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 2024
Institutional positions in Amentum Holdings, Inc. as of Sep 30, 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
- 492
- +492 vs. Q2 2024
- Shares held
- 100.6M
- +100.6M vs. Q2 2024
- Total value
- $3.23B
- +$3.23B vs. Q2 2024
- New holders
- 492
- 0 more added
- Sold out
- 0
- 0 more reduced
Compare with Q2 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, Q3 2024
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q2 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Janus Henderson Group PLC | 117,059 | $3.50M | 0.00% | +117,059 | New |
| F/M Investments LLC | 109,887 | $3.54M | 0.12% | +109,887 | New |
| State of Wisconsin Investment Board | 110,257 | $3.56M | 0.01% | +110,257 | New |
| Citigroup Inc | 114,850 | $3.70M | 0.00% | +114,850 | New |
| La Banque Postale Asset Management SA | 115,535 | $3.73M | 0.06% | +115,535 | New |
| New York State Teachers Retirement System | 116,135 | $3.75M | 0.01% | +116,135 | New |
| Adage Capital Partners GP, L.L.C. | 118,027 | $3.81M | 0.01% | +118,027 | New |
| State of Tennessee, Treasury Department | 118,655 | $3.83M | 0.01% | +118,655 | New |
| Wealth Enhancement Advisory Services, LLC | 121,080 | $3.90M | 0.01% | +121,080 | New |
| Tower Bridge Advisors | 125,662 | $4.05M | 0.42% | +125,662 | New |
| Lathrop Investment Management Corp | 127,169 | $4.10M | 0.76% | +127,169 | New |
| Washington Trust Advisors, Inc. | 128,198 | $4.13M | 0.36% | +128,198 | New |
| United Capital Financial Advisers, LLC | 130,560 | $4.21M | 0.03% | +130,560 | New |
| State Board of Administration of Florida Retirement System | 132,514 | $4.27M | 0.01% | +132,514 | New |
| Kovitz Investment Group Partners, LLC | 135,026 | $4.30M | 0.03% | +135,026 | New |
| Alliancebernstein L.P. | 142,646 | $4.60M | 0.00% | +142,646 | New |
| Principal Financial Group Inc | 145,574 | $4.69M | 0.00% | +145,574 | New |
| Northern Trust Corp | 148,513 | $4.79M | 0.00% | +148,513 | New |
| Hutchinson Capital Management | 148,572 | $4.79M | 0.91% | +148,572 | New |
| Barclays PLC | 159,813 | $5.15M | 0.00% | +159,813 | New |
| Lazard Asset Management LLC | 204,047 | $5.24M | 0.01% | +204,047 | New |
| HSBC Holdings PLC | 175,788 | $5.31M | 0.00% | +175,788 | New |
| Fort Baker Capital Management LP | 167,490 | $5.40M | 0.90% | +167,490 | New |
| Price T Rowe Associates Inc | 174,558 | $5.63M | 0.00% | +174,558 | New |
| Two Sigma Advisers, LP | 184,900 | $5.96M | 0.01% | +184,900 | New |
| Mesirow Financial Investment Management, Inc. | 185,990 | $6.00M | 0.12% | +185,990 | New |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 187,975 | $6.06M | 0.01% | +187,975 | New |
| Canada Pension Plan Investment Board | 188,032 | $6.06M | 0.01% | +188,032 | New |
| Campbell Newman Asset Management Inc | 193,208 | $6.23M | 0.47% | +193,208 | New |
| Korea Investment CORP | 197,972 | $6.38M | 0.02% | +197,972 | New |
| Natixis Advisors, L.P. | 200,665 | $6.47M | 0.01% | +200,665 | New |
| Waters Parkerson & Co., LLC | 203,578 | $6.57M | 0.33% | +203,578 | New |
| Teachers Retirement System of the State of Kentucky | 212,085 | $6.84M | 0.06% | +212,085 | New |
| Victory Capital Management Inc | 212,150 | $6.84M | 0.01% | +212,150 | New |
| California State Teachers Retirement System | 216,601 | $6.99M | 0.01% | +216,601 | New |
| Rhumbline Advisers | 221,858 | $7.15M | 0.01% | +221,858 | New |
| Williams Jones Wealth Management, LLC. | 223,803 | $7.22M | 0.08% | +223,803 | New |
| SEI Investments Co | 243,716 | $7.86M | 0.01% | +243,716 | New |
| California Public Employees Retirement System | 256,237 | $8.26M | 0.01% | +256,237 | New |
| JPMorgan Chase & Co | 270,969 | $8.74M | 0.00% | +270,969 | New |
| Wells Fargo & Company | 272,118 | $8.78M | 0.00% | +272,118 | New |
