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 |
|---|---|---|---|---|---|
| Northwestern Mutual Wealth Management Co | 1,029 | $24.6K | 0.00% | +72+7.5% | Added |
| Sound Income Strategies, LLC | 938 | $22.4K | 0.00% | +938 | New |
| Clearstead Advisors, LLC | 917 | $22.0K | 0.00% | −3−0.3% | Reduced |
| Quent Capital, LLC | 825 | $19.8K | 0.00% | +825 | New |
| Strategic Wealth Partners, Ltd. | 819 | $19.6K | 0.00% | 00.0% | Unchanged |
| BDF-Gestion | 803 | $19.2K | 0.00% | −168−17.3% | Reduced |
| Root Financial Partners, LLC | 793 | $19.0K | 0.00% | +793 | New |
| Tower Research Capital LLC (TRC) | 778 | $18.6K | 0.00% | −3,575−82.1% | Reduced |
| Chung Wu Investment Group, LLC | 744 | $17.8K | 0.01% | −9,000−92.4% | Reduced |
| Salomon & Ludwin, LLC | 657 | $17.0K | 0.00% | +657 | New |
| West Oak Capital, LLC | 696 | $16.7K | 0.01% | −66−8.7% | Reduced |
| First Command Advisory Services, Inc. | 695 | $16.6K | 0.00% | 00.0% | Unchanged |
| Pinnacle Bancorp, Inc. | 684 | $16.4K | 0.00% | −486−41.5% | Reduced |
| Evolution Advisers, Inc. | 636 | $16.0K | 0.01% | 00.0% | Unchanged |
| Quarry LP | 666 | $16.0K | 0.00% | −3,671−84.6% | Reduced |
| TD Waterhouse Canada Inc. | 579 | $14.6K | 0.00% | +5+0.9% | Added |
| GWM Advisors LLC | 601 | $14.4K | 0.00% | −3−0.5% | Reduced |
| Parkside Financial Bank & Trust | 589 | $14.1K | 0.00% | +141+31.5% | Added |
| Private Trust Co NA | 566 | $13.6K | 0.00% | +8+1.4% | Added |
| Steward Partners Investment Advisory, LLC | 556 | $13.3K | 0.00% | −654−54.0% | Reduced |
| Parvin Asset Management, LLC | 543 | $13.0K | 0.01% | +250+85.3% | Added |
| N.E.W. Advisory Services LLC | 542 | $13.0K | 0.00% | 00.0% | Unchanged |
| Y.D. More Investments Ltd | 520 | $12.5K | 0.00% | −259−33.2% | Reduced |
| Mendota Financial Group, LLC | 515 | $12.3K | 0.01% | 00.0% | Unchanged |
| Global Wealth Strategies & Associates | 493 | $11.8K | 0.00% | 00.0% | Unchanged |
| Bartlett & Co. Wealth Management LLC | 484 | $11.6K | 0.00% | 00.0% | Unchanged |
| Colonial Trust Advisors | 483 | $11.6K | 0.00% | +110+29.5% | Added |
| BankPlus Trust Department | 444 | $10.6K | 0.00% | −34−7.1% | Reduced |
| Natixis | 423 | $10.1K | 0.00% | +423 | New |
| Covestor Ltd | 409 | $10.0K | 0.01% | −4−1.0% | Reduced |
| Macquarie Group Ltd | 381 | $9.13K | 0.00% | −240−38.6% | Reduced |
| Murphy & Mullick Capital Management Corp | 376 | $9.01K | 0.01% | 00.0% | Unchanged |
| Optimum Investment Advisors | 372 | $8.91K | 0.00% | 00.0% | Unchanged |
| Chesapeake Asset Management LLC | 369 | $8.84K | 0.01% | 00.0% | Unchanged |
| Winch Advisory Services, LLC | 365 | $8.74K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 342 | $8.19K | 0.00% | +168+96.6% | Added |
| LRI Investments, LLC | 332 | $7.95K | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 326 | $7.81K | 0.00% | +37+12.8% | Added |
| Moisand Fitzgerald Tamayo, LLC | 314 | $7.52K | 0.00% | 00.0% | Unchanged |
| CoreCap Advisors, LLC | 308 | $7.38K | 0.00% | −14−4.3% | Reduced |
| Rossby Financial, LCC | 288 | $7.25K | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 283 | $6.78K | 0.00% | −7−2.4% | Reduced |
| Golden State Wealth Management, LLC | 272 | $6.51K | 0.00% | +106+63.9% | Added |
| Steigerwald, Gordon & Koch Inc. | 272 | $6.51K | 0.00% | +272 | New |
| Oakworth Capital, Inc. | 271 | $6.49K | 0.00% | 00.0% | Unchanged |
| Thurston, Springer, Miller, Herd & Titak, Inc. | 265 | $6.35K | 0.01% | −884−76.9% | Reduced |
| Glen Eagle Advisors, LLC | 232 | $5.56K | 0.00% | −54−18.9% | Reduced |
| DT Investment Partners, LLC | 230 | $5.51K | 0.00% | 00.0% | Unchanged |
| Financial Management Professionals, Inc. | 228 | $5.46K | 0.00% | 00.0% | Unchanged |
