contrary actions by different governments, could negatively affect financial markets generally, increase market volatility and reduce the value and liquidity of securities in which the fund invests. Policy and legislative changes in the U.S. and in other countries are affecting many aspects of financial regulation, and these and other events affecting global markets, such as the United Kingdom's exit from the European Union (or Brexit), potential trade imbalances with China or other countries, or sanctions or other government actions against Russia, other nations or individuals or companies (or their countermeasures), may contribute to decreased liquidity and increased volatility in the financial markets. The impact of these changes on the markets, and the implications for market participants, may not be fully known for some time.

The U.S. and other countries are periodically involved in disputes over trade and other matters, which may result in tariffs, investment restrictions and adverse impacts on affected companies and securities. For example, the U.S. has imposed tariffs and other trade barriers on Chinese exports, has restricted sales of certain categories of goods to China, and has established barriers to investments in China. Trade disputes may adversely affect the economies of the U.S. and its trading partners, as well as companies directly or indirectly affected and financial markets generally. The U.S. government has prohibited U.S. persons from investing in Chinese companies designated as related to the Chinese military. Chinese government is involved in a longstanding dispute with Taiwan that has included threats of invasion. If the political climate between the U.S. and China does not improve or continues to deteriorate, if China were to attempt unification of Taiwan by force, or if other geopolitical conflicts develop or get worse, economies, markets and individual securities may be severely affected both regionally and globally, and the value of the fund's assets may go down.

Economies and financial markets throughout the world are increasingly interconnected. Economic, financial or political events, trading and tariff arrangements, armed conflict, such as between Russia and Ukraine or in the Middle East, terrorism, natural disasters, infectious illnesses or public health issues, cybersecurity events, supply chain disruptions, sanctions against Russia, other nations or individuals or companies and possible countermeasures, and other circumstances in one country or region could have profound impacts on other countries or regions and on global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries or regions directly affected, the value and liquidity of the fund's investments may be negatively affected.

Until recently, a commonly used reference rate for floating rate securities was LIBOR (London Interbank Offered Rate). ICE Benchmark Administration, the administrator of LIBOR, has ceased publication of most LIBOR settings on a representative basis. Actions by regulators have resulted in the establishment of alternative reference rates to LIBOR in most major currencies. In the U.S., a common benchmark replacement is based on the Secured Overnight Financing Rate (SOFR) published by the Federal Reserve Bank of New York, including certain spread adjustments and benchmark replacement conforming changes, although other benchmark replacements (with or without spread adjustments) may be used in certain transactions. The impact of the transition from LIBOR on the fund's transactions and financial markets generally cannot yet be determined. The transition away from LIBOR may lead to increased volatility and illiquidity in markets for instruments that have relied on LIBOR and may adversely affect the fund's performance.

Credit risk.If an issuer or obligor of a security held by the fund or a counterparty to a financial contract with the fund defaults on its obligation to pay principal and/or interest, has its credit rating downgraded or is perceived to be less creditworthy, or the credit quality or value of any underlying assets declines, the value of your investment will decline. In addition, the default or downgrade of a single holding or issuer may cause significant deterioration in the fund's share price. Changes in actual or perceived creditworthiness may occur quickly. The fund could be delayed or hindered in its enforcement of rights against an issuer, guarantor or counterparty.

Yield risk. The amount of income received by the fund will go up or down depending on day-to-day variations in short-term interest rates, and when interest rates are very low the fund's expenses could absorb all or a significant portion of the fund's income. If interest rates increase, the fund's yield may not increase proportionately. For example, the fund's adviser may discontinue any temporary voluntary fee waivers.

Extension risk.During periods of rising interest rates, the average life of certain types of securities may be extended because of slower than expected principal payments. This may lock in a below market interest rate, increase the security's duration and reduce the value of the security.

Fund summary

Portfolio selection risk.The adviser's judgment about the quality, relative yield, relative value or market trends affecting a particular sector or region, market segment, security, industry or about interest rates or other market factors may prove to be incorrect or may not produce the desired results, or there may be imperfections, errors or limitations in the models, tools and information used by the adviser.

U.S. Treasury obligations risk. The market value of direct obligations of the U.S. Treasury may vary due to changes in interest rates. In addition, changes to the financial condition or credit rating of the U.S. government may cause the value of the fund's investments in obligations issued by the U.S. Treasury to decline.

U.S. government agency obligations risk.The fund invests in obligations issued by agencies and instrumentalities of the U.S. government. Government-sponsored entities such as the Federal National Mortgage Association (FNMA), the Federal Home Loan Mortgage Corporation (FHLMC) and the Federal Home Loan Banks (FHLBs), although chartered or sponsored by Congress, are not funded by congressional appropriations and the debt issued by them are neither guaranteed nor issued by the U.S. government. Such debt securities are subject to the risk of default on the payment of interest and/or principal, similar to debt of private issuers. The maximum potential liability of the issuers of some U.S. government obligations may greatly exceed their current resources, including any legal right to support from the U.S. government. Although the U.S. government has provided financial support to FNMA and FHLMC in the past, there can be no assurance that it will support these or other government-sponsored entities in the future.

Repurchase agreement risk.In the event that the other party to a repurchase agreement defaults on its obligations, the fund may encounter delay and incur costs before being able to sell the security. Such a delay may involve loss of interest or a decline in price of the security. In addition, if the fund is characterized by a court as an unsecured creditor, it would be at risk of losing some or all of the principal and interest involved in the transaction.

Valuation risk.The sales price the fund could receive for any particular portfolio investment may differ from the fund's last valuation of the investment, particularly for securities that trade in thin or volatile markets or that are valued using a fair value methodology. Investors who purchase or redeem fund shares on days when the fund is holding fair-valued securities may receive fewer or more shares or

lower or higher redemption proceeds than they would have received if the securities had not been fair-valued or if a different valuation methodology had been used. The ability to value the fund's investments may also be impacted by technological issues and/or errors by pricing services or other third party service providers.

Cybersecurity risk.Cybersecurity failures by and breaches of the fund's adviser, transfer agent, distributor, custodian, fund accounting agent or other service providers may disrupt fund operations, interfere with the fund's ability to calculate its NAV, prevent fund shareholders from purchasing, redeeming or exchanging shares or receiving distributions or receiving timely information regarding the fund or their investment in the fund, cause loss of or unauthorized access to private shareholder information, and result in financial losses to the fund and its shareholders, regulatory fines, penalties, reputational damage, or additional compliance costs. New ways to carry out cyber attacks continue to develop. Therefore, there is a chance that some risks have not been identified or prepared for, or that an attack may not be detected, which puts limitations on the fund's ability to plan for or respond to a cyber attack.

Expense risk.Your actual costs of investing in the fund may be higher than the expenses shown in "Annual fund operating expenses" for a variety of reasons. For example, expense ratios may be higher than those shown if overall net assets decrease or are lower than estimated, as a result of redemptions or otherwise, or if a voluntary fee waiver is changed or terminated.

Please note that there are many other factors that could adversely affect your investment and that could prevent the fund from achieving its goals.

The fund's past performance

The bar chart and table indicate the risks and volatility of an investment in the fund by showing how the fund has performed in the past. The bar chart shows changes in the performance of the fund's Class A shares from calendar year to calendar year.The table shows the average annual total returns for each class of the fund over time. You can obtain updated performance information by visiting https://www.amundi.com/usinvestors/Products/Mutual-Fundsor by calling 1-800-225-6292.

Fund summary

Prior to November 13, 2015, the fund operated as a "prime" money market fund. Performance shown for periods prior to November 13, 2015 reflect the fund's former investment strategy.

The fund's past performance (before and after taxes) does not necessarily indicate how it will perform in the future.

Annual return Class A shares (%)

(Year ended December 31)

For the period covered by the bar chart:

	Returns	Period Beginning	Period Ending
Highest Calendar Quarter	1.22%	10/01/2023 to	12/31/2023
Lowest Calendar Quarter	0.00%	07/01/2021 to	09/30/2021

Average annual total return (%)

(for periods ended December 31, 2023)

	1 Year	5 Years	10 Years	Since Inception	Inception Date
Class A	4.61	1.53	0.92	2.69	6/22/1987
Class R	4.11	1.27	N/A	1.12	8/1/2017
Class Y	4.67	1.58	0.96	1.27	9/26/2005

Management

Investment adviser	Amundi Asset Management US, Inc. ("Amundi US")
Portfolio management	Timothy Rowe, Managing Director and Director of Multi-Sector Fixed Income of Amundi US (portfolio manager of the fund since 2021); and Gregory R. Palmer, Vice President of Amundi US (portfolio manager of the fund since 2020)

Purchase and sale of fund shares

You may purchase, exchange or sell (redeem) shares each day the New York Stock Exchange is open through your financial intermediary or, for accounts held directly with the fund, by contacting the fund in writing or by telephone, Pioneer Funds, P.O. Box 534427, Pittsburgh, PA 15253-4427, tel. 1-800-225-6292.

Your initial investment for Class A shares must be at least $1,000. Additional investments must be at least $100 for Class A shares. Generally, the initial investment for Class Y shares must be at least $5 million. This amount may be invested in one or more of the Pioneer mutual funds that currently offer Class Y shares. There is no minimum additional investment amount for Class Y shares. There is no minimum investment amount for Class R shares.

Tax information

The fund intends to make distributions that may be taxed as ordinary income or capital gains.

Payments to broker-dealers and other financial intermediaries

If you purchase the fund through a broker-dealer or other financial intermediary (such as a bank), the fund and its related companies may pay the intermediary for the sale of fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson or investment professional to recommend the fund over another investment. Ask your salesperson or investment professional or visit your financial intermediary's website for more information.

More on the fund's investment objectives and strategies

Investment objectives

Preservation of capital, liquidity, and current income.

The fund's investment objectives may be changed without shareholder approval. The fund will provide at least 30 days' written notice prior to implementing any change to its investment objectives.

Principal investment strategies

The fund invests in accordance with the credit quality, maturity, liquidity and diversification requirements applicable to money market funds. Within these standards, the assessment of broad economic factors that are expected to affect economic activity and interest rates influences securities selection by Amundi Asset Management US, Inc. ("Amundi US" or the "adviser"), the fund's investment adviser. Amundi US also employs fundamental research and an evaluation of the issuer based on its financial statements and operations, to assess an issuer's credit quality.

The fund seeks to invest in securities that present minimal credit risks to the fund.

The fund invests exclusively in securities with a maximum remaining maturity of 397 days and maintains a dollar-weighted average portfolio maturity of 60 days or less. In addition, the fund maintains a dollar weighted average life of not more than 120 days.

The fund must follow strict rules with respect to the liquidity of its portfolio securities including daily and weekly liquidity requirements. In addition, the fund may not purchase illiquid securities if, as a result of the acquisition, more than 5% of the fund's total assets would be invested in illiquid securities.

The fund's investment strategies and policies may be changed from time to time without shareholder approval, unless specifically stated otherwise in this prospectus or in the statement of additional information.

U.S. government securities

The fund may invest in U.S. government securities. U.S. government securities are obligations of, or guaranteed by, the U.S. government, its agencies or government-sponsored entities. U.S. government securities include obligations: directly issued by or supported by the full faith and credit of the U.S. government, like Treasury bills, notes and bonds and Government National Mortgage Association (GNMA) certificates; supported by the right of the issuer to borrow from the U.S. Treasury, like those of the Federal Home Loan Banks (FHLBs); supported by the discretionary authority of the U.S. government to purchase the agency's securities, like those of the Federal National Mortgage Association (FNMA); or supported only by the credit of the issuer itself, like the Tennessee Valley Authority. U.S. government securities include issues by non-governmental entities (like financial institutions) that carry direct guarantees from U.S. government agencies. U.S. government securities include zero coupon securities that make payments of interest and principal only upon maturity and which therefore tend to be subject to greater volatility than interest-bearing securities with comparable maturities.

Although the U.S. government guarantees principal and interest payments on securities issued by the U.S. government and some of its agencies, such as securities issued by the GNMA, this guarantee does not apply to losses resulting from declines in the market value of these securities. Some of the U.S. government securities that the fund may hold are not guaranteed or backed by the full faith and credit of the U.S. government, such as those issued by FNMA and the Federal Home Loan Mortgage Corporation (FHLMC).

U.S. Treasury obligations

U.S. Treasury obligations are direct debt obligations issued by the U.S. government. Treasury bills, with maturities normally from 4 weeks to 52 weeks, are typically issued at a discount as they pay interest only upon maturity. Treasury bills are non-callable. Treasury notes have a maturity between two and ten years and typically pay interest semiannually, while Treasury bonds have a maturity of over ten years and pay interest semiannually. Treasuries also include STRIPS, TIPS and FRNs. STRIPS are Treasury obligations with separately traded principal and interest component parts that are transferable through the federal book-entry system. Because payments on STRIPS are made only at maturity, during periods of changing interest rates, STRIPS may be more volatile than unstripped U.S. Treasury obligations with comparable maturities. TIPS are Treasury Inflation-Protected Securities, the principal of which increases with inflation and decreases with deflation, as measured by the Consumer Price Index. At maturity, a TIPS holder is entitled to the adjusted principal or original principal, whichever is greater. TIPS pay interest twice a year, at a fixed rate. The rate is applied to the adjusted principal; so, like the principal,

More on the fund's investment objectives and strategies

interest payments rise with inflation and fall with deflation. However, because the interest rate is fixed, TIPS may lose value when market interest rates increase, particularly during periods of low inflation. FRNs are newly introduced floating rate notes that are indexed to the most recent 13-week Treasury bill auction High Rate, and which pay interest quarterly. U.S. Treasury obligations typically offer lower interest rates than other obligations.

Repurchase agreements

In a repurchase agreement, the fund purchases securities from a broker/dealer or a bank, called the counterparty, upon the agreement of the counterparty to repurchase the securities from the fund at a later date, and at a specified price. The repurchase price is generally higher than the purchase price paid by the fund, with the difference being income to the fund. The securities purchased serve as the fund's collateral for the obligation of the counterparty to repurchase the securities. If the counterparty does not repurchase the securities, the fund is entitled to sell the securities, but the fund may not be able to sell them for the price at which they were purchased, thus causing a loss. Additionally, if the counterparty becomes insolvent, there is some risk that the fund will not have a right to the securities, or the immediate right to sell the securities.

Additional investment strategies and related risks

In addition to the principal investment strategies and related risks discussed in this prospectus, the fund may also use other techniques, including the following non-principal investment strategies and related risks.

Reverse repurchase agreements and borrowing

The fund may enter into reverse repurchase agreements pursuant to which the fund transfers securities to a counterparty in return for cash, and the fund agrees to repurchase the securities at a later date and for a higher price. Reverse repurchase agreements are treated as borrowings by the fund, are a form of leverage and may make the value of an investment in the fund more volatile and increase the risks of investing in the fund. The fund also may borrow money from banks or other lenders for temporary purposes. The fund may borrow up to 331∕3% of its total assets. Entering into reverse repurchase agreements and other borrowing transactions may cause the fund to liquidate positions when it may not be advantageous to do so in order to satisfy its obligations.

"When-issued," delayed delivery, to be announced and forward commitment transactions

The fund may purchase and sell securities, including mortgaged-backed securities, on a when-issued, delayed delivery, to be announced or forward commitment basis. These transactions arise when securities are purchased or sold by the fund with payment and delivery taking place at a fixed future date. The fund will not earn income on these securities until delivered. The fund may engage in these transactions when it believes they would result in a favorable price and yield for the security being purchased or sold.

More on the risks of investing in the fund

Principal risks of investing in the fund

From time to time, the adviser and its affiliates have reimbursed or otherwise reduced the fund's expenses and the adviser has waived a portion of its management fee in an effort to maintain a net asset value of $1.00 per share, for the purpose of avoiding a negative yield or increasing the fund's yield. The adviser and its affiliates may, but are not required to, waive and/or reimburse fees in the future. Any such expense reimbursements, reductions or waivers are voluntary and temporary and may be terminated by the adviser at any time without notice. The adviser may not recapture fees and expenses previously waived and/or reimbursed.

The fund could take other actions in an effort to maintain a net asset value of $1.00 per share. For example, a negative interest rate environment could impact the fund's ability to maintain a net asset value of $1.00 per share. During a negative interest rate environment, the fund could reduce the number of its outstanding shares to seek to maintain a $1.00 per share net asset value. If the fund were to reduce the number of its outstanding shares, you would own fewer shares and lose money.

The fund could underperform other short-term debt instruments or money market funds.

Following is a description of principal risks of investing in the fund.

Interest rate and market risk.General market conditions, such as real or perceived adverse economic, political or regulatory conditions, political instability, recessions, inflation, changes in interest rates, lack of liquidity or other disruptions in the bond markets, the spread of infectious illness or other public health issues, weather or climate events, armed conflict, market disruptions caused by tariffs, trade disputes, sanctions or other government actions, or other factors or adverse investor sentiment or other adverse market events and conditions could cause the value of your investment in the fund, or its yield, to decline. While the fund seeks to maintain a $1.00 share price, if the market prices of securities held by the fund fall, the value of your investment could decline. Market prices will generally go down when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term securities. In recent years interest rates and credit spreads in the U.S. have been at historic lows. The U.S. Federal Reserve has raised certain interest rates, and interest rates may continue to go up. When the credit spread for a fixed income security goes up, or "widens," the value of the security will generally go down. A general rise in interest rates could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the fund.

In the past decade, financial markets throughout the world have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. Governmental and non-governmental issuers have defaulted on, or been forced to restructure, their debts. These conditions may continue, recur, worsen or spread. Events that have contributed to these market conditions include, but are not limited to, major cybersecurity events; geopolitical events (including wars, terror attacks and economic sanctions); global pandemics; measures to address budget deficits; downgrading of sovereign debt; changes in oil and commodity prices; dramatic changes in currency exchange rates; and public sentiment. The long-term impact of the COVID-19 pandemic and its subsequent variants on economies, markets, industries and individual issuers, are not known. Some sectors of the economy and individual issuers have experienced or may experience particularly

More on the risks of investing in the fund

large losses. Periods of extreme volatility in the financial markets, reduced liquidity of many instruments, increased government debt, inflation, and disruptions to supply chains, consumer demand and employee availability, may continue for some time.

Governments and central banks, including the U.S. Federal Reserve, have taken extraordinary and unprecedented actions to support local and global economies and the financial markets. These actions have resulted in significant expansion of public debt, including in the U.S. The consequences of high public debt, including its future impact on the economy and securities markets, may not be known for some time. U.S. Federal or other U.S. or non-U.S. governmental or central bank actions, including increases or decreases in interest rates or contrary actions by different governments, could negatively affect financial markets generally, increase market volatility and reduce the value and liquidity of securities in which the fund invests. Policy and legislative changes in the U.S. and in other countries and other events affecting global markets, such as the United Kingdom's exit from the European Union (or Brexit), potential trade imbalances with China or other countries, or sanctions or other government actions against Russia, other nations or individuals or companies (or their countermeasures), may contribute to decreased liquidity and increased volatility in the financial markets. The impact of these changes on the markets, and the implications for market participants, may not be fully known for some time.

Trade disputes may adversely affect the economies of the U.S. and its trading partners, as well as companies directly or indirectly affected and financial markets generally. The U.S. government has prohibited U.S. persons from investing in Chinese companies designated as related to the Chinese military. The Chinese government is involved in a longstanding dispute with Taiwan that has included threats of invasion. If the political climate between the U.S. and China does not improve or continues to deteriorate, if China were to attempt unification of Taiwan by force, or if other geopolitical conflicts develop or get worse, economies, markets and individual securities may be severely affected both regionally and globally, and the value of the fund's assets may go down.

Credit risk.An issuer or other obliger (such as a party providing insurance or other credit enhancement) may fail to make the required payments on securities held by the fund. Debt securities also go up or down in value based on the perceived

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creditworthiness of issuers or other obligors. If an obligor for a security held by the fund or a counterparty to a financial contract with the fund fails to pay, otherwise defaults or is perceived to be less creditworthy, a security's credit rating is downgraded, which could happen rapidly, or the credit quality or value of any underlying assets declines, the value of your investment in the fund could decline significantly, particularly in certain market environments. Changes in actual or perceived creditworthiness may occur quickly. In addition, the default or downgrade of a single holding or issuer may cause significant deterioration in the fund's share price. If a single entity provides credit enhancement to more than one of the fund's investments, the adverse effects resulting from the downgrade or default will increase the adverse effects on the fund. The credit quality of the fund's holdings can change rapidly in certain markets. If the fund enters into a financial contract (such as a repurchase agreement or reverse repurchase agreement) the fund will be subject to the credit risk presented by the counterparty. In addition, the fund may incur expenses in an effort to protect the fund's interests or to enforce its rights.

Generally, applicable regulations require that the fund invest only in securities that have a remaining maturity of 397 days or less. However, these regulations permit the fund to use interest rate reset dates or demand features in calculating a security's maturity for purposes of regulatory maturity limitations, rather than using the security's actual maturity. Accordingly, the fund may invest in securities that have an actual maturity which is greater than 397 days, and the security's value may decline on the basis of perceived longer term credit risk of the issuer.

Upon the occurrence of certain triggering events or defaults on a security held by the fund, or if the portfolio manager believes that an obligor of such a security may have difficulty meeting its obligations, the fund may obtain a new or restructured security or underlying assets. In that case, the fund may become the holder of securities or assets that it could not otherwise purchase (for example, because they are of lower quality or are subordinated to other obligations of the issuer) at a time when those assets may be difficult to sell or can be sold only at a loss. Any of these events may cause you to lose money.

Yield risk.The fund invests in short-term money market instruments. As a result, the amount of income received by the fund will go up or down depending on day-to-day variations in short-term interest rates. Investing in high quality, short-term instruments may result in a lower yield (the income on your investment) than investing in lower quality or longer-term instruments. When interest rates are very low, the fund's expenses could absorb all or a significant portion of the fund's income, and, if the fund's expenses exceed the fund's income, the fund may be unable to maintain its $1.00 share price. If interest rates increase, the fund's yield

may not increase proportionately. For example, the fund's adviser may discontinue any temporary voluntary fee waivers. A money market fund is also required to maintain liquidity levels based on the characteristics and anticipated liquidity needs of its shareholders. A fund with greater liquidity needs may have a lower yield than money market funds with a different shareholder base.

To the extent the fund invests significantly in mortgage-related and asset-backed securities, its exposure to extension risks may be greater than if it invested in other fixed income securities.

U.S. Treasury obligations risk.The market value of direct obligations of the U.S. Treasury may vary due to changes in interest rates. In addition, changes to the financial condition or credit rating of the U.S. government may cause the value of the fund's investments in obligations issued by the U.S. Treasury to decline.

U.S. government agency obligations risk.The fund invests in obligations issued by agencies and instrumentalities of the U.S. government. Government sponsored entities such as FNMA, FHLMC and the FHLBs, although chartered or sponsored by Congress, are not funded by congressional appropriations and the debt securities issued by them are neither guaranteed nor issued by the U.S. government. The maximum potential liability of the issuers of some U.S. government obligations may greatly exceed their current resources, including any legal right to support from the U.S. government. Such debt securities are subject to the risk of default in the payment of interest and/or principal, similar to debt of private issuers. Although the U.S. government has provided financial support to FNMA and FHLMC in the past, there can be no assurance that it will support these or other government sponsored entities in the future.

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or a decline in price of the security. In addition, if the fund is characterized by a court as an unsecured creditor, it would be at risk of losing some or all of the principal and interest involved in the transaction.

Risks of investing in "when-issued," delayed delivery, to be announced and forward commitment transactions.The market value of these transactions may increase or decrease as a result of changes in interest rates. These transactions involve risk of loss if the value of the underlying security changes unfavorably before the settlement date or if the assets set aside to pay for these securities decline in value prior to the settlement date. Therefore, these transactions may have a leveraging effect on the fund, making the value of an investment in the fund more volatile and increasing the fund's overall investment exposure. There is also a risk that the security will not be issued or that the other party to the transaction will default on its obligation to purchase or sell the security, which may result in the fund missing the opportunity to obtain a favorable price or yield elsewhere.

Liquidity risk.Liquidity risk exists when particular investments are impossible or difficult to sell. Although most of the fund's investments must be liquid at the time of investment, investments may become illiquid after purchase by the fund, particularly during times of market turmoil or due to adverse changes in the conditions of a particular issuer. Markets may become illiquid when, for instance, there are few, if any, interested buyers and sellers or when dealers are unwilling to make a market for certain securities or when dealer market-making capacity is otherwise reduced. During times of market turmoil, there have been, and may be, no buyers for securities in entire asset classes, including U.S. Treasury securities. A lack of liquidity or other adverse credit market conditions may affect the fund's ability to sell the securities in which it invests or to fund and purchase suitable investments. Illiquid investments may also be difficult to value. If the fund is forced to sell an illiquid investment to meet redemption requests or other cash needs or to try to limit losses, the fund may suffer a substantial loss or may not be able to sell at all. Liquidity risk is magnified in an environment of rising interest rates or widening credit spreads in which investor redemptions may be higher than normal.

had not been fair-valued or if a different valuation methodology had been used. The ability to value the fund's investments may also be impacted by technological issues and/or errors by pricing services or other third party service providers.

Redemption risk. The fund may experience periods of heavy redemptions that could cause the fund to liquidate its assets at inopportune times or at a loss or depressed value, or accelerate taxable gains or transaction costs, particularly during periods of declining or illiquid markets. Redemption risk is greater to the extent that the fund has investors with large shareholdings, short investment horizons, or unpredictable cash flow needs. In addition, redemption risk is heightened during periods of overall market turmoil. The redemption by one or more large shareholders of their holdings in the fund could cause the remaining shareholders in the fund to lose money. Further, if one decision maker has control of fund shares owned by separate fund shareholders, redemptions by these shareholders may further increase the fund's redemption risk. If the fund is forced to liquidate its assets under unfavorable conditions or at inopportune times, the fund's ability to maintain a stable $1.00 share price may be affected. In addition, the fund may suspend redemptions when permitted by applicable regulations.

Cybersecurity risk.Cybersecurity failures by and breaches of the fund's adviser, transfer agent, distributor, custodian, fund accounting agent or other service providers may disrupt fund operations, interfere with the fund's ability to calculate its NAV, prevent fund shareholders from purchasing, redeeming or exchanging shares or receiving distributions or receiving timely information regarding the fund or their investment in the fund, cause loss of or unauthorized access to private shareholder information, and result in financial losses to the fund and its shareholders, regulatory fines, penalties, reputational damage, or additional compliance costs. Substantial costs may be incurred in order to prevent any cyber incidents in the future. The fund and its shareholders could be negatively impacted as a result. New ways to carry out cyber attacks continue to develop. Therefore, there is a chance that some risks have not been identified or prepared for, or that an attack may not be detected, which puts limitations on the fund's ability to plan for or respond to a cyber attack.

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Disclosure of portfolio holdings

The fund's policies and procedures with respect to disclosure of the fund's securities are described in the statement of additional information.

Management

Investment adviser

Amundi Asset Management US, Inc. ("Amundi US"), the fund's investment adviser, selects the fund's investments and oversees the fund's operations.

Amundi US is an indirect, wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi Holdings US, Inc. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As of December 31, 2023, Amundi had more than $2.2 trillion in assets under management worldwide. As of December 31, 2023, Amundi US (and its U.S. affiliates) had over $98 billion in assets under management.

Amundi US's main office is at 60 State Street, Boston, Massachusetts 02109.

The firm's U.S. mutual fund investment history includes creating in 1928 one of the first mutual funds.

Amundi US has received an order from the Securities and Exchange Commission that permits Amundi US, subject to the approval of the fund's Board of Trustees, to hire and terminate a subadviser that is not affiliated with Amundi US (an "unaffiliated subadviser") or to materially modify an existing subadvisory contract with an unaffiliated subadviser for the fund without shareholder approval. Amundi US retains the ultimate responsibility to oversee and recommend the hiring, termination and replacement of any unaffiliated subadviser.

Management

Portfolio management

Day-to-day management of the fund's portfolio is the responsibility of Timothy Rowe (portfolio manager of the fund since 2021) and Gregory R. Palmer (portfolio manager of the fund since 2020). Mr. Rowe and Mr. Palmer are supported by the Amundi US fixed income team. Members of this team manage other Pioneer funds investing primarily in fixed income securities. The portfolio managers and the team also may draw upon the research and investment management expertise of one or more of Amundi US's affiliates.

Mr. Rowe, Managing Director and Director of Multi-Sector Fixed Income of Amundi US, joined Amundi US in 1988 and has been a portfolio manager of the fund since 2021.

Mr. Palmer, a Vice President of Amundi US, joined Amundi US in 1998 and has been a portfolio manager of the fund since 2020. He has been an investment professional for over 20 years.

The fund's statement of additional information provides additional information about the portfolio managers' compensation, other accounts managed by the portfolio managers, and the portfolio managers' ownership of shares of the fund.

Management fee

The fund pays Amundi US a fee for managing the fund and to cover the cost of providing certain services to the fund.

Amundi US's annual fee is equal to 0.35% of the fund's average daily net assets up to $1 billion and 0.30% of the fund's average daily net assets over $1 billion. The fee is accrued daily and paid monthly.

For the fiscal year ended December 31, 2023, the fund paid management fees (excluding waivers and/or assumption of expenses) equivalent to 0.35% of the fund's average daily net assets.

A discussion regarding the basis for the Board of Trustees' approval of the management contract is available in the fund's annual report to shareholders for the period ended December 31, 2023.

Distributor

Amundi Distributor US, Inc. is the fund's distributor. The fund compensates the distributor for its services. The distributor is an affiliate of Amundi US.

Pricing of shares

Net asset value

The fund's net asset value is the value of its securities plus other assets minus its accrued operating expenses and other liabilities. The fund calculates a net asset value for each class of shares twice daily, every day the New York Stock Exchange is open, at 1:00 p.m. Eastern time and as of the close of regular trading (normally 4:00 p.m. Eastern time). On days when the New York Stock Exchange is closed for trading, including certain holidays listed in the statement of additional information, a net asset value generally is not calculated. The fund's most recent net asset value is available on the fund's web site, amundi.com/us.

The fund generally values its securities using the amortized cost method. This valuation method assumes a steady rate of amortization of any premium or discount from the date of purchase until the maturity of each security. This valuation method is designed to permit a money market fund to maintain a constant net asset value of $1.00 per share, but there is no guarantee that it will do so.

You buy or sell shares at the share price. When you buy a class of shares, you do not pay an initial sales charge. When you sell Class A shares, you may pay a contingent deferred sales charge under certain circumstances - see "Choosing a class of shares - Class A shares."

Choosing a class of shares

The fund offers three classes of shares through this prospectus. Each class has different eligibility requirements and expenses, allowing you to choose the class that best meets your needs.

Factors you should consider include:

•

The eligibility requirements that apply to purchases of a particular share class

•

The expenses paid by each class

•

How long you expect to own the shares

•

Any services you may receive from a financial intermediary

Your investment professional can help you determine which class meets your goals. Your investment professional or financial intermediary may receive different compensation depending upon which class you choose.

For information on the fund's expenses, please see "Fund Summary."

Class A shares

•

You do not pay an initial sales charge, but you may pay a sales charge if you exchange your shares for Class A shares of another Pioneer mutual fund.

•

There is no contingent deferred sales charge on the sale of fund shares you purchase. However, if you exchange shares of another Pioneer mutual fund for shares of the fund, any contingent deferred sales charge that applied to your shares of the other Pioneer mutual fund at the time of the exchange will continue to apply to your shares of the fund after the exchange. When you ultimately sell your shares of the fund, the date of your original purchase of shares of the other Pioneer mutual fund will determine your contingent deferred sales charge.

•

Distribution and service fees of 0.15% of average daily net assets.

Class R shares

•

No initial or contingent deferred sales charge.

•

Distribution fees of 0.50% of average daily net assets. Separate service plan provides for payment to financial intermediaries of up to 0.25% of average daily net assets.

•

Generally, available only through certain tax-deferred retirement plans and related accounts.

Class Y shares

•

No initial or contingent deferred sales charge. However, if you invest in Class Y shares through an investment professional or financial intermediary, that investment

professional or financial intermediary may charge you a commission in an amount determined and separately disclosed to you by that investment professional or financial intermediary.

•

Initial investments are subject to a $5 million investment minimum, which may be waived in some circumstances.

Share class eligibility

Class R shares

Class R shares are available to certain tax-deferred retirement plans (including 401(k) plans, employer-sponsored 403(b) plans, 457 plans, profit sharing and money purchase pension plans, defined benefit plans and non-qualified deferred compensation plans) held in plan level or omnibus accounts. Class R shares also are available to IRAs that are rollovers from eligible retirement plans that offered one or more Class R share Pioneer funds as investment options and to individual 401(k) plans. Class R shares are not available to non-retirement accounts, traditional or Roth IRAs, Coverdell Education Savings Accounts, SEPs, SAR-SEPs, SIMPLE IRAs, individual 403(b)s and most individual retirement accounts or retirement plans that are not subject to the Employee Retirement Income Security Act of 1974 (ERISA).

Distribution and service arrangements

Distribution plan

The fund has adopted a distribution plan for Class A and Class R shares in accordance with Rule 12b-1 under the Investment Company Act of 1940. Under the plan, the fund pays distribution and service fees to the distributor. From time to time, the distributor and/or financial intermediaries may agree to a reduction or waiver of these fees. Because these fees are an ongoing expense of the fund, over time they increase the cost of your investment and your shares may cost more than shares that are subject to other types of sales charges.

Class R shares service plan

The fund has adopted a separate service plan for Class R shares. Under the service plan, the fund may pay securities dealers, plan administrators or other financial intermediaries who agree to provide certain services to plans or plan participants holding shares of the fund a service fee of up to 0.25% of average daily net assets attributable to Class R shares held by such plan participants. The services provided under the service plan include acting as a shareholder of record, processing purchase and redemption orders, maintaining participant account records and answering participant questions regarding the fund.

Additional payments to financial intermediaries

Your financial intermediary may receive compensation from the fund, Amundi US or its affiliates for the sale of fund shares and related services. Compensation may include sales commissions and distribution and service (Rule 12b-1) fees, as well as compensation for administrative services and transaction processing.

Amundi US or its affiliates may make additional payments to your financial intermediary. These payments may provide your financial intermediary with an incentive to favor the Pioneer funds over other mutual funds or assist the distributor in its efforts to promote the sale of the fund's shares. Financial intermediaries include broker-dealers, banks (including bank trust departments), registered investment advisers, financial planners, retirement plan administrators and other types of intermediaries.

Amundi US or its affiliates make these additional payments (sometimes referred to as "revenue sharing") to financial intermediaries out of its own assets, which may include profits derived from services provided to the fund, or from the retention of a portion of sales charges or distribution and service fees. Amundi US may base these payments on a variety of criteria, including the amount of sales or assets of the Pioneer funds attributable to the financial intermediary or as a per transaction fee.

Not all financial intermediaries receive additional compensation and the amount of compensation paid varies for each financial intermediary. In certain cases, these payments may be significant. Amundi US determines which firms to support and the extent of the payments it is willing to make, generally choosing firms that have a strong capability to effectively distribute shares of the Pioneer funds and that are willing to cooperate with Amundi US's promotional efforts. Amundi US also may compensate financial intermediaries (in addition to amounts that may be paid by the fund) for providing certain administrative services and transaction processing services.

Amundi US may benefit from revenue sharing if the intermediary features the Pioneer funds in its sales system (such as by placing certain Pioneer funds on its preferred fund list or giving access on a preferential basis to members of the financial intermediary's sales force or management). In addition, the financial intermediary may agree to participate in the distributor's marketing efforts (such as by helping to facilitate or provide financial assistance for conferences, seminars or other programs at which Amundi US personnel may make presentations on the Pioneer funds to the intermediary's sales force). To the extent intermediaries sell more shares of the Pioneer funds or retain shares of the Pioneer funds in their clients' accounts, Amundi US receives greater management and other fees due to the increase in the Pioneer funds' assets. The intermediary may earn a profit on these payments if the amount of the payment to the intermediary exceeds the intermediary's costs.

The compensation that Amundi US pays to financial intermediaries is discussed in more detail in the fund's statement of additional information. Your intermediary may charge you additional fees or commissions other than those disclosed in this prospectus. Intermediaries may categorize and disclose these arrangements differently than in the discussion above and in the statement of additional information. You can ask your financial intermediary about any payments it receives from Amundi US or the Pioneer funds, as well as about fees and/or commissions it charges.

Amundi US and its affiliates may have other relationships with your financial intermediary relating to the provision of services to the Pioneer funds, such as providing omnibus account services or effecting portfolio transactions for the Pioneer funds. If your intermediary provides these services, Amundi US or the Pioneer funds may compensate the intermediary for these services. In addition, your intermediary may have other relationships with Amundi US or its affiliates that are not related to the Pioneer funds.

Sales charges

Paying the contingent deferred sales charge (CDSC)

Several rules apply for calculating CDSCs so that you pay the lowest possible CDSC.

•

The CDSC is calculated on the current market value or the original cost of the shares you are selling, whichever is less

•

You do not pay a CDSC on reinvested dividends or distributions

•

If you sell only some of your shares, the transfer agent will first sell your shares that are not subject to any CDSC and then the shares that you have owned the longest

•

You may qualify for a waiver of the CDSC normally charged. See "Waiver or reduction of contingent deferred sales charges"

Waiver or reduction of contingent deferred sales charges

It is your responsibility to confirm that your investment professional has notified the distributor of your eligibility for a reduced sales charge at the time of sale. If you or your investment professional do not notify the distributor of your eligibility, you will risk losing the benefits of a reduced sales charge.

The distributor may waive or reduce the CDSC for Class A shares that are subject to a CDSC if:

•

The distribution results from the death of all registered account owners or a participant in an employer-sponsored plan. For UGMAs, UTMAs and trust accounts, the waiver applies only upon the death of all beneficial owners;

•

You become disabled (within the meaning of Section 72 of the Internal Revenue Code of 1986, as amended (the "Internal Revenue Code")) after the purchase of the shares being sold. For UGMAs, UTMAs and trust accounts, the waiver only applies upon the disability of all beneficial owners;

•

The distribution is made in connection with limited automatic redemptions as described in "Systematic withdrawal plans" (limited in any year to 10% of the value of the account in the fund at the time the withdrawal plan is established);

•

The distribution is from any type of IRA, 403(b) or employer-sponsored plan described under Section 401(a) or 457 of the Internal Revenue Code and, in connection with the distribution, one of the following applies:

−

It is part of a series of substantially equal periodic payments made over the life expectancy of the participant or the joint life expectancy of the participant and his or her beneficiary (limited in any year to 10% of the value of the participant's account at the time the distribution amount is established);

−

It is a required minimum distribution due to the attainment of age 70½, in which case the distribution amount may exceed 10% (based solely on total plan assets held in Pioneer mutual funds);

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It is rolled over to or reinvested in another fund in the Pioneer Funds mutual fund complex in the same class of shares, which will be subject to the CDSC of the shares originally held; or

−

It is in the form of a loan to a participant in a plan that permits loans (each repayment applied to the purchase of shares will be subject to a CDSC as though a new purchase);

•

The distribution is to a participant in an employer-sponsored retirement plan described under Section 401(a) of the Internal Revenue Code or to a participant in an employer-sponsored 403(b) plan or employer-sponsored 457 plan if (i) your employer has made special arrangements for your plan to operate as a group through a single broker, dealer or financial intermediary and (ii) all participants in the plan who purchase shares of a Pioneer mutual fund do so through a single broker, dealer or other financial intermediary designated by your employer and is or is in connection with:

−

A return of excess employee deferrals or contributions;

−

A qualifying hardship distribution as described in the Internal Revenue Code;

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Due to retirement or termination of employment;

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From a qualified defined contribution plan and represents a participant's directed transfer, provided that this privilege has been preauthorized through a prior agreement with the distributor regarding participant directed transfers;

•

The distribution is made pursuant to the fund's right to liquidate or involuntarily redeem shares in a shareholder's account;

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The distribution is made to pay an account's advisory or custodial fees; or

•

The distributor does not pay the selling broker a commission normally paid at the time of the sale.

