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, Q2 2025
Institutional positions in Amentum Holdings, Inc. as of Jun 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
- 461
- +48 vs. Q1 2025
- Shares held
- 200.3M
- +8.87M (+4.6%) vs. Q1 2025
- Total value
- $4.73B
- +$1.25B (+35.7%) vs. Q1 2025
- New holders
- 113
- 233 more added
- Sold out
- 65
- 100 more reduced
5 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Security National Bank of So Dak | 26,840 | $633.7K | 0.35% | +2,016+8.1% | Added |
| Lathrop Investment Management Corp | 27,811 | $657.0K | 0.12% | −12,713−31.4% | Reduced |
| Stephens Inc | 27,900 | $658.7K | 0.01% | −4,829−14.8% | Reduced |
| Oak Thistle LLC | 28,230 | $666.5K | 0.10% | +28,230 | New |
| Clifford Swan Investment Counsel LLC | 28,576 | $674.7K | 0.02% | −54−0.2% | Reduced |
| Neville Rodie & Shaw Inc | 29,442 | $695.0K | 0.05% | −23,901−44.8% | Reduced |
| Jones Financial Companies LLLP | 30,156 | $708.0K | 0.00% | +2,562+9.3% | Added |
| Captrust Financial Advisors | 30,815 | $727.5K | 0.00% | +10,200+49.5% | Added |
| Stifel Financial Corp | 33,005 | $779.3K | 0.00% | +19,767+149.3% | Added |
| American Trust Investment Advisors, LLC | 33,252 | $785.1K | 0.40% | −2,436−6.8% | Reduced |
| Nisa Investment Advisors, LLC | 33,630 | $794.0K | 0.00% | +3,143+10.3% | Added |
| Victory Capital Management Inc | 33,708 | $795.8K | 0.00% | +3,849+12.9% | Added |
| National Philanthropic Trust | 33,827 | $798.7K | 0.01% | +806+2.4% | Added |
| Creative Planning | 34,301 | $809.9K | 0.00% | +15,114+78.8% | Added |
| Oregon Public Employees Retirement Fund | 34,400 | $812.2K | 0.01% | +1,600+4.9% | Added |
| Highland Capital Management Fund Advisors, L.P. | 35,263 | $832.6K | 0.08% | −8,637−19.7% | Reduced |
| Tower Bridge Advisors | 36,058 | $851.3K | 0.09% | −2,830−7.3% | Reduced |
| Manufacturers Life Insurance Company, The | 36,363 | $858.5K | 0.00% | −1,157−3.1% | Reduced |
| Colony Group, LLC | 36,934 | $872.0K | 0.00% | +13,175+55.5% | Added |
| Fortress Investment Group LLC | 38,106 | $899.7K | 0.13% | +31,819+506.1% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 38,732 | $914.5K | 0.00% | +4,380+12.8% | Added |
| Clear Harbor Asset Management, LLC | 40,053 | $945.7K | 0.07% | −490−1.2% | Reduced |
| Wells Fargo & Company | 40,206 | $949.3K | 0.00% | −10,246−20.3% | Reduced |
| Ensign Peak Advisors, Inc | 40,586 | $958.2K | 0.00% | +2,326+6.1% | Added |
| Bank of Montreal | 40,669 | $960.2K | 0.00% | +5,210+14.7% | Added |
| Mariner, LLC | 42,989 | $1.01M | 0.00% | +11,260+35.5% | Added |
| Pine Valley Investments Ltd Liability Co | 44,618 | $1.05M | 0.06% | +4,798+12.0% | Added |
| Cerity Partners LLC | 45,116 | $1.07M | 0.00% | +6,312+16.3% | Added |
| Advisors Asset Management, Inc. | 45,183 | $1.07M | 0.02% | −11,419−20.2% | Reduced |
| Hikari Tsushin, Inc. | 45,403 | $1.07M | 0.08% | +2,603+6.1% | Added |
