Amentum (AMTM) director Sandra Rowland reports RSU vesting and holds 20,073 shares

Rhea-AI Filing Summary

Amentum Holdings director Sandra E. Rowland reported stock awards tied to restricted stock units. On February 6, 2026, 11,564 restricted stock units converted into the same number of common shares at $0 per share as they vested. She also received a new grant of 5,062 common shares, also at $0 per share, which are described as restricted stock units that vest on the date of the issuer’s next annual stockholder meeting. After these transactions, she directly owned 20,073 shares of Amentum Holdings common stock.

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^*

Rowland Sandra E.

(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)	15,011	D
Common Stock	02/06/2026		A		5,062(2)	A	$0	20,073	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	(3)	02/06/2026		M			11,564	(4)	(4)	Common Stock	11,564	$0	0	D

Explanation of Responses:

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

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

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

4. 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 transaction did Sandra E. Rowland report at Amentum Holdings (AMTM)?

Sandra E. Rowland reported vesting and related issuance of Amentum common stock. 11,564 restricted stock units converted into 11,564 common shares at $0 per share, and she received an additional 5,062 common shares, bringing her direct ownership to 20,073 shares after the transactions.

How many Amentum (AMTM) shares does Sandra E. Rowland own after this Form 4?

After the reported transactions, Sandra E. Rowland directly owns 20,073 Amentum common shares. This reflects 11,564 shares issued upon restricted stock unit vesting and a separate 5,062-share award, all reported as directly held following the February 6, 2026 transactions.

Were any of Sandra E. Rowland’s Amentum (AMTM) share transactions sales for cash?

The reported transactions were not sales for cash. Restricted stock units converted into 11,564 common shares at a $0 price, and 5,062 additional common shares were awarded at $0, indicating stock-based compensation rather than open-market selling activity or cash purchases.

What do the restricted stock units in this Amentum (AMTM) Form 4 represent?

Each restricted stock unit represents a contingent right to receive one Amentum common share. In this filing, 11,564 units vested and became common stock, and another award of 5,062 units is scheduled to vest on the date of the issuer’s next annual stockholder meeting.

When did Sandra E. Rowland’s Amentum (AMTM) restricted stock units vest?

The filing states that the restricted stock units awarded vested on February 6, 2026. On that date, 11,564 restricted stock units were distributed as the same number of Amentum common shares, all at a stated price of $0 per share as part of equity compensation.

What is the role of Sandra E. Rowland at Amentum Holdings (AMTM)?

Sandra E. Rowland is identified as a director of Amentum Holdings. The Form 4 shows equity-based compensation activity typical for board members, including vesting of restricted stock units and a new common stock award associated with service on the company’s board of directors.