Please see the fund's statement of additional information for more information regarding reduced sales charges and breakpoints.

Buying, exchanging and selling shares

Opening your account

You may open an account by completing an account application and sending it to the fund by mail or by fax. Please call the fund to obtain an account application. Certain types of accounts, such as retirement accounts, have separate applications.

Use your account application to select options and privileges for your account. You can change your selections at any time by sending a completed account options form to the fund. You may be required to obtain a signature guarantee to make certain changes to an existing account.

Call or write to the fund for account applications, account options forms and other account information:

Pioneer Funds
P.O. Box 534427
Pittsburgh, PA 15253-4427
Telephone 1-800-225-6292

Please note that there may be a delay in receipt by the fund's transfer agent of applications submitted by regular mail to a post office address.

Each fund is generally available for purchase in the United States, Puerto Rico, Guam, American Samoa and the U.S. Virgin Islands. Except to the extent otherwise permitted by the funds' distributor, the funds will only accept accounts from U.S. citizens with a U.S. address (including an APO or FPO address) or resident aliens with a U.S. address (including an APO or FPO address) and a U.S. taxpayer identification number.

Identity verification

To help the government fight the funding of terrorism and money laundering activities, federal law requires all financial institutions to obtain, verify and record information that identifies each person who opens an account. When you open an account, you will need to supply your name, address, date of birth, and other information that will allow the fund to identify you.

The fund may close your account if we cannot adequately verify your identity. The redemption price will be the net asset value on the date of redemption.

Investing through financial intermediaries and retirement plans

If you invest in the fund through your financial intermediary or through a retirement plan, the options and services available to you may be different from those discussed in this prospectus. Shareholders investing through financial intermediaries, programs sponsored by financial intermediaries and retirement plans may only purchase funds and classes of shares that are available. When you invest through an account

that is not in your name, you generally may buy and sell shares and complete other transactions only through the account. Ask your investment professional or financial intermediary for more information.

Additional conditions may apply to your investment in the fund, and the investment professional or intermediary may charge you a transaction-based, administrative or other fee for its services. These conditions and fees are in addition to those imposed by the fund and its affiliates. You should ask your investment professional or financial intermediary about its services and any applicable fees.

Share prices for transactions

If you place an order to purchase, exchange or sell shares that is received in good order by the fund's transfer agent or an authorized agent by the close of regular trading on the New York Stock Exchange (usually 4:00 p.m. Eastern time), (except for orders received by 1:00 p.m. meeting the requirements referenced below) the share price for your transaction will be based on the net asset value determined as of the close of regular trading on the New York Stock Exchange on that day (plus or minus any applicable sales charges). If your order is received by the fund's transfer agent or an authorized agent after the close of regular trading on the New York Stock Exchange, or your order is not in good order, the share price will be based on the net asset value next determined after your order is received in good order by the fund or authorized agent. The authorized agent is responsible for transmitting your order to the fund in a timely manner.

On any day that the money markets in which the fund invests close early, such as days in advance of holidays or in the event of an emergency, the fund reserves the right to advance the time when the fund's share price is determined (and by which transaction orders must be received) to the closing time of the markets.

You begin earning dividends on the first business day after the fund is credited with same day funds for your purchase. However, if your purchase order is received by the fund by 1:00 p.m. with payment through same-day wire meeting the requirements referenced below, you also will receive dividends declared that day.

There are special requirements if you wish to purchase fund shares by wire, have your order executed at 1:00 p.m. and receive dividends for that day. You or your investment firm must contact the fund at 1-800-225-6292, to be pre-approved.

Wire transfers normally take two or more hours to complete and a fee may be charged by the sending bank

Good order means that:

•

You have provided adequate instructions

Buying, exchanging and selling shares

•

There are no outstanding claims against your account

•

There are no transaction limitations on your account

•

Your request includes a signature guarantee if you:

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Are selling over $100,000 or exchanging over $500,000 worth of shares

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Changed your account registration or address within the last 30 days

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Instruct the transfer agent to mail the check to an address different from the one on your account

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Want the check paid to someone other than the account's record owner(s)

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Are transferring the sale proceeds to a Pioneer mutual fund account with a different registration

Transaction limitations

Your transactions are subject to certain limitations, including the limitation on the purchase of the fund's shares within 30 calendar days of a redemption. See "Excessive trading."

Buying

You may buy fund shares from any financial intermediary that has a sales agreement or other arrangement with the distributor.

You can buy shares at net asset value per share plus any applicable sales charge. The distributor may reject any order until it has confirmed the order in writing and received payment. Normally, your financial intermediary will send your purchase request to the fund's transfer agent. Consult your investment professional for more information.Your investment firm receives a commission from the distributor, and may receive additional compensation from Amundi US, for your purchase of fund shares.

Minimum investment amounts

Class A shares

Your initial investment must be at least $1,000. Additional investments must be at least $100 for Class A shares.

You may qualify for lower initial or subsequent investment minimums if you are establishing an automatic investment plan or placing your trade through your investment firm. The fund may waive the initial or subsequent investment minimums. Minimum investment amounts may be waived for, among other things, share purchases made through certain mutual fund programs (e.g., asset based fee program accounts) sponsored by qualified intermediaries, such as broker-dealers and investment advisers, that have entered into an agreement with Amundi US.

Class R shares

There is no minimum investment amount for Class R shares, although investments are subject to the fund's policies regarding small accounts.

Class Y shares

Your initial investment in Class Y shares must be at least $5 million. This amount may be invested in one or more of the Pioneer mutual funds that currently offer Class Y shares. There is no minimum additional investment amount. The fund may waive the initial investment amount.

Waivers of the minimum investment amount for Class Y

The fund will accept an initial investment of less than $5 million if:

(a)

The investment is made by a trust company or bank trust department which is initially investing at least $1 million in any of the Pioneer mutual funds and, at the time of the purchase, such assets are held in a fiduciary, advisory, custodial or similar capacity over which the trust company or bank trust department has full or shared investment discretion; or

(b)

The investment is at least $1 million in any of the Pioneer mutual funds and the purchaser is an insurance company separate account; or

(c)

The account is not represented by a broker-dealer and the investment is made by (1) an ERISA-qualified retirement plan that meets the requirements of Section 401 of the Internal Revenue Code, (2) an employer-sponsored retirement plan that meets the requirements of Sections 403 or 457 of the Internal Revenue Code, (3) a private foundation that meets the requirements of Section 501(c)(3) of the Internal Revenue Code or (4) an endowment or other organization that meets the requirements of Section 509(a)(1) of the Internal Revenue Code; or

(d)

The investment is made by an employer-sponsored retirement plan established for the benefit of (1) employees of Amundi US or its affiliates, or (2) employees or the affiliates of broker-dealers who have a Class Y shares sales agreement with the distributor; or

(e)

The investment is made through certain mutual fund programs sponsored by qualified intermediaries, such as broker-dealers and investment advisers. In each case, the intermediary has an arrangement with Amundi US to include Class Y shares of the Pioneer mutual funds in its program. In one model, the intermediary provides investors participating in the program with additional services, including advisory, asset allocation, recordkeeping or other services, as a combined service offering. In another model, a brokerage firm may provide transactional services in accordance with a commission schedule set by the firm.

Buying, exchanging and selling shares

You should ask your investment firm if it offers and you are eligible to participate in such a mutual fund program and whether participation in the program is consistent with your investment goals. The intermediaries sponsoring or participating in these mutual fund programs also may offer their clients other classes of shares of the funds, and investors may receive different levels of services or pay different fees depending upon the class of shares included in the program. Investors should consider carefully any separate transaction and other fees charged by these programs in connection with investing in each available share class before selecting a share class; or

(f)

The investment is made by another fund in the Pioneer Funds mutual fund complex.

The fund reserves the right to waive the initial investment minimum in other circumstances.

Maximum purchase amounts

Class A, Class R and Class Y shares are not subject to a maximum purchase amount.

Retirement plan accounts

You can purchase fund shares through tax-deferred retirement plans for individuals, businesses and tax-exempt organizations.

Your initial investment for most types of retirement plan accounts must be at least $1,000. Additional investments for most types of retirement plans must be at least $100.

You may not use the account application accompanying this prospectus to establish an Amundi US retirement plan. You can obtain retirement plan applications from your investment firm or by calling the Retirement Plans Department at 1-800-622-0176.

How to buy shares

Through your investment firm

Normally, your investment firm will send your purchase request to the fund's distributor and/or transfer agent. Consult your investment professional for more information.Your investment firm receives a commission from the distributor, and may receive additional compensation from Amundi US, for your purchase of fund shares.

By phone or online

You can use the telephone or online purchase privilege ifyou have an existing non-retirement account. Certain IRAs can use the telephone purchase privilege. If your account is eligible, you can purchase additional fund shares by phone or online if:

•

You established your bank account of record at least 30 days ago

•

Your bank information has not changed for at least 30 days

•

You are not purchasing more than $100,000 worth of shares per account per day

•

You can provide the proper account identification information

When you request a telephone or online purchase, the fund's transfer agent will electronically debit the amount of the purchase from your bank account of record. The fund's transfer agent will purchase fund shares for the amount of the debit at the offering price determined after the fund's transfer agent receives your telephone or online purchase instruction and good funds. It usually takes three business days for the fund's transfer agent to receive notification from your bank that good funds are available in the amount of your investment.

In writing, by mail

You can purchase fund shares for an existing fund account by mailing a check to the fund. Make your check payable to the fund. Neither initial nor subsequent investments should be made by third party check, travelers check, or credit card check. Your check must be in U.S. dollars and drawn on a U.S. bank. Include in your purchase request the fund's name, the account number and the name or names in the account registration. Please note that there may be a delay in receipt by the fund's transfer agent of purchase orders submitted by regular mail to a post office address.

By wire (Class Y shares only)

If you have an existing (Class Y shares only) account, you may wire funds to purchase shares. Note, however, that:

•

BNY Mellon must receive your wire no later than 11:00 a.m. Eastern time on the business day after the fund receives your request to purchase shares

•

If BNY Mellon does not receive your wire by 11:00 a.m. Eastern time on the next business day, your transaction will be canceled at your expense and risk

•

Wire transfers normally take two or more hours to complete and a fee may be charged by the sending bank

•

Wire transfers may be restricted on holidays and at certain other times

Buying, exchanging and selling shares

Instruct your bank to wire funds to:

Receiving Bank:	BNY Mellon, NA ABA Routing No. 011001234 BNY Mellon Investment Servicing (US) Inc. as agent FBO Amundi US Funds Consolidated Account Account 727296
For further credit to:	Shareholder Name Existing Pioneer Account No. U.S. Government Money Market Fund

The fund's transfer agent must receive your account application before you send your initial check or federal funds wire. In addition, you must provide a bank wire address of record when you establish your account.

Exchanging

You may, under certain circumstances, exchange your shares for shares of the same class of another Pioneer mutual fund.

Your exchange request must be for at least $1,000. The fund allows you to exchange your shares at net asset value without charging you either an initial or contingent deferred sales charge at the time of the exchange. Shares you acquire as part of an exchange will continue to be subject to any contingent deferred sales charge that applies to the shares you originally purchased. When you ultimately sell your shares, the date of your original purchase will determine your contingent deferred sales charge.

Before you request an exchange, consider each fund's investment objectives and policies as described in the fund's prospectus.

Same-fund exchange privilege

Certain shareholders may be eligible to exchange their shares for the fund's Class Y shares. If eligible, no sales charges or other charges will apply to any such exchange. Generally, shareholders will not recognize a gain or loss for federal income tax purposes upon such an exchange. Investors should contact their financial intermediary to learn more about the details of this privilege.

How to exchange shares

Through your investment firm

Normally, your investment firm will send your exchange request to the fund's transfer agent. Consult your investment professional for more information about exchanging your shares.

By phone or online

After you establish an eligible fund account, you can exchange fund shares by phone or online if:

•

You are exchanging into an existing account or using the exchange to establish a new account, provided the new account has a registration identical to the original account

•

The fund into which you are exchanging offers the same class of shares

•

You are not exchanging more than $500,000 worth of shares per account per day

•

You can provide the proper account identification information

In writing, by mail or by fax

You can exchange fund shares by mailing or faxing a letter of instruction to the fund.You can exchange fund shares directly through the fund only if your account is registered in your name. However, you may not fax an exchange request for more than $500,000. Include in your letter:

•

The name and signature of all registered owners

•

A signature guarantee for each registered owner if the amount of the exchange is more than $500,000

•

The name of the fund out of which you are exchanging and the name of the fund into which you are exchanging

•

The class of shares you are exchanging

•

The dollar amount or number of shares you are exchanging

Please note that there may be a delay in receipt by the fund's transfer agent of exchange requests submitted by regular mail to a post office address.

Selling

Your shares will be sold at the share price (net asset value less any applicable sales charge) next calculated after the fund or its authorized agent, such as a broker-dealer, receives your request in good order. If a signature guarantee is required, you must submit your request in writing.

If the shares you are selling are subject to a deferred sales charge, it will be deducted from the sale proceeds. The fund generally will send your sale proceeds by check, bank wire or electronic funds transfer. The fund generally will send your sale

Buying, exchanging and selling shares

proceeds by check, bank wire or funds transfer. Your redemption proceeds normally will be sent within 1 business day after your request is received in good order, but in any event within 7 days, regardless of the method the fund uses to make such payment. If you recently sent a check to purchase the shares being sold, the fund may delay payment of the sale proceeds until your check has cleared. This may take up to 10 calendar days from the purchase date.

There are special requirements if you wish to have your order executed at 1:00 p.m. and receive your redemption proceeds by wire that same day. You or your investment firm must contact the fund's transfer agent at 1-800-225-6292, to be pre-approved. You will not receive that day's dividend.

Your redemption proceeds may be delayed, or your right to receive redemption proceeds suspended, if the New York Stock Exchange is closed (other than on weekends or holidays) or trading is restricted, if the Securities and Exchange Commission determines an emergency or other circumstances exist that make it impracticable for the fund to sell or value its portfolio securities, or otherwise as permitted by the rules of or by the order of the Securities and Exchange Commission.

If you are selling shares from a non-retirement account or certain IRAs, you may use any of the methods described below. If you are selling shares from a retirement account other than an IRA, you must make your request in writing.

If you must use a written request to exchange or sell your shares and your account is registered in the name of a corporation or other fiduciary you must include the name of an authorized person and a certified copy of a current corporate resolution, certificate of incumbency or similar legal document showing that the named individual is authorized to act on behalf of the record owner.

Under normal circumstances, the fund expects to meet redemption requests by using cash or cash equivalents in its portfolio and/or selling portfolio assets to generate cash.

The fund reserves the right to redeem in kind, that is, to pay all or a portion of your redemption proceeds by giving you securities. If the fund redeems in kind, it generally will deliver to you a proportionate share of the portfolio securities owned by the fund. Securities you receive this way may increase or decrease in value while you hold them and you may incur brokerage and transaction charges and tax liability when you convert the securities to cash. The fund may redeem in kind at a shareholder's request or if, for example, if the fund reasonably believes that a cash redemption may have a substantial impact on the fund and its remaining shareholders.

During periods of deteriorating or stressed market conditions, or during extraordinary or emergency circumstances, the fund may be more likely to pay redemption proceeds by giving you securities.

How to sell shares

Through your investment firm

Normally, your investment firm will send your request to sell shares to the fund's transfer agent. Please note that your investment firm may have its own earlier deadlines for the receipt of a request to sell shares. Consult your investment professional for more information.The fund has authorized the distributor to act as its agent in the repurchase of fund shares from qualified investment firms. The fund reserves the right to terminate this procedure at any time.

By phone or online

If you have an eligible non-retirement account, you may sell up to $100,000 per account per day by phone or online.You may sell fund shares held in a retirement plan account by phone only if your account is an eligible IRA (tax penalties may apply). You may not sell your shares by phone or online if you have changed your address (for checks) or your bank information (for wires and transfers) in the last 30 days.

You may receive your sale proceeds:

•

By check, provided the check is made payable exactly as your account is registered

•

By bank wire or by electronic funds transfer, provided the sale proceeds are being sent to your bank address of record

For Class Y shares, shareholders may sell up to $5 million per account per day if the proceeds are directed to your bank account of record ($100,000 per account per day if the proceeds are not directed to your bank account of record).

In writing, by mail or by fax

You can sell some or all of your fund shares by writing directly to the fund only if your account is registered in your name. Include in your request your name, the fund's name, your fund account number, the class of shares to be sold, the dollar amount or number of shares to be sold and any other applicable requirements as described below. The fund's transfer agent will send the sale proceeds to your address of record unless you provide other instructions. Your request must be signed by all registered owners and be in good order.

The fund's transfer agent will not process your request until it is received in good order.

You may sell up to $100,000 per account per day by fax.

Buying, exchanging and selling shares

Please note that there may be a delay in receipt by the fund's transfer agent of redemption requests submitted by regular mail to a post office address.

How to contact us

By phone

For information or to request a telephone transaction between 8:00 a.m. and 7:00 p.m. (Eastern time) by speaking with a shareholder services
representative call
1-800-225-6292

To request a transaction using FactFoneSMcall
1-800-225-4321

By mail

Send your written instructions to:
Pioneer Funds
P.O. Box 534427
Pittsburgh, PA 15253-4427

Amundi US website

amundi.com/us

By fax

Fax your exchange and sale requests to:
1-800-225-4240

Account options

See the account application form for more details on each of the following services or call the fund for details and availability.

Telephone transaction privileges

If your account is registered in your name, you can buy, exchange or sell fund shares by telephone. If you do not want your account to have telephone transaction privileges, you must indicate that choice on your account application or by writing to the fund.

When you request a telephone transaction the fund's transfer agent will try to confirm that the request is genuine. The transfer agent records the call, requires the caller to provide validating information for the account and sends you a written confirmation. The fund may implement other confirmation procedures from time to time. Different procedures may apply if you have a non-U.S. account or if your account is registered in the name of an institution, broker-dealer or other third party. If the fund's confirmation procedures are followed, neither the fund nor its agents will bear any liability for these transactions.

Online transaction privileges

If your account is registered in your name, you may be able to buy, exchange or sell fund shares online. Your investment firm may also be able to buy, exchange or sell your fund shares online.

To establish online transaction privileges:

•

For new accounts, complete the online section of the account application

•

For existing accounts, complete an account options form, write to the
fund or complete the online authorization screen at amundi.com/us

To use online transactions, you must read and agree to the terms of an online transaction agreement available on the Amundi US website. When you or your investment firm requests an online transaction, the fund's transfer agent electronically records the transaction, requires an authorizing password and sends a written confirmation. The fund may implement other procedures from time to time. Different procedures may apply if you have a non-U.S. account or if your account is registered in the name of an institution, broker-dealer or other third party. You may not be able to use the online transaction privilege for certain types of accounts, including most retirement accounts.

Account options

Periodic investments

You can make regular periodic investments in the fund by setting up monthly bank drafts, government allotments, payroll deductions, or an Automatic Investment Plan. Periodic investments may be made only through U.S. banks. You may use a periodic investment plan to establish a Class A share account with a small initial investment. If you have a Class R share account and your balance is at least $1,000, you may establish a periodic investment plan.

Automatic Investment Plan (AIP)

If you establish an Automatic Investment Plan with Amundi US, the fund's transfer agent will make a periodic investment in fund shares by means of a preauthorized electronic funds transfer from your bank account. Your plan investments are voluntary. You may discontinue your plan at any time or change the plan's dollar amount, frequency or investment date by calling or writing to the fund's transfer agent. You should allow up to 30 days for the fund's transfer agent to establish your plan.

Automatic exchanges

You can automatically exchange your fund shares for shares of the same class of another fund in the Pioneer Funds mutual fund complex. The automatic exchange will begin on the day you select when you complete the appropriate section of your account application or an account options form. In order to establish automatic exchange:

•

You must select exchanges on a monthly or quarterly basis

•

Both the originating and receiving accounts must have identical registrations

•

The originating account must have a minimum balance of $5,000

You may have to pay income taxes on an exchange.

Distribution options

The fund offers three distribution options. Any fund shares you buy by reinvesting distributions will be priced at the applicable net asset value per share.

(1)

Unless you indicate another option on your account application, any dividends and capital gain distributions paid to you by the fund will automatically be invested in additional fund shares.

(2)

You may elect to have the amount of any dividends paid to you in cash and any capital gain distributions reinvested in additional shares.

(3)

You may elect to have the full amount of any dividends and/or capital gain distributions paid to you in cash.

Options (2) and (3) are not available to retirement plan accounts or accounts with a current value of less than $500. When electing a cash distribution option, you may only select one destination for the cash distribution portion (i.e., bank account or directed to another mutual fund). The other distribution portion must be reinvested into your current mutual fund account or follow the same cash election.

If you are under 59½, taxes and tax penalties may apply.

If your distribution check is returned to the fund's transfer agent or you do not cash the check for six months or more, the fund's transfer agent may reinvest the amount of the check in your account and automatically change the distribution option on your account to option (1) until you request a different option in writing. If the amount of a distribution check would be less than $25, the fund may reinvest the amount in additional shares of the fund instead of sending a check. Additional shares of the fund will be purchased at the then-current net asset value.

Directed dividends

You can invest the dividends paid by one of your Pioneer mutual fund accounts in a second Pioneer mutual fund account. The value of your second account must be at least $1,000. You may direct the investment of any amount of dividends. There are no fees or charges for directed dividends.

Systematic withdrawal plans

When you establish a systematic withdrawal plan for your account, the transfer agent will sell the number of fund shares you specify on a periodic basis and the proceeds will be paid to you or to any person you select. You must obtain a signature guarantee to direct payments to another person after you have established your systematic withdrawal plan. Payments can be made either by check or by electronic transfer to a U.S. bank account you designate.

To establish a systematic withdrawal plan:

•

Your account must have a total value of at least $10,000 when you establish your plan

•

You must request a periodic withdrawal of at least $50

•

You may not request a periodic withdrawal of more than 10% of the value of any Class R share account (valued at the time the plan is implemented)

These requirements do not apply to scheduled (Internal Revenue Code Section 72(t) election) or mandatory (required minimum distribution) withdrawals from IRAs and certain retirement plans.

Account options

Systematic sales of fund shares may be taxable transactions for you. While you are making systematic withdrawals from your account, you may pay unnecessary initial sales charges on additional purchases of Class A shares or contingent deferred sales charges.

Direct deposit

If you elect to take dividends or dividends and capital gain distributions in cash, or if you establish a systematic withdrawal plan, you may choose to have those cash payments deposited directly into your savings, checking or NOW bank account.

Voluntary tax withholding

You may have the fund's transfer agent withhold 28% of the dividends and capital gain distributions paid from your fund account (before any reinvestment) and forward the amount withheld to the Internal Revenue Service as a credit against your federal income taxes. Voluntary tax withholding is not available for retirement plan accounts or for accounts subject to backup withholding.

Shareholder services and policies

Excessive trading

Frequent trading into and out of the fund can disrupt portfolio management strategies, harm fund performance by forcing the fund to hold excess cash or to liquidate certain portfolio securities prematurely and increase expenses for all investors, including long-term investors who do not generate these costs. An investor may use short-term trading as a strategy, for example, if the investor believes that the valuation of the fund's portfolio securities for purposes of calculating its net asset value does not fully reflect the then-current fair market value of those holdings. The fund discourages, and does not take any intentional action to accommodate, excessive and short-term trading practices, such as market timing. Although there is no generally applied standard in the marketplace as to what level of trading activity is excessive, we may consider trading in the fund's shares to be excessive for a variety of reasons, such as if:

•

You sell shares within 30 days after the shares were purchased;

•

You make two or more purchases and redemptions within a short period of time;

•

You enter into a series of transactions that indicate a timing pattern or strategy; or

•

We reasonably believe that you have engaged in such practices in connection with other mutual funds.

The fund's Board of Trustees has adopted policies and procedures with respect to frequent purchases and redemptions of fund shares by fund investors. Pursuant to these policies and procedures, we monitor selected trades on a daily basis in an effort to detect excessive short-term trading. If we determine that an investor or a client of a broker or other intermediary has engaged in excessive short-term trading that we believe may be harmful to the fund, we will ask the investor, broker or other intermediary to cease such activity and we will refuse to process purchase orders (including purchases by exchange) of such investor, broker, other intermediary or accounts that we believe are under their control. In determining whether to take such actions, we seek to act in a manner that is consistent with the best interests of the fund's shareholders.

While we use our reasonable efforts to detect excessive trading activity, there can be no assurance that our efforts will be successful or that market timers will not employ tactics designed to evade detection. If we are not successful, your return from an investment in the fund may be adversely affected. Frequently, fund shares are held through omnibus accounts maintained by financial intermediaries such as brokers and retirement plan administrators, where the holdings of multiple shareholders, such as all the clients of a particular broker or other intermediary, are aggregated. Our ability to monitor trading practices by investors purchasing shares through omnibus accounts may be limited and dependent upon the cooperation of the broker or other intermediary in taking steps to limit this type of activity.

Shareholder services and policies

The fund may reject a purchase or exchange order before its acceptance or the issuance of shares. The fund may also restrict additional purchases or exchanges in an account. Each of these steps may be taken for any transaction, for any reason, without prior notice, including transactions that the fund believes are requested on behalf of market timers. The fund reserves the right to reject any purchase or exchange request by any investor or financial institution if the fund believes that any combination of trading activity in the account or related accounts is potentially disruptive to the fund. A prospective investor whose purchase or exchange order is rejected will not achieve the investment results, whether gain or loss, that would have been realized if the order had been accepted and an investment made in the fund. A fund and its shareholders do not incur any gain or loss as a result of a rejected order. The fund may impose further restrictions on trading activities by market timers in the future.

To limit the negative effects of excessive trading on the fund, the fund has adopted the following restriction on investor transactions. If an investor redeems $5,000 or more (including redemptions that are a part of an exchange transaction) from the fund, that investor shall be prevented (or "blocked") from purchasing shares of the fund (including purchases that are a part of an exchange transaction) for 30 calendar days after the redemption. This policy does not apply to systematic purchase or withdrawal plan transactions, transactions made through employer-sponsored retirement plans described under Section 401(a), 403(b) or 457 of the Internal Revenue Code or employee benefit plans, scheduled (Internal Revenue Code Section 72(t) election) or mandatory (required minimum distribution) withdrawals from IRAs, rebalancing transactions made through certain asset allocation or "wrap" programs, transactions by insurance company separate accounts or transactions by other funds that invest in the fund. This policy does not apply to purchase or redemption transactions of less than $5,000 or to Pioneer U.S. Government Money Market Fund or Pioneer Multi-Asset Ultrashort Income Fund.

We rely on financial intermediaries that maintain omnibus accounts to apply to their customers either the fund's policy described above or their own policies or restrictions designed to limit excessive trading of fund shares. However, we do not impose this policy at the omnibus account level.

Purchases pursuant to the reinstatement privilege (for Class A shares) are subject to this policy.

Purchases in kind

You may use securities you own to purchase shares of the fund provided that Amundi US, in its sole discretion, determines that the securities are consistent with the fund's objectives and policies and their acquisition is in the best interests of the fund. If the fund accepts your securities, they will be valued for purposes of determining the number of fund shares to be issued to you in the same way the fund will value the securities for purposes of determining its net asset value. For federal income tax purposes, you may be taxed in the same manner as if you sold the securities that you use to purchase fund shares for cash in an amount equal to the value of the fund shares that you purchase. Your broker may also impose a fee in connection with processing your purchase of fund shares with securities.

Reinstatement privilege (Class A shares)

If you recently sold all or part of your Class A shares, you may be able to reinvest all or part of your sale proceeds without a sales charge in Class A shares of any Pioneer mutual fund. To qualify for reinstatement:

•

You must send a written request to the fund no more than 90 days after selling your shares and

•

The registration of the account in which you reinvest your sale proceeds must be identical to the registration of the account from which you sold your shares.

Purchases pursuant to the reinstatement privilege are subject to limitations on investor transactions, including the limitation on the purchase of the fund's shares within 30 calendar days of redemption. See "Excessive trading."

When you elect reinstatement, you are subject to the provisions outlined in the selected fund's prospectus, including the fund's minimum investment requirement. Your sale proceeds will be reinvested in shares of the fund at the Class A net asset value per share determined after the fund receives your written request for reinstatement. You may realize a gain or loss for federal income tax purposes as a result of your sale of fund shares, and special tax rules may apply if you elect reinstatement. Consult your tax adviser for more information.

Amundi US website
amundi.com/us

The website includes a full selection of information on mutual fund investing. You can also use the website to get:

•

Your current account information

•

Prices, returns and yields of all publicly available Pioneer mutual funds

•

Prospectuses, statements of additional information and shareowner reports for all the Pioneer mutual funds

Shareholder services and policies

•

A copy of Amundi US's privacy notice

If you or your investment firm authorized your account for the online transaction privilege, you may buy, exchange and sell shares online.

FactFoneSM1-800-225-4321

You can use FactFoneSMto:

•

Obtain current information on your Pioneer mutual fund accounts

•

Inquire about the prices of all publicly available Pioneer mutual funds

•

Make computer-assisted telephone purchases, exchanges and redemptions for your fund accounts

•

Request account statements

If you plan to use FactFoneSMto make telephone purchases and redemptions, first you must activate your personal identification number and establish your bank account of record. If your account is registered in the name of a broker-dealer or other third party, you may not be able to use FactFoneSM to obtain account information.

Household delivery of fund documents

With your consent, Amundi US may send a single proxy statement, prospectus and shareowner report to your residence for you and any other member of your household who has an account with the fund. If you wish to revoke your consent to this practice, you may do so by notifying Amundi US, by phone or in writing (see "How to contact us"). Amundi US will begin mailing separate proxy statements, prospectuses and shareowner reports to you within 30 days after receiving your notice.

Confirmation statements

The fund's transfer agent maintains an account for each investment firm or individual shareowner and records all account transactions. You will be sent confirmation statements showing the details of your transactions as they occur, except automatic investment plan transactions, which are confirmed quarterly. If you have more than one Pioneer mutual fund account registered in your name, the Pioneer combined account statement will be mailed to you each quarter.

Tax information

Early each year, the fund will mail you information about the tax status of the dividends and distributions paid to you by the fund.

Tax information for IRA rollovers

In January (or by the applicable Internal Revenue Service deadline) following the year in which you take a reportable distribution, the fund's transfer agent will mail you a tax form reflecting the total amount(s) of distribution(s) received by the end of January.

Privacy

The fund has a policy designed to protect the privacy of your personal information. A copy of Amundi US's privacy notice was given to you at the time you opened your account. The fund will send you a copy of the privacy notice each year. You may also obtain the privacy notice by calling the fund or through Amundi US's website.

Signature guarantees and other requirements

You are required to obtain a signature guarantee when:

•

Requesting certain types of exchanges or sales of fund shares

•

Requesting certain types of changes for your existing account

You can obtain a signature guarantee from most broker-dealers, banks, credit unions (if authorized under state law) and federal savings and loan associations. You cannot obtain a signature guarantee from a notary public.

The Pioneer funds generally accept only medallion signature guarantees. A medallion signature guarantee may be obtained from a domestic bank or trust company, broker, dealer, clearing agency, savings association, or other financial institution that is participating in a medallion program recognized by the Securities Transfer Association. Signature guarantees from financial institutions that are not participating in one of these programs are not accepted as medallion signature guarantees. The fund may accept other forms of guarantee from financial intermediaries in limited circumstances.

Fiduciaries and corporations are required to submit additional documents to sell fund shares.

Minimum account size

The fund requires that you maintain a minimum account value of $500. If you hold less than $500 in your account, the fund reserves the right to notify you that it intends to sell your shares and close your account. You will be given 60 days from the date of the notice to make additional investments to avoid having your shares sold. This policy does not apply to certain qualified retirement plan accounts.

Shareholder services and policies

Telephone and website access

You may have difficulty contacting the fund by telephone or accessing amundi.com/us during times of market volatility or disruption in telephone or Internet service. On New York Stock Exchange holidays or on days when the exchange closes early, Amundi US will adjust the hours for the telephone center and for online transaction processing accordingly. If you are unable to access amundi.com/us or reach the fund by telephone, you should communicate with the fund in writing.

Share certificates

The fund does not offer share certificates. Shares are electronically recorded.

Reduction in number of shares

In order to maintain a $1.00 per share net asset value, if the value of the fund's assets were to decline, the fund could, if authorized by the Board, reduce the number of its outstanding shares through a reverse stock split. If this happens, although each share would continue to be valued at $1.00 per share, each shareholder will own fewer shares of the fund and lose money. The fund could do this in a negative interest rate environment. By investing in the fund, you agree to this reduction should it become necessary to maintain a $1.00 per share net asset value.

Other policies

The fund and the distributor reserve the right to:

•

reject any purchase or exchange order for any reason, without prior notice

•

charge a fee for exchanges or to modify, limit or suspend the exchange privilege at any time without notice. The fund will provide 60 days' notice of material amendments to or termination of the exchange privilege

•

revise, suspend, limit or terminate the account options or services available to shareowners at any time, except as required by the rules of the Securities and Exchange Commission

The fund reserves the right to:

•

charge transfer, shareholder servicing or similar agent fees, such as an account maintenance fee for small balance accounts, directly to accounts upon at least 30 days' notice. The fund may do this by deducting the fee from your distribution of dividends and/or by redeeming fund shares to the extent necessary to cover the fee

•

close your account after a period of inactivity, as determined by state law, and transfer your shares to the appropriate state

Dividends, capital gains and taxes

Dividends and capital gains

Each day the fund declares substantially all of its net investment income as a dividend to shareowners. Dividends are accrued each day and paid on the last business day of the month. The fund generally pays any distributions of net short-term capital gains in November. The fund does not anticipate making any distributions of net long-term capital gains. The fund may also pay dividends and distributions at other times if necessary for the fund to avoid U.S. federal income or excise tax.

Taxes

You will normally have to pay federal income taxes, and any state or local taxes, on the dividends and other distributions you receive from the fund, whether you take the distributions in cash or reinvest them in additional shares. For U.S. federal income tax purposes, distributions from the fund's net capital gains (if any) are considered long-term capital gains and are generally taxable to noncorporate shareholders at reduced rates. Distributions from the fund's net short-term capital gains are generally taxable as ordinary income. Other dividends are taxable as ordinary income.

Since the fund's income is derived from sources that do not pay dividends, it is not expected that any portion of dividends paid by the fund will qualify for either the dividends-received deduction for corporations or any favorable U.S. federal income tax rate available to noncorporate shareholders on "qualified dividend income."

The fund will report to shareholders annually the U.S. federal income tax status of all fund distributions.

If the fund declares a dividend in October, November or December, payable to shareholders of record in such a month, and pays it in January of the following year, you will be taxed on the dividend as if you received it in the year in which it was declared.

When you sell or exchange fund shares it is generally considered a taxable event, but you will generally not have any gain or loss on the sale or exchange so long as the fund maintains a net asset value of $1.00 per share.

A 3.8% Medicare contribution tax generally applies to all or a portion of the net investment income of a shareholder who is an individual and not a nonresident alien for federal income tax purposes and who has adjusted gross income (subject to certain adjustments) that exceeds a threshold amount. This 3.8% tax also applies to all or a portion of the undistributed net investment income of certain shareholders

Dividends, capital gains and taxes

that are estates and trusts. For these purposes, dividends, interest and certain capital gains are generally taken into account in computing a shareholder's net investment income.

You must provide your social security number or other taxpayer identification number to the fund along with the certifications required by the Internal Revenue Service when you open an account. If you do not or if it is otherwise legally required to do so, the fund will apply "backup withholding" tax on your dividends and other distributions and any other payments to you that are subject to backup withholding. The backup withholding rate is currently 24%.

Shareholders that are exempt from U.S. federal income tax, such as retirement plans that are qualified under Section 401 of the Internal Revenue Code, generally are not subject to U.S. federal income tax on fund dividends or other distributions or on sales or exchanges of fund shares. However, in the case of fund shares held through a nonqualified deferred compensation plan, fund dividends and other distributions received by the plan and sales and exchanges of fund shares by the plan generally will be taxable to the employer sponsoring such plan in accordance with U.S. federal income tax laws that are generally applicable to shareholders receiving such dividends and other distributions from regulated investment companies such as the fund, or effecting such sales or exchanges.

Plan participants whose retirement plan invests in the fund generally are not subject to federal income tax on fund dividends or other distributions received by the plan or on sales or exchanges of fund shares by the plan. However, distributions to plan participants from a retirement plan generally are taxable to plan participants as ordinary income.

Distributions derived from interest on U.S. government obligations (but generally not distributions of gain from the sale of such obligations) may be exempt from certain state and local taxes.

You should ask your tax adviser about any federal, state, local and foreign tax considerations relating to an investment in the fund. You may also consult the fund's statement of additional information for a more detailed discussion of the U.S. federal income tax considerations that may affect the fund and its shareowners.

Financial highlights

The financial highlights table helps you understand the fund's financial performance for the past five years.

Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that you would have earned or lost on an investment in Class A, Class R and Class Y shares of the fund (assuming reinvestment of all dividends and distributions).

The information below has been audited by Ernst & Young LLP, independent registered public accounting firm, whose report is included in the fund's annual report along with the fund's financial statements. The fund's annual report is incorporated by reference in the statement of additional information and is available upon request.

Financial highlights

Pioneer U.S. Government Money Market Fund

	Year Ended 12/31/23	Year Ended 12/31/22	Year Ended 12/31/21	Year Ended 12/31/20	Year Ended 12/31/19
Class A
Net asset value, beginning of period	$1.00	$1.00	$1.00	$1.00	$1.00
Increase (decrease) from investment operations:
Net investment income (loss)(a)	$0.045	$0.015	$0.000(b)	$0.002	$0.015
Net realized and unrealized gain (loss) on investments	0.000	(0.001)	0.000(b)	0.000(b)	0.000(b)
Net increase (decrease) from investment operations	$0.045	$0.014	$0.000(b)	$0.002	$0.015
Distributions to shareholders:
Net investment income	$(0.045)	$(0.014)	$(0.000)(b)	$(0.002)(c)	$(0.015)(c)
Total distributions	$(0.045)	$(0.014)	$(0.000)(b)	$(0.002)	$(0.015)
Net increase (decrease) in net asset value	$0.00	$0.00	$0.00	$0.00	$0.00
Net asset value, end of period	$1.00	$1.00	$1.00	$1.00	$1.00
Total return (d)	4.61%	1.39%	0.02%	0.20%	1.50%
Ratio of net expenses to average net assets	0.55%	0.39%	0.04%	0.25%	0.69%
Ratio of net investment income (loss) to average net assets	4.52%	1.45%	0.03%	0.16%	1.50%
Net assets, end of period (in thousands)	$243,757	$265,715	$215,528	$257,214	$197,032
Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly:
Total expenses to average net assets	0.70%	0.65%	0.79%	0.79%	0.84%
Net investment income (loss) to average net assets	4.37%	1.19%	(0.72)%	(0.38)%	1.35%

(a)	The per-share data presented above is based on the average shares outstanding for the period presented.
(b)	Amount rounds to less than $0.001 or $(0.001) per share.
(c)	The amount of distributions made to shareholders during the period were in excess of the net investment income earned by the Fund during the period. A portion of the accumulated net investment income was distributed to sharehoders during the period.
(d)	Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period.

