4//SEC Filing
Mullen Sean Thomas 4
Accession 0001628280-25-058286
CIK 0002011286other
Filed
Dec 18, 7:00 PM ET
Accepted
Dec 19, 4:19 PM ET
Size
8.6 KB
Accession
0001628280-25-058286
Insider Transaction Report
Form 4
Mullen Sean Thomas
Chief Growth Officer
Transactions
- Exercise/Conversion
Common Stock
2025-12-17+9,298→ 30,332 total - Tax Payment
Common Stock
2025-12-17$28.67/sh−4,194$120,242→ 26,138 total - Exercise/Conversion
Restricted Stock Units
2025-12-17−9,298→ 0 total→ Common Stock (9,298 underlying)
Footnotes (4)
- [F1]Represents distribution of AMTM common stock upon vesting of restricted stock units.
- [F2]Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.
- [F3]Each restricted stock unit represents a contingent right to receive one share of AMTM common stock.
- [F4]The restricted stock units awarded vested on December 17, 2025.
Documents
Issuer
Amentum Holdings, Inc.
CIK 0002011286
Entity typeother
Related Parties
1- filerCIK 0002034388
Filing Metadata
- Form type
- 4
- Filed
- Dec 18, 7:00 PM ET
- Accepted
- Dec 19, 4:19 PM ET
- Size
- 8.6 KB