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 |
|---|---|---|---|---|---|
| American Securities LLC | 43,893,904 | $923.1M | 100.00% | +43,893,904 | New |
| BlackRock, Inc. | 16,774,771 | $352.8M | 0.01% | +7,857,343+88.1% | Added |
| Vanguard Group Inc | 16,542,447 | $347.9M | 0.01% | +2,529,173+18.0% | Added |
| Invesco Ltd. | 13,856,239 | $291.4M | 0.05% | +6,055,638+77.6% | Added |
| State Street Corp | 6,454,253 | $135.7M | 0.01% | −873,055−11.9% | Reduced |
| Primecap Management Co | 6,414,379 | $134.9M | 0.10% | +1,143,097+21.7% | Added |
| Cooper Creek Partners Management LLC | 4,157,034 | $87.4M | 2.70% | +3,319,364+396.3% | Added |
| Kovitz Investment Group Partners, LLC | 3,152,262 | $66.3M | 0.33% | +3,017,236+2,234.6% | Added |
| Allspring Global Investments Holdings, LLC | 2,420,967 | $52.4M | 0.08% | −10,008−0.4% | Reduced |
| Ruane, Cunniff & Goldfarb L.P. | 2,436,294 | $51.2M | 0.87% | −94,195−3.7% | Reduced |
| FMR LLC | 2,395,053 | $50.4M | 0.00% | +2,315,738+2,919.7% | Added |
| Wellington Management Group LLP | 2,333,221 | $49.1M | 0.01% | +1,398,143+149.5% | Added |
| Geode Capital Management, LLC | 1,963,248 | $41.3M | 0.00% | −1,182,016−37.6% | Reduced |
| Thompson Siegel & Walmsley LLC | 1,948,684 | $41.0M | 0.64% | +1,606,442+469.4% | Added |
| FIL Ltd | 1,793,553 | $37.7M | 0.04% | +1,058,441+144.0% | Added |
| Thrivent Financial for Lutherans | 1,611,796 | $33.9M | 0.07% | +1,076,375+201.0% | Added |
| Morgan Stanley | 1,482,521 | $31.2M | 0.00% | +455,572+44.4% | Added |
| Norges Bank | 1,440,127 | $30.3M | 0.00% | +1,440,127 | New |
| Charles Schwab Investment Management Inc | 1,264,257 | $26.6M | 0.00% | +503,741+66.2% | Added |
| Millennium Management LLC | 1,196,574 | $25.2M | 0.02% | +524,807+78.1% | Added |
| Dimensional Fund Advisors LP | 1,154,130 | $24.3M | 0.01% | −105,218−8.4% | Reduced |
| Van Eck Associates Corp | 1,132,285 | $23.8M | 0.03% | +1,132,285 | New |
| UBS Group AG | 1,131,744 | $23.8M | 0.01% | +705,180+165.3% | Added |
| Castalian Partners, LLC | 1,000,000 | $21.0M | 19.87% | +1,000,000 | New |
| Arvin Capital Management LP | 965,197 | $20.3M | 8.15% | +965,197 | New |
| Susquehanna International Group, LLP | 876,361 | $18.4M | 0.03% | +827,362+1,688.5% | Added |
| Cacti Asset Management LLC | 824,464 | $18.4M | 1.42% | +824,464 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 869,596 | $18.3M | 0.04% | +37,571+4.5% | Added |
| Northern Trust Corp | 842,219 | $17.7M | 0.00% | +693,706+467.1% | Added |
| Kopernik Global Investors, LLC | 765,982 | $16.1M | 1.72% | +765,982 | New |
| Legal & General Group Plc | 678,103 | $14.3M | 0.00% | +18,403+2.8% | Added |
| Bank of New York Mellon Corp | 651,314 | $13.7M | 0.00% | −123,740−16.0% | Reduced |
| Ci Investments Inc. | 643,115 | $13.5M | 0.05% | −330,742−34.0% | Reduced |
| CSM Advisors, LLC | 639,057 | $13.4M | 0.63% | +553,435+646.4% | Added |
| Engine Capital Management, LP | 621,400 | $13.1M | 2.39% | +621,400 | New |
| Royal Bank of Canada | 618,903 | $13.0M | 0.00% | +285,607+85.7% | Added |
| Bank of America Corp | 608,845 | $12.8M | 0.00% | −1,064,410−63.6% | Reduced |
| Principal Financial Group Inc | 602,049 | $12.7M | 0.01% | +456,475+313.6% | Added |
| Moore Capital Management, LP | 592,190 | $12.5M | 0.23% | +592,190 | New |
| Aristotle Capital Boston, LLC | 476,977 | $10.0M | 0.37% | +431,299+944.2% | Added |
| Discovery Capital Management, LLC | 465,300 | $9.79M | 0.67% | +465,300 | New |
| Voss Capital, LLC | 449,818 | $9.46M | 0.70% | +449,818 | New |
| Penn Capital Management Co Inc | 446,308 | $9.39M | 0.92% | +446,308 | New |
| 683 Capital Management, LLC | 425,000 | $8.94M | 0.88% | +425,000 | New |
| Voya Investment Management LLC | 404,115 | $8.50M | 0.01% | +404,115 | New |
| Citadel Advisors LLC | 394,822 | $8.30M | 0.01% | −86,211−17.9% | Reduced |
| New York State Common Retirement Fund | 378,952 | $7.97M | 0.01% | +300,431+382.6% | Added |
| Ameriprise Financial Inc | 359,227 | $7.55M | 0.00% | −53,806−13.0% | Reduced |
| Arosa Capital Management LP | 350,000 | $7.36M | 4.84% | +350,000 | New |
| Citigroup Inc | 327,762 | $6.89M | 0.01% | +212,912+185.4% | Added |