Pioneer U.S. Government Money Market Fund

	Year Ended 12/31/23	Year Ended 12/31/22	Year Ended 12/31/21	Year Ended 12/31/20	Year Ended 12/31/19
Class R
Net asset value, beginning of period	$1.00	$1.00	$1.00	$1.00	$1.00
Increase (decrease) from investment operations:
Net investment income (loss)(a)	$0.040	$0.012	$0.000(b)	$0.001	$0.010
Net realized and unrealized gain (loss) on investments	0.000	(0.001)	0.000(b)	0.000(b)	0.001
Net increase (decrease) from investment operations	$0.040	$0.011	$0.000(b)	$0.001	$0.011
Distributions to shareholders:
Net investment income	$(0.040)	$(0.011)	$(0.000)(b)	$(0.001)(c)	$(0.011)(c)
Total distributions	$(0.040)	$(0.011)	$(0.000)(b)	$(0.001)	$(0.011)
Net increase (decrease) in net asset value	$0.00	$0.00	$0.00	$0.00	$0.00
Net asset value, end of period	$1.00	$1.00	$1.00	$1.00	$1.00
Total return (d)	4.11%	1.07%	0.02%	0.12%	1.08%
Ratio of net expenses to average net assets	1.04%	0.72%	0.06%	0.30%	1.12%
Ratio of net investment income (loss) to average net assets	4.06%	1.17%	0.01%	0.09%	1.03%
Net assets, end of period (in thousands)	$2,442	$1,906	$1,585	$1,825	$885
Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly:
Total expenses to average net assets	1.06%	0.99%	1.11%	1.08%	1.12%
Net investment income (loss) to average net assets	4.04%	0.90%	(1.04)%	(0.69)%	1.03%

(a)	The per-share data presented above is based on the average shares outstanding for the period presented.
(b)	Amount rounds to less than $0.001 or $(0.001) per share.
(c)	The amount of distributions made to shareholders during the period were in excess of the net investment income earned by the Fund during the period. A portion of the accumulated net investment income was distributed to sharehoders during the period.
(d)	Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period.

Financial highlights

Pioneer U.S. Government Money Market Fund

	Year Ended 12/31/23	Year Ended 12/31/22	Year Ended 12/31/21	Year Ended 12/31/20	Year Ended 12/31/19
Class Y
Net asset value, beginning of period	$1.00	$1.00	$1.00	$1.00	$1.00
Increase (decrease) from investment operations:
Net investment income (loss)(a)	$0.046	$0.014	$0.000(b)	$0.002	$0.017
Net realized and unrealized gain (loss) on investments	0.000	0.000(b)	0.000(b)	0.000(b)	0.000(b)
Net increase (decrease) from investment operations	$0.046	$0.014	$0.000(b)	$0.002	$0.017
Distributions to shareholders:
Net investment income	$(0.046)	$(0.014)	$(0.000)(b)	$(0.002)(c)	$(0.017)(c)
Total distributions	$(0.046)	$(0.014)	$(0.000)(b)	$(0.002)	$(0.017)
Net increase (decrease) in net asset value	$0.00	$0.00	$0.00	$0.00	$0.00
Net asset value, end of period	$1.00	$1.00	$1.00	$1.00	$1.00
Total return (d)	4.67%	1.40%	0.02%	0.22%	1.67%
Ratio of net expenses to average net assets	0.50%	0.38%	0.05%	0.24%	0.52%
Ratio of net investment income (loss) to average net assets	4.58%	1.42%	0.02%	0.19%	1.66%
Net assets, end of period (in thousands)	$67,494	$62,204	$54,015	$48,542	$42,343
Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly:
Total expenses to average net assets	0.50%	0.46%	0.51%	0.53%	0.52%
Net investment income (loss) to average net assets	4.58%	1.34%	(0.44)%	(0.10)%	1.66%

(a)	The per-share data presented above is based on the average shares outstanding for the period presented.
(b)	Amount rounds to less than $0.001 or $(0.001) per share.
(c)	The amount of distributions made to shareholders during the period were in excess of the net investment income earned by the Fund during the period. A portion of the accumulated net investment income was distributed to sharehoders during the period.
(d)	Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period.

Notes

Pioneer U.S. Government Money Market Fund

You can obtain more free informationabout the fund from your investment firm or by writing to Pioneer Funds, 60 State Street, Boston, Massachusetts 02109. You may also call 1-800-225-6292for more information about the fund, to request copies of the fund's statement of additional information and shareowner reports, and to make other inquiries.

Visit our website

amundi.com/us

The fund makes available the statement of additional information and shareowner reports, free of charge, on the fund's website at amundi.com/us. You also may find other information and updates about Amundi US and the fund, including fund performance information and the fund's most recent net asset value, on the fund's website.

Shareowner reports

Annual and semiannual reports to shareowners, and quarterly reports filed with the Securities and Exchange Commission, provide additional information about the fund's investments. The annual report discusses market conditions and investment strategies that significantly affected the fund's performance during its last fiscal year.

Statement of additional information

The statement of additional information provides more detailed information about the fund.

The statement of additional information, dated May 1, 2024, as may be amended from time to time, and filed with the Securities and Exchange Commission, is incorporated by reference into this prospectus.

The fund's shareowner reports, prospectus and statement of additional information are available on the Securities and Exchange Commission's EDGAR database on the Commission's Internet site at https://www.sec.gov. Copies of this information may be obtained, after paying a duplicating fee, by electronic request at the following e-mail address: [email protected].

(Investment Company Act file no. 811-05099)


Amundi Distributor US, Inc. 60 State Street Boston, MA 02109 amundi.com/us	19293-21-0524 ©2024 Amundi Distributor US, Inc. Member SIPC

Amundi Asset Management US, Inc.
60 State Street
Boston, MA 02109
amundi.com/us

This is not part of the prospectus.

19293-21-0524
©2024 Amundi Distributor US, Inc.
Underwriter of Pioneer mutual funds
Member SIPC

Pioneer U.S. Government Money Market Fund

(Pioneer Money Market Trust)

60 State Street
Boston, Massachusetts 02109

Statement of Additional Information | May 1, 2024

Class A Shares	Class R Shares	Class Y Shares
PMTXX	PRXXX	PRYXX

This statement of additional information is not a prospectus. It should be read in conjunction with the fund's Class A, Class R and Class Y shares prospectus dated May 1, 2024, as supplemented or revised from time to time. A copy of the prospectus can be obtained free of charge by calling the fund at 1-800-225-6292 or by written request to the fund at 60 State Street, Boston, Massachusetts 02109. You can also obtain a copy of the prospectus from our website at: amundi.com/US. The fund's financial statementsfor the fiscal year ended December 31, 2023, including the independent registered public accounting firm's report thereon, are incorporated into this statement of additional information by reference.

Contents

1.	Fund history	1
2.	Investment policies, risks and restrictions	1
3.	Trustees and officers	11
4.	Investment adviser	21
5.	Principal underwriter and distribution plan	23
6.	Shareholder servicing/transfer agent	25
7.	Custodian and sub-administrator	25
8.	Independent registered public accounting firm	26
9.	Portfolio management	26
10.	Portfolio transactions	29
11.	Description of shares	30
12.	Sales charges	33
13.	Redeeming shares	36
14.	Telephone and online transactions	37
15.	Pricing of shares	38
16.	Tax status	39
17.	Financial statements	44
18.	Annual fee, expense and other information	44
19.	Appendix A - Description of Ratings	49
20.	Appendix B - Proxy voting policies and procedures	62

1. Fund history

The fund is a diversified open-end management investment company. The fund is a series of Pioneer Money Market Trust (the "Trust"), a Delaware statutory trust. The fund originally was organized as a series of a Massachusetts business trust on March 31, 1987 and was reorganized as a series of a Delaware statutory trust on March 30, 1995. On November 13, 2015, the fund changed its name from Pioneer Cash Reserves Fund to Pioneer U.S. Government Money Market Fund. Amundi Asset Management US, Inc. ("Amundi US") is the fund's investment adviser.

2. Investment policies, risks and restrictions

The prospectus presents the investment objective and the principal investment strategies and risks of the fund. This section supplements the disclosure in the fund's prospectus and provides additional information on the fund's investment policies or restrictions. Restrictions or policies stated as a maximum percentage of the fund's assets are only applied immediately after a portfolio investment to which the policy or restriction is applicable (other than the limitations on borrowing and illiquid securities). Accordingly, any later increase or decrease in a percentage resulting from a change in values, net assets or other circumstances will not be considered in determining whether the investment complies with the fund's restrictions and policies.

Debt securities and related investments

Money market fund matters

The fund is a government money market fund, meaning that it will invest at least 99.5% of its total assets in U.S. government securities, cash and/or repurchase agreements that are fully collateralized by U.S. government securities and cash. In addition, the fund will invest at least 80% of its net assets in U.S. government securities and/or repurchase agreements that are fully collateralized by U.S. government securities. The fund invests in accordance with the credit quality, diversification, liquidity and maturity requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended (the "1940 Act").

The fund seeks to invest in securities that present minimal credit risks to the fund.

The fund will maintain a dollar-weighted average portfolio maturity of 60 days or less and will limit its investments to securities that have remaining maturities of 397 calendar days or less or other features that shorten maturities in a manner consistent with the requirements of Rule 2a-7, such as interest rate reset and demand features.

U.S. government securities

U.S. government securities in which the fund invests include debt obligations of varying maturities issued by the U.S. Treasury or issued or guaranteed by an agency, authority or instrumentality of the U.S. government, including the Federal Housing Administration, Federal Financing Bank, Farm Service Agency, Export-Import Bank of the U.S., Small Business Administration, Government National Mortgage Association ("GNMA"), General Services Administration, National Bank for Cooperatives, Federal Farm Credit Banks, Federal Home Loan Banks ("FHLBs"), Federal Home Loan Mortgage Corporation ("FHLMC"), Federal National Mortgage Association ("FNMA"), Maritime Administration, Tennessee Valley Authority and various institutions that previously were or currently are part of the Farm Credit System (which has been undergoing reorganization since 1987). Some U.S. government securities, such as U.S. Treasury bills, Treasury notes and Treasury bonds, which differ only in their interest rates, maturities and times of issuance, are supported by the full faith and credit of the United States. Others are supported by: (i) the right of the issuer to borrow from the U.S. Treasury, such as securities of the FHLBs; (ii) the discretionary authority of the U.S. government to purchase the agency's obligations, such as securities of FNMA; or (iii) only the credit of the issuer. Such debt securities are subject to the risk of default on the payment of interest and/or principal, similar to debt of private issuers. The maximum potential liability of some U.S. government securities may greatly exceed their current resources, including any legal right to support from the U.S. government. Although the U.S. government provided financial support to FNMA and FHLMC in the past, no assurance can be given that the U.S. government will provide financial support in the future to these or other U.S. government agencies, authorities or instrumentalities that are not supported by the full faith and credit of the United States. Securities guaranteed as to principal and interest by the U.S. government, its agencies, authorities or instrumentalities include: (i) securities for which the payment of principal and interest is

backed by an irrevocable letter of credit issued by the U.S. government or any of its agencies, authorities or instrumentalities; and (ii) participations in loans made to non-U.S. governments or other entities that are so guaranteed. The secondary market for certain loan participations described above is limited and, therefore, the participations may be regarded as illiquid.

U.S. government securities may include zero coupon securities that may be purchased when yields are attractive and/or to enhance portfolio liquidity. Zero coupon U.S. government securities are debt obligations that are issued or purchased at a significant discount from face value. The discount approximates the total amount of interest the security will accrue and compound over the period until maturity or the particular interest payment date at a rate of interest reflecting the market rate of the security at the time of issuance. Zero coupon U.S. government securities do not require the periodic payment of interest. These investments may experience greater volatility in market value than U.S. government securities that make regular payments of interest. The fund accrues income on these investments for tax and accounting purposes, which is distributable to shareholders and which, because no cash is received at the time of accrual, may require the liquidation of other portfolio securities to satisfy the fund's distribution obligations, in which case the fund will forgo the purchase of additional income producing assets with these funds. Zero coupon U.S. government securities include STRIPS and CUBES, which are issued by the U.S. Treasury as component parts of U.S. Treasury bonds and represent scheduled interest and principal payments on the bonds.

Cybersecurity issues

With the increased use of technologies such as the Internet to conduct business, the fund is susceptible to operational, information security and related risks. In general, cyber incidents can result from deliberate attacks or unintentional events. Cyber attacks include, but are not limited to, attempts to gain unauthorized access to digital systems (e.g., through "hacking" or malicious software coding) for purposes of misappropriating assets or sensitive information, corrupting data, denying access, or causing other operational disruption. Cyber attacks may also be carried out in a manner that does not require gaining unauthorized access, such as causing denial-of-service attacks on websites (i.e., efforts to make network services unavailable to intended users). The fund's service providers regularly experience such attempts, and expect they will continue to do so. The fund is unable to predict how any such attempt, if successful, may affect the fund and its shareholders. While the fund's adviser has established business continuity plans in the event of, and risk management systems to prevent, limit or mitigate, such cyber attacks, there are inherent limitations in such plans and systems including the possibility that certain risks have not been identified. Furthermore, the fund cannot control the cybersecurity plans and systems put in place by service providers to the fund such as The Bank of New York Mellon ("BNY Mellon"), the fund's custodian and accounting agent, and BNY Mellon Investment Servicing (US) Inc., the fund's transfer agent. In addition, many beneficial owners of fund shares hold them through accounts at broker-dealers, retirement platforms and other financial market participants over which neither the fund nor Amundi US exercises control. Each of these may in turn rely on service providers to them, which are also subject to the risk of cyber attacks. Cybersecurity failures or breaches at Amundi US or the fund's service providers or intermediaries have the ability to cause disruptions and impact business operations potentially resulting in financial losses, interference with the fund's ability to calculate its NAV, impediments to trading, the inability of fund shareholders to effect share purchases, redemptions or exchanges or receive distributions, loss of or unauthorized access to private shareholder information and violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, or additional compliance costs. Such costs and losses may not be covered under any insurance. In addition, maintaining vigilance against cyber attacks may involve substantial costs over time, and system enhancements may themselves be subject to cyber attacks.

Natural disasters

Certain areas of the world, including areas within the United States, historically have been prone to natural disasters, such as hurricanes, earthquakes, typhoons, flooding, tidal waves, tsunamis, erupting volcanoes, wildfires or droughts. Such disasters, and the resulting damage, could have a significant adverse impact on the economies of those areas and on the ability of issuers in which the fund invests to conduct their businesses, and thus on the investments made by the fund in such geographic areas and/or issuers. Adverse weather conditions could have a significant adverse impact on issuers in the agricultural sector and on insurance companies that insure against the impact of natural disasters.

Investment company securities

Other investment companies

The fund may invest in the securities of other investment companies to the extent that such investments are consistent with the fund's investment objective and policies and permissible under the Investment Company Act of 1940, as amended (the "1940 Act") and the rules thereunder. Investing in other investment companies subjects the fund to the risks of investing in the underlying securities held by those investment companies. The fund, as a holder of the securities of other investment companies, will bear its pro rata portion of the other investment companies' expenses, including advisory fees. These expenses are in addition to the direct expenses of the fund's own operations.

Other investments and investment techniques

Short-term investments

For temporary defensive or cash management purposes, the fund may invest in all types of short-term investments including, but not limited to, (a) commercial paper and other short-term commercial obligations; (b) obligations (including certificates of deposit and bankers' acceptances) of banks; (c) obligations issued or guaranteed by a governmental issuer, including governmental agencies or instrumentalities; (d) fixed income securities of non-governmental issuers; (e) money market funds; and (f) other cash equivalents or cash. Subject to the fund's restrictions regarding investment in non-U.S. securities, these securities may be denominated in any currency. Although these investments generally are rated investment grade or are determined by Amundi US to be of equivalent credit quality, the fund may also invest in these instruments if they are rated below investment grade in accordance with its investment objective, policies and restrictions.

Illiquid securities

The fund may invest up to 5% of its total assets in illiquid and other securities that are not readily marketable. If due to subsequent fluctuations in value or any other reasons, the value of the fund's illiquid securities exceeds this percentage limitation, the fund will consider what actions, if any, are necessary to maintain adequate liquidity. Repurchase agreements maturing in more than seven days will be included for purposes of the foregoing limit. Securities subject to restrictions on resale under the Securities Act of 1933, as amended (the "1933 Act"), are considered illiquid unless they are eligible for resale pursuant to Rule 144A or another exemption from the registration requirements of the 1933 Act and are determined to be liquid by Amundi US. Amundi US determines the liquidity of Rule 144A and other restricted securities according to procedures adopted by the Board of Trustees. Under the direction of the Board of Trustees, Amundi US monitors the application of these guidelines and procedures. The inability of the fund to dispose of illiquid investments readily or at reasonable prices could impair the fund's ability to raise cash for redemptions or other purposes. If the fund sold restricted securities other than pursuant to an exception from registration under the 1933 Act such as Rule 144A, it may be deemed to be acting as an underwriter and subject to liability under the 1933 Act.

Repurchase agreements

The fund may enter into repurchase agreements with broker-dealers, member banks of the Federal Reserve System and other financial institutions. Repurchase agreements are arrangements under which the fund purchases securities and the seller agrees to repurchase the securities within a specific time and at a specific price. The repurchase price is generally higher than the fund's purchase price, with the difference being income to the fund. A repurchase agreement may be considered a loan by the fund collateralized by securities. Under the direction of the Board of Trustees, Amundi US reviews and monitors the creditworthiness of any institution which enters into a repurchase agreement with the fund. The counterparty's obligations under the repurchase agreement are collateralized with U.S. Treasury and/or agency obligations with a market value of not less than 100% of the obligations, valued daily. Collateral is held by the fund's custodian in a segregated, safekeeping account for the benefit of the fund. Repurchase agreements afford the fund an opportunity to earn income on temporarily available cash. In the event of commencement of bankruptcy or insolvency proceedings with respect to the seller of the security before repurchase of the security under a repurchase agreement, the fund may encounter delay and incur costs before being able to sell the security. Such a delay may involve loss of interest or a decline in price of the security. If the court characterizes the transaction as a loan and the fund has not perfected a security interest in the security, the fund may be required to return the security to the seller's

estate and be treated as an unsecured creditor of the seller. As an unsecured creditor, the fund would be at risk of losing some or all of the principal and interest involved in the transaction. There is no specific limit on the fund's ability to enter into repurchase agreements. The SEC frequently treats repurchase agreements as loans for purposes of the 1940 Act.

Reverse repurchase agreements

Reverse repurchase agreements involve the sale of securities to a bank or other institution with an agreement that the fund will buy back the securities at a fixed future date at a fixed price plus an agreed amount of "interest" which may be reflected in the repurchase price. Reverse repurchase agreements involve the risk that the market value of securities purchased by the fund with proceeds of the transaction may decline below the repurchase price of the securities sold by the fund that it is obligated to repurchase. The fund will also continue to be subject to the risk of a decline in the market value of the securities sold under the agreements because it will reacquire those securities upon effecting their repurchase. Reverse repurchase agreements may be considered to be a type of borrowing. The fund may enter into reverse repurchase agreements provided that the fund maintains asset coverage of at least 300% of the value of the reverse repurchase agreement in accordance with Section 18 of the 1940 Act.

Lending of portfolio securities

The fund may lend portfolio securities to registered broker-dealers or other institutional investors deemed by Amundi US to be of good standing under agreements which require that the loans be secured continuously by collateral in the form of cash, cash equivalents, U.S. Government securities or irrevocable letters of credit issued by banks approved by the fund. The value of the collateral is monitored on a daily basis and the borrower is required to maintain the collateral at an amount at least equal to the market value of the securities loaned. The fund continues to receive the equivalent of the interest or dividends paid by the issuer on the securities loaned and continues to have all of the other risks associated with owning the securities. Where the collateral received is cash, the cash will be invested and the fund will be entitled to a share of the income earned on the investment, but will also be subject to investment risk on the collateral and will bear the entire amount of any loss in connection with investment of such collateral. The fund may pay administrative and custodial fees in connection with loans of securities and, where the collateral received is cash, the fund may pay a portion of the income earned on the investment of collateral to the borrower, lending agent or other intermediary. Fees and expenses paid by the fund in connection with loans of securities are not reflected in the fee table or expense example in the fund's prospectus. If the income earned on the investment of the cash collateral is insufficient to pay these amounts or if the value of the securities purchased with such cash collateral declines, the fund may take a loss on the loan. Where the fund receives securities as collateral, the fund will earn no income on the collateral, but will earn a fee from the borrower. The fund reserves the right to recall loaned securities so that it may exercise voting rights on loaned securities according to the fund's Proxy Voting Policies and Procedures.

The risk in lending portfolio securities, as with other extensions of credit, consists of the possibility of loss to the fund due to (i) the inability of the borrower to return the securities, (ii) a delay in receiving additional collateral to adequately cover any fluctuations in the value of securities on loan, (iii) a delay in recovery of the securities, or (iv) the loss of rights in the collateral should the borrower fail financially. In addition, as noted above, the fund continues to have market risk and other risks associated with owning the securities on loan. Where the collateral delivered by the borrower is cash, the fund will also have the risk of loss of principal and interest in connection with its investment of collateral. If a borrower defaults, the value of the collateral may decline before the fund can dispose of it. The fund will lend portfolio securities only to firms that have been approved in advance by Amundi US, which will monitor the creditworthiness of any such firms. However, this monitoring may not protect the fund from loss. At no time would the value of the securities loaned exceed 331∕3% of the value of the fund's total assets.

Interfund lending

To satisfy redemption requests or to cover unanticipated cash shortfalls, a Pioneer fund may enter into lending agreements ("Interfund Lending Agreements") under which the fund would lend money and borrow money for temporary purposes directly to and from another Pioneer fund through a credit facility ("Interfund Loan"), subject to meeting the conditions of an SEC exemptive order granted to the funds permitting such interfund lending. All Interfund Loans will consist only of uninvested cash reserves that the fund otherwise would invest in short-term repurchase agreements or other short-term instruments. The fund may participate as a lending fund in the interfund lending credit facility but will not participate as a borrowing fund.

If a fund has outstanding borrowings, any Interfund Loans to the fund (a) will be at an interest rate equal to or lower than any outstanding bank loan, (b) will be secured at least on an equal priority basis with at least an equivalent percentage of collateral to loan value as any outstanding bank loan that requires collateral, (c) will have a maturity no longer than any outstanding bank loan (and in any event not over seven days) and (d) will provide that, if an event of default occurs under any agreement evidencing an outstanding bank loan to the fund, the event of default will automatically (without need for action or notice by the lending fund) constitute an immediate event of default under the Interfund Lending Agreement entitling the lending fund to call the Interfund Loan (and exercise all rights with respect to any collateral) and that such call will be made if the lending bank exercises its right to call its loan under its agreement with the borrowing fund.

A fund may make an unsecured borrowing through the credit facility if its outstanding borrowings from all sources immediately after the interfund borrowing total 10% or less of its total assets; provided, that if the fund has a secured loan outstanding from any other lender, including but not limited to another Pioneer fund, the fund's interfund borrowing will be secured on at least an equal priority basis with at least an equivalent percentage of collateral to loan value as any outstanding loan that requires collateral. If a fund's total outstanding borrowings immediately after an interfund borrowing would be greater than 10% of its total assets, the fund may borrow through the credit facility on a secured basis only. A fund may not borrow through the credit facility nor from any other source if its total outstanding borrowings immediately after the interfund borrowing would be more than 331∕3% of its total assets.

No fund may lend to another fund through the interfund lending credit facility if the loan would cause its aggregate outstanding loans through the credit facility to exceed 15% of the lending fund's net assets at the time of the loan. A fund's Interfund Loans to any one fund shall not exceed 5% of the lending fund's net assets. The duration of Interfund Loans is limited to the time required to receive payment for securities sold, but in no event more than seven days. Loans effected within seven days of each other will be treated as separate loan transactions for purposes of this condition. Each Interfund Loan may be called on one business day's notice by a lending fund and may be repaid on any day by a borrowing fund.

The limitations detailed above and the other conditions of the SEC exemptive order permitting interfund lending are designed to minimize the risks associated with interfund lending for both the lending fund and the borrowing fund. However, no borrowing or lending activity is without risk. When a fund borrows money from another fund, there is a risk that the loan could be called on one day's notice or not renewed, in which case the fund may have to borrow from a bank at higher rates if an Interfund Loan were not available from another fund. A delay in repayment to a lending fund could result in a lost opportunity or additional lending costs.

When-issued and delayed delivery securities

The fund may purchase securities, including U.S. government securities, on a when-issued basis or may purchase or sell securities for delayed delivery. In such transactions, delivery of the securities occurs beyond the normal settlement period, but no payment or delivery is made by the fund prior to the actual delivery or payment by the other party to the transaction. The fund will not earn income on these securities until delivered. The purchase of securities on a when-issued or delayed delivery basis involves the risk that the value of the securities purchased will decline prior to the settlement date. The sale of securities for delayed delivery involves the risk that the prices available in the market on the delivery date may be greater than those obtained in the sale transaction.

The fund may enter into when-issued or delayed delivery transactions notwithstanding the limitation on the issuance of senior securities in Section 18 of the 1940 Act, provided that the fund intends to physically settle the transaction; and the transaction will settle within 35 days of its trade date.

Disclosure of portfolio holdings

The Board of Trustees has adopted policies and procedures relating to disclosure of the Pioneer funds' portfolio securities. These policies and procedures are designed to provide a framework for disclosing information regarding portfolio holdings, portfolio composition or other portfolio characteristics consistent with applicable federal securities laws and regulations and general principles of fiduciary duty relating to fund shareholders. While Amundi US may manage other separate accounts and unregistered products that have substantially similar investment strategies to those of another Pioneer fund, and therefore portfolio holdings that may be substantially similar, and in some cases nearly identical, to such fund, these policies and procedures only relate to the disclosure of portfolio information of

the Pioneer funds that are registered management companies. Separate account and unregistered product clients are not subject to these policies and procedures. Separate account and unregistered product clients of Amundi US have access to their portfolio holdings, and prospective clients have access to representative holdings.

Currently, the fund discloses its complete portfolio holdings as of the last business day of the month no later than five business days after month-end on the funds' website (us.pioneerinvestments.com). Such information may be sent to rating agencies, reporting/news services and financial intermediaries, upon request.

Amundi US may provide a fund's full portfolio holdings or other information to certain entities prior to the date such information is made public, provided that certain conditions are met. The entities to which such disclosure may be made as of the date of this statement of additional information are rating agencies, plan sponsors, prospective separate account clients, institutional investors and other financial intermediaries (i.e., organizations evaluating a fund for purposes of investment by their clients, such as broker-dealers, investment advisers, banks, insurance companies, financial planning firms, plan sponsors, plan administrators, shareholder servicing organizations and pension consultants). The third party must agree to a limited use of that information which does not conflict with the interests of the fund's shareholders, to use the information only for that authorized purpose, to keep such information confidential, and not to trade on such information. The Board of Trustees considered the disclosure of portfolio holdings information to these categories of entities to be consistent with the best interests of shareholders in light of the agreement to maintain the confidentiality of such information and only to use such information for the limited and approved purposes. Amundi US's compliance department, the local head of investment management and the global chief investment officer may, but only acting jointly, grant exemptions to this policy. Exemptions may be granted only if these persons determine that providing such information is consistent with the interests of shareholders and the third party agrees to limit the use of such information only for the authorized purpose, to keep such information confidential, and not to trade on such information. Although the Board of Trustees will periodically be informed of exemptions granted, granting exemptions entails the risk that portfolio holdings information may be provided to entities that use the information in a manner inconsistent with their obligations and the best interests of a fund.

Currently, Amundi US, on behalf of the Pioneer funds, has ongoing arrangements whereby the following entities may receive a fund's full portfolio holdings or other information prior to the date such information is made public: Metropolitan Life Insurance Company (within 30 days after month end for board materials and advance preparation of marketing materials, as needed to evaluate Pioneer funds); Roszel Advisors (within 30 days after month end for due diligence and review of certain Pioneer funds included in fund programs); Oppenheimer & Co. (within 30 days after month end for due diligence and review of certain Pioneer funds included in fund programs); UBS (within 15 days after month end for due diligence and review of certain Pioneer funds included in fund programs); Beacon Pointe Advisors (as needed for quarterly review of certain Pioneer funds); Commonwealth Financial Network (within 30 days after month end for risk analysis on funds on behalf of their clients); Hartford Retirement Services, LLC (as needed for risk analysis on funds on behalf of their clients); Transamerica Life Insurance Company (as needed for performance and risk analysis on funds on behalf of their clients); TIBCO Software Inc./Spotfire Division (as needed to evaluate and develop portfolio reporting software); Curcio Webb, LLC (as needed for evaluation and research purposes); Fidelity Investments (as needed to evaluate Pioneer funds); Egan Jones Ratings Company (as needed in order to evaluate and select Nationally Recognized Statistical Rating Organizations (NRSROs)); DBRS Limited (as needed in order to evaluate and select NRSROs); Wells Fargo Advisors (as needed for risk analysis on funds on behalf of their clients and product review); and Capital Market Consultants (as needed to complete quarterly due diligence research).

Compliance with the funds' portfolio holdings disclosure policy is subject to periodic review by the Board of Trustees, including a review of any potential conflicts of interest in the disclosures made by Amundi US in accordance with the policy or the exceptions permitted under the policy. Any change to the policy to expand the categories of entities to which portfolio holdings may be disclosed or an increase in the purposes for which such disclosure may be made would be subject to approval by the Board of Trustees and, reflected, if material, in a supplement to the fund's statement of additional information.

The funds' portfolio holdings disclosure policy is not intended to prevent the disclosure of any and all portfolio information to the funds' service providers who generally need access to such information in the performance of their contractual duties and responsibilities, such as Amundi US, the funds' custodian, fund accounting agent, principal underwriter, investment sub-adviser, if any, independent registered public accounting firm or counsel. In approving

the policy, the Board of Trustees considered that the service providers are subject to duties of confidentiality arising under law or contract that provide an adequate safeguard for such information. None of Amundi US, the funds, or any other party receive any compensation or other consideration from any arrangement pertaining to the release of a fund's portfolio holdings information.

In addition, the funds make their portfolio holdings available semi-annually on Form N-CSR. These shareholder reports are filed with the SEC, as required by the federal securities laws. Form N-CSR is filed with the SEC within ten (10) days after the transmission to shareholders of a fund's annual or semi-annual report, as applicable.

The fund also must file with the SEC a monthly report of portfolio holdings on Form N-MFP, current as of the last day of the previous month, no later than the fifth business day of each month. The information filed with the SEC on Form N-MFP is made available to the public 60 days after the end of the month to which the information pertains.

Investment restrictions

Fundamental investment policies

The fund has adopted certain fundamental investment policies which may not be changed without the affirmative vote of the holders of a "majority of the outstanding voting securities" (as defined in the 1940 Act) of the fund. For this purpose, a majority of the outstanding shares of the fund means the vote of the lesser of:

(1)

67% or more of the shares represented at a meeting, if the holders of more than 50% of the outstanding shares are present in person or by proxy; or

(2)

more than 50% of the outstanding shares of the fund.

The fund's fundamental policies are as follows:

(1)

The fund may not borrow money except as permitted by (i) the 1940 Act, or interpretations or modifications by the SEC, SEC staff or other authority of competent jurisdiction, or (ii) exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction.

(2)

The fund may not engage in the business of underwriting the securities of other issuers except as permitted by (i) the 1940 Act, or interpretations or modifications by the SEC, SEC staff or other authority of competent jurisdiction, or (ii) exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction.

(3)

The fund may lend money or other assets to the extent permitted by (i) the 1940 Act, or interpretations or modifications by the SEC, SEC staff or other authority of competent jurisdiction or (ii) exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction.

(4)

The fund may not issue senior securities except as permitted by (i) the 1940 Act, or interpretations or modifications by the SEC, SEC staff or other authority of competent jurisdiction, or (ii) exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction.

(5)

The fund may not purchase or sell real estate except as permitted by (i) the 1940 Act, or interpretations or modifications by the SEC, SEC staff or other authority of competent jurisdiction, or (ii) exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction.

(6)

The fund may purchase or sell commodities or contracts related to commodities to the extent permitted by (i) the 1940 Act, or interpretations or modifications by the SEC, SEC staff or other authority of competent jurisdiction, or (ii) exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction.

(7)

Except as permitted by exemptive or other relief or permission from the SEC, SEC staff or other authority of competent jurisdiction, the fund may not make any investment if, as a result, the fund's investments will be concentrated in any one industry, except the fund may invest without limitation in obligations issued by banks.

With respect to the fundamental policy relating to borrowing money set forth in (1) above, the 1940 Act permits a fund to borrow money in amounts of up to one-third of the fund's total assets from banks for any purpose, and to borrow up to 5% of the fund's total assets from banks or other lenders for temporary purposes (the fund's total assets

include the amounts being borrowed). To limit the risks attendant to borrowing, the 1940 Act requires the fund to maintain at all times an "asset coverage" of at least 300% of the amount of its borrowings. Asset coverage means the ratio that the value of the fund's total assets (including amounts borrowed), minus liabilities other than borrowings, bears to the aggregate amount of all borrowings. Borrowing money to increase a fund's investment portfolio is known as "leveraging." Borrowing, especially when used for leverage, may cause the value of a fund's shares to be more volatile than if the fund did not borrow. This is because borrowing tends to magnify the effect of any increase or decrease in the value of the fund's portfolio holdings. Borrowed money thus creates an opportunity for greater gains, but also greater losses. To repay borrowings, the fund may have to sell securities at a time and at a price that is unfavorable to the fund. There also are costs associated with borrowing money, and these costs would offset and could eliminate a fund's net investment income in any given period. Currently, the fund does not contemplate borrowing for leverage, but if the fund does so, it will not likely do so to a substantial degree. The policy in (1) above will be interpreted to permit the fund to engage in trading practices and investments that may be considered to be borrowing to the extent permitted by the 1940 Act. Reverse repurchase agreements may be considered to be a type of borrowing. Short-term credits necessary for the settlement of securities transactions and arrangements with respect to securities lending will not be considered to be borrowings under the policy. Practices and investments that may involve leverage but are not considered to be borrowings are not subject to the policy. Such trading practices may include futures, options on futures, forward contracts and other derivative investments.

A fund may pledge its assets and guarantee the securities of another company without limitation, subject to the fund's investment policies (including the fund's fundamental policy regarding borrowing) and applicable laws and interpretations. Pledges of assets and guarantees of obligations of others are subject to many of the same risks associated with borrowings and, in addition, are subject to the credit risk of the obligor for the underlying obligations. To the extent that pledging or guaranteeing assets may be considered the issuance of senior securities, the issuance of senior securities is governed by the fund's policies on senior securities. If the fund were to pledge its assets, the fund would take into account any then-applicable legal guidance, including any applicable SEC staff position, would be guided by the judgment of the fund's Board and Pioneer regarding the terms of any credit facility or arrangement, including any collateral required, and would not pledge more collateral than, in their judgment, is necessary for the fund to obtain the credit sought. Shareholders should note that in 1973, the SEC staff took the position in a no-action letter that a mutual fund could not pledge 100% of its assets without a compelling business reason. In more recent no-action letters, including letters that address the same statutory provision of the 1940 Act (Section 17) addressed in the 1973 letter, the SEC staff has not mentioned any limitation on the amount of collateral that may be pledged to support credit obtained. This does not mean that the staff's position on this issue has changed.

With respect to the fundamental policy relating to underwriting set forth in (2) above, the 1940 Act does not prohibit a fund from engaging in the underwriting business or from underwriting the securities of other issuers; in fact, the 1940 Act permits a fund to have underwriting commitments of up to 25% of its assets under certain circumstances. Those circumstances currently are that the amount of the fund's underwriting commitments, when added to the value of the fund's investments in issuers where the fund owns more than 10% of the outstanding voting securities of those issuers, cannot exceed the 25% cap. A fund engaging in transactions involving the acquisition or disposition of portfolio securities may be considered to be an underwriter under the Securities Act of 1933, as amended (the "1933 Act"). Under the 1933 Act, an underwriter may be liable for material omissions or misstatements in an issuer's registration statement or prospectus. Securities purchased from an issuer and not registered for sale under the 1933 Act are considered restricted securities. There may be a limited market for these securities. If these securities are registered under the 1933 Act, they may then be eligible for sale but participating in the sale may subject the seller to underwriter liability. These risks could apply to a fund investing in restricted securities. Although it is not believed that the application of the 1933 Act provisions described above would cause a fund to be engaged in the business of underwriting, the policy in (2) above will be interpreted not to prevent the fund from engaging in transactions involving the acquisition or disposition of portfolio securities, regardless of whether the fund may be considered to be an underwriter under the 1933 Act.

With respect to the fundamental policy relating to lending set forth in (3) above, the 1940 Act does not prohibit a fund from making loans; however, SEC staff interpretations currently prohibit funds from lending more than one-third of their total assets, except through the purchase of debt obligations or the use of repurchase agreements. (A repurchase agreement is an agreement to purchase a security, coupled with an agreement to sell that security back to the original

seller on an agreed-upon date at a price that reflects current interest rates. The SEC frequently treats repurchase agreements as loans.) While lending securities may be a source of income to a fund, as with other extensions of credit, there are risks of delay in recovery or even loss of rights in the underlying securities should the borrower fail financially. However, loans would be made only when the fund's manager or a subadviser believes the income justifies the attendant risks. The fund also will be permitted by this policy to make loans of money, including to other funds. The fund has obtained exemptive relief from the SEC to make short-term loans to other Pioneer funds through a credit facility in order to satisfy redemption requests or to cover unanticipated cash shortfalls; as discussed in this Statement of Additional Information under "Interfund Lending". The conditions of the SEC exemptive order permitting interfund lending are designed to minimize the risks associated with interfund lending, however no lending activity is without risk. A delay in repayment to a lending fund could result in a lost opportunity or additional lending costs. The policy in (3) above will be interpreted not to prevent the fund from purchasing or investing in debt obligations and loans. In addition, collateral arrangements with respect to options, forward currency and futures transactions and other derivative instruments, as well as delays in the settlement of securities transactions, will not be considered loans.

With respect to the fundamental policy relating to issuing senior securities set forth in (4) above, "senior securities" are defined as fund obligations that have a priority over the fund's shares with respect to the payment of dividends or the distribution of fund assets. The 1940 Act prohibits a fund from issuing senior securities except that the fund may borrow money in amounts of up to one-third of the fund's total assets from banks for any purpose. A fund also may borrow up to 5% of the fund's total assets from banks or other lenders for temporary purposes, and these borrowings are not considered senior securities. The issuance of senior securities by a fund can increase the speculative character of the fund's outstanding shares through leveraging. Leveraging of a fund's portfolio through the issuance of senior securities magnifies the potential for gain or loss on monies, because even though the fund's net assets remain the same, the total risk to investors is increased.

With respect to the fundamental policy relating to real estate set forth in (5) above, the 1940 Act does not prohibit a fund from owning real estate; however, a fund is limited in the amount of illiquid assets it may purchase. Investing in real estate may involve risks, including that real estate is generally considered illiquid and may be difficult to value and sell. Owners of real estate may be subject to various liabilities, including environmental liabilities. To the extent that investments in real estate are considered illiquid, Rule 2a-7 limits a fund's purchases of illiquid securities to 5% of its total assets. The policy in (5) above will be interpreted not to prevent the fund from investing in real estate-related companies, companies whose businesses consist in whole or in part of investing in real estate, instruments (like mortgages) that are secured by real estate or interests therein, or real estate investment trust securities.

