Form 4 for AMTM Amentum Holdings, Inc.
Accepted 2026-02-18 00:00:00 ET · period of report 2026-02-17 · accession 0001628280-26-009269 · 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 | 2026-02-18 | 2026-02-17 | AMTM | St. Mary Michele T | CLO, GC | M - OptEx | — | +7,080 | 29.4K | +32% | — |
| D | 2026-02-18 | 2026-02-17 | AMTM | St. Mary Michele T | CLO, GC | F - Tax | $30.05 | -2,308 | 27.0K | -8% | -$69.4K |
| D | 2026-02-18 | 2026-02-17 | AMTM | St. Mary Michele T | CLO, GC | M - OptEx | $0.00 | -7,080 | 14.2K | -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 | 2026-02-17 | M | A | 7,080 | — | 29,351 | D | — | — | (F1) Represents distribution of AMTM common stock upon vesting of restricted stock units. |
| 2 | Common | Common Stock | 2026-02-17 | F | D | 2,308 | $30.05 | 27,043 | 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 | 2026-02-17 | M | D | 7,080 | $0.00 | 14,162 | D | — · — to — | 7,080 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 February 17, 2026. |