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 |
|---|---|---|---|---|---|
| Neuberger Berman Group LLC | 18,637 | $446.4K | 0.00% | −40,163−68.3% | Reduced |
| Dynamic Technology Lab Private Ltd | 18,458 | $442.0K | 0.07% | +18,458 | New |
| Commonwealth Equity Services, LLC | 17,771 | $426.0K | 0.00% | −4,367−19.7% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 17,662 | $423.0K | 0.00% | −517−2.8% | Reduced |
| Dover Advisors, LLC | 17,285 | $414.0K | 0.16% | +17,285 | New |
| Mutual of America Capital Management LLC | 17,172 | $411.3K | 0.00% | −2,207−11.4% | Reduced |
| Intrinsic Value Partners, LLC | 16,679 | $399.5K | 0.32% | 00.0% | Unchanged |
| Leavell Investment Management, Inc. | 16,137 | $386.5K | 0.02% | −10.0% | Reduced |
| JustInvest LLC | 15,752 | $384.3K | 0.00% | +1,147+7.9% | Added |
| CWM, LLC | 15,546 | $372.0K | 0.00% | −1,936−11.1% | Reduced |
| Summit Financial, LLC | 15,187 | $363.7K | 0.01% | +15,187 | New |
| Granite Investment Partners, LLC | 14,758 | $353.5K | 0.02% | −5,215−26.1% | Reduced |
| Entropy Technologies, LP | 14,570 | $349.0K | 0.03% | −11,597−44.3% | Reduced |
| Pathstone Holdings, LLC | 14,425 | $345.5K | 0.00% | +14,425 | New |
| First Bank & Trust | 14,228 | $340.8K | 0.06% | +185+1.3% | Added |
| First Manhattan Co | 14,200 | $340.1K | 0.00% | −1,235−8.0% | Reduced |
| HighTower Advisors, LLC | 14,002 | $335.3K | 0.00% | −856−5.8% | Reduced |
| CIBC Asset Management Inc | 13,980 | $334.8K | 0.00% | −12−0.1% | Reduced |
| Evergreen Capital Management LLC | 13,863 | $332.0K | 0.01% | +2,667+23.8% | Added |
| Toth Financial Advisory Corp | 13,716 | $328.5K | 0.04% | +3,358+32.4% | Added |
| Davenport & Co LLC | 13,645 | $326.8K | 0.00% | +13,645 | New |
| Public Employees Retirement Association of Colorado | 13,525 | $324.0K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 13,507 | $323.5K | 0.00% | −417−3.0% | Reduced |
| Quadrant Capital Group LLC | 13,056 | $312.7K | 0.01% | −20.0% | Reduced |
| Oppenheimer Asset Management Inc. | 12,116 | $290.2K | 0.00% | −667−5.2% | Reduced |
| Cahaba Wealth Management, Inc. | 12,076 | $289.2K | 0.02% | −2,396−16.6% | Reduced |
| Wolverine Trading, LLC | 12,469 | $284.5K | 0.01% | +12,469 | New |
| SFMG, LLC | 11,652 | $279.1K | 0.02% | 00.0% | Unchanged |
| Commerce Bank | 11,534 | $276.2K | 0.00% | −1,847−13.8% | Reduced |
| BCS Private Wealth Management, Inc. | 11,424 | $273.6K | 0.10% | +11,424 | New |
| Lipe & Dalton | 11,128 | $267.0K | 0.13% | −74−0.7% | Reduced |
| Quantessence Capital LLC | 10,879 | $260.6K | 0.08% | +10,879 | New |
| ISAM Funds (UK) Ltd | 10,848 | $259.8K | 0.05% | +10,848 | New |
| Silvercrest Asset Management Group LLC | 10,636 | $254.7K | 0.00% | −17−0.2% | Reduced |
| Advyzon Investment Management, LLC | 10,481 | $251.0K | 0.04% | +10,481 | New |
| Grantham, Mayo, Van Otterloo & Co. LLC | 10,457 | $250.4K | 0.00% | +10,457 | New |
| Prelude Capital Management, LLC | 10,449 | $250.3K | 0.02% | +10,449 | New |
| Brown Advisory Inc | 10,151 | $243.1K | 0.00% | −457−4.3% | Reduced |
| Allworth Financial LP | 10,054 | $240.8K | 0.00% | −202−2.0% | Reduced |
| Sterling Capital Management LLC | 9,961 | $238.6K | 0.00% | −1,032−9.4% | Reduced |
| Lido Advisors, LLC | 9,789 | $234.5K | 0.00% | −496−4.8% | Reduced |
| Shufro Rose & Co LLC | 12,554 | $228.5K | 0.02% | −80−0.6% | Reduced |
| FourThought Financial Partners, LLC | 9,379 | $224.6K | 0.02% | +9,379 | New |
| Point72 Asia (Singapore) Pte. Ltd. | 9,181 | $219.9K | 0.03% | +4,602+100.5% | Added |
| ARS Investment Partners, LLC | 9,000 | $215.6K | 0.01% | +9,000 | New |
| Badgley Phelps Wealth Managers, LLC | 8,971 | $214.9K | 0.00% | −3,903−30.3% | Reduced |
| Syon Capital LLC | 8,727 | $209.0K | 0.01% | −25−0.3% | Reduced |
| PFG Investments, LLC | 8,702 | $208.4K | 0.01% | −2,581−22.9% | Reduced |
| Aberdeen Wealth Management LLC | 8,643 | $207.0K | 0.13% | −848−8.9% | Reduced |
