John C. Vollmer - 06 Feb 2026 Form 4 Insider Report for Amentum Holdings, Inc. (AMTM)

Role
Director
Signature
/s/ Indira Lall, Attorney-in-fact
Issuer symbol
AMTM
Transactions as of
06 Feb 2026
Net transactions value
$0
Form type
4
Filing time
10 Feb 2026, 16:05:59 UTC
Previous filing
10 Apr 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Vollmer John C. Director C/O AMENTUM HOLDINGS, INC., 4800 WESTFIELDS BOULEVARD, SUITE 400, CHANTILLY /s/ Indira Lall, Attorney-in-fact 10 Feb 2026 0001723342

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMTM Common Stock Options Exercise +11,564 +2.8% 424,780 06 Feb 2026 Direct F1, F2
transaction AMTM Common Stock Award $0 +5,062 +1.2% $0.000000 429,842 06 Feb 2026 Direct F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AMTM Restricted Stock Units Options Exercise $0 -11,564 -100% $0.000000 0 06 Feb 2026 Common Stock 11,564 Direct F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents distribution of AMTM common stock upon vesting of restricted stock units.
F2 Reflects a non-reportable transaction for shares transferred from the pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration at the time of the transaction.
F3 The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.
F4 Each restricted stock unit represents a contingent right to receive one share of AMTM common stock.
F5 The restricted stock units awarded vested on February 6, 2026.