Amentum director granted 5,062 restricted shares

Amentum Holdings, Inc. director Christopher M.T.

Rhea-AI Filing Summary

Amentum Holdings, Inc. director Christopher M.T. Thompson reported an equity award tied to the company’s common stock. On 02/06/2026, he acquired 5,062 shares of common stock at a price of $0, reflecting a grant of restricted stock units that will vest on the date of the next annual meeting of stockholders.

After the award, Thompson directly beneficially owns 5,062 common shares. The filing also notes indirect beneficial ownership of 14,000 common shares held by his spouse and 10,000 common shares held by a trust.

Insider Trade Summary

Grant/Award: 5,062 shares

Grant/Award 3 txns

Insider Thompson Christopher M.T.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	5,062	$0.00	$0.00
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 5,062 shares (Direct); Common Stock — 14,000 shares (Indirect, By Spouse); Common Stock — 10,000 shares (Indirect, By Trust)

Footnotes (1)

1. F1. The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

FAQ

What did Amentum Holdings (AMTM) director Christopher Thompson report on this Form 4?

Christopher M.T. Thompson reported receiving 5,062 Amentum Holdings common shares on 02/06/2026 at a price of $0 per share. The award represents restricted stock units that will vest on the date of the company’s next annual meeting of stockholders.

How many Amentum Holdings (AMTM) shares does Christopher Thompson now own directly and indirectly?

Following the reported transaction, Christopher Thompson directly beneficially owns 5,062 Amentum Holdings common shares. The filing also lists 14,000 common shares indirectly owned through his spouse and 10,000 common shares indirectly owned through a trust associated with him.

What is the nature of the equity award reported by Amentum Holdings (AMTM) director Thompson?

The equity award consists of restricted stock units linked to 5,062 Amentum Holdings common shares. According to the filing, these restricted stock units will fully vest on the date of the next annual meeting of stockholders of Amentum Holdings, assuming service conditions are met.

Was there any cash paid for the Amentum Holdings (AMTM) shares acquired by Christopher Thompson?

No cash was paid for the 5,062 Amentum Holdings common shares reported as acquired. The Form 4 lists a transaction price of $0 per share, indicating the shares were received as an equity grant rather than purchased in an open-market transaction.

What roles and relationships does Christopher Thompson have with Amentum Holdings (AMTM)?

Christopher M.T. Thompson is identified as a director of Amentum Holdings, Inc. on the Form 4. He is not marked as an officer or 10% owner, and the filing is made as a single reporting person under the SEC’s Section 16 ownership reporting rules.

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Accepted by SEC EDGAR 02/10/2026 - 04:07 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^*

Thompson Christopher M.T.

(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		A		5,062(1)	A	$0	5,062	D
Common Stock								14,000	I	By Spouse
Common Stock								10,000	I	By Trust

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

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.