Arnette Stephen A 4
4 · Amentum Holdings, Inc. · Filed Nov 19, 2025
Insider Transaction Report
Form 4
Arnette Stephen A
Chief Operating Officer
Transactions
- Exercise/Conversion
Common Stock
2025-11-17+1,178→ 47,243 total - Award
Common Stock
2025-11-17+46,769→ 93,725 total - Tax Payment
Common Stock
2025-11-17$21.49/sh−287$6,168→ 46,956 total - Exercise/Conversion
Restricted Stock Units
2025-11-17−1,178→ 0 total→ Common Stock (1,178 underlying)
Footnotes (5)
- [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]One-third of the restricted stock units shall vest on each of the first, second and third anniversaries of November 17, 2025.
- [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 November 17, 2025.