Amentum (AMTM) director receives 5,062 restricted stock units

Rhea-AI Filing Summary

Amentum Holdings director Susan Leslie Ireland reported a stock grant from the company. On February 6, 2026, she acquired 5,062 shares of common stock at a stated price of $0, bringing her directly held beneficial ownership to 8,509 shares.

According to the footnote, these shares represent restricted stock units that will vest on the date of Amentum’s next annual meeting of stockholders, tying the award to continued board service until that meeting.

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^*

IRELAND SUSAN LESLIE

(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	8,509	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. 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).
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FAQ

What does the Amentum (AMTM) Form 4 filed for Susan Leslie Ireland report?

The Form 4 reports that director Susan Leslie Ireland received 5,062 shares of Amentum common stock on February 6, 2026. These were granted at a stated price of $0, increasing her directly held beneficial ownership to 8,509 shares after the transaction.

How many Amentum (AMTM) shares does director Susan Leslie Ireland now beneficially own?

After the reported transaction, Susan Leslie Ireland beneficially owns 8,509 shares of Amentum common stock directly. This reflects the addition of 5,062 granted shares on February 6, 2026, as shown in the Form 4’s non-derivative securities table.

What type of equity did Susan Leslie Ireland receive from Amentum (AMTM) on February 6, 2026?

She received restricted stock units linked to Amentum common stock. The Form 4 shows an acquisition of 5,062 shares at a stated price of $0, with a footnote clarifying that the award consists of restricted stock units subject to vesting.

When will Susan Leslie Ireland’s restricted stock units from Amentum (AMTM) vest?

The restricted stock units will vest on the date of Amentum’s next annual meeting of stockholders. This means the 5,062 units granted on February 6, 2026 become fully earned at that meeting, assuming the vesting condition tied to that date is satisfied.

Was the Amentum (AMTM) insider transaction by Susan Leslie Ireland a purchase or a grant?

The filing shows an acquisition coded “A” at a price of $0, indicating a grant rather than an open-market purchase. The accompanying footnote explains that the award consists of restricted stock units that vest at the next annual meeting of stockholders.