Company filings profile · CIK 0002011286
Amentum Holdings, Inc. — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for Amentum Holdings, Inc. (AMTM): 5 filings in the last 90 days vs 9 in the prior 90 (filing-velocity cooling ↓ · 0.56×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Oct 3, 2026. Source-linked, daily-refreshed.
Material 8-K events — Amentum Holdings, Inc.
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Oct 2, 2026 | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Aug 10, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| May 11, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Apr 28, 2026 | Entry into a Material Agreement | ↗ |
| Feb 10, 2026 | Item 5.07 | ↗ |
| Feb 9, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Nov 24, 2025 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
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Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Oct 2, 2026 | 8-K | Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Sep 17, 2026 | 4 | FORM 4 | ↗ |
| Aug 11, 2026 | 10-Q | FORM 10-Q | ↗ |
| Aug 10, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Aug 6, 2026 | SCHEDULE 13G | ↗ | |
| May 12, 2026 | 10-Q | FORM 10-Q | ↗ |
| May 11, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| May 7, 2026 | 4 | FORM 4 | ↗ |
| May 7, 2026 | 4 | FORM 4 | ↗ |
| May 7, 2026 | 4 | FORM 4 | ↗ |
| May 7, 2026 | 4 | FORM 4 | ↗ |
| May 7, 2026 | 4 | FORM 4 | ↗ |
| May 7, 2026 | SCHEDULE 13G/A | ↗ | |
| Apr 28, 2026 | 8-K | Entry into a Material Agreement | ↗ |
| Mar 26, 2026 | SCHEDULE 13G/A | ↗ | |
| Mar 5, 2026 | 4 | FORM 4 | ↗ |
| Mar 4, 2026 | 4 | FORM 4 | ↗ |
| Feb 18, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 4/A | FORM 4/A | ↗ |
| Feb 10, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 4 | FORM 4 | ↗ |
| Feb 10, 2026 | 8-K | Item 5.07 | ↗ |
| Feb 10, 2026 | 10-Q | FORM 10-Q | ↗ |
| Feb 9, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Jan 29, 2026 | 4 | FORM 4 | ↗ |
| Dec 19, 2025 | 4/A | FORM 4/A | ↗ |
| Dec 19, 2025 | 4/A | FORM 4/A | ↗ |
| Dec 19, 2025 | 4/A | FORM 4/A | ↗ |
| Dec 19, 2025 | 4 | FORM 4 | ↗ |
| Dec 19, 2025 | ARS | ARS | ↗ |
| Dec 19, 2025 | DEFA14A | DEFA14A | ↗ |
| Dec 19, 2025 | DEF 14A | FORM DEF 14A | ↗ |
| Dec 9, 2025 | 4 | FORM 4 | ↗ |
| Nov 25, 2025 | 10-K | FORM 10-K | ↗ |
| Nov 24, 2025 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |