Amentum Holdings, Inc.
AMTM- Exchange
- NYSE
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0002011286
No open-market purchases or sales by Amentum Holdings, Inc. insiders were filed in the last 90 days; 465 institutions reported holding it in 13F filings for Q2 2026, worth $4.34B in total; Soros Fund Management is the only superinvestor holding it.
SEC filings
10-K, 10-Q, 8-K, 20-F and 40-F reports Amentum Holdings, Inc. filed with the SEC, newest first.
Livermore lists each filing's form, 8-K items and dates only. To read a filing, open it on SEC.gov; an 8-K's press release or other attachments, such as exhibit 99.1 for Item 2.02, are in the filing index.
| Filed | Form | 8-K items | Period | Document | Filing index |
|---|---|---|---|---|---|
| Oct 2, 2026 | 8-K | 5.029.01 | Sep 28, 2026 | SEC | Index |
| Aug 11, 2026 | 10-Q | – | Jul 3, 2026 | SEC | Index |
| Aug 10, 2026 | 8-K | 2.029.01 | Aug 10, 2026 | SEC | Index |
| May 12, 2026 | 10-Q | – | Apr 3, 2026 | SEC | Index |
| May 11, 2026 | 8-K | 2.029.01 | May 11, 2026 | SEC | Index |
| Apr 28, 2026 | 8-K | 1.01 | Apr 24, 2026 | SEC | Index |
| Feb 10, 2026 | 8-K | 5.07 | Feb 6, 2026 | SEC | Index |
| Feb 10, 2026 | 10-Q | – | Jan 2, 2026 | SEC | Index |
| Feb 9, 2026 | 8-K | 2.029.01 | Feb 9, 2026 | SEC | Index |
| Nov 25, 2025 | 10-K | – | Oct 3, 2025 | SEC | Index |
| Nov 24, 2025 | 8-K | 2.029.01 | Nov 24, 2025 | SEC | Index |
| Aug 6, 2025 | 10-Q | – | Jun 27, 2025 | SEC | Index |
| Aug 5, 2025 | 8-K | 2.029.01 | Aug 5, 2025 | SEC | Index |
| May 7, 2025 | 10-Q | – | Mar 28, 2025 | SEC | Index |
| May 6, 2025 | 8-K | 2.029.01 | May 6, 2025 | SEC | Index |
| Mar 7, 2025 | 8-K | 8.019.01 | Mar 7, 2025 | SEC | Index |
| Mar 7, 2025 | 8-K | 9.01 | Mar 7, 2025 | SEC | Index |
| Mar 7, 2025 | 8-K | 5.07 | Mar 5, 2025 | SEC | Index |
| Feb 5, 2025 | 10-Q | – | Dec 27, 2024 | SEC | Index |
| Feb 4, 2025 | 8-K | 2.029.01 | Feb 4, 2025 | SEC | Index |
| Jan 30, 2025 | 8-K | 5.029.01 | Jan 28, 2025 | SEC | Index |
| Dec 17, 2024 | 10-K | – | Sep 27, 2024 | SEC | Index |
| Dec 16, 2024 | 8-K | 2.02 | Dec 16, 2024 | SEC | Index |
| Nov 13, 2024 | 8-K | 5.029.01 | Nov 6, 2024 | SEC | Index |
| Oct 3, 2024 | 8-K/A | 1.011.022.039.01 | Sep 27, 2024 | SEC | Index |
| Oct 3, 2024 | 8-K | 1.012.015.015.025.037.019.01 | Sep 27, 2024 | SEC | Index |
| Sep 27, 2024 | 8-K | 5.025.039.01 | Sep 26, 2024 | SEC | Index |
| Sep 18, 2024 | 8-K | 7.019.01 | Sep 18, 2024 | SEC | Index |