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 2026
Institutional positions in Amentum Holdings, Inc. as of Jun 30, 2026. 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
- 464
- −15 vs. Q1 2026
- Shares held
- 218.9M
- +7.93M (+3.8%) vs. Q1 2026
- Total value
- $4.34B
- −$931.8M (−17.7%) vs. Q1 2026
- New holders
- 59
- 147 more added
- Sold out
- 74
- 161 more reduced
7 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Leavell Investment Management, Inc. | 24,660 | $509.7K | 0.02% | +8,023+48.2% | Added |
| Oppenheimer Asset Management Inc. | 24,597 | $508.4K | 0.01% | −3,557−12.6% | Reduced |
| Feynman Point Asset Management LLC | 24,075 | $497.6K | 0.91% | +24,075 | New |
| Peak Asset Management, LLC | 24,000 | $496.1K | 0.07% | 00.0% | Unchanged |
| Pathstone Holdings, LLC | 23,947 | $495.0K | 0.00% | +2,153+9.9% | Added |
| Security National Bank of Sioux City Iowa | 23,326 | $482.1K | 0.20% | +5,565+31.3% | Added |
| US Bancorp | 22,681 | $468.8K | 0.00% | −1,596−6.6% | Reduced |
| HSBC Holdings PLC | 22,218 | $460.1K | 0.00% | +22,218 | New |
| Toroso Investments, LLC | 22,071 | $456.2K | 0.00% | +7,741+54.0% | Added |
| Deutsche Bank AG | 21,821 | $451.0K | 0.00% | +1,967+9.9% | Added |
| Grantham, Mayo, Van Otterloo & Co. LLC | 21,601 | $446.5K | 0.00% | +21,601 | New |
| Neville Rodie & Shaw Inc | 21,486 | $444.0K | 0.03% | −324−1.5% | Reduced |
| Gryphon Financial Partners LLC | 21,057 | $435.2K | 0.04% | +2,174+11.5% | Added |
| Guidance Capital, Inc | 20,853 | $433.1K | 0.09% | +1,382+7.1% | Added |
| Stephens Inc | 20,516 | $424.1K | 0.00% | −2,879−12.3% | Reduced |
| Bank of Montreal | 20,485 | $423.4K | 0.00% | +519+2.6% | Added |
| Summit Trail Advisors, LLC | 20,229 | $418.1K | 0.01% | +6,267+44.9% | Added |
| Lathrop Investment Management Corp | 19,526 | $404.0K | 0.07% | −518−2.6% | Reduced |
| Virginia Retirement Systems Et Al | 19,400 | $401.0K | 0.00% | 00.0% | Unchanged |
| Mutual of America Capital Management LLC | 19,129 | $395.4K | 0.00% | +1,542+8.8% | Added |
| Weatherly Asset Management L. P. | 18,650 | $385.5K | 0.03% | +8,960+92.5% | Added |
| Commonwealth Equity Services, LLC | 18,240 | $377.0K | 0.00% | +760+4.3% | Added |
| Hancock Whitney Corp | 18,236 | $376.9K | 0.01% | +18,236 | New |
| Toth Financial Advisory Corp | 18,226 | $376.7K | 0.04% | −4,129−18.5% | Reduced |
| Aso Group Ltd | 17,724 | $366.0K | 0.16% | 00.0% | Unchanged |
| State of Wyoming | 17,667 | $365.2K | 0.04% | +9,365+112.8% | Added |
| Shay Capital LLC | 17,500 | $361.7K | 0.04% | +17,500 | New |
| Clifford Swan Investment Counsel LLC | 17,495 | $361.6K | 0.01% | −1,719−8.9% | Reduced |
| JustInvest LLC | 17,111 | $353.7K | 0.00% | +621+3.8% | Added |
| CIBC Asset Management Inc | 17,104 | $353.5K | 0.00% | −1,331−7.2% | Reduced |
| Simplex Trading, LLC | 17,003 | $351.5K | 0.01% | +17,003 | New |
| Machina Capital S.A.S. | 16,681 | $344.8K | 0.05% | +8,399+101.4% | Added |
| Cambridge Investment Research Advisors, Inc. | 16,485 | $341.0K | 0.00% | −2,744−14.3% | Reduced |
| Elo Mutual Pension Insurance Co | 16,030 | $331.3K | 0.00% | +16,030 | New |
| Teacher Retirement System of Texas | 15,882 | $328.3K | 0.00% | +6,150+63.2% | Added |
| Sanctuary Advisors, LLC | 15,732 | $325.2K | 0.00% | +15,732 | New |
| Heritage Wealth Advisors | 15,532 | $321.0K | 0.01% | −817−5.0% | Reduced |
| Truist Financial Corp | 15,323 | $316.7K | 0.00% | −1,067−6.5% | Reduced |
| Caitong International Asset Management Co., Ltd | 15,239 | $315.0K | 0.04% | +12,302+418.9% | Added |
| Moran Wealth Management, LLC | 15,076 | $311.6K | 0.01% | −4,509−23.0% | Reduced |
| First Manhattan Co | 14,242 | $294.4K | 0.00% | +125+0.9% | Added |
| HighTower Advisors, LLC | 14,108 | $291.6K | 0.00% | −4,505−24.2% | Reduced |
| Walleye Capital LLC | 13,836 | $286.0K | 0.00% | +10,009+261.5% | Added |
| Franklin Resources Inc | 13,587 | $280.8K | 0.00% | +1,740+14.7% | Added |
| Public Employees Retirement Association of Colorado | 13,525 | $280.0K | 0.00% | 00.0% | Unchanged |
