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 |
|---|---|---|---|---|---|
| CIBC Private Wealth Group, LLC | 3,239 | $76.5K | 0.00% | −1,364−29.6% | Reduced |
| Exchange Traded Concepts, LLC | 3,332 | $78.7K | 0.00% | +3,332 | New |
| STRS Ohio | 3,805 | $89.8K | 0.00% | +3,805 | New |
| Korea Investment CORP | 3,986 | $94.1K | 0.00% | +3,986 | New |
| Whittier Trust Co | 3,997 | $94.4K | 0.00% | −269−6.3% | Reduced |
| Essential Partners LLC | 4,042 | $95.4K | 0.04% | +4,042 | New |
| Umb Bank N A | 4,121 | $97.3K | 0.00% | +430+11.6% | Added |
| Parallel Advisors, LLC | 4,180 | $98.7K | 0.00% | +2,764+195.2% | Added |
| MAI Capital Management | 4,259 | $100.6K | 0.00% | +468+12.3% | Added |
| Glenmede Investment Management, LP | 4,325 | $102.1K | 0.00% | +4,325 | New |
| Quarry LP | 4,337 | $102.4K | 0.02% | +2,667+159.7% | Added |
| Tower Research Capital LLC (TRC) | 4,353 | $102.8K | 0.00% | +2,810+182.1% | Added |
| GAMMA Investing LLC | 4,443 | $104.9K | 0.01% | +1,306+41.6% | Added |
| Point72 Asia (Singapore) Pte. Ltd. | 4,579 | $108.1K | 0.02% | +4,579 | New |
| KBC Group NV | 6,126 | $145.0K | 0.00% | −1,213−16.5% | Reduced |
| American National Bank | 6,788 | $160.3K | 0.02% | +388+6.1% | Added |
| Intact Investment Management Inc. | 7,319 | $172.8K | 0.01% | +419+6.1% | Added |
| Smithfield Trust Co | 7,890 | $186.0K | 0.01% | +34+0.4% | Added |
| SG Americas Securities, LLC | 7,882 | $186.0K | 0.00% | +7,882 | New |
| Canada Pension Plan Investment Board | 8,094 | $191.1K | 0.00% | +8,094 | New |
| CX Institutional | 8,216 | $194.0K | 0.01% | +7,603+1,240.3% | Added |
| Mraz, Amerine & Associates, Inc. | 8,550 | $201.9K | 0.03% | +8,550 | New |
| Syon Capital LLC | 8,752 | $206.6K | 0.01% | +8,752 | New |
| Cantor Fitzgerald, L. P. | 9,087 | $214.5K | 0.01% | −22,427−71.2% | Reduced |
| Ethic Inc. | 9,149 | $214.5K | 0.00% | +9,149 | New |
| EntryPoint Capital, LLC | 9,103 | $214.9K | 0.11% | +9,103 | New |
| Oppenheimer & Co Inc | 9,163 | $216.3K | 0.00% | +9,163 | New |
| Utah Retirement Systems | 9,183 | $216.8K | 0.00% | +9,183 | New |
| BOK Financial Private Wealth, Inc. | 9,367 | $221.2K | 0.01% | −2,345−20.0% | Reduced |
| Toroso Investments, LLC | 9,430 | $222.6K | 0.00% | +9,430 | New |
| Aberdeen Wealth Management LLC | 9,491 | $224.1K | 0.15% | +9,491 | New |
| Shufro Rose & Co LLC | 12,634 | $229.9K | 0.02% | −400−3.1% | Reduced |
| Chung Wu Investment Group, LLC | 9,744 | $230.1K | 0.24% | +9,744 | New |
| ExodusPoint Capital Management, LP | 9,801 | $231.0K | 0.00% | +9,801 | New |
| Kentucky Retirement Systems | 9,971 | $235.4K | 0.01% | −141−1.4% | Reduced |
| Janney Montgomery Scott LLC | 10,014 | $236.0K | 0.00% | −23,753−70.3% | Reduced |
| Lingohr & Partner Asset Management GmbH | 10,000 | $236.0K | 0.43% | +10,000 | New |
| Everett Harris & Co | 10,085 | $238.1K | 0.00% | −21,325−67.9% | Reduced |
| M&T Bank Corp | 10,219 | $240.9K | 0.00% | +10,219 | New |
| Allworth Financial LP | 10,256 | $242.1K | 0.00% | +1,990+24.1% | Added |
| Lido Advisors, LLC | 10,285 | $242.8K | 0.00% | −111−1.1% | Reduced |
| Diametric Capital, LP | 10,343 | $244.2K | 0.13% | +10,343 | New |
| Toth Financial Advisory Corp | 10,358 | $244.6K | 0.03% | +2,334+29.1% | Added |
| Washington Trust Advisors, Inc. | 10,379 | $245.0K | 0.02% | −43,467−80.7% | Reduced |
| Mesirow Financial Investment Management, Inc. | 10,515 | $248.3K | 0.00% | +10,515 | New |
| Brown Advisory Inc | 10,608 | $250.5K | 0.00% | −1,057−9.1% | Reduced |
| Silvercrest Asset Management Group LLC | 10,653 | $251.5K | 0.00% | +653+6.5% | Added |
| Sterling Capital Management LLC | 10,993 | $259.5K | 0.00% | +2,758+33.5% | Added |
| Lipe & Dalton | 11,202 | $264.0K | 0.14% | −172−1.5% | Reduced |
| Evergreen Capital Management LLC | 11,196 | $264.3K | 0.01% | +11,196 | New |
