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, Q3 2025
Institutional positions in Amentum Holdings, Inc. as of Sep 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
- 462
- +7 vs. Q2 2025
- Shares held
- 193.4M
- −4.76M (−2.4%) vs. Q2 2025
- Total value
- $4.63B
- −$48.2M (−1.0%) vs. Q2 2025
- New holders
- 76
- 104 more added
- Sold out
- 69
- 179 more reduced
6 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| SBI Securities Co., Ltd. | 45 | $1.08K | 0.00% | −11−19.6% | Reduced |
| RMG Wealth Management LLC | 43 | $970 | 0.00% | 00.0% | Unchanged |
| Atlantic Trust, LLC | 40 | $958 | 0.00% | 00.0% | Unchanged |
| Bruce G. Allen Investments, LLC | 40 | $958 | 0.00% | 00.0% | Unchanged |
| Kozak & Associates, Inc. | 44 | $946 | 0.00% | −61−58.1% | Reduced |
| North Star Investment Management Corp. | 39 | $934 | 0.00% | 00.0% | Unchanged |
| MV Capital Management, Inc. | 36 | $863 | 0.00% | +2+5.9% | Added |
| Deseret Mutual Benefit Administrators | 36 | $862 | 0.00% | −238−86.9% | Reduced |
| Creekmur Asset Management LLC | 34 | $814 | 0.00% | +18+112.5% | Added |
| Principal Securities, Inc. | 33 | $790 | 0.00% | −2−5.7% | Reduced |
| Creative Financial Designs Inc | 33 | $790 | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 31 | $742 | 0.00% | −248−88.9% | Reduced |
| CVA Family Office, LLC | 29 | $695 | 0.00% | 00.0% | Unchanged |
| Contravisory Investment Management, Inc. | 27 | $647 | 0.00% | −206−88.4% | Reduced |
| Rialto Wealth Management, LLC | 27 | $647 | 0.00% | −23−46.0% | Reduced |
| JFS Wealth Advisors, LLC | 27 | $647 | 0.00% | 00.0% | Unchanged |
| Clayton Financial Group LLC | 27 | $647 | 0.00% | +27 | New |
| Logan Capital Management Inc | 24 | $575 | 0.00% | 00.0% | Unchanged |
| Sofos Investments, Inc. | 24 | $575 | 0.00% | +24 | New |
| Red Tortoise LLC | 23 | $551 | 0.00% | 00.0% | Unchanged |
| AdvisorNet Financial, Inc | 22 | $527 | 0.00% | 00.0% | Unchanged |
| Team Financial Group, LLC | 21 | $503 | 0.00% | 00.0% | Unchanged |
| Louisbourg Investments Inc. | 20 | $479 | 0.00% | −135−87.1% | Reduced |
| Trust Co | 20 | $479 | 0.00% | +20 | New |
| Johnson Financial Group, Inc. | 19 | $456 | 0.00% | +19 | New |
| Leonteq Securities AG | 19 | $455 | 0.00% | −2,000−99.1% | Reduced |
| South State Corp. | 18 | $432 | 0.00% | −6−25.0% | Reduced |
| Trust Co of Vermont | 18 | $431 | 0.00% | 00.0% | Unchanged |
| TD Capital Management LLC | 18 | $431 | 0.00% | 00.0% | Unchanged |
| Horizon Investments, LLC | 16 | $383 | 0.00% | −97−85.8% | Reduced |
| Prestige Wealth Management Group LLC | 14 | $336 | 0.00% | 00.0% | Unchanged |
| Wealth Watch Advisors, INC | 13 | $311 | 0.00% | +13 | New |
| NBT Bank N A | 12 | $287 | 0.00% | −126−91.3% | Reduced |
| Virtus ETF Advisers LLC | 12 | $287 | 0.00% | −109−90.1% | Reduced |
| Manchester Capital Management LLC | 10 | $240 | 0.00% | −715−98.6% | Reduced |
| Annis Gardner Whiting Capital Advisors, LLC | 10 | $240 | 0.00% | 00.0% | Unchanged |
| Binnacle Investments Inc | 10 | $240 | 0.00% | +10 | New |
| Kayne Anderson Rudnick Investment Management LLC | 8 | $192 | 0.00% | −4−33.3% | Reduced |
| Abound Wealth Management | 8 | $192 | 0.00% | 00.0% | Unchanged |
| UMA Financial Services, Inc. | 7 | $168 | 0.00% | 00.0% | Unchanged |
| IMA Wealth, Inc. | 7 | $168 | 0.00% | 00.0% | Unchanged |
| Cornerstone Planning Group LLC | 6 | $131 | 0.00% | 00.0% | Unchanged |
| Zions Bancorporation, National Association | 4 | $96 | 0.00% | 00.0% | Unchanged |
| Morton Brown Family Wealth, LLC | 4 | $96 | 0.00% | 00.0% | Unchanged |
| Archer Investment Corp | 3 | $74 | 0.00% | 00.0% | Unchanged |
| SOA Wealth Advisors, LLC. | 3 | $72 | 0.00% | 00.0% | Unchanged |
| Strengthening Families & Communities, LLC | 3 | $71 | 0.00% | +3 | New |
