AST SpaceMobile (ASTS) CFO withholds vested shares to cover taxes

Rhea-AI Filing Summary

AST SpaceMobile, Inc. director and CFO/CLO Andrew Martin Johnson reported a tax-related share disposition tied to equity compensation. On the vesting of Restricted Stock Units representing 33,333 shares of Class A Common Stock, 12,167 shares were withheld at $82.87 per share to cover tax liabilities, resulting in a net vesting of 21,166 shares. After this withholding, he directly holds 600,318 shares of Class A Common Stock.

This event reflects routine tax withholding on stock-based compensation rather than an open-market sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Johnson Andrew Martin

Role CFO and CLO

Type	Security	Shares	Price	Value
Tax Withholding	Class A Common Stock	12,167	$82.87	$1.01M

Holdings After Transaction: Class A Common Stock — 600,318 shares (Direct)

Footnotes (1)

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Key Figures

Shares withheld for taxes: 12,167 shares Withholding price per share: $82.87 per share RSUs vested: 33,333 shares +2 more

5 metrics

Shares withheld for taxes 12,167 shares Tax-withholding disposition on RSU vesting

Withholding price per share $82.87 per share Value used for tax-withholding disposition

RSUs vested 33,333 shares Restricted Stock Units representing Class A Common Stock

Net vested shares 21,166 shares After withholding 12,167 shares for taxes

Shares held after transaction 600,318 shares Direct Class A Common Stock holdings post-transaction

Key Terms

Restricted Stock Units, Rule 16b-3, tax-withholding disposition, Class A Common Stock

4 terms

Restricted Stock Units financial

"Represents a payment of tax liability by withholding securities incident to the vesting of Restricted Stock Units representing 33,333 shares"

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.

Rule 16b-3 regulatory

"Restricted Stock Units representing 33,333 shares of Class A Common Stock issued in accordance with Rule 16b-3"

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.

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Class A Common Stock financial

"security_title": "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

Form 4 Insider Transactions: What Each Field Means →

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)
03/31/2026

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	03/31/2026		F		12,167(1)	D	$82.87	600,318	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 33,333 shares of Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number of 21,166 shares.

	/s/ Andrew M. Johnson	04/02/2026
	** 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)

FAQ

What did AST SpaceMobile (ASTS) disclose about Andrew Johnson’s recent share transaction?

AST SpaceMobile reported that director and CFO/CLO Andrew Martin Johnson had 12,167 Class A shares withheld at $82.87 each to cover taxes upon RSU vesting. This was a tax-withholding disposition, not an open-market sale, tied to equity compensation.

How many ASTS shares vested for Andrew Johnson and how many did he keep?

Restricted Stock Units representing 33,333 AST SpaceMobile Class A shares vested for Andrew Johnson. To pay taxes, 12,167 shares were withheld, leaving a net vested amount of 21,166 shares added to his direct holdings as part of routine compensation.

How many AST SpaceMobile shares does Andrew Johnson hold after this Form 4 event?

Following the tax-withholding disposition, Andrew Martin Johnson directly holds 600,318 shares of AST SpaceMobile Class A Common Stock. This figure reflects his position after 12,167 shares were withheld to satisfy tax obligations linked to the vesting of equity awards.

Was Andrew Johnson’s ASTS Form 4 transaction an open-market sale of shares?

No. The Form 4 describes a tax-withholding disposition, not an open-market sale. AST SpaceMobile withheld 12,167 vested shares to satisfy Johnson’s tax liability on RSUs, a common mechanism for handling taxes on stock-based compensation awards.

What role did Restricted Stock Units play in Andrew Johnson’s ASTS share change?

The transaction stems from the vesting of Restricted Stock Units representing 33,333 AST SpaceMobile shares. Upon vesting, 12,167 shares were withheld to cover taxes, leaving 21,166 shares net vested to Andrew Johnson under Rule 16b-3 equity compensation provisions.