| United Capital Financial Advisers, LLC | 11,228 | $265.1K | 0.00% | +11,228 | New |
| PFG Investments, LLC | 11,283 | $266.4K | 0.02% | +11,283 | New |
| Whalen Wealth Management Inc. | 11,616 | $274.3K | 0.17% | +11,616 | New |
| SFMG, LLC | 11,652 | $275.1K | 0.02% | +668+6.1% | Added |
| Oppenheimer Asset Management Inc. | 12,783 | $301.8K | 0.00% | +12,783 | New |
| Badgley Phelps Wealth Managers, LLC | 12,874 | $303.9K | 0.01% | +12,874 | New |
| Quadrant Capital Group LLC | 13,058 | $308.3K | 0.01% | +1,389+11.9% | Added |
| Worldquant Millennium Advisors LLC | 13,358 | $315.4K | 0.00% | +13,358 | New |
| Commerce Bank | 13,381 | $315.9K | 0.00% | +13,381 | New |
| Public Employees Retirement Association of Colorado | 13,525 | $319.0K | 0.00% | +757+5.9% | Added |
| Aristeia Capital LLC | 13,568 | $320.3K | 0.01% | +13,568 | New |
| Two Sigma Investments, LP | 13,729 | $324.1K | 0.00% | −40,371−74.6% | Reduced |
| The PNC Financial Services Group, Inc. | 13,924 | $328.7K | 0.00% | −1,638−10.5% | Reduced |
| CIBC Asset Management Inc | 13,992 | $330.4K | 0.00% | +839+6.4% | Added |
| First Bank & Trust | 14,043 | $331.6K | 0.06% | −314−2.2% | Reduced |
| Cetera Investment Advisers | 14,179 | $334.8K | 0.00% | +14,179 | New |
| Cahaba Wealth Management, Inc. | 14,472 | $341.7K | 0.03% | +829+6.1% | Added |
| HighTower Advisors, LLC | 14,858 | $350.8K | 0.00% | −1,843−11.0% | Reduced |
| JustInvest LLC | 14,605 | $351.5K | 0.00% | +14,605 | New |
| Rock Creek Group, LP | 15,000 | $354.1K | 0.04% | −10,000−40.0% | Reduced |
| First Manhattan Co | 15,435 | $364.4K | 0.00% | −574−3.6% | Reduced |
| Axq Capital, LP | 15,609 | $368.5K | 0.12% | +15,609 | New |
| IMC-Chicago, LLC | 15,710 | $370.9K | 0.01% | +15,710 | New |
| Leavell Investment Management, Inc. | 16,138 | $381.0K | 0.02% | +4,524+39.0% | Added |
| Intrinsic Value Partners, LLC | 16,679 | $393.8K | 0.35% | +791+5.0% | Added |
| Deutsche Bank AG | 17,399 | $410.8K | 0.00% | +311+1.8% | Added |
| CWM, LLC | 17,482 | $413.0K | 0.00% | +13,148+303.4% | Added |
| Cambridge Investment Research Advisors, Inc. | 18,179 | $429.0K | 0.00% | +2,992+19.7% | Added |
| Phoenix Holdings Ltd. | 18,932 | $447.0K | 0.01% | 00.0% | Unchanged |
| Security National Bank of Sioux City Iowa | 19,273 | $455.0K | 0.32% | +2,204+12.9% | Added |
| Mutual of America Capital Management LLC | 19,379 | $457.5K | 0.00% | −1,578−7.5% | Reduced |
| Granite Investment Partners, LLC | 19,973 | $471.6K | 0.02% | −80−0.4% | Reduced |
| Bryn Mawr Trust Co | 20,849 | $492.2K | 0.01% | +983+4.9% | Added |
| Advisor Group Holdings, Inc. | 21,993 | $519.1K | 0.00% | +1,396+6.8% | Added |
| Commonwealth Equity Services, LLC | 22,138 | $523.0K | 0.00% | −5,977−21.3% | Reduced |
| Sandia Investment Management LP | 22,505 | $531.3K | 1.36% | +2,700+13.6% | Added |
| Truist Financial Corp | 22,516 | $531.6K | 0.00% | +794+3.7% | Added |
| Pictet Asset Management Holding SA | 23,191 | $547.5K | 0.00% | +1,924+9.0% | Added |
| Algert Global LLC | 23,880 | $563.8K | 0.01% | +23,880 | New |
| Peak Asset Management, LLC | 24,000 | $566.6K | 0.10% | 00.0% | Unchanged |
| Wesbanco Bank Inc | 24,466 | $577.6K | 0.02% | +416+1.7% | Added |
| Iat Reinsurance Co Ltd. | 24,693 | $583.0K | 0.13% | +24,693 | New |
| Gabelli Funds LLC | 25,053 | $591.5K | 0.00% | +25,053 | New |
| Marco Investment Management LLC | 25,157 | $594.0K | 0.05% | −4,088−14.0% | Reduced |
| Proficio Capital Partners LLC | 26,031 | $614.6K | 0.04% | +3,054+13.3% | Added |
| US Bancorp | 26,122 | $616.7K | 0.00% | +2,564+10.9% | Added |
| Entropy Technologies, LP | 26,167 | $617.8K | 0.05% | +26,167 | New |
| Sit Investment Associates Inc | 26,202 | $619.0K | 0.01% | +1,502+6.1% | Added |
| Modera Wealth Management, LLC | 26,224 | $619.1K | 0.01% | −1,624−5.8% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 26,838 | $633.6K | 0.00% | −8,100−23.2% | Reduced |