AST SpaceMobile (ASTS) CFO RSU vesting leads to tax share withholding

Rhea-AI Filing Summary

AST SpaceMobile, Inc. director and CFO/CLO Andrew Martin Johnson reported a routine tax-withholding transaction tied to equity compensation. Restricted Stock Units representing 41,666 shares of Class A Common Stock vested, and 16,377 shares were withheld to cover tax liabilities at $113.41 per share. This resulted in a net 25,289 shares vesting to him, and he now directly holds 549,428 Class A shares. The event reflects compensation-related tax settlement, not an open-market purchase or 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	16,377	$113.41	$1.86M

Holdings After Transaction: Class A Common Stock — 549,428 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares withheld for taxes: 16,377 shares Reference price per share: $113.41 per share RSUs vested: 41,666 shares +2 more

5 metrics

Shares withheld for taxes 16,377 shares Tax-withholding disposition on RSU vesting

Reference price per share $113.41 per share Value used for tax-withholding disposition

RSUs vested 41,666 shares Restricted Stock Units that vested

Net vested shares delivered 25,289 shares RSU shares remaining after tax withholding

Shares owned after transaction 549,428 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 41,666 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 41,666 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" for 16,377.0000 shares of Class A Common Stock"

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" and RSUs representing 41,666 shares of 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.

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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)
05/30/2026

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	05/30/2026		F		16,377(1)	D	$113.41	549,428	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 41,666 shares of Class A Common Stock issued in accordance with Rule 16b-3, resulting in a net vested number of 25,289 shares.

	/s/ Andrew M. Johnson	06/02/2026
	** 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 insider transaction did AST SpaceMobile (ASTS) report for Andrew Martin Johnson?

AST SpaceMobile reported that Andrew Martin Johnson settled taxes on vested RSUs by share withholding. RSUs for 41,666 Class A shares vested, and 16,377 shares were withheld to cover tax liabilities, leaving a net 25,289 shares delivered to him as equity compensation.

How many ASTS shares were withheld for taxes in this Form 4 filing?

The filing shows 16,377 shares of AST SpaceMobile Class A Common Stock were withheld to pay tax liabilities. This withholding was tied to the vesting of Restricted Stock Units and used a reference price of $113.41 per share for the tax-withholding disposition.

How many AST SpaceMobile RSUs vested for Andrew Martin Johnson?

Restricted Stock Units representing 41,666 shares of AST SpaceMobile Class A Common Stock vested for Andrew Martin Johnson. After 16,377 shares were withheld for taxes, the net number of vested shares actually delivered to him totaled 25,289 Class A shares under his compensation plan.

How many ASTS shares does Andrew Martin Johnson own after this transaction?

After the tax-withholding disposition, Andrew Martin Johnson directly holds 549,428 shares of AST SpaceMobile Class A Common Stock. This figure comes from the post-transaction ownership line in the Form 4 and reflects his direct equity position following the RSU vesting event.

Was the ASTS insider transaction an open-market sale of shares?

No. The filing describes a tax-withholding disposition, not an open-market sale. Shares were withheld by the company to pay tax liabilities when RSUs vested, meaning no discretionary sale into the market occurred as part of this specific transaction.

What does tax-withholding disposition mean in the ASTS Form 4?

Tax-withholding disposition means some shares from vested equity awards are retained to cover tax obligations. In this case, 16,377 AST SpaceMobile shares from vested RSUs were withheld, satisfying Johnson’s tax liability instead of him paying cash, a common equity compensation mechanism.