With respect to the fundamental policy relating to commodities set forth in (6) above, the 1940 Act does not prohibit a fund from owning commodities, whether physical commodities and contracts related to physical commodities (such as oil or grains and related futures contracts), or financial commodities and contracts related to financial commodities (such as currencies and, possibly, currency futures). However, a fund is limited in the amount of illiquid assets it may purchase. To the extent that investments in commodities are considered illiquid, Rule 2a-7 limits a fund's purchases of illiquid securities to 5% of its total assets. If a fund were to invest in a physical commodity or a physical commodity-related instrument, the fund would be subject to the additional risks of the particular physical commodity and its related market. The value of commodities and commodity-related instruments may be extremely volatile and may be affected either directly or indirectly by a variety of factors. There also may be storage charges and risks of loss associated with physical commodities. The policy in (6) above will be interpreted to permit investments in exchange traded funds that invest in physical and/or financial commodities.

With respect to the fundamental policy relating to concentration set forth in (7) above, the 1940 Act does not define what constitutes "concentration" in an industry. The SEC staff has taken the position that investment of 25% or more of a fund's total assets in one or more issuers conducting their principal activities in the same industry or group of industries constitutes concentration. It is possible that interpretations of concentration could change in the future. A fund that invests a significant percentage of its total assets in a single industry may be particularly susceptible to adverse events affecting that industry and may be more risky than a fund that does not concentrate in an industry. The policy in (7) above will be interpreted to refer to concentration as that term may be interpreted from time to time. The policy also will be interpreted to permit investment without limit in the following: securities of the U.S. government and its agencies or instrumentalities; and repurchase agreements collateralized by any such obligations.

Accordingly, issuers of the foregoing securities will not be considered to be members of any industry. Tax-exempt funds that invest 80% of their net assets in tax-exempt securities characterize investments in securities the interest upon which is paid from revenues of similar type projects by the type or types of projects.

In addition, money market funds are subject to special SEC rules relating to concentration. The rules do not provide for any limit on a money market fund's concentration in any one industry, and allow a money market fund to invest without limit in obligations of banks without being deemed to concentrate their investments. The fund's policy permits (but does not require) the fund to take advantage of the flexibility to invest in bank obligations that the SEC has granted to money market funds, to the extent consistent with the fund's other investment strategies and policies. However, the fund is currently required to invest at least 99.5% of its total assets in U.S. government securities, cash, and/or repurchase agreements that are fully collateralized by U.S. government securities or cash. The policy also will be interpreted to give broad authority to the fund as to how to classify issuers within or among industries. When identifying industries for purposes of its concentration policy, the fund may rely upon available industry classifications. As of the date of the SAI, the fund relies primarily on the Bloomberg L.P. ("Bloomberg") classifications, and, with respect to securities for which no industry classification under Bloomberg is available or for which the Bloomberg classification is determined not to be appropriate, the fund may use industry classifications published by another source, which, as of the date of the SAI, is MSCI Global Industry Classification Standard. The fund may change any source used for determining industry classification without shareholder approval.

The fund's fundamental policies are written and will be interpreted broadly. For example, the policies will be interpreted to refer to the 1940 Act and the related rules as they are in effect from time to time, and to interpretations and modifications of or relating to the 1940 Act by the SEC and others as they are given from time to time. When a policy provides that an investment practice may be conducted as permitted by the 1940 Act, the policy will be interpreted to mean either that the 1940 Act expressly permits the practice or that the 1940 Act does not prohibit the practice.

Non-fundamental investment policy

The following policy is non-fundamental and may be changed by a vote of the Board of Trustees without approval of shareholders.

The fund may not invest in any investment company in reliance on Section 12(d)(1)(F) of the 1940 Act, which would allow the fund to invest in other investment companies, or in reliance on Section 12(d)(1)(G) of the 1940 Act, which would allow the fund to invest in other Pioneer funds, in each case without being subject to the limitations discussed above under "Other Investment Companies" so long as another investment company invests in the fund in reliance on Section 12(d)(1)(G). The fund has adopted this non-fundamental policy in order that the fund may be a permitted investment of the series of Pioneer Asset Allocation Trust. If the series of Pioneer Asset Allocation Trust do not invest in the fund, then this non-fundamental restriction will not apply.

In addition, the fund's investment objective is non-fundamental and it and the fund's non-fundamental investment policies may be changed by a vote of the Board of Trustees without approval of shareholders at any time.

Diversification

The fund is currently classified as a diversified fund under the 1940 Act. A diversified fund may not purchase securities of an issuer (other than obligations issued or guaranteed by the U.S. government, its agencies or instrumentalities and securities of other investment companies) if, with respect to 75% of the fund's total assets, (a) more than 5% of the fund's total assets would be invested in securities of that issuer, or (b) the fund would hold more than 10% of the outstanding voting securities of that issuer. Under the 1940 Act, the fund cannot change its classification from diversified to non-diversified without shareholder approval.

Other restrictions

The adviser generally will not invest fund assets in companies engaged in the production, sale, storage of, or providing services for, certain controversial weapons, including chemical, biological and depleted uranium weapons and certain antipersonnel mines and cluster bombs.

3. Trustees and officers

The fund's Trustees and officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 46 U.S. registered investment portfolios for which Amundi US serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the fund is 60 State Street, Boston, Massachusetts 02109.

Name, Age and Position Held With the Fund	Term of Office and Length of Service	Principal Occupation(s) During At Least The Past Five Years	Other Directorships Held by Trustee During At Least The Past Five Years
Independent Trustees:
Thomas J. Perna (73) Chairman of the Board and Trustee	Trustee since 2006. Serves until a successor trustee is elected or earlier retirement or removal.	Private investor (2004 - 2008 and 2013 - present); Chairman (2008 - 2013) and Chief Executive Officer (2008 - 2012), Quadriserv, Inc. (technology products for securities lending industry); and Senior Executive Vice President, The Bank of New York (financial and securities services) (1986 - 2004)	Director, Broadridge Financial Solutions, Inc. (investor communications and securities processing provider for financial services industry) (2009 - 2023); Director, Quadriserv, Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - 2015)
John E. Baumgardner, Jr. (73)* Trustee	Trustee since 2019. Serves until a successor trustee is elected or earlier retirement or removal.	Of Counsel (2019 - present), Partner (1983-2018), Sullivan & Cromwell LLP (law firm).	Chairman, The Lakeville Journal Company, LLC, (privately-held community newspaper group) (2015-present)
Diane Durnin (67) Trustee	Trustee since 2019. Serves until a successor trustee is elected or earlier retirement or removal.	Managing Director - Head of Product Strategy and Development, BNY Mellon Investment Management (investment management firm) (2012-2018); Vice Chairman - The Dreyfus Corporation (2005 - 2018): Executive Vice President Head of Product, BNY Mellon Investment Management (2007-2012); Executive Director- Product Strategy, Mellon Asset Management (2005-2007); Executive Vice President Head of Products, Marketing and Client Service, Dreyfus Corporation (investment management firm) (2000-2005); Senior Vice President Strategic Product and Business Development, Dreyfus Corporation (1994-2000)	None

Name, Age and Position Held With the Fund	Term of Office and Length of Service	Principal Occupation(s) During At Least The Past Five Years	Other Directorships Held by Trustee During At Least The Past Five Years
Benjamin M. Friedman (79) Trustee	Trustee since 2008. Serves until a successor trustee is elected or earlier retirement or removal.	William Joseph Maier Professor of Political Economy, Harvard University (1972 - present)	Trustee, Mellon Institutional Funds Investment Trust and Mellon Institutional Funds Master Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008)
Craig C. MacKay (61) Trustee	Trustee since 2021. Serves until a successor trustee is elected or earlier retirement or removal.	Partner, England & Company, LLC (advisory firm) (2012 - present); Group Head - Leveraged Finance Distribution, Oppenheimer & Company (investment bank) (2006 - 2012); Group Head - Private Finance & High Yield Capital Markets Origination, SunTrust Robinson Humphrey (investment bank) (2003 - 2006); and Founder and Chief Executive Officer, HNY Associates, LLC (investment bank) (1996 - 2003)	Director, Equitable Holdings, Inc. (financial services holding company) (2022 - present); Board Member of Carver Bancorp, Inc. (holding company) and Carver Federal Savings Bank, NA (2017 - present); Advisory Council Member, MasterShares ETF (2016 - 2017); Advisory Council Member, The Deal (financial market information publisher) (2015 - 2016); Board Co-Chairman and Chief Executive Officer, Danis Transportation Company (privately-owned commercial carrier) (2000 - 2003); Board Member and Chief Financial Officer, Customer Access Resources (privately-owned teleservices company) (1998 - 2000); Board Member, Federation of Protestant Welfare Agencies (human services agency) (1993 - present); and Board Treasurer, Harlem Dowling Westside Center (foster care agency) (1999 - 2018)

Name, Age and Position Held With the Fund	Term of Office and Length of Service	Principal Occupation(s) During At Least The Past Five Years	Other Directorships Held by Trustee During At Least The Past Five Years
Lorraine H. Monchak (68) Trustee	Trustee since 2017. (Advisory Trustee from 2014 - 2017). Serves until a successor trustee is elected or earlier retirement or removal.	Chief Investment Officer, 1199 SEIU Funds (healthcare workers union pension funds) (2001 - present); Vice President - International Investments Group, American International Group, Inc. (insurance company) (1993 - 2001); Vice President Corporate Finance and Treasury Group, Citibank, N.A.(1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government-sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987)	None
Fred J. Ricciardi (77) Trustee	Trustee since 2014. Serves until a successor trustee is elected or earlier retirement or removal.	Private investor (2020 - present); Consultant (investment company services) (2012 - 2020); Executive Vice President, BNY Mellon (financial and investment company services) (1969 - 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012); Director, Financial Models (technology) (2005-2007); Director, BNY Hamilton Funds, Ireland (offshore investment companies) (2004-2007); Chairman/Director, AIB/BNY Securities Services, Ltd., Ireland (financial services) (1999-2006); Chairman, BNY Alternative Investment Services, Inc. (financial services) (2005-2007)	None

Name, Age and Position Held With the Fund	Term of Office and Length of Service	Principal Occupation(s) During At Least The Past Five Years	Other Directorships Held by Trustee During At Least The Past Five Years
Interested Trustee:
Lisa M. Jones (62)** Trustee, President and Chief Executive Officer	Trustee since 2017. Serves until a successor trustee is elected or earlier retirement or removal	Director, CEO and President of Amundi US, Inc. (investment management firm) (since September 2014); Director, CEO and President of Amundi Asset Management US, Inc. (since September 2014); Director, CEO and President of Amundi Distributor US, Inc. (since September 2014); Director, CEO and President of Amundi Asset Management US, Inc. (since September 2014); Chair, Amundi US, Inc., Amundi Distributor US, Inc. and Amundi Asset Management US, Inc. (September 2014 - 2018); Managing Director, Morgan Stanley Investment Management (investment management firm) (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (investment management firm) (2005 - 2010); Director of Amundi Holdings US, Inc. (since 2017)	Director of Clearwater Analytics (provider of web-based investment accounting software for reporting and reconciliation services) (September 2022 - present)

Name, Age and Position Held With the Fund	Term of Office and Length of Service	Principal Occupation(s) During At Least The Past Five Years	Other Directorships Held by Trustee During At Least The Past Five Years
Advisory Trustee:
Marguerite A. Piret (75)*** Advisory Trustee	Advisory Trustee since January 2024 (Trustee from 1987 to January 2024).	Chief Financial Officer, American Ag Energy, Inc. (technology for the environment, energy and agriculture) (2019 - present); Chief Operating Officer, North Country Growers LLC (controlled environment agriculture company) (2020 - present); Chief Executive Officer, Green Heat LLC (biofuels company) (2022 - present); President and Chief Executive Officer, Newbury Piret Company (investment banking firm) (1981 - 2019)	Director of New America High Income Fund, Inc. (closed-end investment company) (2004 - present); and Member, Board of Governors, Investment Company Institute (2000 - 2006)

Name, Age and Position Held With the Fund	Term of Office and Length of Service	Principal Occupation(s) During At Least The Past Five Years	Other Directorships Held by Officer During At Least The Past Five Years
Fund Officers:
Marco Pirondini (57) Executive Vice President	Since January 2024. Serves at the discretion of the Board	Executive Vice President and Chief Investment Officer of Amundi Asset Management US, Inc. since January 2024; Senior Managing Director and Head of Equities U.S. of Amundi US from 2010 to December 2023	None
Christopher J. Kelley (59) Secretary and Chief Legal Officer	Since 2003. Serves at the discretion of the Board	Senior Vice President and Deputy General Counsel of Amundi US since March 2024; Vice President and Associate General Counsel of Amundi US from January 2008 to March 2024; Secretary and Chief Legal Officer of all of the Pioneer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; Vice President and Senior Counsel of Amundi US from July 2002 to December 2007	None
Thomas Reyes (61) Assistant Secretary	Since 2010. Serves at the discretion of the Board	Associate General Counsel of Amundi US since March 2023; Assistant Secretary of all the Pioneer Funds since June 2010; Assistant General Counsel of Amundi US from May 2013 to March 2023 and Counsel of Amundi US from June 2007 to May 2013	None
Heather L. Melito-Dezan (47) Assistant Secretary	Since 2022. Serves at the discretion of the Board	Director - Trustee and Board Relationships of Amundi US since September 2019; Assistant Secretary of Amundi US, Inc. since July 2020: Assistant Secretary of Amundi Asset Management US, Inc. since July 2020: Assistant Secretary of Amundi Distributor US, Inc. since July 2020; Assistant Secretary of all the Pioneer Funds since September 2022; Private practice from 2017 - 2019.	None

Name, Age and Position Held With the Fund	Term of Office and Length of Service	Principal Occupation(s) During At Least The Past Five Years	Other Directorships Held by Officer During At Least The Past Five Years
Anthony J. Koenig, Jr. (60) Treasurer and Chief Financial and Accounting Officer	Since 2021. Serves at the discretion of the Board	Managing Director, Chief Operations Officer and Fund Treasurer of Amundi US since May 2021; Treasurer of all of the Pioneer Funds since May 2021; Assistant Treasurer of all of the Pioneer Funds from January 2021 to May 2021; and Chief of Staff, US Investment Management of Amundi US from May 2008 to January 2021	None
Luis I. Presutti (59) Assistant Treasurer	Since 2000. Serves at the discretion of the Board	Director - Fund Treasury of Amundi US since 1999; and Assistant Treasurer of all of the Pioneer Funds since 1999	None
Gary Sullivan (66) Assistant Treasurer	Since 2002. Serves at the discretion of the Board	Senior Manager - Fund Treasury of Amundi US since 2012; and Assistant Treasurer of all of the Pioneer Funds since 2002	None
Antonio Furtado (42) Assistant Treasurer	Since 2020. Serves at the discretion of the Board	Fund Oversight Manager - Fund Treasury of Amundi US since 2020; Assistant Treasurer of all of the Pioneer Funds since 2020; and Senior Fund Treasury Analyst from 2012 - 2020	None
Michael Melnick (53) Assistant Treasurer	Since 2021. Serves at the discretion of the Board	Vice President - Deputy Fund Treasurer of Amundi US since May 2021; Assistant Treasurer of all of the Pioneer Funds since July 2021; Director of Regulatory Reporting of Amundi US from 2001 - 2021; and Director of Tax of Amundi US from 2000 - 2001	None
John Malone (53) Chief Compliance Officer	Since 2018. Serves at the discretion of the Board	Managing Director, Chief Compliance Officer of Amundi US Asset Managementt; Amundi Asset Management US, Inc.; and the Pioneer Funds since September 2018; Chief Compliance Officer of Amundi Distributor US, Inc. since January 2014.	None
Brandon Austin (52) Anti-Money Laundering Officer	Since 2022. Serves at the discretion of the Board	Director, Financial Security - Amundi Asset Management; Anti-Money Laundering Officer of all the Pioneer Funds since March 2022: Director of Financial Security of Amundi US since July 2021; Vice President, Head of BSA, AML and OFAC, Deputy Compliance Manager, Crédit Agricole Indosuez Wealth Management (investment management firm) (2013 - 2021)	None

Mr. Baumgardner is Of Counsel to Sullivan & Cromwell LLP, which acts as counsel to the Independent Trustees of each Pioneer Fund.

Ms. Jones is an Interested Trustee because she is an officer or director of the fund's investment adviser and certain of its affiliates.

***

Ms. Piret became a non-voting Advisory Trustee effective January 22, 2024.

Board committees

The Board of Trustees is responsible for overseeing the fund's management and operations. The Chairman of the

Board is an Independent Trustee. Independent Trustees constitute more than 75% of the Board. During the most recent fiscal year, the Board of Trustees held 8 meetings. Each Trustee attended at least 75% of such meetings.

The Trustees were selected to join the Board based upon the following as to each Board member: such person's character and integrity; such person's judgment, analytical ability, intelligence, and common sense; such person's experience and previous profit and not-for-profit board membership; such person's demonstrated willingness to take an independent and questioning stance toward management; such person's willingness and ability to commit the time necessary to perform the duties of a Trustee; as to each Independent Trustee, his or her status as not being an "interested person" as defined under the 1940 Act; and, as to Ms. Jones, her association with Amundi US. Each Trustee also serves on the Boards of Trustees of other exchange-listed closed-end funds, closed-end interval funds, and open-end funds, all part of the Pioneer Funds complex, and has substantial experience protecting fund shareholders' interests. Each of the Independent Trustees also was selected to join the Board based on the criteria and principles set forth in the Charter of the Fund's Governance and Nominating Committee. In evaluating a Trustee's prospective service on the Board, the Trustee's experience in, and ongoing contributions toward, overseeing the fund's business as a Trustee also are considered.

In addition, the following specific experience, qualifications, attributes and/or skills apply as to each Trustee: Mr. Baumgardner, legal, investment management, business and public company experience as an attorney practicing investment management, corporate and securities law and experience as a board member of other organizations; Ms. Durnin, investment management and investment company experience as an executive officer of an investment adviser; Mr. Friedman, academic leadership, economic and finance experience and investment company board experience; Mr. MacKay, investment, financial and business experience as a partner in an investment banking firm and experience as a board member of other organizations; Ms. Monchak, investment, financial and business experience, including as the chief investment officer of a pension fund; Mr. Perna, accounting, financial, and business experience as an executive officer and experience as a board member of other organizations; Mr. Ricciardi, financial, business and investment company experience as an executive officer of a financial and investment company services organization, and experience as a board member of offshore investment companies and other organizations; and Ms. Jones, investment management experience as an executive and leadership roles with Amundi US and its affiliates. However, in its periodic assessment of the effectiveness of the Board, the Board considers the complementary skills and experience of individual Trustees primarily in the broader context of the Board's overall composition so that the Board, as a body, possesses the appropriate (and appropriately diverse) skills and experience to oversee the business of the fund.

The Trust's Amended and Restated Agreement and Declaration of Trust provides that the appointment, designation (including in any proxy or registration statement or other document) of a Trustee as an expert on any topic or in any area, or as having experience, attributes or skills in any area, or any other appointment, designation or identification, shall not impose on that person any standard of care or liability that is greater than that imposed on that person as a Trustee in the absence of the appointment, designation or identification, and no Trustee who has special attributes, skills, experience or expertise, or is appointed, designated, or identified as aforesaid, shall be held to a higher standard of care by virtue thereof.

The Board of Trustees has four standing committees: the Independent Trustees Committee, the Audit Committee, the Governance and Nominating Committee and the Policy Administration Committee. Each committee is chaired by an Independent Trustee and all members of each committee are Independent Trustees.

The Chairs of the committees work with the Chairman of the Board and fund management in setting the agendas for Board meetings. The Chairs of the committees set the agendas for committee meetings with input from fund management. As noted below, through the committees, the Independent Trustees consider and address important matters involving the fund, including those presenting conflicts or potential conflicts of interest for management. The Independent Trustees also regularly meet without the presence of management and are advised by independent legal counsel. The Board believes that the committee structure, and delegation to the committees of specified oversight responsibilities, help the Board more effectively to provide governance and oversight of the fund's affairs. Mr. Perna, Chairman of the Board, is a member of each committee except the Audit Committee, of which he is a non-voting, ex-officio member.

During the most recent fiscal year, the Independent Trustees, Audit, Governance and Nominating and Policy Administration Committees held 6, 6, 5 and 4 meetings, respectively.

Independent Trustees Committee

John E. Baumgardner, Jr., Diane Durnin, Benjamin M. Friedman, Craig C. MacKay, Lorraine H. Monchak, Thomas J. Perna (Chair) and Fred J. Ricciardi.

The Independent Trustees Committee is comprised of all of the Independent Trustees. The Independent Trustees Committee serves as the forum for consideration of a number of issues required to be considered separately by the Independent Trustees under the 1940 Act, including the assessment and review of the fund's advisory agreement and other related party contracts. The Independent Trustees Committee also considers issues that the Independent Trustees believe it is advisable for them to consider separately from the Interested Trustees.

Audit Committee

Benjamin M. Friedman, Craig C. MacKay, Lorraine H. Monchak and Fred J. Ricciardi (Chair).

The Audit Committee, among other things, oversees the accounting and financial reporting policies and practices of the fund, oversees the quality and integrity of the fund's financial statements, approves, and recommends to the Independent Trustees for their ratification, the engagement of the fund's independent registered public accounting firm, reviews and evaluates the accounting firm's qualifications, independence and performance, and approves the compensation of the accounting firm. The Audit Committee also approves all audit and permissible non-audit services provided to the fund by the fund's accounting firm and all permissible non-audit services provided by the fund's accounting firm to Amundi US and any affiliated service providers of the fund if the engagement relates directly to the fund's operations and financial reporting. In addition, the Audit Committee reviews the reports and other information provided to the Committee by Amundi US, as the valuation designee of the fund, and assists the Board in the oversight of Amundi US as the valuation designee of the fund.

Governance and Nominating Committee

John E. Baumgardner, Jr. (Chair), Diane Durnin, and Thomas J. Perna.

The Governance and Nominating Committee considers governance matters affecting the Board and the fund. Among other responsibilities, the Governance and Nominating Committee reviews the performance of the Independent Trustees as a whole, and reviews and recommends to the Independent Trustees Committee any appropriate changes concerning, among other things, the size and composition of the Board, the Board's committee structure and the Independent Trustees' compensation. The Governance and Nominating Committee also makes recommendations to the Independent Trustees Committee or the Board on matters delegated to it.

In addition, the Governance and Nominating Committee screens potential candidates for Independent Trustees. Among other responsibilities, the Governance and Nominating Committee reviews periodically the criteria for Independent Trustees and the spectrum of desirable experience, expertise and characteristics for Independent Trustees as a whole, and reviews periodically the qualifications and requisite skills of persons currently serving as Independent Trustees and being considered for re-nomination. The Governance and Nominating Committee also reviews the qualifications of any person nominated to serve on the Board by a shareholder or recommended by any Trustee, management or another person and makes a recommendation as to the qualifications of such nominated or recommended person to the Independent Trustees and the Board, and reviews periodically the Committee's procedure, if any, regarding candidates submitted by shareholders. The Governance and Nominating Committee also strives to achieve diversity of the Board of Trustees with respect to attributes such as race, ethnicity, gender, cultural background, and professional experience when reviewing candidates for any Board vacancies. The Governance and Nominating Committee does not have specific, minimum qualifications for nominees, nor has it established specific qualities or skills that it regards as necessary for one or more of the Independent Trustees to possess (other than qualities or skills that may be required by applicable law or regulation). However, in evaluating a person as a potential nominee to serve as an Independent Trustee, the Governance and Nominating Committee will consider the following general criteria and principles, among any others that it may deem relevant:

•

whether the person has a reputation for integrity, honesty and adherence to high ethical standards;

•

whether the person has demonstrated business acumen and ability to exercise sound judgments in matters that relate to the current and long-term objectives of the fund and whether the person is willing and able to contribute positively to the decision-making process of the fund;

•

whether the person has a commitment and ability to devote the necessary time and energy to be an effective

Independent Trustee, to understand the fund and the responsibilities of a trustee of an investment company;

•

whether the person has the ability to understand the sometimes conflicting interests of the fund and the management company, and to act in the interests of the fund;

•

whether the person has, or appears to have a conflict of interest that would impair his or her ability to represent the interests of all shareholders and to fulfill the responsibilities of a trustee;

•

that nominees shall not be discriminated against on the basis of race, religion, national origin, sex, sexual orientation, disability or any other basis proscribed by law;

•

that nominees should have, or be willing to acquire, an appreciation and understanding for the oversight of publicly offered investment companies and the management, administration and distribution services provided by service providers to the companies and their shareholders, and the regulatory context within which these activities are carried out;

•

that nominees should have a collegial, collaborative approach: people who will work efficiently, effectively and in the spirit of candor and respect for fellow board members and the staffs of the service providers;

•

that nominees should have the willingness and ability to serve on appropriate committees, and contribute to and engage meaningfully in the deliberations thereof; and

•

that nominees should be committed to diversity and inclusion among Board members.

The Governance and Nominating Committee also will consider whether the nominee has the experience or skills that the Governance and Nominating Committee believes would maintain or enhance the effectiveness of the Independent Trustees' oversight of the fund's affairs, based on the then current composition and skills of the Independent Trustees and experience or skills that may be appropriate in light of changing business conditions and regulatory or other developments. The Governance and Nominating Committee does not necessarily place the same emphasis on each criterion.

The Governance and Nominating Committee does not have a formal policy for considering trustee nominees submitted by the fund's shareholders. Nonetheless, the Nominating Committee may, on an informal basis, consider any shareholder recommendations of nominees that it receives. Shareholders who wish to recommend a nominee should send recommendations to the Fund's Secretary that include all information relating to such persons that is required to be included in solicitations of proxies for the election of trustees.

Policy Administration Committee

Thomas J. Perna (Chair), John E. Baumgardner, Jr. and Diane Durnin.

The Policy Administration Committee, among other things, oversees and monitors the fund's compliance with legal and regulatory requirements that are not directly related to financial reporting, internal financial controls, independent audits or the performance of the fund's internal audit function. The Policy Administration Committee also oversees the adoption and implementation of certain of the fund's policies and procedures.

Oversight of risk management

Consistent with its responsibility for oversight of the fund in the interests of shareholders, the Board of Trustees has established a framework for the oversight of various risks relating to the fund, including the oversight of the identification of risks and the management of certain identified risks. The Board has delegated certain aspects of its risk oversight responsibilities to the committees, but relies primarily on Amundi US and its affiliates for the identification and management or mitigation of risks relating to their management activities on behalf of the fund, as well as to oversee and advise the Board on the risks that may arise relating to the activities of other fund service providers.

The fund faces a number of risks, such as investment risk, counterparty risk, valuation risk, enterprise risk, reputational risk, cybersecurity risk, risk of operational failure or lack of business continuity, and legal, compliance and regulatory risk. The goal of risk management is to identify and address risks, i.e., events or circumstances that could have material adverse effects on the business, operations, shareholder services, investment performance or reputation of the fund.

Most of the fund's investment management and business operations are carried out by or through Amundi US, its affiliates, and other service providers (such as the custodian and fund accounting agent and the transfer agent), each of which has an independent interest in risk management but whose policies and the methods by which one or more risk management functions are carried out may differ from the fund's and each other's in the setting of priorities, the

resources available or the effectiveness of relevant controls. Operational or other failures, including cybersecurity failures, at any one or more of the fund's service providers could have a material adverse effect on the fund and its shareholders.

Under the overall supervision of the Board or the applicable committee of the Board, Amundi US and the affiliates of Amundi US, or other service providers to the fund, employ a variety of processes, procedures and controls in an effort to identify, address and mitigate risks. Different processes, procedures and controls are employed with respect to different types of risks. Various personnel, including the fund's and Amundi US's chief compliance officer and Amundi US's chief risk officer and director of internal audit, as well as various personnel of Amundi US and of other service providers, make periodic reports to the applicable committee or to the Board with respect to various aspects of risk management. The reports received by the Trustees related to risks typically are summaries of relevant information.

The Trustees recognize that not all risks that may affect the fund can be identified, that it may not be practical or cost-effective to eliminate or mitigate certain risks, that it may be necessary to bear certain risks (such as investment-related risks) to achieve the fund's goals, that the processes, procedures and controls employed to address certain risks may be limited in their effectiveness, and that some risks are simply beyond the control of the fund or Amundi US and its affiliates or other service providers. Because most of the fund's operations are carried out by various service providers, the Board's oversight of the risk management processes of those service providers, including processes to address cybersecurity and other operational failures, is inherently limited. (See "Cybersecurity issues" above.) As a result of the foregoing and other factors, the fund's ability to manage risk is subject to substantial limitations.

It is important to note that the fund is designed for investors that are prepared to accept investment risk, including the possibility that as yet unforeseen risks may emerge in the future.

Compensation of officers and trustees

The Pioneer Funds, including the fund, compensate their Trustees. The Independent Trustees review and set their compensation annually, taking into consideration the committee and other responsibilities assigned to specific Trustees. The table under "Annual Fees, Expense and Other Information - Compensation of Officers and Trustees" sets forth the compensation paid to each of the Trustees. The compensation paid to the Trustees is then allocated among the funds as follows:

•

each fund with assets less than $250 million pays each Independent Trustee an annual fee of $1,000.

•

the remaining compensation of the Independent Trustees is allocated to each fund with assets greater than $250 million based on the fund's net assets.

•

the Interested Trustees receive an annual fee of $500 from each fund, except in the case of funds with net assets of $50 million or less, which pay each Interested Trustee an annual fee of $200. Amundi US reimburses these funds for the fees paid to the Interested Trustees.

Except for the chief compliance officer, the fund does not pay any salary or other compensation to its officers. The fund pays a portion of the chief compliance officer's compensation for their services as the fund's chief compliance officer. Amundi US pays the remaining portion of the chief compliance officer's compensation.

See "Compensation of Officers and Trustees" in "Annual Fee, Expense and Other Information."

Other information

The Amended and Restated Agreement and Declaration of Trust provides that no Trustee, officer or employee of the fund shall be liable to the fund or any shareholder for any action, failure to act, error or mistake except in cases of bad faith, willful misfeasance, gross negligence or reckless disregard of duty. The Amended and Restated Agreement and Declaration of Trust requires the fund to indemnify each Trustee, director, officer, employee and authorized agent to the fullest extent permitted by law against liability and against all expenses reasonably incurred or paid by him in connection with any claim, action, suit or proceeding in which he becomes involved as a party or otherwise by virtue of his being or having been such a Trustee, director, officer, employee, or agent and against amounts paid or incurred by him in settlement thereof. The 1940 Act currently provides that no officer or director shall be protected from liability to the fund or shareholders for willful misfeasance, bad faith, gross negligence, or reckless disregard of the duties of office. The Amended and Restated Agreement and Declaration of Trust extends to Trustees, officers and employees of the fund the full protection from liability that the law allows.

Material Relationships of the Independent Trustees

Mr. Baumgardner, an Independent Trustee, is Of Counsel to Sullivan & Cromwell LLP, which acts as counsel to the Independent Trustees of all of the Pioneer Funds. The aggregate compensation paid to Sullivan & Cromwell LLP by the Pioneer Funds was approximately $404,966 and $660,871 in each of 2022 and 2023.

Share ownership

See "Annual Fee, Expense and Other Information" for information on the ownership of fund shares by the Trustees, the fund's officers and owners in excess of 5% of any class of shares of the fund and a table indicating the value of shares that each Trustee beneficially owns in the fund and in all the Pioneer Funds.

Proxy voting policies

Information regarding how the fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available to shareowners without charge at https://amundi.com/US and on the SEC's website at https://www.sec.gov. The fund's proxy voting policies and procedures are attached as "Appendix B."

4. Investment adviser

The fund has entered into a management agreement (hereinafter, the "management contract") with Amundi US pursuant to which Amundi US acts as the fund's investment adviser. Amundi US is an indirect, wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi Holdings US, Inc.

Amundi is controlled by Credit Agricole S.A., a French credit institution. Credit Agricole S.A. holds approximately 68% of Amundi's share capital. The remaining shares of Amundi are held by institutional and retail investors.

Certain Trustees or officers of the fund are also directors and/or officers of certain of Amundi's subsidiaries (see management biographies above). Amundi US has entered into participating affiliate agreements with certain of its affiliates, including Amundi and certain subsidiaries of Amundi, pursuant to which these affiliates provide services, including investment management and trading services, to Amundi US.

As the fund's investment adviser, Amundi US provides the fund with investment research, advice and supervision and furnishes an investment program for the fund consistent with the fund's investment objective and policies, subject to the supervision of the fund's Trustees. Amundi US determines what portfolio securities will be purchased or sold, arranges for the placing of orders for the purchase or sale of portfolio securities, selects brokers or dealers to place those orders, maintains books and records with respect to the fund's securities transactions, and reports to the Trustees on the fund's investments and performance.

The management contract will continue in effect from year to year provided such continuance is specifically approved at least annually (i) by the Trustees of the fund or by a majority of the outstanding voting securities of the fund (as defined in the 1940 Act), and (ii) in either event, by a majority of the Independent Trustees of the fund, with such Independent Trustees casting votes in person at a meeting called for such purpose.

The management contract may be terminated without penalty by the Trustees of the fund or by vote of a majority of the outstanding voting securities of the fund on not more than 60 days' nor less than 30 days' written notice to Amundi US, or by Amundi US on not less than 90 days' written notice to the fund, and will automatically terminate in the event of its assignment (as defined in the 1940 Act) by Amundi US. The management contract is not assignable by the fund except with the consent of Amundi US.

The Trustees' approval of and the terms, continuance and termination of the management contract are governed by the 1940 Act. Pursuant to the management contract, Amundi US assumes no responsibility other than to render the services called for under the management contract, in good faith, and Amundi US will not be liable for any error of judgment or mistake of law or for any loss arising out of any investment or for any act or omission in the execution of securities or other transactions for the fund. Amundi US, however, is not protected against liability by reason of willful misfeasance, bad faith or gross negligence in the performance of its duties or by reason of its reckless disregard of its obligations and duties under the management contract. The management contract requires Amundi US to furnish all necessary services, facilities and personnel in connection with the performance of its services under the management contract, and except as specifically stated therein, Amundi US is not responsible for any of the fund's ordinary and extraordinary expenses.

Advisory fee

As compensation for its management services and expenses incurred, the fund pays Amundi US a fee at the annual rate of 0.35% of the fund's average daily net assets up to $1 billion and 0.30% of the fund's average daily net assets greater than $1 billion. This fee is computed and accrued daily and paid monthly.

From time to time, Amundi US and its affiliates have reimbursed or otherwise reduced the fund's expenses and Amundi US has waived a portion of its management fee in an effort to maintain a net asset value of $1.00 per share, for the purpose of avoiding a negative yield or for increasing the fund's yield. Amundi US and its affiliates may, but are not required to, continue to waive and/or reimburse fees in the future. Any such expense reimbursements, reductions or waivers are voluntary and temporary and may be terminated by Amundi US and its affiliate at any time without notice. Amundi US may not recapture fees and expenses previously waived and/or reimbursed.

See the table in "Annual Fee, Expense and Other Information" for the management fee paid to Amundi US during the recently completed fiscal years.

Administration agreement

The fund has entered into an amended and restated administration agreement with Amundi US pursuant to which Amundi US acts as the fund's administrator, performing certain accounting, administration and legal services for the fund. Amundi US is reimbursed for its cost of providing such services. The cost of providing these services is based on direct costs and costs of overhead, subject to review by the Board of Trustees. See "Annual Fee, Expense and Other Information" for fees the fund paid to Amundi US for administration and related services. In addition, The Bank of New York Mellon ("BNY Mellon") performs certain sub-administration services to the fund pursuant to an agreement with Amundi US and the fund.

Under the terms of the amended and restated administration agreement with the fund, Amundi US pays or reimburses the fund for expenses relating to its services for the fund, with the exception of the following, which are to be paid by the fund: (a) charges and expenses for fund accounting, pricing and appraisal services and related overhead, including, to the extent such services are performed by personnel of Amundi US, or its affiliates, office space and facilities and personnel compensation, training and benefits; (b) the charges and expenses of auditors; (c) the charges and expenses of any custodian, transfer agent, plan agent, dividend disbursing agent and registrar appointed by the fund; (d) issue and transfer taxes, chargeable to the fund in connection with securities transactions to which the fund is a party; (e) insurance premiums, interest charges, dues and fees for membership in trade associations and all taxes and corporate fees payable by the fund to federal, state or other governmental agencies; (f) fees and expenses involved in registering and maintaining registrations of the fund and/or its shares with federal regulatory agencies, state or blue sky securities agencies and foreign jurisdictions, including the preparation of prospectuses and statements of additional information for filing with such regulatory authorities; (g) all expenses of shareholders' and Trustees' meetings and of preparing, printing and distributing prospectuses, notices, proxy statements and all reports to shareholders and to governmental agencies; (h) charges and expenses of legal counsel to the fund and the Trustees; (i) any distribution fees paid by the fund in accordance with Rule 12b-1 promulgated by the SEC pursuant to the 1940 Act; (j) compensation of those Trustees of the fund who are not affiliated with or interested persons of Amundi US, the fund (other than as Trustees), Amundi US, Inc. or the distributor; (k) the cost of preparing and printing share certificates; (l) interest on borrowed money, if any; (m) fees payable by the fund under management agreements and the administration agreement; and (n) extraordinary expenses. The fund shall also assume and pay any other expense that the fund, Amundi US or any other agent of the fund may incur not listed above that is approved by the Board of Trustees (including a majority of the Independent Trustees) as being an appropriate expense of the fund. The fund shall pay all fees and expenses to be paid by the fund under the sub-administration agreement with BNY Mellon. In addition, the fund shall pay all brokers' and underwriting commissions chargeable to the fund in connection with securities transactions to which the fund is a party.

Potential conflicts of interest

The fund is managed by Amundi US, which also serves as investment adviser to other Pioneer mutual funds and other accounts (including separate accounts and unregistered products) with investment objectives identical or similar to those of the fund. Securities frequently meet the investment objectives of the fund, the other Pioneer mutual funds and such other accounts. In such cases, the decision to recommend a purchase to one fund or account rather than

another is based on a number of factors. The determining factors in most cases are the amount of securities of the issuer then outstanding, the value of those securities and the market for them. Other factors considered in the investment recommendations include other investments which each fund or account presently has in a particular industry and the availability of investment funds in each fund or account.

It is possible that at times identical securities will be held by more than one fund and/or account. However, positions in the same issue may vary and the length of time that any fund or account may choose to hold its investment in the same issue may likewise vary. To the extent that more than one of the Pioneer mutual funds or a private account managed by Amundi US seeks to acquire the same security at about the same time, the fund may not be able to acquire as large a position in such security as it desires or it may have to pay a higher price for the security. Similarly, the fund may not be able to obtain as large an execution of an order to sell or as high a price for any particular portfolio security if Amundi US decides to sell on behalf of another account the same portfolio security at the same time. On the other hand, if the same securities are bought or sold at the same time by more than one fund or account, the resulting participation in volume transactions could produce better executions for the fund. In the event more than one account purchases or sells the same security on a given date, the purchases and sales will normally be made as nearly as practicable on a pro rata basis in proportion to the amounts desired to be purchased or sold by each account. Although the other Pioneer mutual funds may have the same or similar investment objectives and policies as the fund, their portfolios do not generally consist of the same investments as the fund or each other, and their performance results are likely to differ from those of the fund.

Amundi US has adopted compliance policies and procedures designed to address these potential conflicts of interest, including policies that govern, among other practices, the aggregation and allocation of trades among clients, brokerage allocations, cross trades and best execution.

