Form 4 for AMTM Amentum Holdings, Inc.
Accepted 2025-11-19 00:00:00 ET · period of report 2025-11-17 · accession 0001628280-25-053268 · 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 | 2025-11-19 | 2025-11-17 | AMTM | Arnette Stephen A | COO | F - Tax | $21.49 | -287 | 47.0K | -0.6% | -$6,168 |
| D | 2025-11-19 | 2025-11-17 | AMTM | Arnette Stephen A | COO | M - OptEx | — | +1,178 | 47.2K | +3% | — |
| D | 2025-11-19 | 2025-11-17 | AMTM | Arnette Stephen A | COO | A - Grant | $0.00 | +46.8K | 93.7K | +100% | $0 |
| D | 2025-11-19 | 2025-11-17 | AMTM | Arnette Stephen A | COO | M - OptEx | $0.00 | -1,178 | 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 | 2025-11-17 | F | D | 287 | $21.49 | 46,956 | D | — | — | (F2) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units. |
| 2 | Common | Common Stock | 2025-11-17 | M | A | 1,178 | — | 47,243 | D | — | — | (F1) Represents distribution of AMTM common stock upon vesting of restricted stock units. |
| 3 | Common | Common Stock | 2025-11-17 | A | A | 46,769 | $0.00 | 93,725 | D | — | — | (F3) One-third of the restricted stock units shall vest on each of the first, second and third anniversaries of November 17, 2025. |
| 4 | Derivative | Restricted Stock Units | 2025-11-17 | M | D | 1,178 | $0.00 | 0 | D | — · — to — | 1,178 Common Stock | (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. |