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, Q4 2024
Institutional positions in Amentum Holdings, Inc. as of Dec 31, 2024. 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
- 451
- −38 vs. Q3 2024
- Shares held
- 165.3M
- +64.8M (+64.4%) vs. Q3 2024
- Total value
- $3.48B
- +$250.9M (+7.8%) vs. Q3 2024
- New holders
- 145
- 94 more added
- Sold out
- 183
- 158 more reduced
3 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2024: 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, Q4 2024
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Verition Fund Management LLC | 320,916 | $6.75M | 0.03% | +320,916 | New |
| Citigroup Inc | 327,762 | $6.89M | 0.01% | +212,912+185.4% | Added |
| Arosa Capital Management LP | 350,000 | $7.36M | 4.84% | +350,000 | New |
| Ameriprise Financial Inc | 359,227 | $7.55M | 0.00% | −53,806−13.0% | Reduced |
| New York State Common Retirement Fund | 378,952 | $7.97M | 0.01% | +300,431+382.6% | Added |
| Citadel Advisors LLC | 394,822 | $8.30M | 0.01% | −86,211−17.9% | Reduced |
| Voya Investment Management LLC | 404,115 | $8.50M | 0.01% | +404,115 | New |
| 683 Capital Management, LLC | 425,000 | $8.94M | 0.88% | +425,000 | New |
| Penn Capital Management Co Inc | 446,308 | $9.39M | 0.92% | +446,308 | New |
| Voss Capital, LLC | 449,818 | $9.46M | 0.70% | +449,818 | New |
| Discovery Capital Management, LLC | 465,300 | $9.79M | 0.67% | +465,300 | New |
| Aristotle Capital Boston, LLC | 476,977 | $10.0M | 0.37% | +431,299+944.2% | Added |
| Moore Capital Management, LP | 592,190 | $12.5M | 0.23% | +592,190 | New |
| Principal Financial Group Inc | 602,049 | $12.7M | 0.01% | +456,475+313.6% | Added |
| Bank of America Corp | 608,845 | $12.8M | 0.00% | −1,064,410−63.6% | Reduced |
| Royal Bank of Canada | 618,903 | $13.0M | 0.00% | +285,607+85.7% | Added |
| Engine Capital Management, LP | 621,400 | $13.1M | 2.39% | +621,400 | New |
| CSM Advisors, LLC | 639,057 | $13.4M | 0.63% | +553,435+646.4% | Added |
| Ci Investments Inc. | 643,115 | $13.5M | 0.05% | −330,742−34.0% | Reduced |
| Bank of New York Mellon Corp | 651,314 | $13.7M | 0.00% | −123,740−16.0% | Reduced |
| Legal & General Group Plc | 678,103 | $14.3M | 0.00% | +18,403+2.8% | Added |
| Kopernik Global Investors, LLC | 765,982 | $16.1M | 1.72% | +765,982 | New |
| Northern Trust Corp | 842,219 | $17.7M | 0.00% | +693,706+467.1% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 869,596 | $18.3M | 0.04% | +37,571+4.5% | Added |
| Cacti Asset Management LLC | 824,464 | $18.4M | 1.42% | +824,464 | New |
| Susquehanna International Group, LLP | 876,361 | $18.4M | 0.03% | +827,362+1,688.5% | Added |
| Arvin Capital Management LP | 965,197 | $20.3M | 8.15% | +965,197 | New |
| Castalian Partners, LLC | 1,000,000 | $21.0M | 19.87% | +1,000,000 | New |
| UBS Group AG | 1,131,744 | $23.8M | 0.01% | +705,180+165.3% | Added |
| Van Eck Associates Corp | 1,132,285 | $23.8M | 0.03% | +1,132,285 | New |
| Dimensional Fund Advisors LP | 1,154,130 | $24.3M | 0.01% | −105,218−8.4% | Reduced |
| Millennium Management LLC | 1,196,574 | $25.2M | 0.02% | +524,807+78.1% | Added |
| Charles Schwab Investment Management Inc | 1,264,257 | $26.6M | 0.00% | +503,741+66.2% | Added |
| Norges Bank | 1,440,127 | $30.3M | 0.00% | +1,440,127 | New |
| Morgan Stanley | 1,482,521 | $31.2M | 0.00% | +455,572+44.4% | Added |
| Thrivent Financial for Lutherans | 1,611,796 | $33.9M | 0.07% | +1,076,375+201.0% | Added |
| FIL Ltd | 1,793,553 | $37.7M | 0.04% | +1,058,441+144.0% | Added |
| Thompson Siegel & Walmsley LLC | 1,948,684 | $41.0M | 0.64% | +1,606,442+469.4% | Added |
| Geode Capital Management, LLC | 1,963,248 | $41.3M | 0.00% | −1,182,016−37.6% | Reduced |
| Wellington Management Group LLP | 2,333,221 | $49.1M | 0.01% | +1,398,143+149.5% | Added |
| FMR LLC | 2,395,053 | $50.4M | 0.00% | +2,315,738+2,919.7% | Added |
| Ruane, Cunniff & Goldfarb L.P. | 2,436,294 | $51.2M | 0.87% | −94,195−3.7% | Reduced |
| Allspring Global Investments Holdings, LLC | 2,420,967 | $52.4M | 0.08% | −10,008−0.4% | Reduced |
| Kovitz Investment Group Partners, LLC | 3,152,262 | $66.3M | 0.33% | +3,017,236+2,234.6% | Added |
