Amentum Holdings (AMTM) director receives vested shares and stock grant

Rhea-AI Filing Summary

Amentum Holdings director Brooks Vincent K reported stock-based compensation activity. On February 6, 2026, 11,564 restricted stock units converted into the same number of Amentum common shares at $0 per share upon vesting. A separate award of 5,062 common shares at $0 was also acquired as equity compensation. Following these transactions, Brooks directly owned 27,462 shares of Amentum common stock, reflecting routine director compensation rather than an open‑market purchase or sale.

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

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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^*

Brooks Vincent K

(Last) (First) (Middle)

C/O AMENTUM HOLDINGS, INC.

4800 WESTFIELDS BOULEVARD, SUITE 400

(Street)

CHANTILLY VA 20151

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Amentum Holdings, Inc. [ AMTM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
02/06/2026

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

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

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

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
Common Stock	02/06/2026		M		11,564	A	(1)	22,400(2)	D
Common Stock	02/06/2026		A		5,062(3)	A	$0	27,462	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
Restricted Stock Units	(4)	02/06/2026		M			11,564	(5)	(5)	Common Stock	11,564	$0	0	D

Explanation of Responses:

1. Represents distribution of AMTM common stock upon vesting of restricted stock units.

2. Reflects a non-reportable transaction for shares transferred from the pro-rata distribution in-kind by Jacobs Solutions Inc. to its shareholders for no consideration on May 30, 2025.

3. The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

4. Each restricted stock unit represents a contingent right to receive one share of AMTM common stock.

5. The restricted stock units awarded vested on February 6, 2026.

Remarks:

	/s/ Indira Lall, Attorney-in-fact	02/10/2026
	** 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.

FAQ

What insider activity did Amentum (AMTM) disclose for Brooks Vincent K?

Amentum disclosed that director Brooks Vincent K received stock-based compensation on February 6, 2026. 11,564 restricted stock units vested into common shares, and he also acquired 5,062 additional common shares, all at $0 per share.

Did Brooks Vincent K buy or sell Amentum (AMTM) shares on the open market?

The filing shows no open-market purchases or sales. Instead, 11,564 shares came from vested restricted stock units and 5,062 shares were granted as equity compensation, all reported at $0 per share to the director.

How many Amentum (AMTM) shares does Brooks Vincent K own after this Form 4?

After the reported transactions, director Brooks Vincent K directly owns 27,462 shares of Amentum common stock. This total reflects shares received from vested restricted stock units and a new share grant reported in the filing.

What happened to Brooks Vincent K’s restricted stock units in Amentum (AMTM)?

11,564 restricted stock units fully vested on February 6, 2026 and were distributed as the same number of Amentum common shares. After this conversion, the filing shows zero restricted stock units remaining beneficially owned by the director.

At what price were the Amentum (AMTM) shares and units reported in this Form 4?

Both the 11,564 shares from vested restricted stock units and the additional 5,062 common shares were reported at a price of $0 per share, indicating these were equity compensation awards rather than cash purchases.

What do the footnotes explain about Amentum (AMTM) restricted stock units?

The footnotes state that each restricted stock unit represents one Amentum common share, that units vest on the date of the next annual stockholder meeting, and that the units reported here vested on February 6, 2026 and were distributed as common stock.