| Amalgamated Bank | 45,835 | $1.08M | 0.01% | +2,469+5.7% | Added |
| Arizona State Retirement System | 46,153 | $1.09M | 0.01% | +7,768+20.2% | Added |
| Susquehanna International Group, LLP | 46,707 | $1.10M | 0.00% | −486,860−91.2% | Reduced |
| Williams Jones Wealth Management, LLC. | 47,660 | $1.13M | 0.01% | +9,550+25.1% | Added |
| CI Private Wealth, LLC | 48,384 | $1.14M | 0.00% | +5,148+11.9% | Added |
| Paragon Capital Management LLC | 48,710 | $1.15M | 0.59% | +638+1.3% | Added |
| Barclays PLC | 49,239 | $1.16M | 0.00% | −6,265−11.3% | Reduced |
| Marex Group plc | 50,000 | $1.18M | 0.02% | +50,000 | New |
| Public Employees Retirement System of Ohio | 51,304 | $1.21M | 0.00% | +3,688+7.7% | Added |
| Teachers Retirement System of the State of Kentucky | 51,336 | $1.21M | 0.01% | −4,480−8.0% | Reduced |
| Hyperion Capital Advisors LP | 51,487 | $1.22M | 0.76% | +32,901+177.0% | Added |
| Quantinno Capital Management LP | 51,543 | $1.22M | 0.01% | +10,333+25.1% | Added |
| Maryland State Retirement & Pension System | 51,806 | $1.22M | 0.03% | +2,784+5.7% | Added |
| Blair William & Co | 56,568 | $1.34M | 0.00% | +2,368+4.4% | Added |
| Yousif Capital Management, LLC | 56,966 | $1.34M | 0.01% | +10,526+22.7% | Added |
| Neuberger Berman Group LLC | 58,800 | $1.39M | 0.00% | +42,647+264.0% | Added |
| Police & Firemen's Retirement System of New Jersey | 60,391 | $1.43M | 0.01% | +37,269+161.2% | Added |
| Coastal Bridge Advisors, LLC | 60,413 | $1.43M | 0.12% | +60,413 | New |
| Wellington Management Group LLP | 60,778 | $1.43M | 0.00% | +60,778 | New |
| Versor Investments LP | 62,022 | $1.46M | 0.26% | +22,622+57.4% | Added |
| State of Tennessee, Treasury Department | 62,654 | $1.48M | 0.01% | −12,914−17.1% | Reduced |
| XTX Topco Ltd | 64,723 | $1.53M | 0.06% | +64,723 | New |
| Teacher Retirement System of Texas | 64,845 | $1.53M | 0.01% | +675+1.1% | Added |
| Natixis Advisors, L.P. | 67,077 | $1.58M | 0.00% | +10,219+18.0% | Added |
| Group One Trading, L.P. | 67,908 | $1.60M | 0.05% | −36,776−35.1% | Reduced |
| Wolverine Asset Management LLC | 68,040 | $1.61M | 0.03% | +34,800+104.7% | Added |
| Hahn Capital Management LLC | 68,748 | $1.62M | 0.77% | +3,115+4.7% | Added |
| Janus Henderson Group PLC | 69,400 | $1.64M | 0.00% | −61,600−47.0% | Reduced |
| Louisiana State Employees Retirement System | 70,500 | $1.66M | 0.03% | +12,100+20.7% | Added |
| WSFS Capital Management, LLC | 72,728 | $1.72M | 0.09% | +10,356+16.6% | Added |
| Treasurer of the State of North Carolina | 74,368 | $1.76M | 0.01% | +6,585+9.7% | Added |
| Marshall Wace, LLP | 74,831 | $1.77M | 0.00% | −72,521−49.2% | Reduced |
| Alpine Global Management, LLC | 75,056 | $1.77M | 0.40% | −24,944−24.9% | Reduced |
| Illinois Municipal Retirement Fund | 75,452 | $1.78M | 0.02% | +8,945+13.4% | Added |
