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 |
|---|---|---|---|---|---|
| CIBC Private Wealth Group, LLC | 5,300 | $126.9K | 0.00% | +2,061+63.6% | Added |
| Rockefeller Capital Management L.P. | 5,691 | $136.3K | 0.00% | +5,691 | New |
| KBC Group NV | 6,126 | $147.0K | 0.00% | 00.0% | Unchanged |
| BOK Financial Private Wealth, Inc. | 7,088 | $169.8K | 0.01% | −2,279−24.3% | Reduced |
| SRS Capital Advisors, Inc. | 7,760 | $185.9K | 0.00% | +6,924+828.2% | Added |
| Smithfield Trust Co | 7,890 | $189.0K | 0.01% | 00.0% | Unchanged |
| Optiver Holding B.V. | 7,954 | $190.5K | 0.00% | +7,954 | New |
| CX Institutional | 8,075 | $193.0K | 0.01% | −141−1.7% | Reduced |
| Canada Pension Plan Investment Board | 8,094 | $193.9K | 0.00% | 00.0% | Unchanged |
| Washington Trust Advisors, Inc. | 8,263 | $197.9K | 0.02% | −2,116−20.4% | Reduced |
| Coastal Bridge Advisors, LLC | 8,505 | $203.7K | 0.02% | −51,908−85.9% | Reduced |
| M&T Bank Corp | 8,531 | $204.5K | 0.00% | −1,688−16.5% | Reduced |
| Aberdeen Wealth Management LLC | 8,643 | $207.0K | 0.13% | −848−8.9% | Reduced |
| PFG Investments, LLC | 8,702 | $208.4K | 0.01% | −2,581−22.9% | Reduced |
| Syon Capital LLC | 8,727 | $209.0K | 0.01% | −25−0.3% | Reduced |
| Badgley Phelps Wealth Managers, LLC | 8,971 | $214.9K | 0.00% | −3,903−30.3% | Reduced |
| ARS Investment Partners, LLC | 9,000 | $215.6K | 0.01% | +9,000 | New |
| Point72 Asia (Singapore) Pte. Ltd. | 9,181 | $219.9K | 0.03% | +4,602+100.5% | Added |
| FourThought Financial Partners, LLC | 9,379 | $224.6K | 0.02% | +9,379 | New |
| Shufro Rose & Co LLC | 12,554 | $228.5K | 0.02% | −80−0.6% | Reduced |
| Lido Advisors, LLC | 9,789 | $234.5K | 0.00% | −496−4.8% | Reduced |
| Sterling Capital Management LLC | 9,961 | $238.6K | 0.00% | −1,032−9.4% | Reduced |
| Allworth Financial LP | 10,054 | $240.8K | 0.00% | −202−2.0% | Reduced |
| Brown Advisory Inc | 10,151 | $243.1K | 0.00% | −457−4.3% | Reduced |
| Prelude Capital Management, LLC | 10,449 | $250.3K | 0.02% | +10,449 | New |
| Grantham, Mayo, Van Otterloo & Co. LLC | 10,457 | $250.4K | 0.00% | +10,457 | New |
| Advyzon Investment Management, LLC | 10,481 | $251.0K | 0.04% | +10,481 | New |
| Silvercrest Asset Management Group LLC | 10,636 | $254.7K | 0.00% | −17−0.2% | Reduced |
| ISAM Funds (UK) Ltd | 10,848 | $259.8K | 0.05% | +10,848 | New |
| Quantessence Capital LLC | 10,879 | $260.6K | 0.08% | +10,879 | New |
| Lipe & Dalton | 11,128 | $267.0K | 0.13% | −74−0.7% | Reduced |
| BCS Private Wealth Management, Inc. | 11,424 | $273.6K | 0.10% | +11,424 | New |
| Commerce Bank | 11,534 | $276.2K | 0.00% | −1,847−13.8% | Reduced |
| SFMG, LLC | 11,652 | $279.1K | 0.02% | 00.0% | Unchanged |
| Wolverine Trading, LLC | 12,469 | $284.5K | 0.01% | +12,469 | New |
| Cahaba Wealth Management, Inc. | 12,076 | $289.2K | 0.02% | −2,396−16.6% | Reduced |
| Oppenheimer Asset Management Inc. | 12,116 | $290.2K | 0.00% | −667−5.2% | Reduced |
| Quadrant Capital Group LLC | 13,056 | $312.7K | 0.01% | −20.0% | Reduced |
| The PNC Financial Services Group, Inc. | 13,507 | $323.5K | 0.00% | −417−3.0% | Reduced |
| Public Employees Retirement Association of Colorado | 13,525 | $324.0K | 0.00% | 00.0% | Unchanged |
| Davenport & Co LLC | 13,645 | $326.8K | 0.00% | +13,645 | New |
| Toth Financial Advisory Corp | 13,716 | $328.5K | 0.04% | +3,358+32.4% | Added |
| Evergreen Capital Management LLC | 13,863 | $332.0K | 0.01% | +2,667+23.8% | Added |
| CIBC Asset Management Inc | 13,980 | $334.8K | 0.00% | −12−0.1% | Reduced |
| HighTower Advisors, LLC | 14,002 | $335.3K | 0.00% | −856−5.8% | Reduced |
| First Manhattan Co | 14,200 | $340.1K | 0.00% | −1,235−8.0% | Reduced |
| First Bank & Trust | 14,228 | $340.8K | 0.06% | +185+1.3% | Added |
| Pathstone Holdings, LLC | 14,425 | $345.5K | 0.00% | +14,425 | New |
| Entropy Technologies, LP | 14,570 | $349.0K | 0.03% | −11,597−44.3% | Reduced |
| Granite Investment Partners, LLC | 14,758 | $353.5K | 0.02% | −5,215−26.1% | Reduced |
