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; 464 institutions reported holding it in 13F filings for Q2 2026, worth $4.34B in total; Soros Fund Management is the only superinvestor holding it.
13F holders, Q2 2025
Institutional positions in Amentum Holdings, Inc. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 461
- +48 vs. Q1 2025
- Shares held
- 200.3M
- +8.87M (+4.6%) vs. Q1 2025
- Total value
- $4.73B
- +$1.25B (+35.7%) vs. Q1 2025
- New holders
- 113
- 233 more added
- Sold out
- 65
- 100 more reduced
5 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting AMTM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 464 | $4.34B |
| Q1 2026 | 486 | $5.28B |
| Q4 2025 | 483 | $5.64B |
| Q3 2025 | 462 | $4.63B |
| Q2 2025 | 461 | $4.73B |
| Q1 2025 | 418 | $3.49B |
| Q4 2024 | 451 | $3.48B |
| Q3 2024 | 492 | $3.23B |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Red Spruce Capital, LLC | 0 | $0 | 0.00% | −10,705−100.0% | Sold out |
| Virginia Retirement Systems Et Al | 0 | $0 | 0.00% | −10,700−100.0% | Sold out |
| Lecap Asset Management Ltd | 0 | $0 | 0.00% | −10,437−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −10,046−100.0% | Sold out |
| Washington Trust Co | 0 | $0 | 0.00% | −7,541−100.0% | Sold out |
| Legacy Bridge, LLC | 0 | $0 | 0.00% | −6,680−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −5,630−100.0% | Sold out |
| MetLife Investment Management | 0 | $0 | 0.00% | −2,663−100.0% | Sold out |
| Coldstream Capital Management Inc | 0 | $0 | 0.00% | −1,941−100.0% | Sold out |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −1,338−100.0% | Sold out |
| Quent Capital, LLC | 0 | $0 | 0.00% | −789−100.0% | Sold out |
| Boston Private Wealth LLC | 0 | $0 | 0.00% | −669−100.0% | Sold out |
| Mather Group, LLC. | 0 | $0 | 0.00% | −487−100.0% | Sold out |
| Wiser Advisor Group LLC | 0 | $0 | 0.00% | −295−100.0% | Sold out |
| Ameliora Wealth Management Ltd. | 0 | $0 | 0.00% | −223−100.0% | Sold out |
| Continuum Advisory, LLC | 0 | $0 | 0.00% | −180−100.0% | Sold out |
| Richards, Merrill & Peterson, Inc. | 0 | $0 | 0.00% | −170−100.0% | Sold out |
| Community Bank, N.A. | 0 | $0 | 0.00% | −150−100.0% | Sold out |
| Studio Investment Management LLC | 0 | $0 | 0.00% | −144−100.0% | Sold out |
| Cherry Tree Wealth Management, LLC | 0 | $0 | 0.00% | −75−100.0% | Sold out |
| Mechanics Financial Corp | 0 | $0 | 0.00% | −64−100.0% | Sold out |
| Synergy Investment Management, LLC | 0 | $0 | 0.00% | −49−100.0% | Sold out |
| Redwood Park Advisors LLC | 0 | $0 | 0.00% | −14−100.0% | Sold out |
| Greenline Partners, LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| Carolinas Wealth Consulting LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Winnow Wealth LLC | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Keeley-Teton Advisors, LLC | – | – | – | – | Not filed |
| Kodai Capital Management LP | – | – | – | – | Not filed |
| Sandy Spring Bank | – | – | – | – | Not filed |
| Lindbrook Capital, LLC | – | – | – | – | Not filed |
| Sofos Investments, Inc. | – | – | – | – | Not filed |