Form 4 for AMTM Amentum Holdings, Inc.
Accepted 2025-12-19 00:00:00 ET · period of report 2025-12-17 · accession 0001628280-25-058286 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-12-19 | 2025-12-17 | AMTM | Mullen Sean Thomas | Chief Growth Off | F - Tax | $28.67 | -4,194 | 26.1K | -14% | -$120.2K |
| D | 2025-12-19 | 2025-12-17 | AMTM | Mullen Sean Thomas | Chief Growth Off | M - OptEx | — | +9,298 | 30.3K | +44% | — |
| D | 2025-12-19 | 2025-12-17 | AMTM | Mullen Sean Thomas | Chief Growth Off | M - OptEx | $0.00 | -9,298 | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-12-17 | F | D | 4,194 | $28.67 | 26,138 | D | — | — | (F2) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units. |
| 2 | Common | Common Stock | 2025-12-17 | M | A | 9,298 | — | 30,332 | D | — | — | (F1) Represents distribution of AMTM common stock upon vesting of restricted stock units. |
| 3 | Derivative | Restricted Stock Units | 2025-12-17 | M | D | 9,298 | $0.00 | 0 | D | — · — to — | 9,298 Common Stock | (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. |