Personal securities transactions

The fund, Amundi US, and Amundi Distributor US, Inc. have adopted a code of ethics under Rule 17j-1 under the 1940 Act which is applicable to officers, trustees/directors and designated employees of Amundi US and certain of Amundi US's affiliates. The code permits such persons to engage in personal securities transactions for their own accounts, including securities that may be purchased or held by the fund, and is designed to prescribe means reasonably necessary to prevent conflicts of interest from arising in connection with personal securities transactions. The code is on public file with and available from the SEC.

5. Principal underwriter and distribution plan

Principal underwriter

Amundi Distributor US, Inc., 60 State Street, Boston, Massachusetts 02109, is the principal underwriter for the fund in connection with the continuous offering of its shares. Amundi Distributor US, Inc. is an indirect wholly owned subsidiary of Amundi and a wholly owned subsidiary of Amundi Asset Management US, Inc.

The fund entered into an underwriting agreement with Amundi Distributor US, Inc. which provides that Amundi Distributor US, Inc. will bear expenses for the distribution of the fund's shares, except for expenses incurred by Amundi Distributor US, Inc. for which it is reimbursed or compensated by the fund under the distribution plan (discussed below). Amundi Distributor US, Inc. bears all expenses it incurs in providing services under the underwriting agreement. Such expenses include compensation to its employees and representatives and to securities dealers for distribution-related services performed for the fund. Amundi Distributor US, Inc. also pays certain expenses in connection with the distribution of the fund's shares, including the cost of preparing, printing and distributing advertising or promotional materials, and the cost of printing and distributing prospectuses and supplements to prospective shareholders. The fund bears the cost of registering its shares under federal and state securities law and the laws of certain non-U.S. countries. Under the underwriting agreement, Amundi Distributor US, Inc. will use its best efforts in rendering services to the fund.

See "Sales Charges" for the schedule of initial sales charge reallowed to dealers as a percentage of the offering price of the fund's Class A shares.

See the tables under "Annual Fee, Expense and Other Information" for commissions retained by Amundi Distributor

US, Inc. and reallowed to dealers in connection with Amundi Distributor US, Inc.'s offering of the fund's Class A and Class C shares during recently completed fiscal years.

The fund will not generally issue fund shares for consideration other than cash. At the fund's sole discretion, however, it may issue fund shares for consideration other than cash in connection with a bona fide reorganization, statutory merger or other acquisition of portfolio securities.

It is the fund's general practice to repurchase its shares of beneficial interest for cash consideration in any amount; however, the redemption price of shares of the fund may, at Amundi US's discretion, be paid in portfolio securities. The fund has elected to be governed by Rule 18f-1 under the 1940 Act pursuant to which the fund is obligated to redeem shares solely in cash up to the lesser of $250,000 or 1% of the fund's net asset value during any 90-day period for any one shareholder. Should the amount of redemptions by any shareholder exceed such limitation, the fund will have the option of redeeming the excess in cash or portfolio securities. In the latter case, the securities are taken at their value employed in determining the fund's net asset value. You may incur additional costs, such as brokerage fees and taxes, and risks, including a decline in the value of the securities you receive, if the fund makes an in-kind distribution.

Distribution plan

The fund has adopted a distribution plan (the "Distribution Plan") pursuant to Rule 12b-1 under the 1940 Act with respect to its Class A and Class R shares. The fund has not adopted a Distribution Plan with respect to its Class Y shares.

For each Class that has adopted a Distribution Plan, fees under the Distribution Plan may be used to make payments to one or more principal underwriters, broker-dealers, financial intermediaries (which may include banks) and other parties that enter into a distribution, selling or service agreement with respect to the shares of such Class (each of the foregoing, a "Service Party"). The fund, its principal underwriter or other parties also may incur expenses in connection with the distribution or marketing and sales of the fund's shares that may be paid or reimbursed by the fund. The aggregate amount in respect of such fees and expenses with respect to each Class shall be the amount calculated at a percentage per annum of the average daily net assets attributable to such Class as set forth below:

Class	Applicable Percentage Per Annum
Class A	0.15%
Class R	0.50%

Payments are made under the Distribution Plan for distribution services and other activities in respect of the sale of shares of the fund and to make payments for advertising, marketing or other promotional activity, and for preparation, printing, and distribution of prospectuses, statements of additional information and reports for recipients other than regulators and existing shareholders. The fund also may make payments to Service Parties under the Distribution Plan for providing personal service or the maintenance of shareholder accounts. The amounts paid to each recipient may vary based upon certain factors, including, among other things, the levels of sales of fund shares and/or shareholder services provided; provided, however, that the fees paid to a recipient with respect to a particular Class that may be used to cover expenses primarily intended to result in the sale of shares of that Class, or that may be used to cover expenses primarily intended for personal service and/or maintenance of shareholder accounts, may not exceed the maximum amounts, if any, as may from time to time be permitted for such services under the Financial Industry Regulatory Authority ("FINRA") Conduct Rule 2341 or any successor rule, in each case as amended or interpreted by FINRA.

The Distribution Plan also provides that the Service Parties may receive all or a portion of any sales charges paid by investors.

The Distribution Plan permits the fund to pay fees to the Service Parties as compensation for their services, not as reimbursement for specific expenses incurred. Thus, even if their expenses exceed the fees provided for by the Distribution Plan, the fund will not be obligated to pay more than those fees and, if their expenses are less than the fees paid to them, they will realize a profit. The fund may pay the fees to the Service Parties until the Distribution Plan or any related distribution agreement is terminated or not renewed. In that event, a Service Party's expenses in excess of fees received or accrued through the termination date will be such Service Party's sole responsibility and

not obligations of the fund. In their annual consideration of the continuation of the Distribution Plan for the fund, the Trustees will review the Distribution Plan and the expenses for each Class within the fund separately. The fund may participate in joint distribution activities with other Pioneer funds. The costs associated with such joint distribution activities are allocated to a fund based on the number of shares sold.

The Distribution Plan also recognizes that Amundi US, Amundi Distributor US, Inc. or any other Service Party may make payments for distribution-related expenses out of its own resources, including past profits, or payments received from the fund for other purposes, such as management fees, and that the Service Parties may from time to time use their own resources for distribution-related services, in addition to the fees paid under the Distribution Plan. The Distribution Plan specifically provides that, to the extent that such payments might be deemed to be indirect financing of any activity primarily intended to result in the sale of shares of the fund within the context of Rule 12b-1, then the payments are deemed to be authorized by the Distribution Plan but not subject to the maximum amounts set forth above.

Under its terms, the Distribution Plan continues in effect for one year and thereafter for successive annual periods, provided such continuance is specifically approved at least annually by vote of the Board, including a majority of the Independent Trustees who have no direct or indirect financial interest in the operation of the Distribution Plan. The Distribution Plan may not be amended to increase materially the amount of the service and distribution fees without shareholder approval, and all material amendments of the Distribution Plan also must be approved by the Trustees, including all of the Independent Trustees, in the manner described above. The Distribution Plan may be terminated with respect to a Class of the fund at any time, without penalty, by vote of a majority of the Independent Trustees or by vote of a majority of the outstanding voting securities of such Class of the fund (as defined in the 1940 Act).

See "Annual Fee, Expense and Other Information" for fund expenses under the Distribution Plan paid to Amundi Distributor US, Inc. for the most recently completed fiscal year.

As of the close of business on December 31, 2012, Amundi Distributor US, Inc. lowered the Rule 12b-1 fees paid to financial intermediaries on Class A shares of the fund from 0.15% to 0.05%. Effective at the close of business on July 1, 2014, Amundi Distributor US, Inc. lowered the Rule 12b-1 fees paid to financial intermediaries on Class A shares of the fund from 0.05% to 0.00%. Accordingly, Amundi Distributor US, Inc. will waive Rule 12b-1 fees payable by the fund to the same extent.

Service plan for Class R shares

The fund has adopted a service plan (the "Service Plan") with respect to its Class R shares under which the fund is authorized to pay securities dealers, plan administrators or other service organizations who agree to provide certain services to plans or plan participants holding shares of the fund a service fee of up to 0.25% of the fund's average daily net assets attributable to Class R shares held by such plan participants. These services may include (a) acting, directly or through an agent, as the shareholder of record and nominee for all plan participants, (b) maintaining account records for each plan participant that beneficially owns Class R shares, (c) processing orders to purchase, redeem and exchange Class R shares on behalf of plan participants, and handling the transmission of funds representing the purchase price or redemption proceeds, and (d) addressing plan participant questions regarding their accounts and the fund.

6. Shareholder servicing/transfer agent

The fund has contracted with BNY Mellon Investment Servicing (US) Inc., Attention: 534427, 500 Ross Street 154-0520, Pittsburgh, PA 15262, to act as shareholder servicing and transfer agent for the fund.

Under the terms of its contract with the fund, BNY Mellon Investment Servicing (US) Inc. services shareholder accounts, and its duties include: (i) processing sales, redemptions and exchanges of shares of the fund; (ii) distributing dividends and capital gains associated with the fund's portfolio; and (iii) maintaining account records and responding to shareholder inquiries.

7. Custodian and sub-administrator

The Bank of New York Mellon ("BNY Mellon"), 225 Liberty Street, New York, New York 10286, is the custodian of

the fund's assets. The custodian's responsibilities include safekeeping and controlling the fund's cash and securities, handling the receipt and delivery of securities, and collecting interest and dividends on the fund's investments.

BNY Mellon also performs certain fund accounting and fund administration services for the Pioneer Fund complex, including the fund. For performing such services, BNY Mellon receives fees based on complex-wide assets.

8. Independent registered public accounting firm

Ernst & Young LLP, 200 Clarendon Street, Boston, Massachusetts 02116-5072, independent registered public accounting firm, provided audit services, tax return review services, and assistance and consultation with respect to filings with the SEC for the fiscal year ended December 31, 2023. Ernst & Young LLP has resigned as the independent registered public accounting firm of the fund. The fund is in the process of appointing a successor.

9. Portfolio management

Additional information about the portfolio manager

Other accounts managed by the portfolio manager

The table below indicates, for the portfolio manager of the fund, information about the accounts other than the fund over which the portfolio manager has day-to-day investment responsibility. All information on the number of accounts and total assets in the table is as of December 31, 2023. For purposes of the table, "Other Pooled Investment Vehicles" may include investment partnerships, undertakings for collective investments in transferable securities ("UCITS") and other non-U.S. investment funds and group trusts, and "Other Accounts" may include separate accounts for institutions or individuals, insurance company general or separate accounts, pension funds and other similar institutional accounts but generally do not include the portfolio manager's personal investment accounts or those which the manager may be deemed to own beneficially under the code of ethics. Certain funds and other accounts managed by the portfolio manager may have substantially similar investment strategies.

Name of Portfolio Manager	Type of Account	Number of Accounts Managed	Total Assets Managed (000's)	Number of Accounts Managed for which Advisory Fee is Performance- Based	Assets Managed for which Advisory Fee is Performance- Based (000's)
Timothy Rowe	Other Registered Investment Companies	2	$4,623,208	N/A	N/A
	Other Pooled Investment Vehicles	3	$2,490,431	1	$1,774,516
	Other Accounts	20	$9,412,176	1	$957,637
Gregory R. Palmer	Other Registered Investment Companies	0	$0	N/A	N/A
	Other Pooled Investment Vehicles	0	$0	N/A	N/A
	Other Accounts	4	$89,498	N/A	N/A

Potential conflicts of interest

When a portfolio manager is responsible for the management of more than one account, the potential arises for the portfolio manager to favor one account over another. The principal types of potential conflicts of interest that may arise are discussed below. For the reasons outlined below, Amundi US does not believe that any material conflicts are likely to arise out of a portfolio manager's responsibility for the management of the fund as well as one or more other accounts. Although Amundi US has adopted procedures that it believes are reasonably designed to detect and prevent violations of the federal securities laws and to mitigate the potential for conflicts of interest to affect its portfolio management decisions, there can be no assurance that all conflicts will be identified or that all procedures will be effective in mitigating the potential for such risks. Generally, the risks of such conflicts of interest are increased to the extent that a portfolio manager has a financial incentive to favor one account over another. Amundi US has structured its compensation arrangements in a manner that is intended to limit such potential for conflicts of

interest. See "Compensation of Portfolio Managers" below.

•

A portfolio manager could favor one account over another in allocating new investment opportunities that have limited supply, such as initial public offerings and private placements. If, for example, an initial public offering that was expected to appreciate in value significantly shortly after the offering was allocated to a single account, that account may be expected to have better investment performance than other accounts that did not receive an allocation of the initial public offering. Generally, investments for which there is limited availability are allocated based upon a range of factors including available cash and consistency with the accounts' investment objectives and policies. This allocation methodology necessarily involves some subjective elements but is intended over time to treat each client in an equitable and fair manner. Generally, the investment opportunity is allocated among participating accounts on a pro rata basis. Although Amundi US believes that its practices are reasonably designed to treat each client in an equitable and fair manner, there may be instances where a fund may not participate, or may participate to a lesser degree than other clients, in the allocation of an investment opportunity.

•

A portfolio manager could favor one account over another in the order in which trades for the accounts are placed. If a portfolio manager determines to purchase a security for more than one account in an aggregate amount that may influence the market price of the security, accounts that purchased or sold the security first may receive a more favorable price than accounts that made subsequent transactions. The less liquid the market for the security or the greater the percentage that the proposed aggregate purchases or sales represent of average daily trading volume, the greater the potential for accounts that make subsequent purchases or sales to receive a less favorable price. When a portfolio manager intends to trade the same security on the same day for more than one account, the trades typically are "bunched," which means that the trades for the individual accounts are aggregated and each account receives the same price. There are some types of accounts as to which bunching may not be possible for contractual reasons (such as directed brokerage arrangements). Circumstances may also arise where the trader believes that bunching the orders may not result in the best possible price. Where those accounts or circumstances are involved, Amundi US will place the order in a manner intended to result in as favorable a price as possible for such client.

•

A portfolio manager could favor an account if the portfolio manager's compensation is tied to the performance of that account to a greater degree than other accounts managed by the portfolio manager. If, for example, the portfolio manager receives a bonus based upon the performance of certain accounts relative to a benchmark while other accounts are disregarded for this purpose, the portfolio manager will have a financial incentive to seek to have the accounts that determine the portfolio manager's bonus achieve the best possible performance to the possible detriment of other accounts. Similarly, if Amundi US receives a performance-based advisory fee, the portfolio manager may favor that account, whether or not the performance of that account directly determines the portfolio manager's compensation.

•

A portfolio manager could favor an account if the portfolio manager has a beneficial interest in the account, in order to benefit a large client or to compensate a client that had poor returns. For example, if the portfolio manager held an interest in an investment partnership that was one of the accounts managed by the portfolio manager, the portfolio manager would have an economic incentive to favor the account in which the portfolio manager held an interest.

•

If the different accounts have materially and potentially conflicting investment objectives or strategies, a conflict of interest could arise. For example, if a portfolio manager purchases a security for one account and sells the same security for another account, such trading pattern may disadvantage either the account that is long or short. In making portfolio manager assignments, Amundi US seeks to avoid such potentially conflicting situations. However, where a portfolio manager is responsible for accounts with differing investment objectives and policies, it is possible that the portfolio manager will conclude that it is in the best interest of one account to sell a portfolio security while another account continues to hold or increase the holding in such security.

Compensation of portfolio manager

Amundi US has adopted a system of compensation for portfolio managers that seeks to align the financial interests of the portfolio managers with those of shareholders of the accounts (including Pioneer funds) the portfolio managers manage, as well as with the financial performance of Amundi US. The compensation program for all Amundi US portfolio managers includes a base salary (determined by the rank and tenure of the employee) and an annual bonus program, as well as customary benefits that are offered generally to all full-time employees. Base

compensation is fixed and normally reevaluated on an annual basis. Amundi US seeks to set base compensation at market rates, taking into account the experience and responsibilities of the portfolio manager. The bonus plan is intended to provide a competitive level of annual bonus compensation that is tied to the portfolio manager achieving superior investment performance and align the interests of the investment professional with those of shareholders, as well as with the financial performance of Amundi US. Any bonus under the plan is completely discretionary, with a maximum annual bonus that may be in excess of base salary. The annual bonus is based upon a combination of the following factors:

•

Quantitative investment performance.The quantitative investment performance calculation is based on pre-tax investment performance of all of the accounts managed by the portfolio manager (which includes the fund and any other accounts managed by the portfolio manager) over a one-year period (20% weighting) and four-year period (80% weighting), measured for periods ending on December 31. The accounts, which include the fund, are ranked against a group of mutual funds with similar investment objectives and investment focus (60%) and against the performance of the same type of securities in which the accounts invest (40%), which, in the case of the fund, is a Treasury Bill of similar maturity. As a result of these two benchmarks, the performance of the portfolio manager for compensation purposes is measured against the criteria that are relevant to the portfolio manager's competitive universe.

•

Qualitative performance.The qualitative performance component with respect to all of the accounts managed by the portfolio manager includes objectives, such as effectiveness in the areas of teamwork, leadership, communications and marketing, that are mutually established and evaluated by each portfolio manager and management.

•

Pioneer results and business line results.Pioneer's financial performance, as well as the investment performance of its investment management group, affect a portfolio manager's actual bonus by a leverage factor of plus or minus (+/-) a predetermined percentage.

The quantitative and qualitative performance components comprise 80% and 20%, respectively, of the overall bonus calculation (on a pre-adjustment basis). A portion of the annual bonus is deferred for a specified period and may be invested in one or more Pioneer funds.

Certain portfolio managers may participate in other programs designed to reward and retain key contributors. Portfolio managers also may participate in a deferred compensation program, whereby deferred amounts are invested in one or more Pioneer funds or collective investment trusts or other unregistered funds with similar investment objectives, strategies and policies.

Share ownership by portfolio manager

The following table indicates as of December 31, 2023 the value, within the indicated range, of shares beneficially owned by the portfolio manager of the fund.

Name of Portfolio Manager	Beneficial Ownership of the Fund*
Timothy Rowe	A
Gregory R. Palmer	A**

Key to Dollar Ranges

A.	None
B.	$1 - $10,000
C.	$10,001 - $50,000
D.	$50,001 - $100,000
E.	$100,001 - $500,000
F.	$500,001 - $1,000,000
G.	Over $1,000,000

In addition to the amounts included above, as of December 31, 2023, Gregory R. Palmer also participated in a deferred compensation arrangement, pursuant to which the value of a portion of the deferral account varies based on the performance of the fund. If the analysis above included the amounts attributable to the deferral arrangement, the level of investment would be letter D.

10. Portfolio transactions

All orders for the purchase or sale of portfolio securities are placed on behalf of the fund by Amundi US pursuant to authority contained in the fund's management contract. Securities purchased and sold on behalf of the fund normally will be traded in the over-the-counter market on a net basis (i.e., without commission) through dealers acting for their own account and not as brokers or otherwise through transactions directly with the issuer of the instrument. The cost of securities purchased from underwriters includes an underwriter's commission or concession, and the prices at which securities are purchased and sold from and to dealers include a dealer's markup or markdown. Amundi US normally seeks to deal directly with the primary market makers unless, in its opinion, better prices are available elsewhere. Amundi US seeks to obtain overall best execution on portfolio trades. The price of securities and any commission rate paid are always factors, but frequently not the only factors, in judging best execution. In selecting brokers or dealers, Amundi US considers various relevant factors, including, but not limited to, the size and type of the transaction; the nature and character of the markets for the security to be purchased or sold; the execution efficiency, settlement capability and financial condition of the dealer; the dealer's execution services rendered on a continuing basis; and the reasonableness of any dealer spreads. Transactions in non-U.S. equity securities are executed by broker-dealers in non-U.S. countries in which commission rates may not be negotiable (as such rates are in the U.S.).

Amundi US may select broker-dealers that provide brokerage and/or research services to the fund and/or other investment companies or other accounts managed by Amundi US over which it or its affiliates exercise investment discretion. In addition, consistent with Section 28(e) of the Securities Exchange Act of 1934, as amended, if Amundi US determines in good faith that the amount of commissions charged by a broker-dealer is reasonable in relation to the value of the brokerage and research services provided by such broker, the fund may pay commissions to such broker-dealer in an amount greater than the amount another firm may charge. Such services may include advice concerning the value of securities; the advisability of investing in, purchasing or selling securities; the availability of securities or the purchasers or sellers of securities; providing stock quotation services, credit rating service information and comparative fund statistics; furnishing analyses, electronic information services, manuals and reports concerning issuers, industries, securities, economic factors and trends, portfolio strategy, and performance of accounts and particular investment decisions; and effecting securities transactions and performing functions incidental thereto (such as clearance and settlement). Amundi US maintains a listing of broker-dealers who provide such services on a regular basis. However, because many transactions on behalf of the fund and other investment companies or accounts managed by Amundi US are placed with broker-dealers (including broker-dealers on the listing) without regard to the furnishing of such services, it is not possible to estimate the proportion of such transactions directed to such dealers solely because such services were provided. Amundi US believes that no exact dollar value can be calculated for such services.

The research received from broker-dealers may be useful to Amundi US in rendering investment management services to the fund as well as other investment companies or other accounts managed by Amundi US, although not all such research may be useful to the fund. Conversely, such information provided by brokers or dealers who have executed transaction orders on behalf of such other accounts may be useful to Amundi US in carrying out its obligations to the fund. The receipt of such research enables Amundi US to avoid the additional expenses that might otherwise be incurred if it were to attempt to develop comparable information through its own staff.

The fund may participate in third-party brokerage and/or expense offset arrangements to reduce the fund's total operating expenses. Pursuant to third-party brokerage arrangements, the fund may incur lower expenses by directing brokerage to third-party broker-dealers which have agreed to use part of their commission to pay the fund's fees to service providers unaffiliated with Amundi US or other expenses. Since the commissions paid to the third party brokers reflect a commission cost that the fund would generally expect to incur on its brokerage transactions but not necessarily the lowest possible commission, this arrangement is intended to reduce the fund's operating expenses without increasing the cost of its brokerage commissions. Since use of such directed brokerage is subject to the requirement to achieve best execution in connection with the fund's brokerage transactions, there can be no assurance that such arrangements will be utilized. Pursuant to expense offset arrangements, the fund may incur lower transfer agency expenses due to interest earned on cash held with the transfer agent. See "Financial highlights" in the prospectus.

See the table in "Annual Fee, Expense and Other Information" for aggregate brokerage and underwriting commissions paid by the fund in connection with its portfolio transactions during recently completed fiscal years. The Board of Trustees periodically reviews Amundi US's performance of its responsibilities in connection with the placement of portfolio transactions on behalf of the fund.

11. Description of shares

As an open-end management investment company, the fund continuously offers its shares to the public and under normal conditions must redeem its shares upon the demand of any shareholder at the next determined net asset value per share less any applicable contingent deferred sales charge ("CDSC"). See "Sales Charges." When issued and paid for in accordance with the terms of the prospectus and statement of additional information, shares of the fund are fully paid and non-assessable. Shares will remain on deposit with the fund's transfer agent and certificates will not normally be issued.

The fund is a series of Pioneer Money Market Trust, a Delaware statutory trust. The Trustees have authorized the issuance of the following classes of shares of the fund, designated as Class A, Class C, Class R and Class Y shares. No Class C shares are outstanding as of the date of this statement of additional information. Each share of a class of the fund represents an equal proportionate interest in the assets of the fund allocable to that class. Upon liquidation of the fund, shareholders of each class of the fund are entitled to share pro rata in the fund's net assets allocable to such class available for distribution to shareholders. The Trust reserves the right to create and issue additional series or classes of shares, in which case the shares of each class of a series would participate equally in the earnings, dividends and assets allocable to that class of the particular series.

The shares of each class represent an interest in the same portfolio of investments of the fund. Each class has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends by each class. Share classes have exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class.

The Trust

The Trust's operations are governed by the Amended and Restated Agreement and Declaration of Trust, dated as of January 12, 2016 (referred to in this section as the declaration). A copy of the Trust's Certificate of Trust dated as of March 7, 1995, is on file with the office of the Secretary of State of Delaware.

Delaware law provides a statutory framework for the powers, duties, rights and obligations of the board (referred to in this section as the trustees) and shareholders of the Delaware statutory trust, while the more specific powers, duties, rights and obligations of the trustees and the shareholders are determined by the trustees as set forth in the declaration. Some of the more significant provisions of the declaration are described below.

Shareholder voting

The declaration provides for shareholder voting as required by the 1940 Act or other applicable laws but otherwise permits, consistent with Delaware law, actions by the trustees without seeking the consent of shareholders. The trustees may, without shareholder approval, where approval of shareholders is not otherwise required under the 1940 Act, merge or consolidate the Trust into other entities, reorganize the Trust or any series or class into another trust or entity or a series or class of another entity, sell the assets of the Trust or any series or class to another entity, or a series or class of another entity, or terminate the Trust or any series or class.

The fund is not required to hold an annual meeting of shareholders, but the fund will call special meetings of shareholders whenever required by the 1940 Act or by the terms of the declaration. The declaration gives the board the flexibility to specify either per share voting or dollar-weighted voting. Under per share voting, each share of the fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined, not by the number of shares the shareholder owns, but by the dollar value of those shares determined on the record date. All shareholders of all series and classes of the Trust vote together, except where required by the 1940 Act to vote separately by series or by class, or when the trustees have determined that a matter affects only the interests of one or

more series or classes of shares.

Election and removal of trustees

The declaration provides that the trustees may establish the number of trustees and that vacancies on the board may be filled by the remaining trustees, except when election of trustees by the shareholders is required under the 1940 Act. Trustees are then elected by a plurality of votes cast by shareholders at a meeting at which a quorum is present. The declaration also provides that a mandatory retirement age may be set by action of two-thirds of the trustees and that trustees may be removed at any time or for any reason by a majority of the board or by a majority of the outstanding shareholders of the Trust.

Amendments to the declaration

The trustees are authorized to amend the declaration without the vote of shareholders, but no amendment may be made that impairs the exemption from personal liability granted in the declaration to persons who are or have been shareholders, trustees, officers or, employees of the trust or that limit the rights to indemnification or insurance provided in the declaration with respect to actions or omissions of persons entitled to indemnification under the declaration prior to the amendment.

Issuance and redemption of shares

The fund may issue an unlimited number of shares for such consideration and on such terms as the trustees may determine. Shareholders are not entitled to any appraisal, preemptive, conversion, exchange or similar rights, except as the trustees may determine. The fund may involuntarily redeem a shareholder's shares upon certain conditions as may be determined by the trustees, including, for example, if the shareholder fails to provide the fund with identification required by law, or if the fund is unable to verify the information received from the shareholder. Additionally, as discussed below, shares may be redeemed in connection with the closing of small accounts.

Disclosure of shareholder holdings

The declaration specifically requires shareholders, upon demand, to disclose to the fund information with respect to the direct and indirect ownership of shares in order to comply with various laws or regulations, and the fund may disclose such ownership if required by law or regulation.

Small accounts

The declaration provides that the fund may close out a shareholder's account by redeeming all of the shares in the account if the account falls below a minimum account size (which may vary by class) that may be set by the trustees from time to time. Alternately, the declaration permits the fund to assess a fee for small accounts (which may vary by class) and redeem shares in the account to cover such fees, or convert the shares into another share class that is geared to smaller accounts.

Series and classes

The declaration provides that the trustees may establish series and classes in addition to those currently established and to determine the rights and preferences, limitations and restrictions, including qualifications for ownership, conversion and exchange features, minimum purchase and account size, expenses and charges, and other features of the series and classes. The trustees may change any of those features, terminate any series or class, combine series with other series in the trust, combine one or more classes of a series with another class in that series or convert the shares of one class into another class.

Each share of the fund, as a series of the Trust, represents an interest in the fund only and not in the assets of any other series of the Trust.

Shareholder, trustee and officer liability

The declaration provides that shareholders are not personally liable for the obligations of the fund and requires a fund to indemnify a shareholder against liability arising solely from the shareholder's ownership of shares in the fund. In addition, the fund will assume the defense of any claim against a shareholder for personal liability at the request of the shareholder. The declaration also provides that no Trustee, officer or employee of the Trust owes any

duty to any person (including without limitation any shareholder), other than the Trust or any series. The declaration further provides that no trustee, officer or employee of the fund shall be liable to the fund or any shareholder for any action, failure to act, error or mistake except in cases of bad faith, willful misfeasance, gross negligence or reckless disregard of duty. The declaration requires the fund to indemnify each trustee, director, officer, employee and authorized agent to the fullest extent permitted by law against liability and against all expenses reasonably incurred or paid by him in connection with any claim, action, suit or proceeding in which he becomes involved as a party or otherwise by virtue of his being or having been such a trustee, director, officer, employee, or agent and against amounts paid or incurred by him in settlement thereof. The 1940 Act currently provides that no officer or director shall be protected from liability to the fund or shareholders for willful misfeasance, bad faith, gross negligence, or reckless disregard of the duties of office. The declaration extends to trustees, officers and employees of the fund the full protection from liability that the law allows.

The declaration provides that the appointment, designation or identification of a trustee as chairperson, a member of a committee, an expert, lead independent trustee, or any other special appointment, designation or identification shall not impose any heightened standard of care or liability on such trustee.

Derivative and direct actions

The declaration provides a detailed process for the bringing of derivative or direct actions by shareholders in order to permit legitimate inquiries and claims while avoiding the time, expense, distraction, and other harm that can be caused to the fund or its shareholders as a result of spurious shareholder demands and derivative actions. Prior to bringing a derivative action, a demand by three unrelated shareholders must first be made on the fund's trustees. The declaration details various information, certifications, undertakings and acknowledgements that must be included in the demand. Following receipt of the demand, the trustees have a period of 90 days, which may be extended by an additional 60 days, to consider the demand. If a majority of the trustees who are considered independent for the purposes of considering the demand determine that maintaining the suit would not be in the best interests of the fund, the trustees are required to reject the demand and the complaining shareholders may not proceed with the derivative action unless the shareholders are able to sustain the burden of proof to a court that the decision of the trustees not to pursue the requested action was not a good faith exercise of their business judgment on behalf of the fund. The declaration further provides that shareholders owning shares representing at least 10% of the voting power of the affected fund must join in bringing the derivative action. If a demand is rejected, the complaining shareholders will be responsible for the costs and expenses (including attorneys' fees) incurred by the fund in connection with the consideration of the demand, if a court determines that the demand was made without reasonable cause or for an improper purpose. If a derivative action is brought in violation of the declaration, the shareholders bringing the action may be responsible for the fund's costs, including attorneys' fees, if a court determines that the action was brought without reasonable cause or for an improper purpose.

The declaration provides that no shareholder may bring a direct action claiming injury as a shareholder of the Trust, or any series or class thereof, where the matters alleged (if true) would give rise to a claim by the Trust or by the Trust on behalf of a series or class, unless the shareholder has suffered an injury distinct from that suffered by the shareholders of the Trust, or the series or class, generally. Under the declaration, a shareholder bringing a direct claim must be a shareholder of the series or class with respect to which the direct action is brought at the time of the injury complained of, or have acquired the shares afterwards by operation of law from a person who was a shareholder at that time.

The declaration further provides that the fund shall be responsible for payment of attorneys' fees and legal expenses incurred by a complaining shareholder only if required by law, and any attorneys' fees that the fund is obligated to pay shall be calculated using reasonable hourly rates. The declaration also requires that actions by shareholders against the fund be brought only in federal court in Boston, Massachusetts, or if not permitted to be brought in federal court, then in state court in Boston, Massachusetts, and that shareholders have no right to jury trial for such actions.

The declaration also provides that shareholders have no rights, privileges, claims or remedies under any contract or agreement entered into by the Trust with any service provider or other agent or contract with the Trust, including, without limitation, any third party beneficiary rights, except as may be expressly provided in any service contract or agreement.

12. Sales charges

The fund continuously offers the following classes of shares: Class A, Class R and Class Y shares, as described in the prospectus.

Class A share sales charges

You may buy Class A shares at the net asset value per share next computed after receipt of a purchase order without the imposition of an initial sales charge. There is no contingent deferred sales charge on the sale of fund shares you purchase. However, if you exchange shares of another Pioneer mutual fund for shares of the fund, any contingent deferred sales charge that applied to your shares of the other Pioneer mutual fund at the time of the exchange will continue to apply to your shares of the fund after the exchange. When you ultimately sell your shares of the fund, the date of your original purchase of shares of the other Pioneer mutual fund will determine your contingent deferred sales charge.

Class R shares

You may buy Class R shares at the net asset value per share next computed after receipt of a purchase order without the imposition of an initial sales charge or CDSC.

Class R shares are available to certain tax-deferred retirement plans (including 401(k) plans, employer-sponsored 403(b) plans, 457 plans, profit sharing and money purchase pension plans, defined benefit plans and non-qualified deferred compensation plans) held in plan level or omnibus accounts. Class R shares also are available to individual retirement account rollovers from eligible retirement plans that offered one or more Pioneer funds as investment options. Class R shares generally are not available to non-retirement accounts, traditional and Roth IRA's, Coverdell Education Savings Accounts, SEP's, SAR-SEP's, Simple IRA's, individual 403(b)'s or retirement plans that are not subject to the Employee Retirement Income Security Act of 1974.

Investors that are eligible to purchase Class R shares may also be eligible to purchase other share classes. Your investment professional can help you determine which class is appropriate. You should ask your investment professional if you qualify for a waiver of sales charges on another class and take that into consideration when selecting a class of shares. Your investment firm may receive different compensation depending upon which class is chosen.

Class Y shares

No front-end, deferred or asset-based sales charges are applicable to Class Y shares. However, if you invest in Class Y shares through an investment professional or financial intermediary, that investment professional or financial intermediary may charge you a commission in an amount determined and separately disclosed to you by that investment professional or financial intermediary. The fund waives the investment minimum for Class Y shares for direct share purchases by Amundi US employees and Trustees of the fund through its transfer agent.

Additional payments to financial intermediaries

The financial intermediaries through which shares are purchased may receive all or a portion of the sales charges and Rule 12b-1 fees, if any, discussed above. In addition to those payments, Amundi US or one or more of its affiliates (collectively, "Amundi US Affiliates") may make additional payments to financial intermediaries in connection with the promotion and sale of shares of Pioneer funds. Amundi US Affiliates make these payments from their own resources, which include resources that derive from compensation for providing services to the Pioneer funds. These additional payments are described below. The categories described below are not mutually exclusive. The same financial intermediary may receive payments under more than one or all categories. Many financial intermediaries that sell shares of Pioneer funds receive one or more types of these payments. The financial intermediary typically initiates requests for additional compensation. Amundi US negotiates these arrangements individually with financial intermediaries and the amount of payments and the specific arrangements may differ significantly. A financial intermediary also may receive different levels of compensation with respect to sales or assets attributable to different types of clients of the same intermediary or different Pioneer funds. Where services are provided, the costs of providing the services and the overall array of services provided may vary from one financial intermediary to another. Amundi US Affiliates do not make an independent assessment of the cost of

providing such services. While the financial intermediaries may request additional compensation from Amundi US to offset costs incurred by the financial intermediary in servicing its clients, the financial intermediary may earn a profit on these payments, since the amount of the payment may exceed the financial intermediary's costs. In this context, "financial intermediary" includes any broker, dealer, bank (including bank trust departments), insurance company, transfer agent, registered investment adviser, financial planner, retirement plan administrator and any other financial intermediary having a selling, administrative and shareholder servicing or similar agreement with an Amundi US Affiliate.

A financial intermediary's receipt of additional compensation may create conflicts of interest between the financial intermediary and its clients. Each type of payment discussed below may provide your financial intermediary with an economic incentive to actively promote the Pioneer funds over other mutual funds or cooperate with the distributor's promotional efforts. The receipt of additional compensation for Amundi US Affiliates may be an important consideration in a financial intermediary's willingness to support the sale of the Pioneer funds through the financial intermediary's distribution system. Amundi US Affiliates are motivated to make the payments described above since they promote the sale of Pioneer fund shares and the retention of those investments by clients of financial intermediaries. In certain cases these payments could be significant to the financial intermediary. The financial intermediary may charge additional fees or commissions other than those disclosed in the prospectus and statement of additional information. Financial intermediaries may categorize and disclose these arrangements differently than Amundi US Affiliates do. To the extent financial intermediaries sell more shares of the funds or retain shares of the funds in their clients' accounts, Amundi US Affiliates benefit from the incremental management and other fees paid to Amundi US Affiliates by the funds with respect to those assets.

Revenue sharing payments

Amundi US Affiliates make revenue sharing payments as incentives to certain financial intermediaries to promote and sell shares of Pioneer funds. The benefits Amundi US Affiliates receive when they make these payments include, among other things, entry into or increased visibility in the financial intermediary's sales system, participation by the intermediary in the distributor's marketing efforts (such as helping facilitate or providing financial assistance for conferences, seminars or other programs at which Amundi US personnel may make presentations on the funds to the intermediary's sales force), placement on the financial intermediary's preferred fund list, and access (in some cases, on a preferential basis over other competitors) to individual members of the financial intermediary's sales force or management. Revenue sharing payments are sometimes referred to as "shelf space" payments because the payments compensate the financial intermediary for including Pioneer funds in its fund sales system (on its "shelf space"). Amundi US Affiliates also may pay financial intermediaries "finders'" or "referral" fees for directing investors to the Pioneer funds. Amundi US Affiliates compensate financial intermediaries differently depending typically on the level and/or type of considerations provided by the financial intermediary.

The revenue sharing payments Amundi US Affiliates make may be calculated on sales of shares of Pioneer funds ("Sales-Based Payments"); although there is no policy limiting the amount of Sales-Based Payments any one financial intermediary may receive, the total amount of such payments normally does not exceed 0.25% per annum of those assets. Such payments also may be calculated on the average daily net assets of the applicable Pioneer funds attributable to that particular financial intermediary ("Asset-Based Payments"); although there is no policy limiting the amount of Asset-Based Payments any one financial intermediary may receive, the total amount of such payments normally does not exceed 0.16% per annum of those assets. Sales-Based Payments primarily create incentives to make new sales of shares of Pioneer funds and Asset-Based Payments primarily create incentives to retain previously sold shares of Pioneer funds in investor accounts. Amundi US Affiliates may pay a financial intermediary either or both Sales-Based Payments and Asset-Based Payments.

Administrative and processing support payments

Amundi US Affiliates also may make payments to certain financial intermediaries that sell Pioneer fund shares for certain administrative services, including record keeping and sub-accounting shareholder accounts, to the extent that the funds do not pay for these costs directly. Amundi US Affiliates also may make payments to certain financial intermediaries that sell Pioneer fund shares in connection with client account maintenance support, statement preparation and transaction processing. The types of payments that Amundi US Affiliates may make under this category include, among others, payment of ticket charges per purchase or exchange order placed by a financial intermediary, payment of networking fees in connection with certain mutual fund trading systems, or one-time

payments for ancillary services such as setting up funds on a financial intermediary's mutual fund trading system.

Other payments

From time to time, Amundi US Affiliates, at their expense, may provide additional compensation to financial intermediaries which sell or arrange for the sale of shares of the Pioneer funds. Such compensation provided by Amundi US Affiliates may include financial assistance to financial intermediaries that enable Amundi US Affiliates to participate in and/or present at conferences or seminars, sales or training programs for invited registered representatives and other employees, client entertainment, client and investor events, and other financial intermediary-sponsored events, and travel expenses, including lodging incurred by registered representatives and other employees in connection with client prospecting, retention and due diligence trips. Other compensation may be offered to the extent not prohibited by federal or state laws or any self-regulatory agency, such as FINRA. Amundi US Affiliates make payments for entertainment events they deem appropriate, subject to Amundi US Affiliates' guidelines and applicable law. These payments may vary depending upon the nature of the event or the relationship. Amundi US Affiliates also may make payments to financial intermediaries for detailed information about the intermediaries' activities relating to the Pioneer funds.

