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 2025
Institutional positions in Amentum Holdings, Inc. as of Sep 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
- 462
- +7 vs. Q2 2025
- Shares held
- 193.4M
- −4.76M (−2.4%) vs. Q2 2025
- Total value
- $4.63B
- −$48.2M (−1.0%) vs. Q2 2025
- New holders
- 76
- 104 more added
- Sold out
- 69
- 179 more reduced
6 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 170 | $4.07K | 0.00% | 00.0% | Unchanged |
| Geneos Wealth Management Inc. | 170 | $4.07K | 0.00% | +59+53.2% | Added |
| Farmers & Merchants Investments Inc | 176 | $4.21K | 0.00% | 00.0% | Unchanged |
| Medallion Wealth Advisors, LLC | 180 | $4.31K | 0.00% | 00.0% | Unchanged |
| Cromwell Holdings LLC | 184 | $4.41K | 0.00% | +13+7.6% | Added |
| Sachetta, LLC | 194 | $4.65K | 0.00% | 00.0% | Unchanged |
| Massmutual Trust Co FSB | 195 | $4.67K | 0.00% | 00.0% | Unchanged |
| Bellevue Asset Management, LLC | 197 | $4.72K | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 197 | $4.72K | 0.00% | −71−26.5% | Reduced |
| Walleye Capital LLC | 200 | $4.79K | 0.00% | +200 | New |
| Old Second National Bank of Aurora | 212 | $5.08K | 0.00% | 00.0% | Unchanged |
| Perkins Coie Trust Co | 219 | $5.24K | 0.00% | 00.0% | Unchanged |
| Financial Management Professionals, Inc. | 228 | $5.46K | 0.00% | 00.0% | Unchanged |
| DT Investment Partners, LLC | 230 | $5.51K | 0.00% | 00.0% | Unchanged |
| Glen Eagle Advisors, LLC | 232 | $5.56K | 0.00% | −54−18.9% | Reduced |
| Thurston, Springer, Miller, Herd & Titak, Inc. | 265 | $6.35K | 0.01% | −884−76.9% | Reduced |
| Oakworth Capital, Inc. | 271 | $6.49K | 0.00% | 00.0% | Unchanged |
| Steigerwald, Gordon & Koch Inc. | 272 | $6.51K | 0.00% | +272 | New |
| Golden State Wealth Management, LLC | 272 | $6.51K | 0.00% | +106+63.9% | Added |
| Larson Financial Group LLC | 283 | $6.78K | 0.00% | −7−2.4% | Reduced |
| Rossby Financial, LCC | 288 | $7.25K | 0.00% | 00.0% | Unchanged |
| CoreCap Advisors, LLC | 308 | $7.38K | 0.00% | −14−4.3% | Reduced |
| Moisand Fitzgerald Tamayo, LLC | 314 | $7.52K | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 326 | $7.81K | 0.00% | +37+12.8% | Added |
| LRI Investments, LLC | 332 | $7.95K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 342 | $8.19K | 0.00% | +168+96.6% | Added |
| Winch Advisory Services, LLC | 365 | $8.74K | 0.00% | 00.0% | Unchanged |
| Chesapeake Asset Management LLC | 369 | $8.84K | 0.01% | 00.0% | Unchanged |
| Optimum Investment Advisors | 372 | $8.91K | 0.00% | 00.0% | Unchanged |
| Murphy & Mullick Capital Management Corp | 376 | $9.01K | 0.01% | 00.0% | Unchanged |
| Macquarie Group Ltd | 381 | $9.13K | 0.00% | −240−38.6% | Reduced |
| Covestor Ltd | 409 | $10.0K | 0.01% | −4−1.0% | Reduced |
| Natixis | 423 | $10.1K | 0.00% | +423 | New |
| BankPlus Trust Department | 444 | $10.6K | 0.00% | −34−7.1% | Reduced |
| Colonial Trust Advisors | 483 | $11.6K | 0.00% | +110+29.5% | Added |
| Bartlett & Co. Wealth Management LLC | 484 | $11.6K | 0.00% | 00.0% | Unchanged |
| Global Wealth Strategies & Associates | 493 | $11.8K | 0.00% | 00.0% | Unchanged |
| Mendota Financial Group, LLC | 515 | $12.3K | 0.01% | 00.0% | Unchanged |
| Y.D. More Investments Ltd | 520 | $12.5K | 0.00% | −259−33.2% | Reduced |
| N.E.W. Advisory Services LLC | 542 | $13.0K | 0.00% | 00.0% | Unchanged |
| Parvin Asset Management, LLC | 543 | $13.0K | 0.01% | +250+85.3% | Added |
| Steward Partners Investment Advisory, LLC | 556 | $13.3K | 0.00% | −654−54.0% | Reduced |
| Private Trust Co NA | 566 | $13.6K | 0.00% | +8+1.4% | Added |
| Parkside Financial Bank & Trust | 589 | $14.1K | 0.00% | +141+31.5% | Added |
| GWM Advisors LLC | 601 | $14.4K | 0.00% | −3−0.5% | Reduced |
| TD Waterhouse Canada Inc. | 579 | $14.6K | 0.00% | +5+0.9% | Added |
| Quarry LP | 666 | $16.0K | 0.00% | −3,671−84.6% | Reduced |
| Evolution Advisers, Inc. | 636 | $16.0K | 0.01% | 00.0% | Unchanged |
