Sec Form 4 Filing - Avellan Abel Antonio @ AST SpaceMobile, Inc. - 2026-03-31

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Avellan Abel Antonio 2. Issuer Name and Ticker or Trading Symbol AST SpaceMobile, Inc. [ ASTS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) C/O AST SPACEMOBILE, INC., MIDLAND AIR &, SPACE PORT, 2901 ENTERPRISE LANE 3. Date of Earliest Transaction (MM/DD/YY) 03/31/2026 (Street) MIDLAND, TX79706 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class C Common Stock 78,163,078 D Class A Common Stock 03/31/2026 F 22,490 ( 1 ) D $ 82.87 78,574,963 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Common Units ( 2 ) ( 3 ) ( 2 )( 3 ) ( 2 )( 3 ) Class A Common Stock 78,163,078 78,163,078 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Avellan Abel Antonio C/O AST SPACEMOBILE, INC., MIDLAND AIR & SPACE PORT, 2901 ENTERPRISE LANE MIDLAND, TX79706 X Chief Executive Officer Signatures /s/ Abel Avellan 04/02/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents a payment of tax liability via forfeiture by withholding securities incident to the vesting of Restricted Stock Units representing 61,458 shares of Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number of 38,968 shares. The Reporting Person did not sell any shares. ( 2 )The securities reported in this line item represent AST Common Units. At any time on or after April 6, 2022, these AST Common Units may be redeemed by the Reporting Person in exchange for shares of Class A common stock of the Issuer on a one-to-one basis. When a holder of Class C common stock of the Issuer exchanges AST Common Units for shares of Class A common stock of the Issuer, a number of shares of Class C common stock of the Issuer equal to the number of such AST Common Units will be immediately retired by the Issuer and will no longer be outstanding. The AST Common Units do not expire. ( 3 )In connection with the closing of the business combination between New Providence Acquisition Corp. and AST & Science, LLC ("AST") on April 6, 2021, each existing common unit previously issued by AST was reclassified and reissued by AST into new Common Units on a 1-to-14.50149869 basis. In addition, each equityholder of Common Units received an equivalent number of Class B Common Stock or Class C Common Stock of the Issuer, as applicable.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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