As of January 1, 2024, Amundi US anticipates that the following broker-dealers or their affiliates will receive additional payments as described in the prospectus and statement of additional information:

ADP Retirement Services
AIG
Alight Financial Solutions, LLC
Ameriprise Financial Services, Inc.
Ascensus Broker Dealer Services, Inc
BNY Mellon
Cetera Advisors LLC
Charles Schwab & Co., Inc.
Citigroup Global Markets Inc.
Commonwealth Financial Network
Edward Jones
Empower
Equitable Advisors.LLC
Fidelity Brokerage Services LLC
First Command Financial Planning, Inc.
Hartford Securities Distribution Company, Inc.
J.P. Morgan Securities LLC
John Hancock
Lincoln Financial
LPL Financial Corp.
Merrill Lynch & Co., Inc.
Mid Atlantic Capital Corporation
Morgan Stanley & Co., Inc.
MSCS Financial Services, LLC
Mutual of Omaha Investor Services, Inc.
N.I.S. Financial Services, Inc.
National Financial Services LLC
Nationwide Securities, Inc.
Northwestern Investment Services, LLC
NYLife Securities, LLC
OneAmerica Securities, Inc.
Oppenheimer & Co., Inc.
Osaic
Pershing LLC
PFS Investments Inc.

Principal Securities, Inc.
Prudential Financial
Raymond James Financial Services, Inc.
RBC Dain Rauscher Inc.
Sammons Financial Network LLC
Security Distributors
Standard Life Investments Securities LLC
TD Ameritrade, Inc.
TIAA-CREF Individual & Institutional Services, LLC
T. Rowe Price Investment Services, Inc.
Transamerica Financial Advisors, Inc.
UBS Financial Services Inc.
USI Securities, Inc.
Valic Financial Advisors, Inc.
Vanguard Marketing Corporation
Voya Financial Partners, LLC
Wells Fargo Investments, LLC

Please contact your financial intermediary for details about any payments it receives from Amundi US Affiliates or the funds, as well as about fees and/or commissions it charges.

13. Redeeming shares

Redemptions may be suspended or payment postponed during any period in which any of the following conditions exist: the New York Stock Exchange (the "Exchange") is closed or trading on the Exchange is restricted; an emergency exists as a result of which disposal by the fund of securities owned by it is not reasonably practicable or it is not reasonably practicable for the fund to fairly determine the value of the net assets of its portfolio; or otherwise as permitted by the rules of or by the order of the SEC.

The fund may effect redemptions in kind in an effort to manage cash positions and/or for liquidity management, portfolio management and other purposes. This practice may reduce the need for the fund to sell portfolio holdings to meet redemption requests and thus may enable such funds to reduce cash drag, transaction costs and recognized capital gains. Amundi US believes that this practice may benefit the fund and its shareholders, including the possibility of reducing the amount of capital gain distributions to their shareholders. In some cases, the fund will distribute a large amount of securities in proportion to their representation in the fund's portfolio whereas in other cases Amundi US may select, or give greater weight to, specific securities as a means of their disposition.

Redemptions and repurchases are taxable transactions for shareholders that are subject to U.S. federal income tax, but such shareholders will not have any gain or loss upon redemptions or repurchases so long as the fund maintains a net asset value of $1.00 per share

Systematic withdrawal plan(s) ("SWP") (Class A and Class R shares)

A SWP is designed to provide a convenient method of receiving fixed payments at regular intervals from fund share accounts having a total value of not less than $10,000. You must also be reinvesting all dividends and capital gain distributions to use the SWP option.

Periodic payments will be deposited monthly, quarterly, semiannually or annually directly into a bank account designated by the applicant or will be sent by check to the applicant, or any person designated by the applicant. Payments can be made either by check or electronic funds transfer to a bank account designated by you. Withdrawals from Class R accounts are limited to 10% of the value of the account at the time the SWP is established. See "Qualifying for a reduced sales charge" in the prospectus. If you direct that withdrawal payments be paid to another person, want to change the bank where payments are sent or designate an address that is different from the account's address of record after you have opened your account, a medallion signature guarantee must accompany your instructions. Withdrawals under the SWP are redemptions that may have tax consequences for you.

While you are making systematic withdrawals from your account, you may pay unnecessary initial sales charges on

additional purchases of Class A shares or contingent deferred sales charges. SWP redemptions reduce and may ultimately exhaust the number of shares in your account. In addition, the amounts received by a shareholder cannot be considered as yield or income on his or her investment because part of such payments may be a return of his or her investment.

A SWP may be terminated at any time (1) by written notice to the fund or from the fund to the shareholder; (2) upon receipt by the fund of appropriate evidence of the shareholder's death; or (3) when all shares in the shareholder's account have been redeemed.

You may obtain additional information by calling the fund at 1-800-225-6292.

Reinstatement privilege (Class A shares)

Subject to the provisions outlined in the prospectus, you may reinvest all or part of your sale proceeds from Class A shares without a sales charge into Class A shares of a Pioneer mutual fund. However, the distributor will not pay your investment firm a commission on any reinvested amount.

14. Telephone and online transactions

You may purchase, exchange or sell shares by telephone or online. See the prospectus for more information. For personal assistance, call 1-800-225-6292 between 8:00 a.m. and 7:00 p.m. Eastern time on weekdays. Computer-assisted telephone transactions may be available to shareholders who have prerecorded certain bank information (see "FactFoneSM"). You are strongly urged to consult with your investment professional prior to requesting any telephone or online transaction.

Telephone transaction privileges

To confirm that each transaction instruction received by telephone is genuine, the fund will record each telephone transaction, require the caller to provide validating information for the account and send you a written confirmation of each telephone transaction. Different procedures may apply to accounts that are registered to non-U.S. citizens or that are held in the name of an institution or in the name of an investment broker-dealer or other third party. If reasonable procedures, such as those described above, are not followed, the fund may be liable for any loss due to unauthorized or fraudulent instructions. The fund may implement other procedures from time to time. In all other cases, neither the fund, the fund's transfer agent nor Amundi Distributor US, Inc. will be responsible for the authenticity of instructions received by telephone; therefore, you bear the risk of loss for unauthorized or fraudulent telephone transactions.

Online transaction privileges

If your account is registered in your name, you may be able buy, exchange or sell fund shares online. Your investment firm may also be able to buy, exchange or sell your fund shares online.

To establish online transaction privileges:

•

For new accounts, complete the online section of the account application

•

For existing accounts, complete an account options form, write to the fund or complete the online authorization screen on amundi.com/us

To use online transactions, you must read and agree to the terms of an online transaction agreement available on the Amundi US website. When you or your investment firm requests an online transaction the transfer agent electronically records the transaction, requires an authorizing password and sends a written confirmation. The fund may implement other procedures from time to time. Different procedures may apply if you have a non-U.S. account or if your account is registered in the name of an institution, broker-dealer or other third party. You may not be able to use the online transaction privilege for certain types of accounts, including most retirement accounts.

Telephone and website online access

You may have difficulty contacting the fund by telephone or accessing amundi.com/us during times of market volatility or disruption in telephone or Internet services. On Exchange holidays or on days when the Exchange closes

early, Amundi US will adjust the hours for the telephone center and for online transaction processing accordingly. If you are unable to access amundi.com/us or to reach the fund by telephone, you should communicate with the fund in writing.

FactFoneSM

FactFoneSMis an automated inquiry and telephone transaction system available to Pioneer mutual fund shareholders by dialing 1-800-225-4321. FactFoneSMallows shareholder access to current information on Pioneer mutual fund accounts and to the prices of all publicly available Pioneer mutual funds. In addition, you may use FactFoneSMto make computer-assisted telephone purchases, exchanges or redemptions from your Pioneer mutual fund accounts, access your account balances and last three transactions and order a duplicate statement if you have activated your PIN. Telephone purchases or redemptions require the establishment of a bank account of record. You are strongly urged to consult with your investment professional prior to requesting any telephone transaction. Shareholders whose accounts are registered in the name of a broker-dealer or other third party may not be able to use FactFoneSM. Call the fund at 1-800-225-6292 for assistance.

FactFoneSMallows shareholders to hear the following recorded fund information:

•

net asset value prices for all Pioneer mutual funds;

•

dividends and capital gain distributions on all Pioneer mutual funds.

The value of each class of shares (except for Pioneer U.S. Government Money Market Fund, which seeks to maintain a stable $1.00 share price) will also vary, and such shares may be worth more or less at redemption than their original cost.

15. Pricing of shares

The net asset value per share of each class of the fund is determined twice daily, every day the Exchange is open, at 1:00 p.m. Eastern time and as of the close of regular trading on the Exchange (normally 4:00 p.m. Eastern time). As of the date of this statement of additional information, the Exchange is open for trading every weekday except for the days that the following holidays are observed: New Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Good Friday, Memorial Day, Juneteenth National Independence Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day. The fund is not required to determine its net asset value per share on any day on which no purchase orders in good order for fund shares are received and no shares are tendered and accepted for redemption.

The net asset value per share of each class of the fund is computed by taking the value of all of the fund's assets attributable to a class, less the fund's liabilities attributable to that class, and dividing the result by the number of outstanding shares of that class. For purposes of determining net asset value, expenses of the classes of the fund are accrued daily and taken into account. Each class of shares is offered at net asset value without the imposition of an initial sales charge (some Class A shares may be subject to a CDSC).

Except as set forth below, the fund's portfolio investments are valued on each business day on the basis of amortized cost, if the Board of Trustees determines in good faith that such method approximates fair value. This technique involves valuing an instrument at its cost and, thereafter, assuming a constant amortization to maturity of any discount or premium, regardless of the impact of fluctuating interest rates on the market value of the instrument. While this method provides certainty in valuation, it may result in periods during which value, as determined by amortized cost, is higher or lower than the price the fund would receive if it sold the investment. During periods of declining interest rates, the yield on shares of the fund computed as described below may tend to be higher than a like computation made by a fund with identical investments utilizing a method of valuation based upon market prices and estimates of market prices for all of its portfolio investments. Thus, if the use of amortized cost by the fund resulted in a lower aggregate portfolio value on a particular day, a prospective investor in the fund would be able to obtain a somewhat higher yield than would result from investment in a fund utilizing solely market values. The converse would apply in a period of rising interest rates.

Standby commitments will be valued at zero in determining net asset value. "When-issued" securities will be valued at the value of the security at the time the commitment to purchase is entered into.

The valuation of the fund's portfolio investments based upon their amortized cost and the concomitant expectation

to maintain the fund's per share net asset value of $1.00 is permitted in accordance with Rule 2a-7 under the 1940 Act pursuant to which the fund must adhere to certain conditions. The fund must comply with the quality, maturity, liquidity and diversification requirements of Rule 2a-7 and maintain a dollar-weighted average portfolio maturity of 60 days or less. The maturities of variable rate demand instruments held in the fund's portfolio will be deemed to be the longer of the demand period or the period remaining until the next interest rate adjustment, although stated maturities may be in excess of one year. For purposes of determining the weighted average life of the fund's portfolio, the period remaining until the variable rate instrument's next interest rate readjustment will not be taken into account. The Trustees have established procedures designed to stabilize, to the extent reasonably possible, the price per share of each class of the fund for the purpose of maintaining sales and redemptions at a single value. It is the intention of the fund to maintain each class' per share net asset value of $1.00 but there can be no assurance of this. Such procedures will include review of the fund's portfolio holdings by the Trustees, at such intervals as they may deem appropriate, to determine whether the fund's net asset value per class calculated by using available market quotations deviates from $1.00 per share and, if so, whether such deviation may result in material dilution or is otherwise unfair to existing shareholders. In the event the Trustees determine that such a deviation exists, they have agreed to take such corrective action as they regard as necessary and appropriate, including: (i) the sale of portfolio instruments prior to maturity to realize capital gains or losses or to shorten average portfolio maturity; (ii) withholding dividends; (iii) redeeming shares in kind; (iv) investing all cash in instruments maturing on the next business day; (v) establishing a net asset value per share by using available market quotations; or (vi) suspending redemptions and payment of redemption proceeds if the Board irrevocably has approved the liquidation of the fund.

16. Tax status

The fund has elected to be treated, and has qualified and intends to continue to qualify each year, as a "regulated investment company" under Subchapter M of the Internal Revenue Code of 1986, as amended (the "Code"), so that it will not pay U.S. federal income tax on income and capital gains distributed to shareholders. In order to qualify as a regulated investment company under Subchapter M of the Code, the fund must, among other things, (i) derive at least 90% of its gross income for each taxable year from dividends, interest, payments with respect to certain securities loans, gains from the sale or other disposition of stock, securities or foreign currencies, or other income (including gains from options, futures and forward contracts) derived with respect to its business of investing in such stock, securities or currencies, and net income derived from an interest in a qualified publicly traded partnership (as defined in Section 851(h) of the Code) (the "90% income test") and (ii) diversify its holdings so that, at the end of each quarter of each taxable year: (a) at least 50% of the value of the fund's total assets is represented by (1) cash and cash items, U.S. government securities, securities of other regulated investment companies, and (2) other securities, with such other securities limited, in respect of any one issuer, to an amount not greater than 5% of the value of the fund's total assets and to not more than 10% of the outstanding voting securities of such issuer and (b) not more than 25% of the value of the fund's total assets is invested in (1) the securities (other than U.S. government securities and securities of other regulated investment companies) of any one issuer, (2) the securities (other than securities of other regulated investment companies) of two or more issuers that the fund controls and that are engaged in the same, similar, or related trades or businesses, or (3) the securities of one or more qualified publicly traded partnerships.

For purposes of the 90% income test, the character of income earned by certain entities in which the fund invests that are not treated as corporations for U.S. federal income tax purposes (e.g., partnerships other than certain publicly traded partnerships or trusts that have not elected to be classified as corporations under the "check-the-box" regulations) will generally pass through to the fund. Consequently, in order to qualify as a regulated investment company, the fund may be required to limit its equity investments in such entities that earn fee income, rental income or other nonqualifying income.

If the fund qualifies as a regulated investment company and properly distributes to its shareholders each taxable year an amount equal to or exceeding the sum of (i) 90% of its "investment company taxable income" as that term is defined in the Code (which includes, among other things, dividends, taxable interest, and the excess of any net short-term capital gains over net long-term capital losses, as reduced by certain deductible expenses) without regard to the deduction for dividends paid and (ii) 90% of the excess of its gross tax-exempt interest income, if any, over certain disallowed deductions, the fund generally will not be subject to U.S. federal income tax on any income of the

fund, including "net capital gain" (the excess of net long-term capital gain over net short-term capital loss), distributed to shareholders. However, if the fund meets such distribution requirements, but chooses to retain some portion of its taxable income or gains, it generally will be subject to U.S. federal income tax at the applicable corporate rate on the amount retained. The fund may designate certain amounts retained as undistributed net capital gain in a notice to its shareholders, who (i) will be required to include in income for U.S. federal income tax purposes, as long-term capital gain, their proportionate shares of the undistributed amount so designated, (ii) will be entitled to credit their proportionate shares of the income tax paid by the fund on that undistributed amount against their federal income tax liabilities and to claim refunds to the extent such credits exceed their liabilities and (iii) will be entitled to increase their tax basis, for federal income tax purposes, in their shares by an amount equal to the excess of the amount of undistributed net capital gain included in their respective income over their respective income tax credits. The fund intends to distribute at least annually all or substantially all of its investment company taxable income (computed without regard to the dividends-paid deduction), net tax-exempt interest income, and net capital gain.

If, for any taxable year, the fund does not qualify as a regulated investment company or does not satisfy the 90% distribution requirement, it will be treated as a U.S. corporation subject to U.S. federal income tax, thereby subjecting any income earned by the fund to tax at the corporate level and to a further tax at the shareholder level when such income is distributed. Under certain circumstances, the fund may be able to cure a failure to qualify as a regulated investment company, but in order to do so, the fund may incur significant fund-level taxes and may be forced to dispose of certain assets.

Under the Code, the fund will be subject to a nondeductible 4% U.S. federal excise tax on a portion of its undistributed ordinary income and capital gain net income if it fails to meet certain distribution requirements with respect to each calendar year and year ending October 31, respectively. The fund intends to make distributions in a timely manner and accordingly does not expect to be subject to the excise tax.

The fund declares a dividend from net investment income (other than capital gains) each business day. Dividends are normally paid on the last business day of the month or shortly thereafter. The fund distributes any net short- and long-term capital gains in November. Dividends from income and/or capital gains may also be paid at such other times as may be necessary for the fund to avoid U.S. federal income or excise tax.

Unless a shareholder specifies otherwise, all distributions from the fund to that shareholder will be automatically reinvested in additional full and fractional shares of the fund. For U.S. federal income tax purposes, all dividends generally are taxable whether a shareholder takes them in cash or reinvests them in additional shares of the fund. In general, assuming that the fund has sufficient earnings and profits, dividends from net investment income and net short-term capital gains are taxable as ordinary income. Since the fund's income is derived from sources that do not pay dividends, it is not expected that any dividends paid by the fund will qualify for either the dividends-received deduction for corporations or any favorable U.S. federal income tax rates available to individual and certain other noncorporate shareholders on qualified dividend income. Distributions by the fund in excess of the fund's current and accumulated earnings and profits will be treated as a return of capital to the extent of (and in reduction of) the shareholder's tax basis in its shares and any such amount in excess of that basis will be treated as gain from the sale of shares, as discussed below.

Distributions from net capital gains, if any, that are reported as capital gain dividends by the fund are taxable as long-term capital gains for U.S. federal income tax purposes without regard to the length of time the shareholder has held shares of the fund. The fund does not anticipate that it will earn or distribute any net capital gains. Any capital gain dividends distributed by the fund to individual and certain other noncorporate shareholders will be taxable as long-term capital gains, which are generally taxable to noncorporate taxpayers at reduced U.S. federal income tax rates.

A shareholder should also be aware that the benefits of the favorable tax rates applicable to long-term capital gains may be affected by the application of the alternative minimum tax applicable to individuals.

The U.S. federal income tax status of all distributions will be reported to shareholders annually.

(subject to certain adjustments) that exceeds a threshold amount ($250,000 if married filing jointly or if considered a "surviving spouse" for federal income tax purposes, $125,000 if married filing separately, and $200,000 in other cases). This 3.8% tax also applies to all or a portion of the undistributed net investment income of certain shareholders that are estates and trusts. For these purposes, interest, dividends and certain capital gains (among other categories of income) are generally taken into account in computing a shareholder's net investment income.

Certain tax-exempt educational institutions will be subject to a 1.4% tax on net investment income. For these purposes, certain dividends and capital gain distributions, and certain gains from the disposition of fund shares (among other categories of income), are generally taken into account in computing a shareholder's net investment income.

Although dividends generally will be treated as distributed when paid, any dividend declared by the fund in October, November or December and payable to shareholders of record in such a month that is paid during the following January will be treated for U.S. federal income tax purposes as received by shareholders on December 31 of the calendar year in which it was declared. In addition, certain distributions made after the close of a taxable year of the fund may be "spilled back" and treated for certain purposes as paid by the fund during such taxable year. In such case, shareholders generally will be treated as having received such dividends in the taxable year in which the distributions were actually made. For purposes of calculating the amount of a regulated investment company's undistributed income and gain subject to the 4% excise tax described above, such "spilled back" dividends are treated as paid by the regulated investment company when they are actually paid.

For U.S. federal income tax purposes, the fund is permitted to carry forward indefinitely a net capital loss from any taxable year to offset its capital gains, if any, in years following the year of the loss. To the extent subsequent capital gains are offset by such losses, they will not result in U.S. federal income tax liability to the fund and may not be distributed as capital gains to shareholders. See "Annual Fee, Expense and Other Information" for the fund's available capital loss carryforwards. Generally, the fund may not carry forward any losses other than net capital losses. Under certain circumstances, the fund may elect to treat certain losses as though they were incurred on the first day of the taxable year immediately following the taxable year in which they were actually incurred.

Under Section 163(j) of the Code, a taxpayer's business interest expense is generally deductible to the extent of its business interest income plus certain other amounts. If the fund earns business interest income, it may report a portion of its dividends as "Section 163(j) interest dividends," which its shareholders may be able to treat as business interest income for purposes of Section 163(j) of the Code. The fund's "Section 163(j) interest dividend" for a tax year will be limited to the excess of its business interest income over the sum of its business interest expense and other deductions properly allocable to its business interest income. In general, the fund's shareholders may treat a distribution reported as a Section 163(j) interest dividend as interest income only to the extent the distribution exceeds the sum of the portions of the distribution reported as other types of tax-favored income. To be eligible to treat a Section 163(j) interest dividend as interest income, a shareholder may need to meet certain holding period requirements in respect of the shares and must not have hedged its position in the shares in certain ways.

Redemptions and exchanges generally are taxable events for shareholders that are subject to tax but generally will not result in taxable gain or loss if the fund successfully maintains a constant net asset value per share. A loss may occur to the extent that a CDSC or a liquidity fee is imposed in connection with a redemption or exchange. Shareholders should consult their own tax advisers with reference to their individual circumstances to determine whether any particular transaction in fund shares is properly treated as a sale for tax purposes, as the following discussion assumes, and to ascertain the tax treatment of any gains or losses recognized in such transactions. In general, if fund shares are sold, the shareholder will recognize gain or loss equal to the difference, if any, between the amount realized on the sale and the shareholder's adjusted basis in the shares. Such gain or loss generally will be treated as long-term capital gain or loss if the shares were held for more than one year and otherwise generally will be treated as short-term capital gain or loss. Any loss recognized by a shareholder upon the redemption, exchange or other disposition of shares with a tax holding period of six months or less will be treated as a long-term capital loss to the extent of any amounts treated as distributions to the shareholder of long-term capital gain with respect to such shares (including any amounts credited to the shareholder as undistributed capital gains).

Losses on redemptions or other dispositions of shares may be disallowed under "wash sale" rules in the event of other investments in the fund (including those made pursuant to reinvestment of dividends and/or capital gain

distributions) within a period of 61 days beginning 30 days before and ending 30 days after a redemption or other disposition of shares. In such a case, the disallowed portion of any loss generally would be included in the U.S. federal tax basis of the shares acquired in the other investments. Gain may be increased (or loss reduced) upon a redemption of Class A shares of the fund within 90 days after their purchase followed by any purchase (including purchases by exchange or by reinvestment), without payment of an additional sales charge, of Class A shares of the fund or of another Pioneer fund (or any other shares of a Pioneer fund generally sold subject to a sales charge) before February 1 of the calendar year following the calendar year in which the original Class A shares were redeemed.

Under Treasury regulations, if a shareholder recognizes a loss with respect to fund shares of $2 million or more for an individual shareholder, or $10 million or more for a corporate shareholder, in any single taxable year (or certain greater amounts over a combination of years), the shareholder must file with the Internal Revenue Service (the "IRS") a disclosure statement on IRS Form 8886. Shareholders who own portfolio securities directly are in many cases excepted from this reporting requirement but, under current guidance, shareholders of regulated investment companies are not excepted. A shareholder who fails to make the required disclosure to the IRS may be subject to substantial penalties. The fact that a loss is reportable under these regulations does not affect the legal determination of whether or not the taxpayer's treatment of the loss is proper. Shareholders should consult with their tax advisers to determine the applicability of these regulations in light of their individual circumstances.

Shareholders that are exempt from U.S. federal income tax, such as retirement plans that are qualified under Section 401 of the Code, generally are not subject to U.S. federal income tax on fund dividends or distributions, or on sales or exchanges of fund shares unless the fund shares are "debt-financed property" within the meaning of the Code. However, in the case of fund shares held through a non-qualified deferred compensation plan, fund dividends and distributions received by the plan and gains from sales and exchanges of fund shares by the plan generally are taxable to the employer sponsoring such plan in accordance with the U.S. federal income tax laws that are generally applicable to shareholders receiving such dividends or distributions from regulated investment companies such as the fund.

A plan participant whose retirement plan invests in the fund, whether such plan is qualified or not, generally is not taxed on fund dividends or distributions received by the plan or on gains from sales or exchanges of fund shares by the plan for U.S. federal income tax purposes. However, distributions to plan participants from a retirement plan account generally are taxable as ordinary income, and different tax treatment, including penalties on certain excess contributions and deferrals, certain pre-retirement and post-retirement distributions and certain prohibited transactions, is accorded to accounts maintained as qualified retirement plans. Shareholders should consult their tax advisers for more information.

Foreign exchange gains and losses realized by the fund in connection with certain transactions involving foreign currency-denominated debt securities, certain options and futures contracts relating to foreign currency, foreign currency forward contracts, foreign currencies, or payables or receivables denominated in a foreign currency are subject to Section 988 of the Code, which generally causes such gains and losses to be treated as ordinary income and losses and may affect the amount, timing and character of distributions to shareholders. Under Treasury regulations that may be promulgated in the future, any gains from such transactions that are not directly related to the fund's principal business of investing in stock or securities (or its options contracts or futures contracts with respect to stock or securities) may have to be limited in order to enable the fund to satisfy the 90% income test.

If the fund invests in certain pay-in-kind securities, zero coupon securities, deferred interest securities or, in general, any other securities with original issue discount (or with market discount if the fund elects to include market discount in income currently), the fund generally must accrue income on such investments for each taxable year, which generally will be prior to the receipt of the corresponding cash payments. However, the fund must distribute to its shareholders, at least annually, all or substantially all of its investment company taxable income (determined without regard to the deduction for dividends paid), including such accrued income, to qualify to be treated as a regulated investment company under the Code and avoid U.S. federal income and excise taxes. Therefore, the fund may have to dispose of its portfolio securities, potentially under disadvantageous circumstances, to generate cash, or may have to borrow the cash, to satisfy distribution requirements. Such a disposition of securities may potentially result in additional taxable gain or loss to the fund.

The fund may invest in or hold debt obligations of issuers not currently paying interest or that are in default. Investments in debt obligations that are at risk of or are in default present special tax issues for the fund. Federal income tax rules are not entirely clear about issues such as when the fund may cease to accrue interest, original issue discount or market discount, when and to what extent deductions may be taken for bad debts or worthless securities, how payments received on obligations in default should be allocated between principal and interest and whether certain exchanges of debt obligations in a workout context are taxable. These and other issues will be addressed by the fund, in the event it invests in or holds such securities, in order to seek to ensure that it distributes sufficient income to preserve its status as a regulated investment company and does not become subject to U.S. federal income or excise tax.

Options written or purchased and futures contracts entered into by the fund on certain securities, indices and foreign currencies, as well as certain forward foreign currency contracts, may cause the fund to recognize gains or losses from marking-to-market even though such options may not have lapsed or been closed out or exercised, or such futures or forward contracts may not have been performed or closed out. The tax rules applicable to these contracts may affect the characterization of some capital gains and losses realized by the fund as long-term or short-term. Certain options, futures and forward contracts relating to foreign currency may be subject to Section 988 of the Code, as described above, and accordingly may produce ordinary income or loss. Additionally, the fund may be required to recognize gain if an option, futures contract, forward contract, short sale or other transaction that is not subject to the mark-to-market rules is treated as a "constructive sale" of an "appreciated financial position" held by the fund under Section 1259 of the Code. Any net mark-to-market gains and/or gains from constructive sales may also have to be distributed to satisfy the distribution requirements referred to above even though the fund may receive no corresponding cash amounts, possibly requiring the disposition of portfolio securities or borrowing to obtain the necessary cash. Such a disposition of securities may potentially result in additional taxable gain or loss to the fund. Losses on certain options, futures or forward contracts and/or offsetting positions (portfolio securities or other positions with respect to which the fund's risk of loss is substantially diminished by one or more options, futures or forward contracts) may also be deferred under the tax straddle rules of the Code, which may also affect the characterization of capital gains or losses from straddle positions and certain successor positions as long-term or short-term. Certain tax elections may be available that would enable the fund to ameliorate some adverse effects of the tax rules described in this paragraph. The tax rules applicable to options, futures, forward contracts and straddles may affect the amount, timing and character of the fund's income and gains or losses and hence of its distributions to shareholders.

The fund may be subject to withholding and other taxes imposed by foreign countries, including taxes on interest, dividends and capital gains with respect to its investments in those countries. Any such taxes would, if imposed, reduce the yield on or return from those investments. Tax conventions between certain countries and the U.S. may reduce or eliminate such taxes in some cases. The fund does not expect to satisfy the requirements for passing through to its shareholders any share of foreign taxes paid by the fund, with the result that shareholders will not include such taxes in their gross incomes and will not be entitled to a tax deduction or credit for such taxes on their own tax returns.

The fund is required to withhold (as "backup withholding") a portion of reportable payments, including dividends and any capital gain distributions, paid to shareholders who have not complied with certain IRS regulations. The backup withholding rate is currently 24%. In order to avoid this withholding requirement, shareholders, other than certain exempt entities, must generally certify that the Social Security Number or other Taxpayer Identification Number they provide is their correct number and that they are not currently subject to backup withholding, or that they are exempt from backup withholding. The fund may nevertheless be required to backup withhold if it receives notice from the IRS or a broker that the number provided is incorrect or backup withholding is applicable as a result of previous underreporting of interest or dividend income.

The description of certain federal tax provisions above relates only to U.S. federal income tax consequences for shareholders who are U.S. persons, i.e., generally, U.S. citizens or residents or U.S. corporations, partnerships, trusts or estates, and who are subject to U.S. federal income tax and hold their shares as capital assets. Except as otherwise provided, this description does not address the special tax rules that may be applicable to particular types of investors, such as financial institutions, insurance companies, securities dealers, other regulated investment companies, or tax-exempt or tax-deferred plans, accounts or entities. Investors other than U.S. persons may be

subject to different U.S. federal income tax treatment, including a non-resident alien U.S. withholding tax at the rate of 30% or any lower applicable treaty rate on amounts treated as ordinary dividends from the fund (other than certain dividends reported by the fund as (i) interest-related dividends, to the extent such dividends are derived from the fund's "qualified net interest income," or (ii) short-term capital gain dividends, to the extent such dividends are derived from the fund's "qualified short-term gain") or, in certain circumstances, unless an effective IRS Form W-8BEN or other authorized withholding certificate is on file, to backup withholding on certain other payments from the fund. "Qualified net interest income" is the fund's net income derived from U.S.-source interest and original issue discount, subject to certain exceptions and limitations. "Qualified short-term gain" generally means the excess of the net short-term capital gain of the fund for the taxable year over its net long-term capital loss, if any. Backup withholding will not be applied to payments that have been subject to the 30% (or lower applicable treaty rate) withholding tax on shareholders who are neither citizens nor residents of the United States.

Unless certain non-U.S. entities that hold fund shares comply with IRS requirements that will generally require them to report information regarding U.S. persons investing in, or holding accounts with, such entities, a 30% withholding tax may apply to fund distributions payable to such entities. A non-U.S. shareholder may be exempt from the withholding described in this paragraph under an applicable intergovernmental agreement between the U.S. and a foreign government, provided that the shareholder and the applicable foreign government comply with the terms of such agreement.

Shareholders should consult their own tax advisers on these matters and on state, local, foreign and other applicable tax laws.

If, as anticipated, the fund qualifies as a regulated investment company under the Code, it will not be required to pay any Massachusetts income, corporate excise or franchise taxes or any Delaware corporation income tax.

A state income (and possibly local income and/or intangible property) tax exemption is generally available to the extent the fund's distributions are derived from interest on (or, in the case of intangible property taxes, to the extent the value of its assets is attributable to) certain U.S. government obligations, provided in some states that certain thresholds for holdings of such obligations and/or reporting requirements are satisfied. The fund will not seek to satisfy any threshold or reporting requirements that may apply in particular taxing jurisdictions, although the fund may in its sole discretion provide relevant information to shareholders.

17. Financial statements

The fund's financial statementsand financial highlights for the fiscal year ended December 31, 2023 appearing in the fund's annual report, filed with the SEC on March 5, 2024 (Accession No. 0001193125-24-058911), are incorporated by reference into this statement of additional information. Those financial statements and financial highlights have been audited by Ernst & Young LLP, independent registered public accounting firm, as indicated in their report thereon, and are incorporated herein by reference in reliance upon such report, given on the authority of Ernst & Young LLP as experts in accounting and auditing.

The fund's annual report includes the financial statements referenced above and is available without charge upon request by calling the fund at 1-800-225-6292.

18. Annual fee, expense and other information

Share ownership

As of March 31, 2024, the Trustees and officers of the fund owned beneficially in the aggregate less than 1% of the outstanding shares of the fund. The following is a list of the holders of 5% or more of any class of the fund's outstanding shares as of March 31, 2024:

Record Holder	Share Class	Number of Shares	% of Class
Charles Schwab Trust Bank Cust Plan Member Qualified Accounts 2423 E. Lincoln Dr. Phoenix, AZ 85016-1215	Class R	173,114.120	6.82

Record Holder	Share Class	Number of Shares	% of Class
Ascensus Trust Company FBO DePietro Roofing Inc. 401(K) P.O. Box 10758 Fargo, ND 58106-0758	Class R	409,516.120	16.12
Ascensus Trust Company FBO Baumann Waterworks P.O. Box 10758 Fargo, ND 58106-0758	Class R	227,285.000	8.95
Ascensus Trust Company FBO Olinda Partners 401K P.O. Box 10758 Fargo, ND 58106-0758	Class R	175,930.830	6.93
Ascensus Trust Company FBO Dean Gilbert Realtor 401K P.O. Box 10758 Fargo, ND 58106-0758	Class R	133,562.320	5.26
Ascensus Trust Company FBO Grant Pudalov PC Uni-K P.O. Box 10758 Fargo, ND 58106-0758	Class R	142,987.760	5.63
Amundi Distributor US, Inc. Attn: Corporate Accounting 60 State St. Boston, MA 02109-1800	Class Y	27,950,000.000	39.39
MLPF&S For the Sole Benefit of its Customers Mutual Fund Administration 4800 Deer Lake Drive East, 2nd Floor Jacksonville, FL 32246-6484	Class Y	39,361,436.146	55.48

Shareholders who beneficially own 25% or more of the outstanding shares of the fund or who are otherwise deemed to "control" the fund may be able to determine or significantly influence the outcome of matters submitted to a vote of the fund's shareholders.

Trustee ownership of shares of the fund and other Pioneer funds

The following table indicates the value of shares that each Trustee beneficially owned in the fund and Pioneer Funds in the aggregate as of December 31, 2023. Beneficial ownership is determined in accordance with SEC rules. The share value of any closed-end fund is based on its closing market price on December 31, 2023. The share value of any open-end Pioneer Fund is based on the net asset value of the class of shares on December 31, 2023. The dollar ranges in this table are in accordance with SEC requirements.

Name of Trustee	Dollar Range of Equity Securities in the Fund	Aggregate Dollar Range of Equity Securities in All Registered Investment Companies Overseen by Trustee in the Pioneer Family of Funds
Interested Trustee:
Lisa M. Jones	Over $100,000	Over $100,000
Independent Trustees:
John E. Baumgardner, Jr.	None	Over $100,000
Diane Durnin	None	Over $100,000
Benjamin M. Friedman	None	Over $100,000
Craig C. MacKay	None	Over $100,000
Lorraine H. Monchak	None	Over $100,000
Thomas J. Perna	None	Over $100,000
Marguerite A. Piret*	None	Over $100,000
Fred J. Ricciardi	None	Over $100,000

Ms. Piret became a non-voting Advisory Trustee of the Pioneer Funds effective January 22, 2024.

Compensation of officers and trustees

The following table sets forth certain information with respect to the compensation of each Trustee of the fund.

Name of Trustee	Aggregate Compensation from Fund**	Pension or Retirement Benefits Accrued as Part of Fund Expenses	Total Compensation from the Fund and Other Pioneer Funds**
Interested Trustees:
Lisa M. Jones*	$0.00	$0.00	$0.00
Kenneth J. Taubes***	$0.00	$0.00	$0.00
Independent Trustees:
John E. Baumgardner, Jr.	$1,547.58	$0.00	$312,100.00
Diane Durnin	$1,522.04	$0.00	$299,762.00
Benjamin M. Friedman	$1,591.55	$0.00	$334,275.00
Craig C. MacKay	$1,514.94	$0.00	$297,262.00
Lorraine H Monchak	$1,602.24	$0.00	$339,438.00
Thomas J. Perna	$1,731.80	$0.00	$402,100.00
Marguerite A. Piret****	$1,540.12	$0.00	$308,438.00
Fred J. Ricciardi	$1,593.35	$0.00	$333,938.00
TOTAL	$12,643.62	$0.00	$2,627,313.00

Under the management contract, Amundi US reimburses the fund for any Interested Trustee fees paid by the fund.

For the fiscal year ended December 31, 2023. As of December 31, 2023, there were 47 U.S. registered investment portfolios in the Pioneer Family of Funds.

***

Mr. Taubes retired as a Trustee of the Pioneer Funds effective January 1, 2024.

****

Ms. Piret became a non-voting Advisory Trustee of the Pioneer Funds effective January 22, 2024.

Approximate management fees the fund paid or owed Amundi US

The following table shows the dollar amount of gross investment management fees incurred by the fund, along with the net amount of fees that were paid after applicable fee waivers or expense reimbursements, if any. The data is for the past three fiscal years.

For the Fiscal Years Ended December 31	2023	2022	2021
Gross Fee Incurred	$1,133,699	$1,042,636	$1,006,010
Net Fee Paid	$1,133,699	$840,207	$0

Fees the fund paid to Amundi US under the administration agreement

For the Fiscal Years Ended December 31
2023	2022	2021
$145,128	$124,230	$193,827

Underwriting expenses and commissions

For the Fiscal Years Ended December 31	2023	2022	2021
Approximate Net Underwriting Expenses Retained by Amundi Distributor US, Inc.	$0	$0	$0
Approximate Commissions Reallowed to Dealers (Class A shares)	$0	$0	$0
Approximate Brokerage and Underwriting Commissions (Portfolio Transactions)	$0	$0	$0

Fund expenses under the distribution plan

For the Fiscal Year Ended December 31, 2023
Combined Plan	Class A Plan	Class R Plan
$394,063	$383,509	$10,554

Allocation of fund expenses under the distribution plan

An estimate by category of the allocation of fees under the distribution plan during the fiscal year ended December 31, 2023 is set forth in the following table:

	Payments to Servicing Parties1	Advertising	Sales Meetings	Printing and Mailing	Total
Class A	$0	$61,028	$261,575	$60,906	$383,509
Class R	$10,554	$0	$0	$0	$10,554

Payments to Servicing Parties include Amundi Distributor US, Inc., broker-dealers, financial intermediaries and other parties that enter into a distribution, selling or service agreement with respect to one or more classes of the fund (annualized for the period ended December 31, 2023).

Securities of regular broker-dealers

As of December 31, 2023, the fund held the following securities of its regular broker-dealers (or affiliates of such broker-dealers):

Name	Debt \ Equity	(000's)
None

CDSCs

During the fiscal year ended December 31, 2023, the following CDSCs were paid to Amundi Distributor US, Inc.:
$0

Capital loss carryforwards as of December 31, 2023

At December 31, 2023, the fund had the following net capital loss carryforward:

$2,258 of short-term losses and $218 of long-term losses to be carried forward indefinitely.

19. Appendix A - Description of Ratings

The ratings of Moody's Investors Service, Inc., S&P's Global Ratings and Fitch Ratings represent their opinions as to the quality of various debt obligations. It should be emphasized, however, that ratings are not absolute standards of quality. Consequently, debt obligations with the same maturity, coupon and rating may have different yields while debt obligations of the same maturity and coupon with different ratings may have the same yield. As described by the rating agencies, ratings are generally given to securities at the time of issuances. While the rating agencies may from time to time revise such ratings, they undertake no obligation to do so.