| Pinnacle Bancorp, Inc. | 684 | $16.4K | 0.00% | −486−41.5% | Reduced |
| First Command Advisory Services, Inc. | 695 | $16.6K | 0.00% | 00.0% | Unchanged |
| West Oak Capital, LLC | 696 | $16.7K | 0.01% | −66−8.7% | Reduced |
| Salomon & Ludwin, LLC | 657 | $17.0K | 0.00% | +657 | New |
| Chung Wu Investment Group, LLC | 744 | $17.8K | 0.01% | −9,000−92.4% | Reduced |
| Tower Research Capital LLC (TRC) | 778 | $18.6K | 0.00% | −3,575−82.1% | Reduced |
| Root Financial Partners, LLC | 793 | $19.0K | 0.00% | +793 | New |
| BDF-Gestion | 803 | $19.2K | 0.00% | −168−17.3% | Reduced |
| Strategic Wealth Partners, Ltd. | 819 | $19.6K | 0.00% | 00.0% | Unchanged |
| Quent Capital, LLC | 825 | $19.8K | 0.00% | +825 | New |
| Clearstead Advisors, LLC | 917 | $22.0K | 0.00% | −3−0.3% | Reduced |
| Sound Income Strategies, LLC | 938 | $22.4K | 0.00% | +938 | New |
| Northwestern Mutual Wealth Management Co | 1,029 | $24.6K | 0.00% | +72+7.5% | Added |
| Spire Wealth Management | 1,134 | $27.2K | 0.00% | +263+30.2% | Added |
| Korea Investment CORP | 1,166 | $27.9K | 0.00% | −2,820−70.7% | Reduced |
| Whittier Trust Co of Nevada Inc | 1,081 | $28.1K | 0.00% | 00.0% | Unchanged |
| Ronald Blue Trust, Inc. | 1,204 | $28.8K | 0.00% | +648+116.5% | Added |
| Brown Brothers Harriman & Co | 1,208 | $28.9K | 0.00% | 00.0% | Unchanged |
| HM Payson & Co | 1,226 | $29.4K | 0.00% | 00.0% | Unchanged |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1,310 | $31.0K | 0.00% | −97−6.9% | Reduced |
| Mather Group, LLC. | 1,349 | $32.3K | 0.00% | +1,349 | New |
| EverSource Wealth Advisors, LLC | 1,372 | $32.9K | 0.00% | −148−9.7% | Reduced |
| National Bank of Canada | 1,378 | $33.3K | 0.00% | −390−22.1% | Reduced |
| Global Retirement Partners, LLC | 1,406 | $33.7K | 0.00% | −11−0.8% | Reduced |
| Nomura Asset Management Co Ltd | 1,449 | $34.7K | 0.00% | −65−4.3% | Reduced |
| Atlantic Union Bankshares Corp | 1,475 | $35.3K | 0.00% | +400+37.2% | Added |
| Central Trust Co | 1,534 | $36.7K | 0.00% | −418−21.4% | Reduced |
| Wealthspire Advisors, LLC | 1,734 | $41.5K | 0.00% | +1,734 | New |
| Asset Planning,Inc | 1,793 | $42.9K | 0.03% | 00.0% | Unchanged |
| Bessemer Group Inc | 1,821 | $44.0K | 0.00% | +341+23.0% | Added |
| Federation des caisses Desjardins du Quebec | 1,845 | $44.2K | 0.00% | −334−15.3% | Reduced |
| Heartwood Wealth Advisors LLC | 1,892 | $45.3K | 0.00% | +1,892 | New |
| Vermillion & White Wealth Management Group, LLC | 1,905 | $45.6K | 0.03% | +1,905 | New |
| Plante Moran Financial Advisors, LLC | 1,990 | $47.7K | 0.00% | 00.0% | Unchanged |
| Smartleaf Asset Management LLC | 2,142 | $48.9K | 0.00% | +328+18.1% | Added |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 2,174 | $50.4K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 2,198 | $52.6K | 0.00% | −43−1.9% | Reduced |
| Fifth Third Bancorp | 2,340 | $56.0K | 0.00% | +16+0.7% | Added |
| FNY Investment Advisers, LLC | 2,400 | $57.0K | 0.02% | 00.0% | Unchanged |
| Point72 Hong Kong Ltd | 2,469 | $59.1K | 0.00% | +2,469 | New |
| Advisory Services Network, LLC | 2,542 | $60.9K | 0.00% | +2,542 | New |
| MetLife Investment Management | 2,655 | $63.6K | 0.00% | +2,655 | New |
| State of Wyoming | 2,796 | $67.0K | 0.01% | +38+1.4% | Added |
| Farther Finance Advisors, LLC | 2,892 | $69.3K | 0.00% | +44+1.5% | Added |
| Aster Capital Management (DIFC) Ltd | 2,931 | $70.2K | 0.04% | +2,931 | New |
| STRS Ohio | 3,807 | $91.2K | 0.00% | +2+0.1% | Added |
| MAI Capital Management | 3,890 | $93.2K | 0.00% | −369−8.7% | Reduced |
| Essential Partners LLC | 3,999 | $95.8K | 0.03% | −43−1.1% | Reduced |
| Parallel Advisors, LLC | 4,164 | $99.7K | 0.00% | −16−0.4% | Reduced |
| Umb Bank N A | 4,168 | $99.8K | 0.00% | +47+1.1% | Added |
| Whittier Trust Co | 3,999 | $103.8K | 0.00% | +2+0.1% | Added |
| GAMMA Investing LLC | 5,021 | $120.3K | 0.01% | +578+13.0% | Added |