AST SpaceMobile (ASTS) CFO RSUs, PSUs vest with tax share withholding

Rhea-AI Filing Summary

AST SpaceMobile, Inc. (ASTS) reported that its CFO and CLO, Andrew Martin Johnson, had shares of Class A Common Stock withheld on August 15, 2026 to cover tax liabilities upon equity vesting. Two code F transactions disposed of a total of 22,135 shares at $70.98 per share through tax withholding, not open-market sales.

The first transaction related to the vesting of 25,000 Restricted Stock Units, with 9,838 shares withheld for taxes and a net vesting of 15,162 shares. The second related to vesting of 31,250 performance-based stock unit awards, with 12,297 shares withheld, resulting in a net vested amount of 18,953 shares of Class A Common Stock.

Insider Trade Summary

Net Seller: 22,135 shares

Net Sell 2 txns

Insider Johnson Andrew Martin

Role CFO and CLO

Type	Security	Shares	Price	Value
Tax Withholding	Class A Common Stock F1	9,838	$70.98	$698K
Tax Withholding	Class A Common Stock F2	12,297	$70.98	$873K

Holdings After Transaction: Class A Common Stock — 481,484 shares (Direct)

Footnotes (2)

1. F1. Represents a payment of tax liability by withholding securities incident to the vesting of Restricted Stock Units representing 25,000 shares of Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number of 15,162 shares.
2. F2. Represents a payment of tax liability by withholding securities incident to the vesting of performance-based stock unit awards ("PSUs") representing 31,250 shares of Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number of 18,953 shares.

Key Figures

RSUs vested: 25,000 shares RSU shares withheld for taxes: 9,838 shares Net RSU shares vested: 15,162 shares +5 more

8 metrics

RSUs vested 25,000 shares Restricted Stock Units representing Class A Common Stock that vested for the CFO and CLO

RSU shares withheld for taxes 9,838 shares Shares withheld to pay tax liability on RSU vesting, code F transaction

Net RSU shares vested 15,162 shares Net vested shares after tax withholding on RSU vesting

PSUs vested 31,250 shares Performance-based stock unit awards representing Class A Common Stock that vested

PSU shares withheld for taxes 12,297 shares Shares withheld to pay tax liability on PSU vesting, code F transaction

Net PSU shares vested 18,953 shares Net vested shares after tax withholding on PSU vesting

Tax withholding share price $70.98 per share Transaction price used for both tax-withholding dispositions on August 15, 2026

Total shares withheld for taxes 22,135 shares Combined shares withheld across both code F transactions for tax liabilities

Key Terms

Restricted Stock Units, performance-based stock unit awards ("PSUs"), Rule 16b-3

3 terms

Restricted Stock Units financial

"Represents a payment of tax liability by withholding securities incident to the vesting of Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

performance-based stock unit awards ("PSUs") financial

"withholding securities incident to the vesting of performance-based stock unit awards ("PSUs") representing 31,250 shares"

Rule 16b-3 regulatory

"Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number"

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

FAQ

What insider transactions did ASTS CFO Andrew Johnson report on August 15, 2026?

Andrew Johnson reported two code F transactions on August 15, 2026, where 22,135 shares of Class A Common Stock were withheld to pay tax liabilities arising from the vesting of RSUs and PSUs, rather than sold in the open market.

How many ASTS shares were withheld for taxes from Andrew Johnson’s RSU vesting?

From vesting of 25,000 Restricted Stock Units, 9,838 shares of AST SpaceMobile Class A Common Stock were withheld to pay tax liabilities, resulting in a net vested amount of 15,162 shares delivered to the insider.

What performance-based stock unit (PSU) vesting did ASTS disclose for Andrew Johnson?

AST SpaceMobile disclosed vesting of 31,250 performance-based stock unit awards (PSUs) for Andrew Johnson. To cover related tax liabilities, 12,297 shares were withheld, resulting in a net vested amount of 18,953 shares of Class A Common Stock.

Were the ASTS insider transactions by Andrew Johnson open-market sales?

No. Both transactions were reported under code F as payments of tax liability by withholding AST SpaceMobile Class A shares upon vesting of RSUs and PSUs, meaning the shares were not sold in open-market transactions.

At what price were Andrew Johnson’s ASTS shares withheld for tax payments?

The withheld AST SpaceMobile shares were valued at a transaction price of $70.98 per share. This price applies to both tax-withholding transactions covering RSU and PSU vestings on August 15, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/18/2026 - 06:00 PM Accepted by SEC EDGAR 08/18/2026 - 06:00 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Johnson Andrew Martin

(Last) (First) (Middle)

C/O AST SPACEMOBILE, INC., MIDLAND

AIR & SPACE PORT, 2901 ENTERPRISE LANE

(Street)

MIDLAND TEXAS 79706

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	CFO and CLO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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 A Common Stock	08/15/2026		F		9,838(1)	D	$70.98	493,781	D
Class A Common Stock	08/15/2026		F		12,297(2)	D	$70.98	481,484	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents a payment of tax liability by withholding securities incident to the vesting of Restricted Stock Units representing 25,000 shares of Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number of 15,162 shares.

2. Represents a payment of tax liability by withholding securities incident to the vesting of performance-based stock unit awards ("PSUs") representing 31,250 shares of Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number of 18,953 shares.

	/s/ Andrew M. Johnson	08/18/2026
	** Signature of Reporting Person	Date
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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)