Moody's Investors Service, Inc. Global Rating Scales

Ratings assigned on Moody's global long-term and short-term rating scales are forward-looking opinions of the relative credit risks of financial obligations issued by non-financial corporates, financial institutions, structured finance vehicles, project finance vehicles, and public sector entities. Moody's defines credit risk as the risk that an entity may not meet its contractual financial obligations as they come due and any estimated financial loss in the event of default or impairment. The contractual financial obligations1addressed by Moody's ratings are those that call for, without regard to enforceability, the payment of an ascertainable amount, which may vary based upon standard sources of variation (e.g., floating interest rates), by an ascertainable date. Moody's rating addresses the issuer's ability to obtain cash sufficient to service the obligation, and its willingness to pay.2Moody's ratings do not address non-standard sources of variation in the amount of the principal obligation (e.g., equity indexed), absent an express statement to the contrary in a press release accompanying an initial rating.3Long-term ratings are assigned to issuers or obligations with an original maturity of one year or more and reflect both on the likelihood of a default or impairment on contractual financial obligations and the expected financial loss suffered in the event of default or impairment. Short-term ratings are assigned for obligations with an original maturity of thirteen months or less and reflect both on the likelihood of a default or impairment on contractual financial obligations and the expected financial loss suffered in the event of default or impairment.4,5

Moody's issues ratings at the issuer level and instrument level on both the long-term scale and the short-term scale. Typically, ratings are made publicly available although private and unpublished ratings may also be assigned.6

Moody's differentiates structured finance ratings from fundamental ratings (i.e., ratings on nonfinancial corporate, financial institution, and public sector entities) on the global long-term scale by adding (sf) to all structured finance ratings7. The addition of (sf) to structured finance ratings should eliminate any presumption that such ratings and fundamental ratings at the same letter grade level will behave the same. The (sf) indicator for structured finance security ratings indicates that otherwise similarly rated structured finance and fundamental securities may have different risk characteristics. Through its current methodologies, however, Moody's aspires to achieve broad expected equivalence in structured finance and fundamental rating performance when measured over a long period of time.

Description of Moody's Investors Service, Inc.'s Global Long-Term Ratings:

Aaa-Obligations rated Aaa are judged to be of the highest quality, subject to the lowest level of credit risk.

Aa-Obligations rated Aa are judged to be of high quality and are subject to very low credit risk.

A-Obligations rated A are judged to be upper-medium grade and are subject to low credit risk.

Baa-Obligations rated Baa are judged to be medium-grade and subject to moderate credit risk and as such may possess certain speculative characteristics.

Ba-Obligations rated Ba are judged to be speculative and are subject to substantial credit risk.

B-Obligations rated B are considered speculative and are subject to high credit risk.

Caa-Obligations rated Caa are judged to be speculative of poor standing and are subject to very high credit risk.

Ca-Obligations rated Ca are highly speculative and are likely in, or very near, default, with some prospect of recovery of principal and interest.

C-Obligations rated C are the lowest rated and are typically in default, with little prospect for recovery of principal

In the case of impairments, there can be a financial loss even when contractual obligations are met.

In some cases the relevant credit risk relates to a third party, in addition to, or instead of the issuer. Examples include credit-linked notes and guaranteed obligations.

Because the number of possible features or structures is limited only by the creativity of issuers, Moody's cannot comprehensively catalogue all the types of non-standard variation affecting financial obligations, but examples include indexed values, equity values and cash flows, prepayment penalties, and an obligation to pay an amount that is not ascertainable at the inception of the transaction.

For certain structured finance, preferred stock and hybrid securities in which payment default events are either not defined or do not match investors' expectations for timely payment, long-term and short-term ratings reflect the likelihood of impairment and financial loss in the event of impairment.

Debts held on the balance sheets of official sector institutions - which include supranational institutions, central banks and certain government-owned or controlled banks - may not always be treated the same as debts held by private investors and lenders. When it is known that an obligation is held by official sector institutions as well as other investors, a rating (short-term or long-term) assigned to that obligation reflects only the credit risks faced by non-official sector investors.

For information on how to obtain a Moody's credit rating, including private and unpublished credit ratings, please see Moody's Investors Service Products.

Like other global scale ratings, (sf) ratings reflect both the likelihood of a default and the expected loss suffered in the event of default. Ratings are assigned based on a rating committee's assessment of a security's expected loss rate (default probability multiplied by expected loss severity), and may be subject to the constraint that the final expected loss rating assigned would not be more than a certain number of notches, typically three to five notches, above the rating that would be assigned based on an assessment of default probability alone. The magnitude of this constraint may vary with the level of the rating, the seasoning of the transaction, and the uncertainty around the assessments of expected loss and probability of default.

or interest.

Note: Moody's appends numerical modifiers 1, 2, and 3 to each generic rating classification from Aa through Caa. The modifier 1 indicates that the obligation ranks in the higher end of its generic rating category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates a ranking in the lower end of that generic rating category. Additionally, a "(hyb)" indicator is appended to all ratings of hybrid securities issued by banks, insurers, finance companies, and securities firms.

By their terms, hybrid securities allow for the omission of scheduled dividends, interest, or principal payments, which can potentially result in impairment if such an omission occurs. Hybrid securities may also be subject to contractually allowable write-downs of principal that could result in impairment. Together with the hybrid indicator, the long-term obligation rating assigned to a hybrid security is an expression of the relative credit risk associated with that security.

Description of Moody's Investors Service, Inc.'s Global Short-Term Ratings:

P-1-Ratings of Prime-1 reflect a superior ability to repay short-term debt obligations.

P-2-Ratings of Prime-2 reflect a strong ability to repay short-term debt obligations.

P-3-Ratings of Prime-3 reflect an acceptable ability to repay short-term obligations.

NP-Issuers (or supporting institutions) rated Not Prime do not fall within any of the Prime rating categories.

Description of Moody's Investors Service, Inc.'s US Municipal Ratings:

U.S. Municipal Short-Term Obligation Ratings:

Moody's uses the global short-term Prime rating scale for commercial paper issued by US municipalities and nonprofits. These commercial paper programs may be backed by external letters of credit or liquidity facilities, or by an issuer's self-liquidity. For other short-term municipal obligations, Moody's uses one of two other short-term rating scales, the Municipal Investment Grade (MIG) and Variable Municipal Investment Grade (VMIG) scales discussed below.

Moody's uses the MIG scale for US municipal cash flow notes, bond anticipation notes and certain other short-term obligations, which typically mature in three years or less. Under certain circumstances, Moody's uses the MIG scale for bond anticipation notes with maturities of up to five years.

MIG 1-This designation denotes superior credit quality. Excellent protection is afforded by established cash flows, highly reliable liquidity support, or demonstrated broad-based access to the market for refinancing.

MIG 2-This designation denotes strong credit quality. Margins of protection are ample, although not as large as in the preceding group.

MIG 3-This designation denotes acceptable credit quality. Liquidity and cash-flow protection may be narrow, and market access for refinancing is likely to be less well-established.

SG-This designation denotes speculative-grade credit quality. Debt instruments in this category may lack sufficient margins of protection.

Demand Obligation Ratings:

In the case of variable rate demand obligations (VRDOs), a two-component rating is assigned. The components are a long-term debt rating and a short-term demand obligation rating. The long-term rating addresses the issuer's ability to meet scheduled principal and interest payments. The short-term demand obligation rating addresses the ability of the issuer or the liquidity provider to make payments associated with the purchase-price-upon-demand feature ("demand feature") of the VRDO. The short-term demand obligation rating uses the VMIG scale. VMIG ratings with l liquidity support use an input the short-term Counterparty Risk Assessment of the support provider, or the long-term rating of the underlying obligor in the absence of third party liquidity support. Transitions of VMIG ratings of demand obligations with conditional liquidity support differ from transitions on the Prime scale to reflect the risk that external liquidity support will terminate if the issuer's long-term rating drops below investment grade.

Moody's typically assigns the VMIG short-term demand obligation rating if the frequency of the demand feature is

less than every three years. If the frequency of the demand feature is less than three years but the purchase price is payable only with remarketing proceeds, the short-term demand obligation rating is "NR".

VMIG 1-This designation denotes superior credit quality. Excellent protection is afforded by the superior short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

VMIG 2-This designation denotes strong credit quality. Good protection is afforded by the strong short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

VMIG 3-This designation denotes acceptable credit quality. Adequate protection is afforded by the satisfactory short-term credit strength of the liquidity provider and structural and legal protections that ensure the timely payment of purchase price upon demand.

SG-This designation denotes speculative-grade credit quality. Demand features rated in this category may be supported by a liquidity provider that does not have an investment grade short-term rating or may lack the structural and/or legal protections necessary to ensure the timely payment of purchase price upon demand.

Description of Moody's Investors Service, Inc.'s National Scale Long-Term Ratings:

Moody's long-term National Scale Ratings (NSRs) are opinions of the relative creditworthiness of issuers and financial obligations within a particular country. NSRs are not designed to be compared among countries; rather, they address relative credit risk within a given country. Moody's assigns national scale ratings in certain local capital markets in which investors have found the global rating scale provides inadequate differentiation among credits or is inconsistent with a rating scale already in common use in the country.

In each specific country, the last two characters of the rating indicate the country in which the issuer is located or the financial obligation was issued (e.g., Aaa.ke for Kenya).

Long-Term NSR Scale

Aaa.nIssuers or issues rated Aaa.n demonstrate the strongest creditworthiness relative to other domestic issuers and issuances.

Aa.nIssuers or issues rated Aa.n demonstrate very strong creditworthiness relative to other domestic issuers and issuances.

A.nIssuers or issues rated A.n present above-average creditworthiness relative to other domestic issuers and issuances.

Baa.nIssuers or issues rated Baa.n represent average creditworthiness relative to other domestic issuers and issuances.

Ba.nIssuers or issues rated Ba.n demonstrate below-average creditworthiness relative to other domestic issuers and issuances.

B.nIssuers or issues rated B.n demonstrate weak creditworthiness relative to other domestic issuers and issuances.

Caa.nIssuers or issues rated Caa.n demonstrate very weak creditworthiness relative to other domestic issuers and issuances.

Ca.nIssuers or issues rated Ca.n demonstrate extremely weak creditworthiness relative to other domestic issuers and issuances.

C.nIssuers or issues rated C.n demonstrate the weakest creditworthiness relative to other domestic issuers and issuances.

Description of S&P Global Ratings' Long-Term Issue Credit Ratings:

Long-Term Issue Credit Ratings are based, in varying degrees, on S&P Global Ratings' analysis of the following considerations: (1) the likelihood of payment-the capacity and willingness of the obligor to meet its financial commitment on a financial obligation in accordance with the terms of the obligation; (2) the nature and provisions of the financial obligation, and the promise S&P Global Ratings imputes; and (3) the protection afforded by, and relative position of, the financial obligation in the event of a bankruptcy, reorganization, or other arrangement under the laws of bankruptcy and other laws affecting creditors' rights.

An issue rating is an assessment of default risk, but may incorporate an assessment of relative seniority or ultimate recovery in the event of default. Junior obligations are typically rated lower than senior obligations, to reflect lower priority in bankruptcy, as noted above. (Such differentiation may apply when an entity has both senior and subordinated obligations, secured and unsecured obligations, or operating company and holding company obligations.)

AAA-An obligation rated "AAA" has the highest rating assigned by S&P Global Ratings. The obligor's capacity to meet its financial commitments on the obligation is extremely strong.

AA-An obligation rated "AA" differs from the highest-rated obligations only to a small degree. The obligor's capacity to meet its financial commitments on the obligation is very strong.

A-An obligation rated "A" is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher-rated categories. However, the obligor's capacity to meet its financial commitments on the obligation is still strong.

BBB-An obligation rated "BBB" exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to lead to a weakened capacity of the obligor to meet its financial commitments on the obligation.

BB, B, CCC, CC, and C-Obligations rated "BB", "B", "CCC", "CC", and "C" are regarded as having significant speculative characteristics. "BB" indicates the least degree of speculation and "C" the highest. While such obligations will likely have some quality and protective characteristics, these may be outweighed by large uncertainties or major exposure to adverse conditions.

BB-An obligation rated "BB" is less vulnerable to nonpayment than other speculative issues. However, it faces major ongoing uncertainties or exposure to adverse business, financial, or economic conditions that could lead to the obligor's inadequate capacity to meet its financial commitments on the obligation.

B-An obligation rated "B" is more vulnerable to nonpayment than obligations rated "BB", but the obligor currently has the capacity to meet its financial commitments on the obligation. Adverse business, financial, or economic conditions will likely impair the obligor's capacity or willingness to meet its financial commitments on the obligation.

CCC-An obligation rated "CCC" is currently vulnerable to nonpayment, and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitments on the obligation. In the event of adverse business, financial, or economic conditions, the obligor is not likely to have the capacity to meet its financial commitments on the obligation.

CC-An obligation rated "CC" is currently highly vulnerable to nonpayment. The "CC" rating is used when a default has not yet occurred, but S&P Global Ratings expects default to be a virtual certainty, regardless of the anticipated time to default.

C-An obligation rated "C" is currently highly vulnerable to nonpayment, and the obligation is expected to have lower relative seniority or lower ultimate recovery compared with obligations that are rated higher.

D-An obligation rated "D" is in default or in breach of an imputed promise. For non-hybrid capital instruments, the "D" rating category is used when payments on an obligation are not made on the date due, unless S&P Global Ratings believes that such payments will be made within five business days in the absence of a stated grace period or within the earlier of the stated grace period or 30 calendar days. The "D" rating also will be used upon the filing of a bankruptcy petition or the taking of similar action and where default on an obligation is a virtual certainty, for

example due to automatic stay provisions. A rating on an obligation is is lowered to "D" if it is subject to a distressed exchange offer.

Ratings from "AA" to "CCC" may be modified by the addition of a plus (+) or minus (-) sign to show relative standing within the rating categories.

Description of S&P Global Ratings' Short-Term Issue Credit Ratings:

A-1-A short-term obligation rated "A-1" is rated in the highest category by S&P Global Ratings. The obligor's capacity to meet its financial commitments on the obligation is strong. Within this category, certain obligations are designated with a plus sign (+). This indicates that the obligor's capacity to meet its financial commitments on these obligations is extremely strong.

A-2-A short-term obligation rated "A-2" is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligations in higher rating categories. However, the obligor's capacity to meet its financial commitments on the obligation is satisfactory.

A-3-A short-term obligation rated "A-3" exhibits adequate protection parameters. However, adverse economic conditions or changing circumstances are more likely to weaken an obligor's capacity to meet its financial commitments on the obligation.

B-A short-term obligation rated "B" is regarded as vulnerable and has significant speculative characteristics. The obligor currently has the capacity to meet its financial commitments; however, it faces major ongoing uncertainties that could lead to the obligor's inadequate capacity to meet its financial commitments.

C-A short-term obligation rated "C" is currently vulnerable to nonpayment and is dependent upon favorable business, financial, and economic conditions for the obligor to meet its financial commitments on the obligation.

D-A short-term obligation rated "D" is in default or in breach of an imputed promise. For non-hybrid capital instruments, the "D" rating category is used when payments on an obligation are not made on the date due, unless S&P Global Ratings' believes that such payments will be made within any stated grace period. However, any stated grace period longer than five business days will be treated as five business days. The "D" rating also will be used upon the filing of a bankruptcy petition or the taking of a similar action and where default on an obligation is a virtual certainty, for example due to automatic stay provisions. A rating on an obligation is lowered to "D" if it is subject to a distressed debt restructuring.

Description of S&P Global Ratings' Municipal Short-Term Note Ratings Definitions:

An S&P Global Ratings U.S. municipal note rating reflects S&P Global Ratings opinion about the liquidity factors and market access risks unique to the notes. Notes due in three years or less will likely receive a note rating. Notes with an original maturity of more than three years will most likely receive a long-term debt rating. In determining which type of rating, if any, to assign, S&P Global Ratings' analysis will review the following considerations: (1) amortization schedule-the larger the final maturity relative to other maturities, the more likely it will be treated as a note; and (2) source of payment-the more dependent the issue is on the market for its refinancing, the more likely it will be treated as a note.

SP-1-Strong capacity to pay principal and interest. An issue determined to possess a very strong capacity to pay debt service is given a plus (+) designation.

SP-2-Satisfactory capacity to pay principal and interest, with some vulnerability to adverse financial and economic changes over the term of the notes.

SP-3-Speculative capacity to pay principal and interest.

D-"D" is assigned upon failure to pay the note when due, completion of a distressed debt restructuring, or the filing of a bankruptcy petition or the taking of similar action and where default on an obligation is a virtual certainty, for example due to automatic stay provisions.

Long-Term Issuer Credit Ratings

AAAAn obligor rated "AAA" has extremely strong capacity to meet its financial commitments. "AAA" is the highest

issuer credit rating assigned by S&P Global Ratings.

AAAn obligor rated "AA" has very strong capacity to meet its financial commitments. It differs from the highest-rated obligors only to a small degree.

AAn obligor rated "A" has strong capacity to meet its financial commitments but is somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than obligors in higher-rated categories.

BBBAn obligor rated "BBB" has adequate capacity to meet its financial commitments. However, adverse economic conditions or changing circumstances are more likely to weaken the obligor's capacity to meet its financial commitments.

BB, B, CCC, and CCObligors rated "BB", "B", "CCC", and "CC" are regarded as having significant speculative characteristics. "BB" indicates the least degree of speculation and "CC" the highest. While such obligors will likely have some quality and protective characteristics, these may be outweighed by large uncertainties or major exposure to adverse conditions.

BBAn obligor rated "BB" is less vulnerable in the near term than other lower-rated obligors. However, it faces major ongoing uncertainties and exposure to adverse business, financial, or economic conditions that could lead to the obligor's inadequate capacity to meet its financial commitments.

B An obligor rated "B" is more vulnerable than the obligors rated "BB", but the obligor currently has the capacity to meet its financial commitments. Adverse business, financial, or economic conditions will likely impair the obligor's capacity or willingness to meet its financial commitments.

CCC An obligor rated "CCC" is currently vulnerable and is dependent upon favorable business, financial, and economic conditions to meet its financial commitments.

CC An obligor rated "CC" is currently highly vulnerable. The "CC" rating is used when a default has not yet occurred but S&P Global Ratings expects default to be a virtual certainty, regardless of the anticipated time to default.

SD and DAn obligor is rated "SD" (selective default) or "D" if S&P Global Ratings considers there to be a default on one or more of its financial obligations, whether long- or short-term, including rated and unrated obligations but excluding hybrid instruments classified as regulatory capital or in nonpayment according to terms. A "D" rating is assigned when S&P Global Ratings believes that the default will be a general default and that the obligor will fail to pay all or substantially all of its obligations as they come due. An "SD" rating is assigned when S&P Global Ratings believes that the obligor has selectively defaulted on a specific issue or class of obligations but it will continue to meet its payment obligations on other issues or classes of obligations in a timely manner. A rating on an obligor is lowered to "D" or "SD" if it is conducting a distressed debt restructuring. Ratings from "AA" to "CCC" may be modified by the addition of a plus (+) or minus (-) sign to show relative standing within the rating categories.

Description of S&P Global Ratings' Dual Ratings:

Dual ratings may be assigned to debt issues that have a put option or demand feature. The first component of the rating addresses the likelihood of repayment of principal and interest as due, and the second component of the rating addresses only the demand feature. The first component of the rating can relate to either a short-term or long-term transaction and accordingly use either short-term or long-term rating symbols. The second component of the rating relates to the put option and is assigned a short-term rating symbol (for example, "AAA/A-1+" or "A-1+/A-1"). With U.S. municipal short-term demand debt, the U.S. municipal short-term note rating symbols are used for the first component of the rating (for example, "SP-1+/A-1+").

Description of S&P Global Ratings' Active Qualifiers

S&P Global Ratings uses the following qualifiers that limit the scope of a rating. The structure of the transaction can require the use of a qualifier such as a "p" qualifier, which indicates the rating addresses the principal portion of the obligation only. A qualifier appears as a suffix and is part of the rating.

Federal deposit insurance limit: "L" qualifier. Ratings qualified with "L" apply only to amounts invested up to federal deposit insurance limits.

Principal: "p" qualifier. This suffix is used for issues in which the credit factors, the terms, or both, that determine the likelihood of receipt of payment of principal are different from the credit factors, terms or both that determine the likelihood of receipt of interest on the obligation. The "p" suffix indicates that the rating addresses the principal portion of the obligation only and that the interest is not rated.

Preliminary ratings: "prelim" qualifier. Preliminary ratings, with the "prelim" suffix, may be assigned to obligors or obligations, including financial programs, in the circumstances described below. Assignment of a final rating is conditional on the receipt by S&P Global Ratings of appropriate documentation. S&P Global Ratings reserves the right not to issue a final rating. Moreover, if a final rating is issued, it may differ from the preliminary rating.

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Preliminary ratings may be assigned to obligations, most commonly structured and project finance issues, pending receipt of final documentation and legal opinions.

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Preliminary ratings may be assigned to obligations that will likely be issued upon the obligor's emergence from bankruptcy or similar reorganization, based on late-stage reorganization plans, documentation and discussions with the obligor.

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Preliminary ratings may also be assigned to the obligors. These ratings consider the anticipated general credit quality of the reorganized or post-bankruptcy issuer as well as attributes of the anticipated obligation(s).

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Preliminary ratings may be assigned to entities that are being formed or that are in the process of being independently established when, in S&P Global Ratings' opinion, documentation is close to final. Preliminary ratings may also be assigned to the obligations of these entities.

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Preliminary ratings may be assigned when a previously unrated entity is undergoing a well-formulated restructuring, recapitalization, significant financing or other transformative event, generally at the point that investor or lender commitments are invited. The preliminary rating may be assigned to the entity and to its proposed obligation(s). These preliminary ratings consider the anticipated general credit quality of the obligor, as well as attributes of the anticipated obligation(s), assuming successful completion of the transformative event. Should the transformative event not occur, S&P Global Ratings would likely withdraw these preliminary ratings.

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A preliminary recovery rating may be assigned to an obligation that has a preliminary issue credit rating.

Termination structures: "t" qualifier. This symbol indicates termination structures that are designed to honor their contracts to full maturity or, should certain events occur, to terminate and cash settle all their contracts before their final maturity date.

Counterparty instrument rating: "cir" qualifier. This symbol indicates a Counterparty Instrument Rating (CIR), which is a forward-looking opinion about the creditworthiness of an issuer in a securitization structure with respect to a specific financial obligation to a counterparty (including interest rate swaps, currency swaps, and liquidity facilities). The CIR is determined on an ultimate payment basis; these opinions do not take into account timeliness of payment.

Description of Fitch Ratings' Corporate Finance Obligation Ratings:

Ratings of individual securities or financial obligations of a corporate issuer address relative vulnerability to default on an ordinal scale. In addition, for financial obligations in corporate finance, a measure of recovery given default on that liability is also included in the rating assessment. This notably applies to covered bonds ratings, which incorporate both an indication of the probability of default and of the recovery given a default of this debt instrument. On the contrary, ratings of debtor-in-possession (DIP) obligations incorporate the expectation of full repayment.

The relationship between the issuer scale and obligation scale assumes a generic historical average recovery. Individual obligations can be assigned ratings, higher, lower, or the same as that entity's issuer rating or Issuer Default Rating (IDR), based on their relative ranking, relative vulnerability to default or based on explicit Recovery Ratings.

As a result, individual obligations of entities, such as corporations, are assigned ratings higher, lower, or the same as that entity's issuer rating or IDR, except DIP obligation ratings that are not based off an IDR. At the lower end of the ratings scale, Fitch publishes explicit Recovery Ratings in many cases to complement issuer and obligation ratings.

AAA:Highest credit quality. "AAA" ratings denote the lowest expectation of credit risk. They are assigned only in cases of exceptionally strong capacity for payment of financial commitments. This capacity is highly unlikely to be adversely affected by foreseeable events.

AA:Very high credit quality. "AA" ratings denote expectations of very low credit risk. They indicate very strong capacity for payment of financial commitments. This capacity is not significantly vulnerable to foreseeable events.

A:High credit quality. "A" ratings denote expectations of low credit risk. The capacity for payment of financial commitments is considered strong. This capacity may, nevertheless, be more vulnerable to adverse business or economic conditions than is the case for higher ratings.

BBB:Good credit quality. "BBB" ratings indicate that expectations of credit risk are currently low. The capacity for payment of financial commitments is considered adequate but adverse business or economic conditions are more likely to impair this capacity.

BB:Speculative. "BB" ratings indicate an elevated vulnerability to credit risk, particularly in the event of adverse changes in business or economic conditions over time; however, business or financial alternatives may be available to allow financial commitments to be met.

B:Highly speculative. "B" ratings indicate that material credit risk is present.

CCC: Substantial credit risk. "CCC" ratings indicate that substantial credit risk is present.

CC:Very high levels of credit risk. "CC" ratings indicate very high levels of credit risk.

C:Exceptionally high levels of credit risk. "C" indicates exceptionally high levels of credit risk.

The ratings of corporate finance obligations are linked to Issuer Default Ratings (or sometimes Viability Ratings for banks) by i) recovery expectations, including as often indicated by Recovery Ratings assigned in the case of low speculative grade issuers and ii) for banks an assessment of non-performance risk relative to the risk captured in the Issuer Default Rating or Viability Rating (e.g. in respect of certain hybrid securities).

For performing obligations, the obligation rating represents the risk of default and takes into account the effect of expected recoveries on the credit risk should a default occur.

If the obligation rating is higher than the rating of the issuer, this indicates above average recovery expectations in the event of default. If the obligations rating is lower than the rating of the issuer, this indicates low expected recoveries should default occur.

Ratings in the categories of "CCC", "CC" and "C" can also relate to obligations or issuers that are in default. In this case, the rating does not opine on default risk but reflects the recovery expectation only.

Description of Fitch Ratings' Issuer Default Ratings:

Rated entities in a number of sectors, including financial and non-financial corporations, sovereigns, insurance companies and certain sectors within public finance, are generally assigned Issuer Default Ratings (IDRs). IDRs are also assigned to certain entities or enterprises in global infrastructure, project finance and public finance. IDRs opine on an entity's relative vulnerability to default (including by way of a distressed debt exchange) on financial obligations. The threshold default risk addressed by the IDR is generally that of the financial obligations whose non-payment would best reflect the uncured failure of that entity. As such, IDRs also address relative vulnerability to bankruptcy, administrative receivership or similar concepts.

In aggregate, IDRs provide an ordinal ranking of issuers based on the agency's view of their relative vulnerability to default, rather than a prediction of a specific percentage likelihood of default.

AAA:Highest credit quality. "AAA" ratings denote the lowest expectation of default risk. They are assigned only in cases of exceptionally strong capacity for payment of financial commitments. This capacity is highly unlikely to be adversely affected by foreseeable events.

AA: Very high credit quality. "AA" ratings denote expectations of very low default risk. They indicate very strong capacity for payment of financial commitments. This capacity is not significantly vulnerable to foreseeable events.

A:High credit quality. "A" ratings denote expectations of low default risk. The capacity for payment of financial commitments is considered strong. This capacity may, nevertheless, be more vulnerable to adverse business or economic conditions than is the case for higher ratings.

BBB:Good credit quality. "BBB" ratings indicate that expectations of default risk are currently low. The capacity for payment of financial commitments is considered adequate but adverse business or economic conditions are more likely to impair this capacity.

BB: Speculative. "BB" ratings indicate an elevated vulnerability to default risk, particularly in the event of adverse changes in business or economic conditions over time; however, business or financial flexibility exists that supports the servicing of financial commitments.

B:Highly speculative. "B" ratings indicate that material default risk is present, but a limited margin of safety remains. Financial commitments are currently being met; however, capacity for continued payment is vulnerable to deterioration in the business and economic environment.

CCC:Substantial credit risk. Default is a real possibility.

CC:Very high levels of credit risk. Default of some kind appears probable.

C:Near default. A default or default-like process has begun, or the issuer is in standstill, or for a closed funding vehicle, payment capacity is irrevocably impaired. Conditions that are indicative of a "C" category rating for an issuer include:

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the issuer has entered into a grace or cure period following non-payment of a material financial obligation;

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the issuer has entered into a temporary negotiated waiver or standstill agreement following a payment default on a material financial obligation;

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the formal announcement by the issuer or their agent of a distressed debt exchange;

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a closed financing vehicle where payment capacity is irrevocably impaired such that it is not expected to pay interest and/or principal in full during the life of the transaction, but where no payment default is imminent

RD: Restricted default. "RD" ratings indicate an issuer that in Fitch's opinion has experienced:

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an uncured payment default or distressed debt exchange on a bond, loan or other material financial obligation, but

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has not entered into bankruptcy filings, administration, receivership, liquidation, or other formal winding-up procedure, and has not otherwise ceased operating. This would include:

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the selective payment default on a specific class or currency of debt;

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the uncured expiry of any applicable grace period, cure period or default forbearance period following a payment default on a bank loan, capital markets security or other material financial obligation;

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the extension of multiple waivers or forbearance periods upon a payment default on one or more material financial obligations, either in series or in parallel; ordinary execution of a distressed debt exchange on one or more material financial obligations.

D:Default. "D" ratings indicate an issuer that in Fitch's opinion has entered into bankruptcy filings, administration, receivership, liquidation or other formal winding-up procedure or that has otherwise ceased business.

Default ratings are not assigned prospectively to entities or their obligations; within this context, non-payment on an instrument that contains a deferral feature or grace period will generally not be considered a default until after the expiration of the deferral or grace period, unless a default is otherwise driven by bankruptcy or other similar circumstance, or by a distressed debt exchange.

In all cases, the assignment of a default rating reflects the agency's opinion as to the most appropriate rating category consistent with the rest of its universe of ratings and may differ from the definition of default under the terms of an issuer's financial obligations or local commercial practice.

Description of Fitch Ratings' Structured Finance Long-Term Obligation Ratings:

Ratings of structured finance obligations on the long-term scale consider the obligations' relative vulnerability to default. These ratings are typically assigned to an individual security or tranche in a transaction and not to an issuer.

AAA: Highest credit quality.

"AAA" ratings denote the lowest expectation of default risk. They are assigned only in cases of exceptionally strong capacity for payment of financial commitments. This capacity is highly unlikely to be adversely affected by foreseeable events.

AA: Very high credit quality.

"AA" ratings denote expectations of very low default risk. They indicate very strong capacity for payment of financial commitments. This capacity is not significantly vulnerable to foreseeable events.

A: High credit quality.

"A" ratings denote expectations of low default risk. The capacity for payment of financial commitments is considered strong. This capacity may, nevertheless, be more vulnerable to adverse business or economic conditions than is the case for higher ratings.

BBB: Good credit quality.

"BBB" ratings indicate that expectations of default risk are currently low. The capacity for payment of financial commitments is considered adequate, but adverse business or economic conditions are more likely to impair this capacity.

BB: Speculative.

"BB" ratings indicate an elevated vulnerability to default risk, particularly in the event of adverse changes in business or economic conditions over time.

B: Highly speculative.

"B" ratings indicate that material default risk is present, but a limited margin of safety remains. Financial commitments are currently being met; however, capacity for continued payment is vulnerable to deterioration in the business and economic environment.

CCC: Substantial credit risk.

Default is a real possibility.

CC: Very high levels of credit risk.

Default of some kind appears probable.

C: Exceptionally high levels of credit risk.

Default appears imminent or inevitable.

D: Default.

Indicates a default. Default generally is defined as one of the following:

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Failure to make payment of principal and/or interest under the contractual terms of the rated obligation;

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bankruptcy filings, administration, receivership, liquidation or other winding-up or cessation of the business of an issuer/obligor; or

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distressed exchange of an obligation, where creditors were offered securities with diminished structural or economic terms compared with the existing obligation to avoid a probable payment default.

Description of Fitch Ratings' Country Ceilings Ratings:

Country Ceilings are expressed using the symbols of the long-term issuer primary credit rating scale and relate to sovereign jurisdictions also rated by Fitch on the Issuer Default Rating (IDR) scale. They reflect the agency's judgment regarding the risk of capital and exchange controls being imposed by the sovereign authorities that would prevent or materially impede the private sector's ability to convert local currency into foreign currency and transfer to non-resident creditors - transfer and convertibility (T&C) risk. They are not ratings but expressions of a cap for the foreign currency issuer ratings of most, but not all, issuers in a given country. Given the close correlation between sovereign credit and T&C risks, the Country Ceiling may exhibit a greater degree of volatility than would normally be expected when it lies above the sovereign Foreign Currency Rating.

Description of Fitch Ratings' Public Finance and Global Infrastructure Obligation Ratings:

Ratings of public finance obligations and ratings of infrastructure and project finance obligations on the long-term scale, including the financial obligations of sovereigns, consider the obligations' relative vulnerability to default. These ratings are assigned to an individual security, instrument or tranche in a transaction. In some cases, considerations of recoveries canhave an influence on obligation ratings in infrastructure and project finance. In limited cases in U.S. public finance, where Chapter 9 of the Bankruptcy Code provides reliably superior prospects for ultimate recovery to local government obligations that benefit from a statutory lien on revenues, Fitch reflects this in a security rating with limited notching above the IDR. Recovery expectations can also be reflected in a security rating in the U.S. during the pendency of a bankruptcy proceeding under the Code if there is sufficient visibility on potential recovery prospects.

AA:Very high credit quality. "AA" ratings denote expectations of very low default risk. They indicate very strong capacity for payment of financial commitments. This capacity is not significantly vulnerable to foreseeable events.

BB:Speculative. "BB" ratings indicate an elevated vulnerability to default risk, particularly in the event of adverse changes in business or economic conditions over time..

CCC:Substantial credit risk. Default is a real possibility.

CC:Very high levels of credit risk. Default of some kind appears probable.

C:Exceptionally high levels of credit risk. Default appears imminent or inevitable.

D:Default. Indicates a default. Default generally is defined as one of the following:

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Failure to make payment of principal and/or interest under the contractual terms of the rated obligation;

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bankruptcy filings, administration, receivership, liquidation or other winding-up or cessation of the business of an issuer/obligor where payment default on an obligation is a virtual certainty; or

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distressed exchange of an obligation, where creditors were offered securities with diminished structural or economic terms compared with the existing obligation to avoid a probable payment default.

Notes: In U.S. public finance, obligations may be pre-refunded, where funds sufficient to meet the requirements of the respective obligations are placed in an escrow account. When obligation ratings are maintained based on the escrowed funds and their structural elements, the ratings carry the suffix "pre" (e.g. "AAApre", "AA+pre").

Structured Finance Defaults

"Imminent" default, categorized under "C", typically refers to the occasion where a payment default has been intimated by the issuer, and is all but inevitable. This may, for example, be where an issuer has missed a scheduled payment, but (as is typical) has a grace period during which it may cure the payment default. Another alternative would be where an issuer has formally announced a distressed debt exchange, but the date of the exchange still lies several days or weeks in the immediate future.

Additionally, in structured finance transactions, where analysis indicates that an instrument is irrevocably impaired such that it is not expected to pay interest and/or principal in full in accordance with the terms of the obligation's documentation during the life of the transaction, but where no payment default in accordance with the terms of the documentation is imminent, the obligation will typically be rated in the "C" category.

Structured Finance Write-downs

Where an instrument has experienced an involuntary and, in the agency's opinion, irreversible "write-down" of principal (i.e. other than through amortization, and resulting in a loss to the investor), a credit rating of "D" will be assigned to the instrument. Where the agency believes the "write-down" may prove to be temporary (and the loss may be "written up" again in future if and when performance improves), then a credit rating of "C" will typically be assigned. Should the "write-down" then later be reversed, the credit rating will be raised to an appropriate level for that instrument. Should the "write-down" later be deemed as irreversible, the credit rating will be lowered to "D".

Notes: In the case of structured and project finance, while the ratings do not address the loss severity given default of the rated liability, loss severity assumptions on the underlying assets are nonetheless typically included as part of the analysis. Loss severity assumptions are used to derive pool cash flows available to service the rated liability.

The suffix "sf" denotes an issue that is a structured finance transaction.

Enhanced Equipment Trust Certificates (EETCs) are corporate-structured hybrid debt securities that airlines typically use to finance aircraft equipment. Due to the hybrid characteristics of these bonds, Fitch's rating approach incorporates elements of both the structured finance and corporate rating methodologies. Although rated as asset-backed securities, unlike other structured finance ratings, EETC ratings involve a measure of recovery given default akin to ratings of financial obligations in corporate finance, as described above.

Description of Fitch Ratings' Short-Term Ratings Assigned to Issuers and Obligations:

A short-term issuer or obligation rating is based in all cases on the short-term vulnerability to default of the rated entity or security stream and relates to the capacity to meet financial obligations in accordance with the documentation governing the relevant obligation. Short-term deposit ratings may be adjusted for loss severity. Short-Term Ratings are assigned to obligations whose initial maturity is viewed as "short term" based on market convention.8Typically, this means up to 13 months for corporate, sovereign, and structured obligations, and up to 36 months for obligations in U.S. public finance markets.

F1:Highest short-term credit quality. Indicates the strongest intrinsic capacity for timely payment of financial commitments; may have an added "+" to denote any exceptionally strong credit feature.

F2:Good short-term credit quality. Good intrinsic capacity for timely payment of financial commitments.

F3:Fair short-term credit quality. The intrinsic capacity for timely payment of financial commitments is adequate.

B:Speculative short-term credit quality. Minimal capacity for timely payment of financial commitments, plus heightened vulnerability to near term adverse changes in financial and economic conditions.

C:High short-term default risk. Default is a real possibility.

RD:Restricted default. Indicates an entity that has defaulted on one or more of its financial commitments, although it continues to meet other financial obligations. Typically applicable to entity ratings only.

D:Default. Indicates a broad-based default event for an entity, or the default of a short-term obligation.

A long-term rating can also be used to rate an issuer with short maturity.

20. Appendix B - Proxy voting policies and procedures

Policy

Each of the Pioneer Funds and certain other clients of Amundi Asset Management US, Inc. ("Amundi US") have delegated responsibility to vote proxies related to portfolio holdings to Amundi US. Amundi US is a fiduciary that owes each of its clients the duties of care and loyalty with respect to all services undertaken on the client's behalf, including voting proxies for securities held by the client. When Amundi US has been delegated proxy-voting authority for a client, the duty of care requires Amundi US to monitor corporate events and to vote the proxies. To satisfy its duty of loyalty, Amundi US must place the client's interests ahead of its own and must cast proxy votes in a manner consistent with the best interest of the client. It is Amundi US's policy to vote proxies presented to Amundi US in a timely manner in accordance with these principles.

Amundi US's fundamental concern in voting proxies is the economic effect of the proposal on the value of portfolio holdings, considering both the short- and long-term impact. In many instances, Amundi US believes that supporting the company's strategy and voting "for" management's proposals builds portfolio value. In other cases, however, proposals set forth by management may have a negative effect on that value, while some shareholder proposals may hold the best prospects for enhancing it. Amundi US monitors developments in the proxy voting arena and will revise this policy as needed.

Amundi US believes that environmental, social and governance (ESG) factors can affect companies' long-term prospects for success and the sustainability of their business models. Since ESG factors that may affect corporate performance and economic value are considered by our investment professionals as part of the investment management process, Amundi US also considers these factors when reviewing proxy proposals. This approach is consistent with the stated investment objectives and policies of funds and investment strategies.

It should be noted that the proxy voting guidelines below are guidelines, not rules, and Amundi US reserves the right in all cases to vote contrary to guidelines where doing so is determined to represent the best economic interests of our clients. Further, the Pioneer Funds or other clients of Amundi US may direct Amundi US to vote contrary to guidelines.

