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 $4.35B 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
- 100.8M
- +100.8M vs. Q2 2024
- Total value
- $3.25B
- +$3.25B 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 | $4.35B |
| Q1 2026 | 486 | $5.28B |
| Q4 2025 | 483 | $5.64B |
| Q3 2025 | 462 | $4.63B |
| Q2 2025 | 461 | $4.74B |
| Q1 2025 | 418 | $3.50B |
| Q4 2024 | 451 | $3.50B |
| Q3 2024 | 492 | $3.25B |
| 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 |
|---|---|---|---|---|---|
| Vanguard Group Inc | 14,013,274 | $451.9M | 0.01% | +14,013,274 | New |
| BlackRock, Inc. | 8,917,428 | $287.6M | 0.01% | +8,917,428 | New |
| Invesco Ltd. | 7,800,601 | $251.6M | 0.05% | +7,800,601 | New |
| State Street Corp | 7,327,308 | $236.3M | 0.01% | +7,327,308 | New |
| Primecap Management Co | 5,271,282 | $170.0M | 0.12% | +5,271,282 | New |
| Barrow Hanley Mewhinney & Strauss LLC | 3,225,967 | $104.0M | 0.34% | +3,225,967 | New |
| Geode Capital Management, LLC | 3,145,264 | $101.0M | 0.01% | +3,145,264 | New |
| Boston Partners | 2,983,146 | $95.8M | 0.11% | +2,983,146 | New |
| Ruane, Cunniff & Goldfarb L.P. | 2,530,489 | $81.6M | 1.28% | +2,530,489 | New |
| Allspring Global Investments Holdings, LLC | 2,430,975 | $78.4M | 0.12% | +2,430,975 | New |
| Macquarie Group Ltd | 1,852,880 | $59.8M | 0.06% | +1,852,880 | New |
| Bank of America Corp | 1,673,255 | $54.0M | 0.00% | +1,673,255 | New |
| Ninety One UK Ltd | 1,538,931 | $49.6M | 0.13% | +1,538,931 | New |
| Dimensional Fund Advisors LP | 1,259,348 | $40.5M | 0.01% | +1,259,348 | New |
| Massachusetts Financial Services Co | 1,228,298 | $39.6M | 0.01% | +1,228,298 | New |
| Simcoe Capital Management, LLC | 1,153,105 | $37.2M | 4.88% | +1,153,105 | New |
| Morgan Stanley | 1,026,949 | $33.1M | 0.00% | +1,026,949 | New |
| Ci Investments Inc. | 973,857 | $31.4M | 0.12% | +973,857 | New |
| Wellington Management Group LLP | 935,078 | $30.2M | 0.01% | +935,078 | New |
| Deutsche Bank AG | 934,082 | $30.1M | 0.01% | +934,082 | New |
| Neuberger Berman Group LLC | 890,474 | $28.7M | 0.02% | +890,474 | New |
| Cooper Creek Partners Management LLC | 837,670 | $27.0M | 0.87% | +837,670 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 832,025 | $26.8M | 0.06% | +832,025 | New |
| Goldman Sachs Group Inc | 782,805 | $25.2M | 0.00% | +782,805 | New |
| Bank of New York Mellon Corp | 775,054 | $25.0M | 0.00% | +775,054 | New |
| Charles Schwab Investment Management Inc | 760,516 | $24.5M | 0.00% | +760,516 | New |
| FIL Ltd | 735,112 | $23.7M | 0.02% | +735,112 | New |
| Caisse de Depot Et Placement du Quebec | 718,039 | $23.2M | 0.05% | +718,039 | New |
| UBS Asset Management Americas Inc | 674,167 | $21.7M | 0.01% | +674,167 | New |
| Millennium Management LLC | 671,767 | $21.7M | 0.02% | +671,767 | New |
| Legal & General Group Plc | 659,700 | $21.3M | 0.01% | +659,700 | New |
| JPMorgan Chase & Co | 541,938 | $17.5M | 0.00% | +541,938 | New |
| Thrivent Financial for Lutherans | 535,421 | $17.3M | 0.03% | +535,421 | New |
| First Trust Advisors LP | 514,562 | $16.6M | 0.02% | +514,562 | New |
| Citadel Advisors LLC | 481,033 | $15.5M | 0.02% | +481,033 | New |
| AQR Capital Management LLC | 639,326 | $15.3M | 0.02% | +639,326 | New |
| Renaissance Technologies LLC | 440,500 | $14.2M | 0.02% | +440,500 | New |
| Nuveen Asset Management, LLC | 436,524 | $14.1M | 0.00% | +436,524 | New |
| UBS Group AG | 426,564 | $13.8M | 0.00% | +426,564 | New |
| Ameriprise Financial Inc | 413,033 | $13.3M | 0.00% | +413,033 | New |
| Agf Management Ltd | 365,376 | $11.8M | 0.06% | +365,376 | New |
| Sessa Capital IM, L.P. | 354,699 | $11.4M | 0.44% | +354,699 | New |
| BDF-Gestion | 18,124 | $11.1M | 1.19% | +18,124 | New |
| Madison Avenue Partners, LP | 383,218 | $11.1M | 1.03% | +383,218 | New |
| Thompson Siegel & Walmsley LLC | 342,242 | $11.0M | 0.17% | +342,242 | New |
| Royal Bank of Canada | 333,296 | $10.7M | 0.00% | +333,296 | New |
| Two Sigma Investments, LP | 321,096 | $10.4M | 0.02% | +321,096 | New |
| Envestnet Asset Management Inc | 318,115 | $10.1M | 0.00% | +318,115 | New |