| Colony Group, LLC | 275,140 | $8.87M | 0.03% | +275,140 | New |
| American Century Companies Inc | 287,886 | $9.28M | 0.01% | +287,886 | New |
| Todd Asset Management LLC | 307,663 | $9.92M | 0.23% | +307,663 | New |
| Swiss National Bank | 312,800 | $10.1M | 0.01% | +312,800 | New |
| Envestnet Asset Management Inc | 318,115 | $10.1M | 0.00% | +318,115 | New |
| Two Sigma Investments, LP | 321,096 | $10.4M | 0.02% | +321,096 | New |
| Royal Bank of Canada | 333,296 | $10.7M | 0.00% | +333,296 | New |
| Thompson Siegel & Walmsley LLC | 342,242 | $11.0M | 0.17% | +342,242 | New |
| Madison Avenue Partners, LP | 383,218 | $11.1M | 1.03% | +383,218 | New |
| Sessa Capital IM, L.P. | 354,699 | $11.4M | 0.44% | +354,699 | New |
| Agf Management Ltd | 365,376 | $11.8M | 0.06% | +365,376 | New |
| Ameriprise Financial Inc | 413,033 | $13.3M | 0.00% | +413,033 | New |
| UBS Group AG | 426,564 | $13.8M | 0.00% | +426,564 | New |
| Nuveen Asset Management, LLC | 436,524 | $14.1M | 0.00% | +436,524 | New |
| Renaissance Technologies LLC | 440,500 | $14.2M | 0.02% | +440,500 | New |
| AQR Capital Management LLC | 639,326 | $15.3M | 0.02% | +639,326 | New |
| Citadel Advisors LLC | 481,033 | $15.5M | 0.02% | +481,033 | New |
| First Trust Advisors LP | 514,562 | $16.6M | 0.02% | +514,562 | New |
| Thrivent Financial for Lutherans | 535,421 | $17.3M | 0.03% | +535,421 | New |
| Legal & General Group Plc | 659,700 | $21.3M | 0.01% | +659,700 | New |
| Millennium Management LLC | 671,767 | $21.7M | 0.02% | +671,767 | New |
| UBS Asset Management Americas Inc | 674,167 | $21.7M | 0.01% | +674,167 | New |
| Caisse de Depot Et Placement du Quebec | 718,039 | $23.2M | 0.05% | +718,039 | New |
| FIL Ltd | 735,112 | $23.7M | 0.02% | +735,112 | New |
| Charles Schwab Investment Management Inc | 760,516 | $24.5M | 0.00% | +760,516 | New |
| Bank of New York Mellon Corp | 775,054 | $25.0M | 0.00% | +775,054 | New |
| Goldman Sachs Group Inc | 782,805 | $25.2M | 0.00% | +782,805 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 832,025 | $26.8M | 0.06% | +832,025 | New |
| Cooper Creek Partners Management LLC | 837,670 | $27.0M | 0.87% | +837,670 | New |
| Neuberger Berman Group LLC | 890,474 | $28.7M | 0.02% | +890,474 | New |
| Deutsche Bank AG | 934,082 | $30.1M | 0.01% | +934,082 | New |
| Wellington Management Group LLP | 935,078 | $30.2M | 0.01% | +935,078 | New |
| Ci Investments Inc. | 973,857 | $31.4M | 0.12% | +973,857 | New |
| Morgan Stanley | 1,026,949 | $33.1M | 0.00% | +1,026,949 | New |
| Simcoe Capital Management, LLC | 1,153,105 | $37.2M | 4.88% | +1,153,105 | New |
| Massachusetts Financial Services Co | 1,228,298 | $39.6M | 0.01% | +1,228,298 | New |
| Dimensional Fund Advisors LP | 1,259,348 | $40.5M | 0.01% | +1,259,348 | New |
| Ninety One UK Ltd | 1,538,931 | $49.6M | 0.13% | +1,538,931 | New |
| Bank of America Corp | 1,673,255 | $54.0M | 0.00% | +1,673,255 | New |
| Macquarie Group Ltd | 1,852,880 | $59.8M | 0.06% | +1,852,880 | New |
| Allspring Global Investments Holdings, LLC | 2,430,975 | $78.4M | 0.12% | +2,430,975 | New |
| Ruane, Cunniff & Goldfarb L.P. | 2,530,489 | $81.6M | 1.28% | +2,530,489 | New |
| Boston Partners | 2,983,146 | $95.8M | 0.11% | +2,983,146 | New |
| Geode Capital Management, LLC | 3,145,264 | $101.0M | 0.01% | +3,145,264 | New |
| Barrow Hanley Mewhinney & Strauss LLC | 3,225,967 | $104.0M | 0.34% | +3,225,967 | New |
| Primecap Management Co | 5,271,282 | $170.0M | 0.12% | +5,271,282 | New |
| State Street Corp | 7,327,308 | $236.3M | 0.01% | +7,327,308 | New |
| Invesco Ltd. | 7,800,601 | $251.6M | 0.05% | +7,800,601 | New |
| BlackRock, Inc. | 8,917,428 | $287.6M | 0.01% | +8,917,428 | New |
| Vanguard Group Inc | 14,013,274 | $451.9M | 0.01% | +14,013,274 | New |
| BDF-Gestion | 18,124 | – | – | +18,124 | New |