| Summit Financial, LLC | 15,187 | $363.7K | 0.01% | +15,187 | New |
| CWM, LLC | 15,546 | $372.0K | 0.00% | −1,936−11.1% | Reduced |
| JustInvest LLC | 15,752 | $384.3K | 0.00% | +1,147+7.9% | Added |
| Leavell Investment Management, Inc. | 16,137 | $386.5K | 0.02% | −10.0% | Reduced |
| Intrinsic Value Partners, LLC | 16,679 | $399.5K | 0.32% | 00.0% | Unchanged |
| Mutual of America Capital Management LLC | 17,172 | $411.3K | 0.00% | −2,207−11.4% | Reduced |
| Dover Advisors, LLC | 17,285 | $414.0K | 0.16% | +17,285 | New |
| Cambridge Investment Research Advisors, Inc. | 17,662 | $423.0K | 0.00% | −517−2.8% | Reduced |
| Commonwealth Equity Services, LLC | 17,771 | $426.0K | 0.00% | −4,367−19.7% | Reduced |
| Dynamic Technology Lab Private Ltd | 18,458 | $442.0K | 0.07% | +18,458 | New |
| Neuberger Berman Group LLC | 18,637 | $446.4K | 0.00% | −40,163−68.3% | Reduced |
| Deutsche Bank AG | 18,733 | $448.7K | 0.00% | +1,334+7.7% | Added |
| IMC-Chicago, LLC | 19,237 | $460.7K | 0.01% | +3,527+22.5% | Added |
| Truist Financial Corp | 19,237 | $460.7K | 0.00% | −3,279−14.6% | Reduced |
| Security National Bank of Sioux City Iowa | 19,331 | $463.0K | 0.30% | +58+0.3% | Added |
| Wellington Management Group LLP | 19,688 | $471.5K | 0.00% | −41,090−67.6% | Reduced |
| DRW Securities, LLC | 20,061 | $478.8K | 0.02% | +20,061 | New |
| Toroso Investments, LLC | 20,298 | $486.1K | 0.00% | +10,868+115.2% | Added |
| Bryn Mawr Trust Co | 20,578 | $492.8K | 0.01% | −271−1.3% | Reduced |
| Group One Trading, L.P. | 20,607 | $493.5K | 0.01% | −47,301−69.7% | Reduced |
| Bank of Montreal | 21,614 | $517.7K | 0.00% | −19,055−46.9% | Reduced |
| Counterpoint Mutual Funds LLC | 21,913 | $524.8K | 0.04% | +21,913 | New |
| Qsemble Capital Management, LP | 21,929 | $525.2K | 0.05% | +21,929 | New |
| Gabelli Funds LLC | 22,288 | $533.8K | 0.00% | −2,765−11.0% | Reduced |
| Modera Wealth Management, LLC | 22,760 | $545.1K | 0.01% | −3,464−13.2% | Reduced |
| Lathrop Investment Management Corp | 22,817 | $546.0K | 0.10% | −4,994−18.0% | Reduced |
| Pictet Asset Management Holding SA | 23,190 | $555.4K | 0.00% | −10.0% | Reduced |
| Cetera Investment Advisers | 23,209 | $555.9K | 0.00% | +9,030+63.7% | Added |
| Gsa Capital Partners LLP | 23,285 | $558.0K | 0.05% | +23,285 | New |
| Lecap Asset Management Ltd | 23,438 | $561.3K | 0.20% | +23,438 | New |
| Peak Asset Management, LLC | 24,000 | $574.8K | 0.10% | 00.0% | Unchanged |
| Carlson Capital L P | 24,000 | $574.8K | 0.33% | +24,000 | New |
| Quest Partners LLC | 24,111 | $577.5K | 0.04% | +24,111 | New |
| Iat Reinsurance Co Ltd. | 24,693 | $591.4K | 0.12% | 00.0% | Unchanged |
| Stephens Inc | 25,956 | $621.6K | 0.01% | −1,944−7.0% | Reduced |
| US Bancorp | 26,166 | $626.7K | 0.00% | +44+0.2% | Added |
| Sit Investment Associates Inc | 26,202 | $628.0K | 0.01% | 00.0% | Unchanged |
| Neville Rodie & Shaw Inc | 26,442 | $633.0K | 0.05% | −3,000−10.2% | Reduced |
| Susquehanna International Group, LLP | 26,467 | $633.9K | 0.00% | −20,240−43.3% | Reduced |
| Security National Bank of So Dak | 26,786 | $641.5K | 0.32% | −54−0.2% | Reduced |
| Advisor Group Holdings, Inc. | 26,589 | $645.4K | 0.00% | +4,596+20.9% | Added |
| Clifford Swan Investment Counsel LLC | 28,072 | $672.3K | 0.02% | −504−1.8% | Reduced |
| Victory Capital Management Inc | 28,908 | $692.3K | 0.00% | −4,800−14.2% | Reduced |
| SG Americas Securities, LLC | 29,064 | $696.0K | 0.00% | +21,182+268.7% | Added |
| Mraz, Amerine & Associates, Inc. | 29,195 | $699.2K | 0.11% | +20,645+241.5% | Added |
| Maryland State Retirement & Pension System | 29,451 | $705.4K | 0.01% | −22,355−43.2% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 29,538 | $707.4K | 0.00% | +2,700+10.1% | Added |
| Captrust Financial Advisors | 29,673 | $710.7K | 0.00% | −1,142−3.7% | Reduced |
| Sciencast Management LP | 29,673 | $710.7K | 0.13% | +29,673 | New |
| Ensign Peak Advisors, Inc | 29,986 | $718.2K | 0.00% | −10,600−26.1% | Reduced |