| Verition Fund Management LLC | 320,916 | $6.75M | 0.03% | +320,916 | New |
| Public Sector Pension Investment Board | 309,186 | $6.50M | 0.03% | +309,186 | New |
| Nuveen Asset Management, LLC | 303,885 | $6.39M | 0.00% | −132,639−30.4% | Reduced |
| Rhumbline Advisers | 295,184 | $6.21M | 0.01% | +73,326+33.1% | Added |
| SEI Investments Co | 287,313 | $6.04M | 0.01% | +43,597+17.9% | Added |
| UBS Asset Management Americas Inc | 273,734 | $5.76M | 0.00% | −400,433−59.4% | Reduced |
| Goldman Sachs Group Inc | 272,225 | $5.72M | 0.00% | −510,580−65.2% | Reduced |
| Telos Capital Management, Inc. | 267,036 | $5.62M | 0.60% | +178,744+202.4% | Added |
| Swiss National Bank | 263,200 | $5.54M | 0.00% | −49,600−15.9% | Reduced |
| Simplex Trading, LLC | 219,981 | $4.63M | 0.13% | +219,981 | New |
| Colony Group, LLC | 201,344 | $4.23M | 0.01% | −73,796−26.8% | Reduced |
| California Public Employees Retirement System | 197,519 | $4.15M | 0.00% | −58,718−22.9% | Reduced |
| Avenir Corp | 193,470 | $4.07M | 0.42% | +193,470 | New |
| Mesirow Financial Investment Management, Inc. | 176,931 | $3.72M | 0.07% | −9,059−4.9% | Reduced |
| Barclays PLC | 169,651 | $3.57M | 0.00% | +9,838+6.2% | Added |
| Hutchinson Capital Management | 145,490 | $3.06M | 0.58% | −3,082−2.1% | Reduced |
| Jacobs Levy Equity Management, Inc | 145,471 | $3.06M | 0.01% | +63,072+76.5% | Added |
| California State Teachers Retirement System | 131,419 | $2.76M | 0.00% | −85,182−39.3% | Reduced |
| Point72 Asset Management, L.P. | 126,382 | $2.66M | 0.01% | +120,373+2,003.2% | Added |
| Russell Investments Group, Ltd. | 125,538 | $2.64M | 0.00% | +48,147+62.2% | Added |
| Pacific Capital Partners Ltd | 125,000 | $2.63M | 1.55% | +125,000 | New |
| New York State Teachers Retirement System | 124,122 | $2.61M | 0.01% | +7,987+6.9% | Added |
| Prudential Financial Inc | 122,574 | $2.58M | 0.00% | +43,829+55.7% | Added |
| HSBC Holdings PLC | 119,517 | $2.53M | 0.00% | −56,271−32.0% | Reduced |
| D. E. Shaw & Co., Inc. | 119,936 | $2.52M | 0.00% | +33,546+38.8% | Added |
| LPL Financial LLC | 118,782 | $2.50M | 0.00% | +14,637+14.1% | Added |
| Wealth Enhancement Advisory Services, LLC | 114,744 | $2.41M | 0.00% | −6,336−5.2% | Reduced |
| State Board of Administration of Florida Retirement System | 114,636 | $2.41M | 0.00% | −17,878−13.5% | Reduced |
| JPMorgan Chase & Co | 113,674 | $2.39M | 0.00% | −157,295−58.0% | Reduced |
| Envestnet Asset Management Inc | 112,223 | $2.36M | 0.00% | −205,892−64.7% | Reduced |
| Caption Management, LLC | 109,851 | $2.31M | 0.10% | +109,851 | New |
| Centiva Capital, LP | 104,140 | $2.19M | 0.08% | +104,140 | New |
| United Capital Financial Advisers, LLC | 102,313 | $2.15M | 0.02% | −28,247−21.6% | Reduced |
| Two Point Capital Management, Inc. | 88,129 | $2.08M | 0.74% | +88,129 | New |
| State of New Jersey Common Pension Fund D | 95,677 | $2.01M | 0.01% | +52,341+120.8% | Added |
| Tower Bridge Advisors | 93,732 | $1.97M | 0.21% | −31,930−25.4% | Reduced |
| Crestwood Advisors Group LLC | 93,522 | $1.97M | 0.04% | +13,451+16.8% | Added |
| North Growth Management Ltd. | 91,000 | $1.92M | 0.36% | −2,000−2.2% | Reduced |
| Cinctive Capital Management LP | 91,085 | $1.92M | 0.10% | +91,085 | New |
| XTX Topco Ltd | 90,065 | $1.89M | 0.16% | +82,673+1,118.4% | Added |
| Wells Fargo & Company | 89,561 | $1.88M | 0.00% | −182,557−67.1% | Reduced |
| Teacher Retirement System of Texas | 86,692 | $1.82M | 0.01% | +86,692 | New |
| Group One Trading, L.P. | 86,036 | $1.81M | 0.06% | +84,988+8,109.5% | Added |
| Raymond James Financial Inc | 85,562 | $1.80M | 0.00% | +85,562 | New |
| AQR Capital Management LLC | 84,357 | $1.77M | 0.00% | −554,969−86.8% | Reduced |
| Lathrop Investment Management Corp | 84,044 | $1.77M | 0.34% | −43,125−33.9% | Reduced |
| Neville Rodie & Shaw Inc | 80,999 | $1.70M | 0.12% | −8,978−10.0% | Reduced |
| Washington Trust Advisors, Inc. | 80,240 | $1.69M | 0.14% | −47,958−37.4% | Reduced |
| Hahn Capital Management LLC | 77,322 | $1.63M | 0.71% | +25,036+47.9% | Added |
| Cerity Partners LLC | 69,523 | $1.60M | 0.00% | −11,340−14.0% | Reduced |