| Swiss National Bank | 312,800 | $10.1M | 0.01% | +312,800 | New |
| Todd Asset Management LLC | 307,663 | $9.92M | 0.23% | +307,663 | New |
| American Century Companies Inc | 287,886 | $9.28M | 0.01% | +287,886 | New |
| Colony Group, LLC | 275,140 | $8.87M | 0.03% | +275,140 | New |
| Wells Fargo & Company | 272,118 | $8.78M | 0.00% | +272,118 | New |
| California Public Employees Retirement System | 256,237 | $8.26M | 0.01% | +256,237 | New |
| SEI Investments Co | 243,716 | $7.86M | 0.01% | +243,716 | New |
| Williams Jones Wealth Management, LLC. | 223,803 | $7.22M | 0.08% | +223,803 | New |
| Rhumbline Advisers | 221,858 | $7.15M | 0.01% | +221,858 | New |
| California State Teachers Retirement System | 216,601 | $6.99M | 0.01% | +216,601 | New |
| Victory Capital Management Inc | 212,150 | $6.84M | 0.01% | +212,150 | New |
| Teachers Retirement System of the State of Kentucky | 212,085 | $6.84M | 0.06% | +212,085 | New |
| Waters Parkerson & Co., LLC | 203,578 | $6.57M | 0.33% | +203,578 | New |
| Natixis Advisors, L.P. | 200,665 | $6.47M | 0.01% | +200,665 | New |
| Korea Investment CORP | 197,972 | $6.38M | 0.02% | +197,972 | New |
| Campbell Newman Asset Management Inc | 193,208 | $6.23M | 0.47% | +193,208 | New |
| Canada Pension Plan Investment Board | 188,032 | $6.06M | 0.01% | +188,032 | New |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 187,975 | $6.06M | 0.01% | +187,975 | New |
| Mesirow Financial Investment Management, Inc. | 185,990 | $6.00M | 0.12% | +185,990 | New |
| Two Sigma Advisers, LP | 184,900 | $5.96M | 0.01% | +184,900 | New |
| Price T Rowe Associates Inc | 174,558 | $5.63M | 0.00% | +174,558 | New |
| Fort Baker Capital Management LP | 167,490 | $5.40M | 0.90% | +167,490 | New |
| HSBC Holdings PLC | 175,788 | $5.31M | 0.00% | +175,788 | New |
| Lazard Asset Management LLC | 204,047 | $5.24M | 0.01% | +204,047 | New |
| Barclays PLC | 159,813 | $5.15M | 0.00% | +159,813 | New |
| Hutchinson Capital Management | 148,572 | $4.79M | 0.91% | +148,572 | New |
| Northern Trust Corp | 148,513 | $4.79M | 0.00% | +148,513 | New |
| Principal Financial Group Inc | 145,574 | $4.69M | 0.00% | +145,574 | New |
| Alliancebernstein L.P. | 142,646 | $4.60M | 0.00% | +142,646 | New |
| Kovitz Investment Group Partners, LLC | 135,026 | $4.30M | 0.03% | +135,026 | New |
| State Board of Administration of Florida Retirement System | 132,514 | $4.27M | 0.01% | +132,514 | New |
| United Capital Financial Advisers, LLC | 130,560 | $4.21M | 0.03% | +130,560 | New |
| Washington Trust Advisors, Inc. | 128,198 | $4.13M | 0.36% | +128,198 | New |
| Lathrop Investment Management Corp | 127,169 | $4.10M | 0.76% | +127,169 | New |
| Tower Bridge Advisors | 125,662 | $4.05M | 0.42% | +125,662 | New |
| Wealth Enhancement Advisory Services, LLC | 121,080 | $3.90M | 0.01% | +121,080 | New |
| State of Tennessee, Treasury Department | 118,655 | $3.83M | 0.01% | +118,655 | New |
| Adage Capital Partners GP, L.L.C. | 118,027 | $3.81M | 0.01% | +118,027 | New |
| New York State Teachers Retirement System | 116,135 | $3.75M | 0.01% | +116,135 | New |
| La Banque Postale Asset Management SA | 115,535 | $3.73M | 0.06% | +115,535 | New |
| Citigroup Inc | 114,850 | $3.70M | 0.00% | +114,850 | New |
| State of Wisconsin Investment Board | 110,257 | $3.56M | 0.01% | +110,257 | New |
| F/M Investments LLC | 109,887 | $3.54M | 0.11% | +109,887 | New |
| Janus Henderson Group PLC | 117,059 | $3.50M | 0.00% | +117,059 | New |
| Mackenzie Financial Corp | 104,687 | $3.38M | 0.00% | +104,687 | New |
| LPL Financial LLC | 104,145 | $3.36M | 0.00% | +104,145 | New |
| Eastern Bank | 103,115 | $3.33M | 0.06% | +103,115 | New |
| Everett Harris & Co | 101,793 | $3.28M | 0.04% | +101,793 | New |
| Sterling Capital Management LLC | 93,230 | $3.01M | 0.04% | +93,230 | New |
| North Growth Management Ltd. | 93,000 | $3.00M | 0.56% | +93,000 | New |
| Neville Rodie & Shaw Inc | 89,977 | $2.90M | 0.21% | +89,977 | New |
| Telos Capital Management, Inc. | 88,292 | $2.85M | 0.30% | +88,292 | New |