| Dunhill Financial, LLC | 3 | $63 | 0.00% | +1+50.0% | Added |
| Park Place Capital Corp | 2 | $48 | 0.00% | 00.0% | Unchanged |
| Scarborough Advisors, LLC | 2 | $48 | 0.00% | 00.0% | Unchanged |
| Private Wealth Asset Management, LLC | 2 | $48 | 0.00% | 00.0% | Unchanged |
| Transamerica Financial Advisors, Inc. | 2 | $48 | 0.00% | +2 | New |
| Dynamic Wealth Strategies, LLC | 1 | $24 | 0.00% | −54−98.2% | Reduced |
| Costello Asset Management, INC | 1 | $24 | 0.00% | −12−92.3% | Reduced |
| Activest Wealth Management | 1 | $24 | 0.00% | −2−66.7% | Reduced |
| SWAN Capital LLC | 1 | $24 | 0.00% | 00.0% | Unchanged |
| Cetera Trust Company, N.A | 1 | $24 | 0.00% | 00.0% | Unchanged |
| First Horizon Corp | 1 | $24 | 0.00% | +1 | New |
| Sunbelt Securities, Inc. | 1 | $24 | 0.00% | +1 | New |
| Winnow Wealth LLC | 1 | $24 | 0.00% | +1 | New |
| Picton Mahoney Asset Management | 8 | $0 | 0.00% | 00.0% | Unchanged |
| Franklin Resources Inc | 9,035 | – | – | +9,035 | New |
| Kopernik Global Investors, LLC | 0 | $0 | 0.00% | −636,226−100.0% | Sold out |
| Engine Capital Management, LP | 0 | $0 | 0.00% | −635,255−100.0% | Sold out |
| Loews Corp | 0 | $0 | 0.00% | −470,000−100.0% | Sold out |
| Arosa Capital Management LP | 0 | $0 | 0.00% | −252,500−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −198,726−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −108,212−100.0% | Sold out |
| RFG Advisory, LLC | 0 | $0 | 0.00% | −102,171−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −74,831−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Fortress Investment Group LLC | 0 | $0 | 0.00% | −38,106−100.0% | Sold out |
| Highland Capital Management Fund Advisors, L.P. | 0 | $0 | 0.00% | −35,263−100.0% | Sold out |
| Oak Thistle LLC | 0 | $0 | 0.00% | −28,230−100.0% | Sold out |
| Proficio Capital Partners LLC | 0 | $0 | 0.00% | −26,031−100.0% | Sold out |
| Marco Investment Management LLC | 0 | $0 | 0.00% | −25,157−100.0% | Sold out |
| Wesbanco Bank Inc | 0 | $0 | 0.00% | −24,466−100.0% | Sold out |
| Sandia Investment Management LP | 0 | $0 | 0.00% | −22,505−100.0% | Sold out |
| Phoenix Holdings Ltd. | 0 | $0 | 0.00% | −18,932−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −15,609−100.0% | Sold out |
| Rock Creek Group, LP | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| Aristeia Capital LLC | 0 | $0 | 0.00% | −13,568−100.0% | Sold out |
| Worldquant Millennium Advisors LLC | 0 | $0 | 0.00% | −13,358−100.0% | Sold out |
| Whalen Wealth Management Inc. | 0 | $0 | 0.00% | −11,616−100.0% | Sold out |
| United Capital Financial Advisers, LLC | 0 | $0 | 0.00% | −11,228−100.0% | Sold out |
| Mesirow Financial Investment Management, Inc. | 0 | $0 | 0.00% | −10,515−100.0% | Sold out |
| Diametric Capital, LP | 0 | $0 | 0.00% | −10,343−100.0% | Sold out |
| Everett Harris & Co | 0 | $0 | 0.00% | −10,085−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −10,014−100.0% | Sold out |
| Lingohr & Partner Asset Management GmbH | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Kentucky Retirement Systems | 0 | $0 | 0.00% | −9,971−100.0% | Sold out |
| Utah Retirement Systems | 0 | $0 | 0.00% | −9,183−100.0% | Sold out |
| Cantor Fitzgerald, L. P. | 0 | $0 | 0.00% | −9,087−100.0% | Sold out |
| Ethic Inc. | 0 | $0 | 0.00% | −9,149−100.0% | Sold out |
| Intact Investment Management Inc. | 0 | $0 | 0.00% | −7,319−100.0% | Sold out |
| American National Bank | 0 | $0 | 0.00% | −6,788−100.0% | Sold out |
| Glenmede Investment Management, LP | 0 | $0 | 0.00% | −4,325−100.0% | Sold out |
| Caldwell Trust Co | 0 | $0 | 0.00% | −1,954−100.0% | Sold out |
| Riggs Asset Managment Co. Inc. | 0 | $0 | 0.00% | −1,931−100.0% | Sold out |
| Ofi Invest Asset Management | 0 | $0 | 0.00% | −2,051−100.0% | Sold out |