| Crestwood Advisors Group LLC | 81,774 | $1.93M | 0.03% | +1,215+1.5% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 83,769 | $1.98M | 0.00% | +62,304+290.3% | Added |
| State of Alaska, Department of Revenue | 89,832 | $2.12M | 0.02% | +10,487+13.2% | Added |
| LPL Financial LLC | 90,733 | $2.14M | 0.00% | −2,289−2.5% | Reduced |
| JPMorgan Chase & Co | 91,322 | $2.16M | 0.00% | +3,608+4.1% | Added |
| State of Wisconsin Investment Board | 91,857 | $2.17M | 0.01% | −3,857−4.0% | Reduced |
| Verition Fund Management LLC | 92,481 | $2.18M | 0.01% | −198,225−68.2% | Reduced |
| Envestnet Asset Management Inc | 96,785 | $2.29M | 0.00% | −403−0.4% | Reduced |
| North Growth Management Ltd. | 97,000 | $2.30M | 0.43% | +5,000+5.4% | Added |
| State of New Jersey Common Pension Fund D | 100,104 | $2.36M | 0.01% | +2,451+2.5% | Added |
| RFG Advisory, LLC | 102,171 | $2.41M | 0.06% | +102,171 | New |
| Price T Rowe Associates Inc | 106,147 | $2.51M | 0.00% | +18,046+20.5% | Added |
| Nomura Holdings Inc | 108,212 | $2.55M | 0.02% | +18,269+20.3% | Added |
| Gamco Investors, Inc. Et Al | 108,670 | $2.57M | 0.03% | +108,670 | New |
| Soviero Asset Management, LP | 110,000 | $2.60M | 1.90% | +110,000 | New |
| Winton Group Ltd | 112,421 | $2.65M | 0.14% | −4,259−3.7% | Reduced |
| State Board of Administration of Florida Retirement System | 122,366 | $2.89M | 0.01% | +7,730+6.7% | Added |
| CenterBook Partners LP | 125,340 | $2.96M | 0.16% | −289,234−69.8% | Reduced |
| Citigroup Inc | 129,864 | $3.07M | 0.00% | +12,055+10.2% | Added |
| Ancora Advisors, LLC | 132,204 | $3.12M | 0.07% | +63,434+92.2% | Added |
| New York State Teachers Retirement System | 137,435 | $3.25M | 0.01% | −1,051−0.8% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 155,104 | $3.76M | 0.01% | +3,303+2.2% | Added |
| Prudential Financial Inc | 150,008 | $3.77M | 0.00% | +12,254+8.9% | Added |
| California State Teachers Retirement System | 162,297 | $3.83M | 0.00% | +31,123+23.7% | Added |
| AWH Capital, L.P. | 165,250 | $3.90M | 4.55% | +122,750+288.8% | Added |
| Country Club Bank | 172,318 | $4.04M | 0.25% | +78,566+83.8% | Added |
| Hudson Value Partners, LLC | 185,701 | $4.38M | 1.51% | −2,582−1.4% | Reduced |
| Raymond James Financial Inc | 189,810 | $4.48M | 0.00% | +9,238+5.1% | Added |
| Y-Intercept (Hong Kong) Ltd | 198,726 | $4.69M | 0.11% | +198,726 | New |
| SEI Investments Co | 219,126 | $5.17M | 0.01% | +16,976+8.4% | Added |
| Telos Capital Management, Inc. | 220,718 | $5.21M | 0.53% | −35,460−13.8% | Reduced |
| California Public Employees Retirement System | 228,921 | $5.40M | 0.00% | +41,073+21.9% | Added |
| Goldman Sachs Group Inc | 238,247 | $5.63M | 0.00% | −209,331−46.8% | Reduced |
| Arosa Capital Management LP | 252,500 | $5.96M | 4.35% | −154,400−37.9% | Reduced |
| Grizzlyrock Capital, LLC | 253,363 | $5.98M | 4.50% | +89,137+54.3% | Added |
| Rhumbline Advisers | 287,247 | $6.78M | 0.01% | −22,856−7.4% | Reduced |