Form 4 for AMTM Amentum Holdings, Inc.
Accepted 2025-11-10 00:00:00 ET · period of report 2025-11-06 · accession 0001628280-25-051106 · 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 | 2025-11-10 | 2025-11-06 | AMTM | Arnette Stephen A | COO | M - OptEx | — | +12.7K | 34.7K | +58% | — |
| D | 2025-11-10 | 2025-11-06 | AMTM | Arnette Stephen A | COO | F - Tax | $21.79 | -3,093 | 31.6K | -9% | -$67.4K |
| D | 2025-11-10 | 2025-11-06 | AMTM | Arnette Stephen A | COO | M - OptEx | $0.00 | -12.7K | 25.4K | -33% | $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 | 2025-11-06 | M | A | 12,701 | — | 34,721 | D | — | — | (F1) Represents distribution of AMTM common stock upon vesting of restricted stock units. |
| 2 | Common | Common Stock | 2025-11-06 | F | D | 3,093 | $21.79 | 31,628 | D | — | — | (F2) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units. |
| 3 | Derivative | Restricted Stock Units | 2025-11-06 | M | D | 12,701 | $0.00 | 25,404 | D | — · — to — | 12,701 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 November 6, 2025. |