| M&T Bank Corp | 8,531 | $204.5K | 0.00% | −1,688−16.5% | Reduced |
| Coastal Bridge Advisors, LLC | 8,505 | $203.7K | 0.02% | −51,908−85.9% | Reduced |
| Washington Trust Advisors, Inc. | 8,263 | $197.9K | 0.02% | −2,116−20.4% | Reduced |
| Canada Pension Plan Investment Board | 8,094 | $193.9K | 0.00% | 00.0% | Unchanged |
| CX Institutional | 8,075 | $193.0K | 0.01% | −141−1.7% | Reduced |
| Optiver Holding B.V. | 7,954 | $190.5K | 0.00% | +7,954 | New |
| Smithfield Trust Co | 7,890 | $189.0K | 0.01% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 7,760 | $185.9K | 0.00% | +6,924+828.2% | Added |
| BOK Financial Private Wealth, Inc. | 7,088 | $169.8K | 0.01% | −2,279−24.3% | Reduced |
| KBC Group NV | 6,126 | $147.0K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 5,691 | $136.3K | 0.00% | +5,691 | New |
| CIBC Private Wealth Group, LLC | 5,300 | $126.9K | 0.00% | +2,061+63.6% | Added |
| GAMMA Investing LLC | 5,021 | $120.3K | 0.01% | +578+13.0% | Added |
| Whittier Trust Co | 3,999 | $103.8K | 0.00% | +2+0.1% | Added |
| Umb Bank N A | 4,168 | $99.8K | 0.00% | +47+1.1% | Added |
| Parallel Advisors, LLC | 4,164 | $99.7K | 0.00% | −16−0.4% | Reduced |
| Essential Partners LLC | 3,999 | $95.8K | 0.03% | −43−1.1% | Reduced |
| MAI Capital Management | 3,890 | $93.2K | 0.00% | −369−8.7% | Reduced |
| STRS Ohio | 3,807 | $91.2K | 0.00% | +2+0.1% | Added |
| Aster Capital Management (DIFC) Ltd | 2,931 | $70.2K | 0.04% | +2,931 | New |
| Farther Finance Advisors, LLC | 2,892 | $69.3K | 0.00% | +44+1.5% | Added |
| State of Wyoming | 2,796 | $67.0K | 0.01% | +38+1.4% | Added |
| MetLife Investment Management | 2,655 | $63.6K | 0.00% | +2,655 | New |
| Advisory Services Network, LLC | 2,542 | $60.9K | 0.00% | +2,542 | New |
| Point72 Hong Kong Ltd | 2,469 | $59.1K | 0.00% | +2,469 | New |
| FNY Investment Advisers, LLC | 2,400 | $57.0K | 0.02% | 00.0% | Unchanged |
| Fifth Third Bancorp | 2,340 | $56.0K | 0.00% | +16+0.7% | Added |
| Signaturefd, LLC | 2,198 | $52.6K | 0.00% | −43−1.9% | Reduced |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 2,174 | $50.4K | 0.00% | 00.0% | Unchanged |
| Smartleaf Asset Management LLC | 2,142 | $48.9K | 0.00% | +328+18.1% | Added |
| Plante Moran Financial Advisors, LLC | 1,990 | $47.7K | 0.00% | 00.0% | Unchanged |
| Vermillion & White Wealth Management Group, LLC | 1,905 | $45.6K | 0.03% | +1,905 | New |
| Heartwood Wealth Advisors LLC | 1,892 | $45.3K | 0.00% | +1,892 | New |
| Federation des caisses Desjardins du Quebec | 1,845 | $44.2K | 0.00% | −334−15.3% | Reduced |
| Bessemer Group Inc | 1,821 | $44.0K | 0.00% | +341+23.0% | Added |
| Asset Planning,Inc | 1,793 | $42.9K | 0.03% | 00.0% | Unchanged |
| Wealthspire Advisors, LLC | 1,734 | $41.5K | 0.00% | +1,734 | New |
| Central Trust Co | 1,534 | $36.7K | 0.00% | −418−21.4% | Reduced |
| Atlantic Union Bankshares Corp | 1,475 | $35.3K | 0.00% | +400+37.2% | Added |
| Nomura Asset Management Co Ltd | 1,449 | $34.7K | 0.00% | −65−4.3% | Reduced |
| Global Retirement Partners, LLC | 1,406 | $33.7K | 0.00% | −11−0.8% | Reduced |
| National Bank of Canada | 1,378 | $33.3K | 0.00% | −390−22.1% | Reduced |
| EverSource Wealth Advisors, LLC | 1,372 | $32.9K | 0.00% | −148−9.7% | Reduced |
| Mather Group, LLC. | 1,349 | $32.3K | 0.00% | +1,349 | New |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1,310 | $31.0K | 0.00% | −97−6.9% | Reduced |
| HM Payson & Co | 1,226 | $29.4K | 0.00% | 00.0% | Unchanged |
| Brown Brothers Harriman & Co | 1,208 | $28.9K | 0.00% | 00.0% | Unchanged |
| Ronald Blue Trust, Inc. | 1,204 | $28.8K | 0.00% | +648+116.5% | Added |
| Whittier Trust Co of Nevada Inc | 1,081 | $28.1K | 0.00% | 00.0% | Unchanged |
| Korea Investment CORP | 1,166 | $27.9K | 0.00% | −2,820−70.7% | Reduced |
| Spire Wealth Management | 1,134 | $27.2K | 0.00% | +263+30.2% | Added |