Amundi US's clients may request copies of their proxy voting records and of Amundi US's proxy voting policies and procedures by either sending a written request to Amundi US's Proxy Coordinator, or clients may review Amundi US's proxy voting policies and procedures on-line at amundi.com/usinvestors. Amundi US may describe to clients its proxy voting policies and procedures by delivering a copy of Amundi US's Form ADV (Part II), by separate notice to the client or by other means.

Applicability

This Proxy Voting policy and the procedures set forth below are designed to complement Amundi US's investment policies and procedures regarding its general responsibility to monitor the performance and/or corporate events of companies that are issuers of securities held in accounts managed by Amundi US. This policy sets forth Amundi US's position on a number of issues for which proxies may be solicited but it does not include all potential voting scenarios or proxy events. Furthermore, because of the special issues associated with proxy solicitations by closed-end Funds, Amundi US will vote shares of closed-end Funds on a case-by-case basis.

Purpose

The purpose of this policy is to ensure that proxies for United States ("US") and non-US companies that are received in a timely manner will be voted in accordance with the principles stated above. Unless the Proxy Voting Oversight Group (as described below) specifically determines otherwise, all shares in a company held by Amundi US-managed accounts for which Amundi US has proxy-voting authority will be voted alike, unless a client has given specific voting instructions on an issue.

Amundi US does not delegate the authority to vote proxies relating to securities held by its clients to any of its affiliates. Any questions about this policy should be directed to Amundi US's Chief of Staff, US Investment Management (the "Proxy Coordinator").

Procedures

Proxy Voting Service

Amundi US has engaged an independent proxy voting service to assist in the voting of proxies. The proxy voting service works with custodians to ensure that all proxy materials are received by the custodians and are processed in a timely fashion. The proxy voting service votes all proxies in accordance with the proxy voting guidelines established by Amundi US and set forth herein, to the extent applicable. The proxy voting service will refer proxy questions to the Proxy Coordinator (described below) for instructions under circumstances where: (1) the application of the proxy voting guidelines is unclear; (2) a particular proxy question is not covered by the guidelines; or (3) the guidelines call for specific instructions on a case-by-case basis. The proxy voting service is also requested to call to the Proxy Coordinator's attention specific proxy questions that, while governed by a guideline, appear to involve unusual or controversial issues. Amundi US reserves the right to attend a meeting in person and may do so when it determines that the company or the matters to be voted on at the meeting are strategically important to its clients.

To supplement its own research and analysis in determining how to vote on a particular proxy proposal, Amundi US may utilize research, analysis or recommendations provided by the proxy voting service on a case-by-case basis. Amundi US does not, as a policy, follow the assessments or recommendations provided by the proxy voting service without its own analysis and determination.

Proxy Coordinator

The Proxy Coordinator coordinates the voting, procedures and reporting of proxies on behalf of Amundi US's clients. The Proxy Coordinator will deal directly with the proxy voting service and, in the case of proxy questions referred by the proxy voting service, will solicit voting recommendations and instructions from the Portfolio Management Group, or, to the extent applicable, investment sub-advisers. The Proxy Coordinator is responsible for ensuring that these questions and referrals are responded to in a timely fashion and for transmitting appropriate voting instructions to the proxy voting service. The Proxy Coordinator is responsible for verifying with the General Counsel or his or her designee whether Amundi US's voting power is subject to any limitations or guidelines issued by the client (or in the case of an employee benefit plan, the plan's trustee or other fiduciaries).

Referral Items

The proxy voting service will refer proxy questions to the Proxy Coordinator or his or her designee that are described by Amundi US's proxy voting guidelines as to be voted on a case-by-case basis, that are not covered by Amundi US's guidelines or where Amundi US's guidelines may be unclear with respect to the matter to be voted on. Under such circumstances, the Proxy Coordinator will seek a written voting recommendation from the Chief Investment Officer, U.S. or his or her designated equity portfolio-management representative. Any such recommendation will include: (i) the manner in which the proxies should be voted; (ii) the rationale underlying any such decision; and (iii) the disclosure of any contacts or communications made between Amundi US and any outside parties concerning the proxy proposal prior to the time that the voting instructions are provided.

Securities Lending

In accordance with industry standards, proxies are not available to be voted when the shares are out on loan through either Amundi US's lending program or a client's managed security lending program. However, Amundi US will reserve the right to recall lent securities so that they may be voted according to Amundi US's instructions. If a portfolio manager would like to vote a block of previously lent shares, the Proxy Coordinator will work with the portfolio manager and Investment Operations to recall the security, to the extent possible, to facilitate the vote on the entire block of shares. Certain clients participate in securities lending programs. Although such programs allow for the recall of securities for any reason, Amundi US may determine not to vote securities on loan and it may not always be possible for securities on loan to be recalled in time to be voted.

Share-Blocking

"Share-blocking" is a market practice whereby shares are sent to a custodian (which may be different than the account custodian) for record keeping and voting at the general meeting. The shares are unavailable for sale or delivery until the end of the blocking period (typically the day after general meeting date).

Amundi US will vote in those countries with "share-blocking." In the event a manager would like to sell a security with "share-blocking", the Proxy Coordinator will work with the Portfolio Manager and Investment Operations

Department to recall the shares (as allowable within the market time-frame and practices) and/or communicate with executing brokerage firm. A list of countries with "share-blocking" is available from the Investment Operations Department upon request.

Proxy Voting Oversight Group

The members of the Proxy Voting Oversight Group include Amundi US's Chief Investment Officer, U.S. or his or her designated equity portfolio management representative, the Chief of Staff, U.S., and the Chief Compliance Officer of the Adviser and Funds. Other members of Amundi US will be invited to attend meetings and otherwise participate as necessary. The Chief of Staff, U.S. will chair the Proxy Voting Oversight Group.

The Proxy Voting Oversight Group is responsible for developing, evaluating, and changing (when necessary) Amundi US's proxy voting policies and procedures. The Group meets at least annually to evaluate and review this policy and the services of its third-party proxy voting service. In addition, the Proxy Voting Oversight Group will meet as necessary to vote on referral items and address other business as necessary.

Amendments

Amundi US may not amend this policy without the prior approval of the Proxy Voting Oversight Group. Amendments to this policy with respect to votes to be cast on behalf of any of the Pioneer Funds also shall be presented to the Board of the Pioneer Funds for its review and advance approval.

Form N-PX

The Proxy Coordinator and the Director of Regulatory Reporting are responsible for ensuring that Form N-PX documents receive the proper review by a member of the Proxy Voting Oversight Group prior to a Fund officer signing the forms.

The Proxy Coordinator will provide the Compliance department with a copy of each Form N-PX filing prepared by the proxy voting service.

Compliance files N-PX. The Compliance department will ensure that a corresponding Form N-PX exists for each Amundi US registered investment company.

Following this review, each Form N-PX is formatted for public dissemination via the EDGAR system.

Prior to submission, each Form N-PX is to be presented to the Fund officer for a final review and signature.

Copies of the Form N-PX filings and their submission receipts are maintained according to Amundi US record keeping policies.

Proxy Voting Guidelines

Administrative

While administrative items appear infrequently in U.S. issuer proxies, they are quite common in non-U.S. proxies.

We will generally support these and similar management proposals:

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Corporate name change.

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A change of corporate headquarters.

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Stock exchange listing.

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Establishment of time and place of annual meeting.

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Adjournment or postponement of annual meeting.

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Acceptance/approval of financial statements.

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Approval of dividend payments, dividend reinvestment plans and other dividend-related proposals.

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Approval of minutes and other formalities.

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Authorization of the transferring of reserves and allocation of income.

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Amendments to authorized signatories.

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Approval of accounting method changes or change in fiscal year-end.

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Acceptance of labor agreements.

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Appointment of internal auditors.

Amundi US will vote on a case-by-case basis on other routine administrative items; however, Amundi US will oppose any routine proposal if insufficient information is presented in advance to allow Amundi US to judge the merit of the proposal. Amundi US has also instructed its proxy voting service to inform Amundi US of its analysis of any administrative items that may be inconsistent, in its view, with Amundi US's goal of supporting the value of its clients' portfolio holdings so that Amundi US may consider and vote on those items on a case-by-case basis in its discretion.

Auditors

We normally vote for proposals to:

Ratify the auditors. We will consider a vote against if we are concerned about the auditors' independence or their past work for the company. Specifically, we will oppose the ratification of auditors and withhold votes for audit committee members if non-audit fees paid by the company to the auditing firm exceed the sum of audit fees plus audit-related fees plus permissible tax fees according to the disclosure categories proposed by the Securities and Exchange Commission.

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Restore shareholder rights to ratify the auditors.

We will normally oppose proposals that require companies to:

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Seek bids from other auditors.

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Rotate auditing firms, except where the rotation is statutorily required or where rotation would demonstrably strengthen financial disclosure.

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Indemnify auditors.

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Prohibit auditors from engaging in non-audit services for the company.

Board of Directors

On issues related to the board of directors, Amundi US normally supports management. We will, however, consider a vote against management in instances where corporate performance has been poor or where the board appears to lack independence. We also believe that a well-balanced board with diverse perspectives is conducive to sound corporate governance. In our view, diversity of expertise, skills, gender, ethnicity and race may contribute to the overall quality of decision-making and risk management.

General Board Issues

Amundi US will vote for:

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Audit, compensation and nominating committees composed of independent directors exclusively.

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Indemnification for directors for actions taken in good faith in accordance with the business judgment rule. We will vote against proposals for broader indemnification.

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Changes in board size that appear to have a legitimate business purpose and are not primarily for anti-takeover reasons.

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Election of an honorary director.

We will vote against:

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Minimum stock ownership by directors.

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Term limits for directors. Companies benefit from experienced directors, and shareholder control is better achieved through annual votes.

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Requirements for union or special interest representation on the board.

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Requirements to provide two candidates for each board seat.

We will vote on a case-by case basis on these issues:

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Separate chairman and CEO positions. We will consider voting with shareholders on these issues in cases of poor corporate performance.

Elections of Directors

In uncontested elections of directors we will vote against:

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Individual directors with absenteeism above 25% without valid reason. We support proposals that require disclosure of director attendance.

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Insider directors and affiliated outsiders who sit on the audit, compensation, stock option or nominating committees. For the purposes of our policy, we use the definition of affiliated directors provided by our proxy voting service.

We will also vote against:

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Directors who have failed to act on a takeover offer where the majority of shareholders have tendered their shares.

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Directors who appear to lack independence or are associated with poor corporate or governance performance.

We will vote on a case-by case basis on these issues:

Re-election of directors who have implemented or renewed a dead hand or modified dead-hand poison pill (a "dead-hand poison pill" is a shareholder rights plan that may be altered only by incumbent or "dead" directors. These plans prevent a potential acquirer from disabling a poison pill by obtaining control of the board through a proxy vote).

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Contested election of directors.

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Election of a greater number of independent directors (in order to move closer to a majority of independent directors) in cases of poor performance.

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Mandatory retirement policies.

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Directors who have ignored a shareholder proposal that has been approved by shareholders for two consecutive years.

We will vote for:

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Precatory and binding resolutions requesting that the board changes the company's bylaws to stipulate that directors need to be elected with affirmative majority of votes cast, provided that the resolutions allow for plurality voting in cases of contested elections.

Takeover-Related Measures

Amundi US is generally opposed to proposals that may discourage takeover attempts. We believe that the potential for a takeover helps ensure that corporate performance remains high.

Amundi US will vote for:

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Cumulative voting.

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Increasing the ability for shareholders to call special meetings.

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Increasing the ability for shareholders to act by written consent.

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Restrictions on the ability to make greenmail payments.

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Submitting rights plans to shareholder vote.

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Rescinding shareholder rights plans ("poison pills").

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Opting out of the following state takeover statutes:

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Control share acquisition statutes, which deny large holders voting rights on holdings over a specified threshold.

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Control share cash-out provisions, which require large holders to acquire shares from other holders.

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Freeze-out provisions, which impose a waiting period on large holders before they can attempt to gain control.

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Stakeholder laws, which permit directors to consider interests of non-shareholder constituencies.

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Disgorgement provisions, which require acquirers to disgorge profits on purchases made before gaining control.

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Fair price provisions.

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Authorization of shareholder rights plans.

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Labor protection provisions.

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Mandatory classified boards.

We will vote on a case-by-case basis on the following issues:

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Fair price provisions. We will vote against provisions requiring supermajority votes to approve takeovers. We will also consider voting against proposals that require a supermajority vote to repeal or amend the provision. Finally, we will consider the mechanism used to determine the fair price; we are generally opposed to complicated formulas or requirements to pay a premium.

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Opting out of state takeover statutes regarding fair price provisions. We will use the criteria used for fair price provisions in general to determine our vote on this issue.

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Proposals that allow shareholders to nominate directors.

We will vote against:

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Classified boards, except in the case of closed-end funds, where we shall vote on a case-by-case basis.

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Limiting shareholder ability to remove or appoint directors. We will support proposals to restore shareholder authority in this area. We will review on case-by-case basis proposals that authorize the board to make interim appointments.

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Classes of shares with unequal voting rights.

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Supermajority vote requirements.

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Severance packages ("golden" and "tin" parachutes). We will support proposals to put these packages to shareholder vote.

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Reimbursement of dissident proxy solicitation expenses. While we ordinarily support measures that encourage takeover bids, we believe that management should have full control over corporate funds.

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Extension of advance notice requirements for shareholder proposals.

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Granting board authority normally retained by shareholders, particularly the right to amend the corporate charter.

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Shareholder rights plans ("poison pills"). These plans generally allow shareholders to buy additional shares at a below-market price in the event of a change in control and may deter some bids.

Capital Structure

Managements need considerable flexibility in determining the company's financial structure, and Amundi US normally supports managements' proposals in this area. We will, however, reject proposals that impose high barriers to potential takeovers.

Amundi US will vote for:

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Changes in par value.

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Reverse splits, if accompanied by a reduction in number of shares.

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Shares repurchase programs, if all shareholders may participate on equal terms.

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Bond issuance.

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Increases in "ordinary" preferred stock.

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Proposals to have blank-check common stock placements (other than shares issued in the normal course of business) submitted for shareholder approval.

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Cancellation of company treasury shares.

We will vote on a case-by-case basis on the following issues:

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Reverse splits not accompanied by a reduction in number of shares, considering the risk of delisting.

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Increase in authorized common stock. We will make a determination considering, among other factors:

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Number of shares currently available for issuance;

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Size of requested increase (we would normally approve increases of up to 100% of current authorization);

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Proposed use of the proceeds from the issuance of additional shares; and

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Potential consequences of a failure to increase the number of shares outstanding (e.g., delisting or bankruptcy).

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Blank-check preferred. We will normally oppose issuance of a new class of blank-check preferred, but may approve an increase in a class already outstanding if the company has demonstrated that it uses this flexibility appropriately.

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Proposals to submit private placements to shareholder vote.

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Other financing plans.

We will vote against preemptive rights that we believe limit a company's financing flexibility.

Compensation

Amundi US supports compensation plans that link pay to shareholder returns and believes that management has the best understanding of the level of compensation needed to attract and retain qualified people. At the same time, stock-related compensation plans have a significant economic impact and a direct effect on the balance sheet. Therefore, while we do not want to micromanage a company's compensation programs, we place limits on the potential dilution these plans may impose.

Amundi US will vote for:

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401(k) benefit plans.

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Employee stock ownership plans (ESOPs), as long as shares allocated to ESOPs are less than 5% of outstanding shares. Larger blocks of stock in ESOPs can serve as a takeover defense. We will support proposals to submit ESOPs to shareholder vote.

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Various issues related to the Omnibus Budget and Reconciliation Act of 1993 (OBRA), including:

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Amendments to performance plans to conform with OBRA;

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Caps on annual grants or amendments of administrative features;

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Adding performance goals; and

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Cash or cash-and-stock bonus plans.

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Establish a process to link pay, including stock-option grants, to performance, leaving specifics of implementation to the company.

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Require that option repricing be submitted to shareholders.

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Require the expensing of stock-option awards.

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Require reporting of executive retirement benefits (deferred compensation, split-dollar life insurance, SERPs, and pension benefits).

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Employee stock purchase plans where the purchase price is equal to at least 85% of the market price, where the offering period is no greater than 27 months and where potential dilution (as defined below) is no greater than 10%.

We will vote on a case-by-case basis on the following issues:

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Shareholder proposals seeking additional disclosure of executive and director pay information.

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Executive and director stock-related compensation plans. We will consider the following factors when reviewing these plans:

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The program must be of a reasonable size. We will approve plans where the combined employee and director plans together would generate less than 15% dilution. We will reject plans with 15% or more potential dilution.

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Dilution = (A + B + C) / (A + B + C + D), where

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A = Shares reserved for plan/amendment,

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B = Shares available under continuing plans,

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C = Shares granted but unexercised and

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D = Shares outstanding.

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The plan must not:

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Explicitly permit unlimited option repricing authority or have allowed option repricing in the past without shareholder approval.

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Be a self-replenishing "evergreen" plan or a plan that grants discount options and tax offset payments.

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We are generally in favor of proposals that increase participation beyond executives.

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We generally support proposals asking companies to adopt rigorous vesting provisions for stock option plans such as those that vest incrementally over, at least, a three- or four-year period with a pro rata portion of the shares becoming exercisable on an annual basis following grant date.

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We generally support proposals asking companies to disclose their window period policies for stock transactions. Window period policies ensure that employees do not exercise options based on insider information contemporaneous with quarterly earnings releases and other material corporate announcements.

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We generally support proposals asking companies to adopt stock holding periods for their executives.

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All other employee stock purchase plans.

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All other compensation-related proposals, including deferred compensation plans, employment agreements, loan guarantee programs and retirement plans.

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All other proposals regarding stock compensation plans, including extending the life of a plan, changing vesting restrictions, repricing options, lengthening exercise periods or accelerating distribution of awards and pyramiding and cashless exercise programs.

We will vote against:

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Pensions for non-employee directors. We believe these retirement plans reduce director objectivity.

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Elimination of stock option plans.

We will vote on a case-by case basis on these issues:

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Limits on executive and director pay.

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Stock in lieu of cash compensation for directors.

Corporate Governance

Amundi US will vote for:

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Confidential voting.

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Equal access provisions, which allow shareholders to contribute their opinions to proxy materials.

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Proposals requiring directors to disclose their ownership of shares in the company.

We will vote on a case-by-case basis on the following issues:

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Change in the state of incorporation. We will support reincorporations supported by valid business reasons. We will oppose those that appear to be solely for the purpose of strengthening takeover defenses.

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Bundled proposals. We will evaluate the overall impact of the proposal.

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Adopting or amending the charter, bylaws or articles of association.

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Shareholder appraisal rights, which allow shareholders to demand judicial review of an acquisition price.

We will vote against:

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Shareholder advisory committees. While management should solicit shareholder input, we prefer to leave the method of doing so to management's discretion.

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Limitations on stock ownership or voting rights.

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Reduction in share ownership disclosure guidelines.

Mergers and Restructurings

Amundi US will vote on the following and similar issues on a case-by-case basis:

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Mergers and acquisitions.

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Corporate restructurings, including spin-offs, liquidations, asset sales, joint ventures, conversions to holding company and conversions to self-managed REIT structure.

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Debt restructurings.

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Conversion of securities.

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Issuance of shares to facilitate a merger.

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Private placements, warrants, convertible debentures.

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Proposals requiring management to inform shareholders of merger opportunities.

We will normally vote against shareholder proposals requiring that the company be put up for sale.

Investment Companies

Many of our portfolios may invest in shares of closed-end funds or open-end funds (including exchange-traded funds). The non-corporate structure of these investments raises several unique proxy voting issues.

Amundi US will vote for:

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Establishment of new classes or series of shares.

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Establishment of a master-feeder structure.

Amundi US will vote on a case-by-case basis on:

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Changes in investment policy. We will normally support changes that do not affect the investment objective or overall risk level of the fund. We will examine more fundamental changes on a case-by-case basis.

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Approval of new or amended advisory contracts.

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Changes from closed-end to open-end format.

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Election of a greater number of independent directors.

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Authorization for, or increase in, preferred shares.

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Disposition of assets, termination, liquidation, or mergers.

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Classified boards of closed-end funds, but will typically support such proposals.

In general, business development companies (BDCs) are not considered investment companies for these purposes but are treated as corporate issuers.

Environmental and Social Issues

Amundi US believes that environmental and social issues may influence corporate performance and economic return. Indeed, by analyzing all of a company's risks and opportunities, Amundi US can better assess its intrinsic value and long-term economic prospects.

When evaluating proxy proposals relating to environmental or social issues, decisions are made on a case-by-case basis. We consider each of these proposals based on the impact to the company's shareholders and economic return, the specific circumstances at each individual company, any potentially adverse economic concerns, and the current policies and practices of the company.

For example, shareholder proposals relating to environmental and social issues, and on which we will vote on a base-by-case basis, may include those seeking that a company:

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Conduct studies regarding certain environmental or social issues;

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Study the feasibility of the company taking certain actions with regard to such issues; or

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Take specific action, including adopting or ceasing certain behavior and adopting company standards and principles, in relation to such issues.

In general, Amundi US believes these issues are important and should receive management attention.

Amundi US will support proposals where we believe the proposal, if implemented, would improve the prospects for the long-term success of the business and would provide value to the company and its shareholders. Amundi US may abstain on shareholder proposals with regard to environmental and social issues in cases where we believe the proposal, if implemented, would not be in the economic interests of the company, or where implementing the proposal would constrain management flexibility or would be unduly difficult, burdensome or costly.

When evaluating proxy proposals relating to environmental or social issues, Amundi US may consider the following

factors or other factors deemed relevant, given such weight as deemed appropriate:

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approval of the proposal helps improve the company's practices;

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approval of the proposal can improve shareholder value;

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the company's current stance on the topic is likely to have negative effects on its business position or reputation in the short, medium, or long term;

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the company has already put appropriate action in place to respond to the issue contained in the proposal;

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the company's reasoning against approving the proposal responds appropriately to the various points mentioned by the shareholder when the proposal was presented;

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the solutions recommended in the proposal are relevant and appropriate, and if the topic of the proposal would not be better addressed through another means.

In the event of failures in risk management relating to environmental and social issues, Amundi US may vote against the election of directors responsible for overseeing those areas. Issues of special concern to Amundi US include corporate commitments to mitigating climate effects; achieving a diverse board of directors and employee base; and maintaining safe and sound working conditions, equitable compensation practices, and opportunities for career advancement. Amundi US will vote against proposals calling for substantial changes in the company's business or activities. We will also normally vote against proposals with regard to contributions, believing that management should control the routine disbursement of funds. In each case, the fundamental consideration governing votes cast on behalf of any of the Pioneer Funds in these areas is Amundi US's assessment of the potential impact on shareholder value.

Conflicts of interest

Amundi US recognizes that in certain circumstances a conflict of interest may arise when Amundi US votes a proxy.

A conflict of interest occurs when Amundi US's interests interfere, or appear to interfere, with the interests of Amundi US's clients.

A conflict may be actual or perceived and may exist, for example, when the matter to be voted on concerns:

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An affiliate of Amundi US, such as another company belonging to the Credit Agricole banking group ( "Credit Agricole Affiliate");

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An issuer of a security for which Amundi US acts as a sponsor, advisor, manager, custodian, distributor, underwriter, broker, or other similar capacity (including those securities specifically declared by its parent Amundi to present a conflict of interest for Amundi US);

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An issuer of a security for which Amundi has informed Amundi US that a Credit Agricole Affiliate acts as a sponsor, advisor, manager, custodian, distributor, underwriter, broker, or other similar capacity; or

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A person with whom Amundi US (or any of its affiliates) has an existing, material contract or business relationship.

Any member of the Proxy Voting Oversight Group and any other associate involved in the proxy voting process with knowledge of any apparent or actual conflict of interest must disclose such conflict to the Proxy Coordinator and the Chief Compliance Officer of Amundi US and the Funds. If any associate is lobbied or pressured with respect to any voting decision, whether within or outside of Amundi US, he or she should contact a member of the Proxy Voting Oversight Group or Amundi US's Chief Compliance Officer.

The Proxy Voting Oversight Group will review each item referred to Amundi US by the proxy voting service to determine whether an actual or potential conflict of interest exists in connection with the proposal(s) to be voted upon. The review will be conducted by comparing the apparent parties affected by the proxy proposal being voted upon against the Controller's and Compliance Department's internal list of interested persons and, for any matches found, evaluating the anticipated magnitude and possible probability of any conflict of interest being present. The Proxy Voting Oversight Group may cause any of the following actions to be taken when a conflict of interest is present:

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Vote the proxy in accordance with the vote indicated under "Voting Guidelines," if a vote is indicated, or

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Direct the independent proxy voting service to vote the proxy in accordance with its independent assessment or that of another independent adviser appointed by Amundi US or the applicable client for this purpose.

If the Proxy Voting Oversight Group perceives a material conflict of interest, the Group may also choose to disclose the conflict to the affected clients and solicit their consent to proceed with the vote or their direction (including through a client's fiduciary or other adviser), or may take such other action in good faith (in consultation with counsel) that would protect the interests of clients.

For each referral item, the determination regarding the presence or absence of any actual or potential conflict of interest will be documented in a Conflicts of Interest Report prepared by the Proxy Coordinator.

The Proxy Voting Oversight Group will review periodically the independence of the proxy voting service. This may include a review of the service's conflict management procedures and other documentation and an evaluation as to whether the service continues to have the competency and capacity to vote proxies.

Decisions Not to Vote Proxies

Although it is Amundi US's general policy to vote all proxies in accordance with the principles set forth in this policy, there may be situations in which the Proxy Voting Oversight Group does not vote a proxy referred to it. For example, because of the potential conflict of interest inherent in voting shares of a Credit Agricole Affiliate, Amundi US will abstain from voting the shares unless otherwise directed by a client. In such a case, the Proxy Coordinator will inform Amundi Compliance before exercising voting rights.

There exist other situations in which the Proxy Voting Oversight Group may refrain from voting a proxy. For example, if the cost of voting a foreign security outweighs the benefit of voting, the Group may not vote the proxy. The Group may not be given enough time to process a vote, perhaps because it receives a meeting notice too late or it cannot obtain a translation of the agenda in the time available. If Amundi US has outstanding "sell" orders, the proxies for shares subject to the order may not be voted to facilitate the sale. Although Amundi US may hold shares on a company's record date, if the shares are sold prior to the meeting date the Group may decide not to vote those shares.

Supervision

Escalation

It is each associate's responsibility to contact his or her business unit head, the Proxy Coordinator, a member of the Proxy Voting Oversight Group or Amundi US's Chief Compliance Officer if he or she becomes aware of any possible noncompliance with this policy.

Training

Amundi US will conduct periodic training regarding proxy voting and this policy. It is the responsibility of the business line policy owner and the applicable Compliance Department to coordinate and conduct such training.

Related policies and procedures

Amundi US's Books and Records Policy and the Books and Records of the Pioneer Funds' Policy.

Record Keeping

The Proxy Coordinator shall ensure that Amundi US's proxy voting service:

•

Retains a copy of each proxy statement received (unless the proxy statement is available from the SEC's Electronic Data Gathering, Analysis, and Retrieval (EDGAR) system);

•

Retains a record of the vote cast;

•

Prepares Form N-PX for filing on behalf of each client that is a registered investment company; and

•

Is able to promptly provide Amundi US with a copy of the voting record upon its request.

The Proxy Coordinator shall ensure that for those votes that may require additional documentation (i.e. conflicts of interest, exception votes and case-by-case votes) the following records are maintained:

•

A record memorializing the basis for each referral vote cast;

•

A copy of any document created by Amundi US that was material in making the decision on how to vote the

subject proxy;

•

A copy of any recommendation or analysis furnished by the proxy voting service; and

•

A copy of any conflict notice, conflict consent or any other written communication (including emails or other electronic communications) to or from the client (or in the case of an employee benefit plan, the plan's trustee or other fiduciaries) regarding the subject proxy vote cast by, or the vote recommendation of, Amundi US.

Amundi US shall maintain the above records in the client's file in accordance with applicable regulations.

Related regulations

Form N-1A, Form N-PX, ICA Rule 30b1-4, Rule 31a1-3, Rule 38a-1 and IAA 206(4) -6, Rule 204 -2

Adopted by the Pioneer Funds' Boards of Trustees

October 5, 2004

Effective Date:

October 5, 2004

Revision Dates:

September 2009, December 2015, August 2017, February 2019, January 2021, November 2022, and January 2023

22091-21-0524

PART C - OTHER INFORMATION

Item 28. Exhibits

(a)(1)	Amended and Restated Agreement and Declaration of Trust (January 12, 2016)(6)
(b)	Amended and Restated By-laws (May 15, 2020)(8)
(c)	Specimen Stock Certificate(1)
(d)	Management Agreement with Amundi Asset Management US, Inc. (formerly, Amundi Pioneer Asset Management, Inc.) (July 3, 2017)(7)
(e)(1)	Underwriting Agreement between Registrant and Amundi Distributor US, Inc. (formerly, Amundi Pioneer Distributor, Inc.) (July 3, 2017)(7)
(e)(2)	Dealer Sales Agreement(5)
(f)	None
(g)(1)	Custodian Agreement with The Bank of New York Mellon ("BNY Mellon") (November 1, 2021)(9)
(g)(2)	Amendment to Appendix I to Custodian Agreement with BNY Mellon (November 1, 2022)(10)
(h)(1)	Transfer Agency and Shareholder Services Agreement with BNY Mellon Investment Servicing (US) Inc. (January 19, 2021)(9)
(h)(2)	Amendment No. 4 to Transfer Agency and Shareholder Services Agreement with BNY Mellon Investment Servicing (US) Inc. (November 1, 2022)(10)
(h)(3)	Amended and Restated Administration Agreement with Amundi Asset Management US, Inc. (April 1, 2021)(8)
(h)(4)	Amendment No. 1 to Amended and Restated Administration Agreement with Amundi Asset Management US, Inc. (September 20, 2022)(10)
(h)(5)	Fund Administration and Accounting Agreement with BNY Mellon (November 1, 2021)(9)
(h)(6)	Amended Exhibit A to Fund Administration and Accounting Agreement with BNY Mellon (November 1, 2022)(10)
(i)	Opinion and Consent of Counsel(2)
(j)	Consent of Independent Registered Public Accounting Firm (11)
(k)	None
(l)	Stock Purchase Agreement(1)
(m)(1)	Amended and Restated Pioneer Funds Distribution Plan (November 15, 2022)(10)
(m)(2)	Class R Service Plan(3)
(n)	Multiple Class Plan Pursuant to Rule 18f-3(4)
(o)	Not applicable
(p)	Code of Ethics of the Pioneer Funds, Amundi Distributor US, Inc., and Amundi Asset Management US, Inc. (February 2024)(11)
N/A	Power of Attorney (October 1, 2020)(8)
N/A	Power of Attorney for Craig C. MacKay (March 23, 2021)(8)
N/A	Power of Attorney for Anthony J. Koenig, Jr. (June 1, 2021)(10)

(1)

Previously filed. Incorporated by reference from the Registrant's Post-Effective Amendment No. 12 to the Registration Statement on Form N-1A as filed electronically with the Securities and Exchange Commission (the "SEC" ) on March 29, 1995 (Accession Number 0000812195-95-000013).

(2)

Previously filed. Incorporated by reference from the Registrant's Post-Effective Amendment No. 18 to the Registration Statement on Form N-1A as filed electronically with the SEC on April 29, 1999 (Accession Number 0000812195-99-500008).

(3)

Previously filed. Incorporated by reference from the Registrant's Post-Effective Amendment No. 25 to the Registration Statement on Form N-1A as filed electronically with the SEC on February 18, 2003 (Accession Number 0000831120-03-000004).

(4)

Previously filed. Incorporated by reference from the Registrant's Post-Effective Amendment No. 30 to the Registration Statement on Form N-1A as filed electronically with the SEC on April 29, 2005 (Accession Number 0001016964-05-000188).

(5)

Previously filed. Incorporated herein by reference from the exhibits filed with Post-Effective Amendment No. 32 to the Registration Statement on Form N-1A as filed with the SEC on April 30, 2007 (Accession Number 0001265389-07-000006).

(6)

Previously filed. Incorporated herein by reference from the exhibits filed with Post-Effective Amendment No. 49 to the Registration Statement on Form N-1A as filed with the SEC on April 26, 2016 (Accession Number 0000930709-16-000028).

(7)

Previously filed. Incorporated herein by reference from the exhibits filed with Post-Effective Amendment No. 53 to the Registration Statement on Form N-1A as filed with the SEC on July 28, 2017 (Accession Number 0000812195-17-000014).

(8)

Previously filed. Incorporated herein by reference from the exhibits filed with Post-Effective Amendment No. 61 to the Registration Statement on Form N-1A as filed with the SEC on April 28, 2021 (Accession Number 0001193125-21-136646).

(9)

Previously filed. Incorporated herein by reference from the exhibits filed with Post-Effective Amendment No. 62 to the Registration Statement on Form N-1A as filed with the SEC on April 27, 2022 (Accession Number 0001193125-22-123631).

(10)

Previously filed. Incorporated herein by reference from the exhibits filed with Post-Effective Amendment No. 63 to the Registration Statement on Form N-1A as filed with the SEC on April 26, 2023 (Accession Number 0001193125-23-117873).

(11)

Filed herewith.

Item 29. Persons Controlled by or Under Common Control with the Fund

None.

Item 30. Indemnification

Except for the Amended and Restated Agreement and Declaration of Trust (the "Declaration"), establishing the Fund as a statutory trust under Delaware law, there is no contract, arrangement or statute under which any Trustee, officer, underwriter or affiliated person of the Fund is insured or indemnified. The Declaration provides that every person who is, or has been, a Trustee or an officer, employee or agent of the Fund shall be indemnified by the Fund or the appropriate Fund series to the fullest extent permitted by law against liability and against all expenses reasonably incurred or paid by him in connection with any claim, action, suit or proceeding in which he becomes involved as a party or otherwise by virtue of his being or having been a Trustee, officer, employee or agent and against amounts paid or incurred by him in the settlement thereof. Insofar as indemnification for liability arising under the Securities Act

of 1933, as amended (the "1933 Act"), may be available to Trustees, officers and controlling persons of the Fund pursuant to the foregoing provisions, or otherwise, the Fund has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the 1933 Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Fund of expenses incurred or paid by a Trustee, officer or controlling person of the Fund in the successful defense of any action, suit or proceeding) is asserted by such Trustee, officer or controlling person in connection with the securities being registered, the Fund will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the 1933 Act and will be governed by the final adjudication of such issue.

Item 31. Business and Other Connections of Investment Adviser

Amundi Asset Management US, Inc. ("Amundi US") is a registered investment adviser under the Investment Advisers Act of 1940, as amended, and is an indirect, wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi Holdings US, Inc. Amundi US manages investment companies, pension and profit sharing plans, trusts, estates or charitable organizations and other corporations or business entities. Prior to January 1, 2021, Amundi US was known as Amundi Pioneer Asset Management, Inc.

To the knowledge of the Trust, none of Amundi US's directors or executive officers is or has been during their employment with Amundi US engaged in any other business, profession, vocation or employment of a substantial nature for the past two fiscal years. Certain directors and officers, however, may hold or may have held various positions with, and engage or have engaged in business for, the investment companies that Amundi US manages and/or other Amundi subsidiaries.

Item 32. Principal Underwriters

(a)

Amundi Distributor US, Inc. (prior to January 1, 2021, known as Amundi Pioneer Distributor, Inc.) acts as principal underwriter for the following investment companies:

Pioneer Asset Allocation Trust

Pioneer Bond Fund
Pioneer Equity Income Fund
Pioneer Fund
Pioneer High Yield Fund
Pioneer ILS Interval Fund
Pioneer Mid Cap Value Fund
Pioneer Money Market Trust
Pioneer Series Trust II
Pioneer Series Trust III
Pioneer Series Trust IV
Pioneer Series Trust V
Pioneer Series Trust VI
Pioneer Series Trust VII
Pioneer Series Trust VIII
Pioneer Series Trust X
Pioneer Series Trust XI
Pioneer Series Trust XII
Pioneer Series Trust XIV
Pioneer Short Term Income Fund
Pioneer Variable Contracts Trust

Amundi Distributor US, Inc. acts as placement agent for Pioneer Core Trust I.

(b)

Directors and executive officers of Amundi Distributor US, Inc.:

Name	Positions and Offices with Underwriter	Positions and Offices with Fund
Patrice Blanc	Director, Executive Vice President and Chief Operating Officer, Americas	None
Lisa M. Jones	Director, Chairman, President and Chief Executive Officer	President and Trustee
Jason C. Xanthakis	Director, Senior Managing Director and Head of Global Intermediary Distribution	None
Tracy L. Connelly	Managing Director and Chief Administration Officer, US, Intermediary Distribution	None
Gregg M. Dooling	Senior Managing Director and Chief Financial Officer	None
John D. Johnson	Managing Director and General Counsel	None
John M. Malone	Managing Director and Chief Compliance Officer	Chief Compliance Officer
Patrick D. Grecco	Senior Vice President and Deputy Financial Officer & Corporate Treasurer	None

The principal business address of each of these individuals, except John D. Johnson, is 60 State Street, Boston, Massachusetts 02109-1820. The principal business address of John D. Johnson is 280 South Mangum Street, Durham, North Carolina 27701.

(c)

Not applicable.

Item 33. Location of Accounts and Records

The accounts, books, and other documents required to be maintained by Section 31(a) of the Investment Company Act of 1940, as amended, and the rules promulgated thereunder are maintained at the following offices:

(a)

Registrant:
60 State Street

Boston, Massachusetts 02109

(b)

Investment adviser and administrator:
Amundi Asset Management US, Inc.
60 State Street
Boston, Massachusetts 02109

(c)

Principal underwriter:
Amundi Distributor US, Inc.
60 State Street
Boston, Massachusetts 02109

(d)

Custodian and sub-administrator:
The Bank of New York Mellon
225 Liberty Street
New York, New York 10286

(e)

Shareholder servicing and transfer agent:
BNY Mellon Investment Servicing (US) Inc.
Attn: 534427
500 Ross Street, 154-0520
Pittsburgh, Pennsylvania 15282

Item 34. Management Services

Not applicable.

Item 35. Undertakings

Not applicable.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Fund certifies that it meets all of the requirements for effectiveness of this registration statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment No. 64 to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Boston and The Commonwealth of Massachusetts on the 25thday of April, 2024.

PIONEER MONEY MARKET TRUST

By: /s/ Lisa M. Jones

Lisa M. Jones
President and Trustee

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed below by the following persons in the capacities indicated below on April 25, 2024:

Signature	Title	Date
/s/ Lisa M. Jones Lisa M. Jones	President (Principal Executive Officer) and Trustee
/s/ Anthony J. Koenig, Jr. Anthony J. Koenig, Jr.	Treasurer (Principal Financial and Accounting Officer)
John E. Baumgardner, Jr.* John E. Baumgardner, Jr.	Trustee
Diane Durnin* Diane Durnin	Trustee
Benjamin M. Friedman* Benjamin M. Friedman	Trustee
Craig C. MacKay* Craig C. MacKay	Trustee
Lorraine H. Monchak* Lorraine H. Monchak	Trustee
Thomas J. Perna* Thomas J. Perna	Chairman of the Board and Trustee
Fred J. Ricciardi* Fred J. Ricciardi	Trustee
*By: /s/ Lisa M. Jones Lisa M. Jones Attorney-In-Fact		April 25, 2024

EXHIBIT INDEX

Exhibit Number	Document Title
(j)	Consent of Independent Registered Public Accounting Firm
(p)	Code of Ethics of the Pioneer Funds, Amundi Distributor US, Inc., and Amundi Asset Management US, Inc. (February 2024)

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