| Perkins Coie Trust Co | 219 | $5.24K | 0.00% | 00.0% | Unchanged |
| Old Second National Bank of Aurora | 212 | $5.08K | 0.00% | 00.0% | Unchanged |
| Walleye Capital LLC | 200 | $4.79K | 0.00% | +200 | New |
| Huntington National Bank | 197 | $4.72K | 0.00% | −71−26.5% | Reduced |
| Bellevue Asset Management, LLC | 197 | $4.72K | 0.00% | 00.0% | Unchanged |
| Massmutual Trust Co FSB | 195 | $4.67K | 0.00% | 00.0% | Unchanged |
| Sachetta, LLC | 194 | $4.65K | 0.00% | 00.0% | Unchanged |
| Cromwell Holdings LLC | 184 | $4.41K | 0.00% | +13+7.6% | Added |
| Medallion Wealth Advisors, LLC | 180 | $4.31K | 0.00% | 00.0% | Unchanged |
| Farmers & Merchants Investments Inc | 176 | $4.21K | 0.00% | 00.0% | Unchanged |
| 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 |
| Harbor Capital Advisors, Inc. | 170 | $4.00K | 0.00% | 00.0% | Unchanged |
| Atlantic Edge Private Wealth Management, LLC | 164 | $3.93K | 0.00% | 00.0% | Unchanged |
| TD Private Client Wealth LLC | 145 | $3.47K | 0.00% | −21−12.7% | Reduced |
| Ramirez Asset Management, Inc. | 142 | $3.40K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 140 | $3.35K | 0.00% | −1−0.7% | Reduced |
| Cullen/Frost Bankers, Inc. | 137 | $3.28K | 0.00% | +102+291.4% | Added |
| McIlrath & Eck, LLC | 136 | $3.26K | 0.00% | 00.0% | Unchanged |
| GPS Wealth Strategies Group, LLC | 133 | $3.19K | 0.00% | −10−7.0% | Reduced |
| ORG Partners LLC | 130 | $3.11K | 0.00% | 00.0% | Unchanged |
| Hemington Wealth Management | 135 | $3.00K | 0.00% | 00.0% | Unchanged |
| Bank of Jackson Hole Trust | 122 | $2.92K | 0.00% | −189−60.8% | Reduced |
| Roxbury Financial LLC | 118 | $2.83K | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 116 | $2.78K | 0.00% | +49+73.1% | Added |
| Grove Bank & Trust | 108 | $2.59K | 0.00% | 00.0% | Unchanged |
| Godsey & Gibb Associates | 106 | $2.54K | 0.00% | 00.0% | Unchanged |
| Harbor Investment Advisory, LLC | 106 | $2.54K | 0.00% | 00.0% | Unchanged |
| Private Wealth Management Group, LLC | 106 | $2.54K | 0.00% | 00.0% | Unchanged |
| TruNorth Capital Management, LLC | 106 | $2.54K | 0.00% | +106 | New |
| Crews Bank & Trust | 100 | $2.40K | 0.00% | −803−88.9% | Reduced |
| Evermay Wealth Management LLC | 99 | $2.37K | 0.00% | 00.0% | Unchanged |
| Rosenberg Matthew Hamilton | 99 | $2.37K | 0.00% | 00.0% | Unchanged |
| Hilltop National Bank | 98 | $2.35K | 0.00% | 00.0% | Unchanged |
| Wiser Advisor Group LLC | 92 | $2.21K | 0.00% | +92 | New |
| Asset Dedication, LLC | 92 | $2.20K | 0.00% | 00.0% | Unchanged |
| Ameritas Advisory Services, LLC | 88 | $2.11K | 0.00% | +88 | New |
| Anchor Investment Management, LLC | 87 | $2.08K | 0.00% | 00.0% | Unchanged |
| Capital Analysts, LLC | 78 | $2.00K | 0.00% | 00.0% | Unchanged |
| Centerpoint Advisors, LLC | 69 | $2.00K | 0.00% | 00.0% | Unchanged |
| Aventus Investment Advisors, Inc. | 81 | $1.94K | 0.00% | −2−2.4% | Reduced |
| First Financial Corp | 79 | $1.89K | 0.00% | 00.0% | Unchanged |
| Minot DeBlois Advisors LLC | 79 | $1.89K | 0.00% | 00.0% | Unchanged |
| Rakuten Securities, Inc. | 74 | $1.77K | 0.00% | −234−76.0% | Reduced |
| True Wealth Design, LLC | 66 | $1.58K | 0.00% | 00.0% | Unchanged |
| Hughes Financial Services, LLC | 68 | $1.55K | 0.00% | 00.0% | Unchanged |
| High Note Wealth, LLC | 63 | $1.51K | 0.00% | 00.0% | Unchanged |
| Bell Investment Advisors, Inc | 60 | $1.44K | 0.00% | −29−32.6% | Reduced |
| Eastern Bank | 59 | $1.41K | 0.00% | −9−13.2% | Reduced |
| Brown, Lisle/Cummings, Inc. | 53 | $1.27K | 0.00% | 00.0% | Unchanged |
| Towarzystwo Funduszy Inwestycyjnych Pzu SA | 53 | $1.27K | 0.00% | 00.0% | Unchanged |