| Cooper Creek Partners Management LLC | 4,157,034 | $87.4M | 2.70% | +3,319,364+396.3% | Added |
| Primecap Management Co | 6,414,379 | $134.9M | 0.10% | +1,143,097+21.7% | Added |
| State Street Corp | 6,454,253 | $135.7M | 0.01% | −873,055−11.9% | Reduced |
| Invesco Ltd. | 13,856,239 | $291.4M | 0.05% | +6,055,638+77.6% | Added |
| Vanguard Group Inc | 16,542,447 | $347.9M | 0.01% | +2,529,173+18.0% | Added |
| BlackRock, Inc. | 16,774,771 | $352.8M | 0.01% | +7,857,343+88.1% | Added |
| American Securities LLC | 43,893,904 | $923.1M | 100.00% | +43,893,904 | New |
| Barrow Hanley Mewhinney & Strauss LLC | 0 | $0 | 0.00% | −3,225,967−100.0% | Sold out |
| Boston Partners | 0 | $0 | 0.00% | −2,983,146−100.0% | Sold out |
| Ninety One UK Ltd | 0 | $0 | 0.00% | −1,538,931−100.0% | Sold out |
| Massachusetts Financial Services Co | 0 | $0 | 0.00% | −1,228,298−100.0% | Sold out |
| Simcoe Capital Management, LLC | 0 | $0 | 0.00% | −1,153,105−100.0% | Sold out |
| Caisse de Depot Et Placement du Quebec | 0 | $0 | 0.00% | −718,039−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −514,562−100.0% | Sold out |
| Agf Management Ltd | 0 | $0 | 0.00% | −365,376−100.0% | Sold out |
| Sessa Capital IM, L.P. | 0 | $0 | 0.00% | −354,699−100.0% | Sold out |
| Madison Avenue Partners, LP | 0 | $0 | 0.00% | −383,218−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −321,096−100.0% | Sold out |
| Todd Asset Management LLC | 0 | $0 | 0.00% | −307,663−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −287,886−100.0% | Sold out |
| Waters Parkerson & Co., LLC | 0 | $0 | 0.00% | −203,578−100.0% | Sold out |
| Korea Investment CORP | 0 | $0 | 0.00% | −197,972−100.0% | Sold out |
| Campbell Newman Asset Management Inc | 0 | $0 | 0.00% | −193,208−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −184,900−100.0% | Sold out |
| Fort Baker Capital Management LP | 0 | $0 | 0.00% | −167,490−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −204,047−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −118,027−100.0% | Sold out |
| La Banque Postale Asset Management SA | 0 | $0 | 0.00% | −115,535−100.0% | Sold out |
| F/M Investments LLC | 0 | $0 | 0.00% | −109,887−100.0% | Sold out |
| Mackenzie Financial Corp | 0 | $0 | 0.00% | −104,687−100.0% | Sold out |
| Wedge Capital Management L L P | 0 | $0 | 0.00% | −83,542−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −81,538−100.0% | Sold out |
| Manufacturers Life Insurance Company, The | 0 | $0 | 0.00% | −79,030−100.0% | Sold out |
| Asset Management One Co.,Ltd. | 0 | $0 | 0.00% | −76,777−100.0% | Sold out |
| ZWJ Investment Counsel Inc | 0 | $0 | 0.00% | −69,967−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −69,249−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −67,549−100.0% | Sold out |
| Chevy Chase Trust Holdings, Inc. | 0 | $0 | 0.00% | −67,201−100.0% | Sold out |
| Wharton Business Group, LLC | 0 | $0 | 0.00% | −65,295−100.0% | Sold out |
| Greenwood Gearhart Inc | 0 | $0 | 0.00% | −60,733−100.0% | Sold out |
| Carmel Capital Management L.L.C. | 0 | $0 | 0.00% | −58,833−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −58,116−100.0% | Sold out |
| Royal London Asset Management Ltd | 0 | $0 | 0.00% | −55,672−100.0% | Sold out |
| Bancreek Capital Management, LP | 0 | $0 | 0.00% | −55,288−100.0% | Sold out |
| McKinley Carter Wealth Services, Inc. | 0 | $0 | 0.00% | −54,707−100.0% | Sold out |
| Bridgewater Associates, LP | 0 | $0 | 0.00% | −48,532−100.0% | Sold out |
| Robeco Institutional Asset Management B.V. | 0 | $0 | 0.00% | −41,443−100.0% | Sold out |
| Scopus Asset Management, L.P. | 0 | $0 | 0.00% | −37,282−100.0% | Sold out |
| AXA S.A. | 0 | $0 | 0.00% | −36,585−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −35,958−100.0% | Sold out |
| Daiwa Securities Group Inc. | 0 | $0 | 0.00% | −35,390−100.0% | Sold out |
| Malaga Cove Capital, LLC | 0 | $0 | 0.00% | −35,006−100.0% | Sold out |
| State of Michigan Retirement System | 0 | $0 | 0.00% | −34,099−100.0% | Sold out |
| Resona Asset Management Co.,Ltd. | 0 | $0 | 0.00% | −33,376−100.0% | Sold out |
| Oppenheimer Asset Management Inc. | 0 | $0 | 0.00% | −32,927−100.0% | Sold out |
| Louisbourg Investments Inc. | 0 | $0 | 0.00% | −38,368−100.0% | Sold out |