Material Event (Form 8-K)

On September 21, 2021, Eargo, Inc. (the "Company") was informed that it is the target of a criminal investigation by the U.S. Department of Justice (the "DOJ") related to insurance reimbursement claims the Company has submitted on behalf of its customers covered by federal employee health plans. The Company is cooperating with the investigation. In addition, the Company intends to work with the government with the objective of validating the process to support any future claims that the Company may submit for reimbursement.

As previously disclosed, the Company has been the subject of an ongoing claims audit by an insurance company that is the Company's largest third-party payor. The Company has been informed by the insurance company that the DOJ is now the principal contact related to the subject matter of the audit.

In light of this information, the Company is withdrawing its financial guidance for the fiscal year ending December 31, 2021.

Forward-Looking Statements

This Current Report on Form 8-Kcontains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact contained in this report are forward-looking statements, including statements regarding the Company's cooperation with the DOJ investigation and the objective of validating the process to support any future claims that the Company may submit for reimbursement. Forward-looking statements are not guarantees of future performance and are subject to risks, uncertainties and assumptions that could cause actual results and events to differ materially from those anticipated, including, but not limited to, risks, uncertainties and assumptions related to: the outcomes of the DOJ investigation and third-party payor audits; potential related penalties, fines and criminal actions that may ensue as a result of the DOJ investigation, the third-party payor audits and/or any other action that may arise therefrom; recoupments of previous claims paid as a result of the DOJ investigation, the third-party payor audits and/or any other action that may arise therefrom; the impact of the DOJ investigation and third-party payor audits on the Company's business and results of operations; the Company's expectations concerning additional orders by existing customers; the Company's expectations regarding the potential market size and size of the potential consumer populations for its products and any future products, including the Company's ability to maintain or increase insurance coverage of Eargo hearing aids going forward; the Company's ability to release new hearing aids and the anticipated features of any such hearing aids; developments and projections relating to the Company's competitors and its industry, including competing products; the Company's ability to maintain its competitive technological advantages against new entrants in its industry; the pricing of the Company's hearing aids; the Company's expectations regarding the ability to make certain claims related to the performance of its hearing aids relative to competitive products; the Company's expectations with regard to changes in the regulatory landscape for hearing aid devices, including the implementation of the pending over-the-counterhearing aid pathway regulatory framework; and the Company's estimates regarding the COVID-19pandemic, including but not limited to, its duration and its impact on the Company's business and results of operations. These and other risks are described in greater detail under the section titled "Risk Factors" contained in the Company's Annual Report on Form 10-K,Quarterly Reports on Form 10-Qand other filings with the U.S. Securities and Exchange Commission. Any forward-looking statements in this Current Report on Form 8-Kare made pursuant to the Private Securities Litigation Reform Act of 1995, as amended, are based on current expectations, forecasts and assumptions, and speak only as of the date of this report. Except as required by law, the Company undertakes no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.