Supplemental Prospectus (Form 424B3)

PROSPECTUS SUPPLEMENT NO. 9 (to prospectus dated May 14, 2021)

Filed pursuant to Rule 424(b)(3) Registration No. 333-255842

AST SPACEMOBILE, INC.

28,750,000 SHARES OF CLASS A COMMON STOCK

6,100,000 WARRANTS TO PURCHASE SHARES OF CLASS A COMMON STOCK

17,600,000 SHARES OF CLASS A COMMON STOCK UNDERLYING WARRANTS

This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated May 14, 2021 (the "Prospectus"), related to (i) the offer and sale, from time to time, by the selling stockholders identified in the Prospectus, or their permitted transferees, of (a) an aggregate of 28,750,000 shares of Class A common stock, par value $0.0001 per share (the "Class A Common Stock"), of AST SpaceMobile, Inc., a Delaware corporation, and (b) 6,100,000 warrants to purchase Class A Common Stock at an exercise price of $11.50 per share (the "private placement warrants") and (ii) the issuance by us of up to 17,600,000 shares of Class A Common Stock upon the exercise of outstanding public warrants (the "public warrants") and private placement warrants (collectively, the "warrants"), with the information contained in our Current Report on Form 8-K, filed with the Securities and Exchange Commission ("SEC") on January 19, 2022 (the "Current Report"). Accordingly, we have attached the Current Report to this prospectus supplement.

This prospectus supplement updates and supplements the information in the Prospectus and is not complete without, and may not be delivered or utilized except in combination with, the Prospectus, including any amendments or supplements thereto. This prospectus supplement should be read in conjunction with the Prospectus and if there is any inconsistency between the information in the Prospectus and this prospectus supplement, you should rely on the information in this prospectus supplement.

Our shares of Class A Common Stock are listed on The Nasdaq Capital Market LLC ("Nasdaq") under the symbol "ASTS." On January 19, 2022, the closing sale price per share of our Class A Common Stock was $6.06. Our public warrants are listed on The Nasdaq Capital Market under the symbol "ASTSW." On January 19, 2022, the closing sale price per warrant of our public warrants was $2.24.

Investing in shares of our Class A Common Stock or warrants involves risks that are described in the "Risk Factors" section beginning on page 5 of the Prospectus.

Neither the SEC nor any state securities commission has approved or disapproved of the securities to be issued under the Prospectus or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is January 19, 2022.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): January 18, 2022

AST SpaceMobile, Inc.

(Exact name of registrant as specified in its charter)

Delaware		001-39040		84-2027232
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

Midland Intl. Air & Space Port 2901 Enterprise Lane Midland, Texas		79706
(Address of principal executive offices)		(Zip Code)

(432)276-3966

Registrant's telephone number, including area code

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Class A common stock, par value $0.0001 per share		ASTS		The Nasdaq Stock Market LLC
Warrants exercisable for one share of Class A common stock at an exercise price of $11.50		ASTSW		The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01 Other Events.

As previously reported, in July 2021, AST & Science LLC ("AST & Science"), a subsidiary of AST SpaceMobile, Inc., entered in an agreement with a launch service provider (the "Launch Agreement") for its BlueWalker 3 test satellite and, in November 2021, delivered a rebooking notice and paid a rebooking fee, seeking to rebook the launch window to Summer 2022 to provide additional time for testing and final launch preparation. The launch provider now has confirmed a launch window in Summer 2022, although the actual timing of such launch is subject to numerous factors.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: January 19, 2022

	AST SPACEMOBILE, INC.
	By:	/s/ Thomas Severson
	Name:	Thomas Severson
	Title:	Chief Financial Officer

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