🕵️ Amentum Holdings, Inc. ($AMTM)
SEC insider & ownership activity, last 12 months · CIK 2011286 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. Invesco Ltd. added 9.1% → 10.1%. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| ASP Amentum Investco LP | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| American Securities LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| ASP Manager Corp. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Goldberg 2014 LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Alan E. Goldberg | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg Employee Co-Inv. IV L.P. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Goldberg 2020 LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| LG GP Holding IV LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| LG GP Holding V LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg GP IV LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg GP V LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg IV L.p. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg IV - A L.P. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg IV - PCF L.P. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg Co-Inv. IV L.P. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lg Co-Inv. A L.p. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg V L.p. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Lindsay Goldberg Maverick Co-Inv. L.P. | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| LG Amentum Holdings GP LLC | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| LG Amentum Holdings LP | 18.0% | 13D | Dec 17, 2024 | filing ↗ | |
| Invesco Ltd. | 10.1% | 13G | May 7, 2026 | filing ↗ | |
| Blackrock, Inc. | 6.9% | 13G | Feb 5, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | May 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 11, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 24, 2026 | filing ↗ |
| Earnings (2.02) | Feb 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 9, 2026 | filing ↗ |
| Shareholder vote (5.07) | Feb 6, 2026 | filing ↗ |
| Earnings (2.02) | Nov 24, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 24, 2025 | filing ↗ |
| Earnings (2.02) | Aug 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2025 | filing ↗ |