| Intrinsic Value Partners, LLC | 13,399 | $277.0K | 0.19% | −500−3.6% | Reduced |
| Sterling Capital Management LLC | 13,388 | $276.7K | 0.00% | −1,020−7.1% | Reduced |
| Granite Investment Partners, LLC | 13,248 | $273.8K | 0.01% | 00.0% | Unchanged |
| Formidable Asset Management, LLC | 13,065 | $270.1K | 0.04% | −408−3.0% | Reduced |
| First Bank & Trust | 13,029 | $269.3K | 0.04% | −389−2.9% | Reduced |
| Quadrant Capital Group LLC | 13,002 | $268.8K | 0.01% | −570−4.2% | Reduced |
| Mercer Global Advisors Inc | 12,996 | $268.6K | 0.00% | −2,478−16.0% | Reduced |
| Cetera Investment Advisers | 12,885 | $266.3K | 0.00% | −11,490−47.1% | Reduced |
| Mitsubishi UFJ Trust & Banking Corp | 12,499 | $258.4K | 0.00% | +12,499 | New |
| Cahaba Wealth Management, Inc. | 12,076 | $249.6K | 0.02% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 12,020 | $248.5K | 0.00% | −1,654−12.1% | Reduced |
| 111 Capital | 11,779 | $243.5K | 0.04% | +11,779 | New |
| PFG Investments, LLC | 11,351 | $234.6K | 0.01% | +1,019+9.9% | Added |
| Lipe & Dalton | 10,916 | $226.0K | 0.11% | 00.0% | Unchanged |
| Xponance, Inc. | 10,908 | $225.5K | 0.00% | −573−5.0% | Reduced |
| Shufro Rose & Co LLC | 10,734 | $221.9K | 0.01% | −20.0% | Reduced |
| Janney Montgomery Scott LLC | 10,442 | $216.0K | 0.00% | −2,286−18.0% | Reduced |
| Swiss Life Asset Management Ltd | 10,448 | $216.0K | 0.00% | −6,070−36.7% | Reduced |
| AE Wealth Management LLC | 10,379 | $214.5K | 0.00% | +1,139+12.3% | Added |
| Lecap Asset Management Ltd | 10,370 | $214.3K | 0.09% | +10,370 | New |
| Advyzon Investment Management, LLC | 10,228 | $211.4K | 0.02% | −123−1.2% | Reduced |
| Cinctive Capital Management LP | 10,000 | $206.7K | 0.01% | +10,000 | New |
| Allworth Financial LP | 9,805 | $202.7K | 0.00% | −199−2.0% | Reduced |
| SFMG, LLC | 9,785 | $202.3K | 0.01% | 00.0% | Unchanged |
| Excelsior Advisor Network LLC | 9,779 | $202.1K | 0.03% | +9,779 | New |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 9,500 | $196.4K | 0.00% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 9,386 | $194.0K | 0.00% | 00.0% | Unchanged |
| Danske Bank A/S | 8,536 | $176.4K | 0.00% | +407+5.0% | Added |
| SRS Capital Advisors, Inc. | 8,294 | $171.4K | 0.00% | +6,633+399.3% | Added |
| Aberdeen Wealth Management LLC | 8,291 | $171.4K | 0.08% | −348−4.0% | Reduced |
| Smithfield Trust Co | 7,890 | $161.0K | 0.01% | 00.0% | Unchanged |
| CX Institutional | 7,694 | $159.0K | 0.00% | −202−2.6% | Reduced |
| STRS Ohio | 6,195 | $128.1K | 0.00% | +2,387+62.7% | Added |
| KBC Group NV | 5,431 | $112.0K | 0.00% | 00.0% | Unchanged |
| BOK Financial Private Wealth, Inc. | 5,268 | $108.9K | 0.01% | −856−14.0% | Reduced |
| GAMMA Investing LLC | 4,958 | $102.5K | 0.00% | −701−12.4% | Reduced |
| Horizon Investments, LLC | 4,407 | $91.1K | 0.00% | +684+18.4% | Added |
| Rockefeller Capital Management L.P. | 4,108 | $84.9K | 0.00% | −143−3.4% | Reduced |
| New Age Alpha Advisors, LLC | 4,015 | $83.0K | 0.00% | +4,015 | New |
| Parallel Advisors, LLC | 3,948 | $81.6K | 0.00% | −347−8.1% | Reduced |
| Whittier Trust Co | 3,614 | $80.4K | 0.00% | 00.0% | Unchanged |
| Washington Trust Advisors, Inc. | 3,598 | $74.4K | 0.01% | −4,532−55.7% | Reduced |
| Covestor Ltd | 3,512 | $73.0K | 0.04% | +1,138+47.9% | Added |
| TD Waterhouse Canada Inc. | 3,342 | $67.5K | 0.00% | −1,106−24.9% | Reduced |
| McDonald Partners LLC | 3,092 | $63.9K | 0.02% | +3,092 | New |
| Farther Finance Advisors, LLC | 2,521 | $52.1K | 0.00% | −129−4.9% | Reduced |
| MetLife Investment Management | 2,489 | $51.4K | 0.00% | −120−4.6% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2,375 | $49.1K | 0.00% | +48+2.1% | Added |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 2,174 | $44.9K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 2,164 | $44.7K | 0.00% | −170−7.3% | Reduced |
| Pinnacle Wealth Planning Services, Inc. | 1,932 | $39.9K | 0.00% | −1,208−38.5% | Reduced |
| Umb Bank N A | 1,844 | $38.1K | 0.00% | −657−26.3% | Reduced |
| Salomon & Ludwin, LLC | 1,868 | $37.7K | 0.00% | +563+43.1% | Added |
| Nykredit A/S | 1,800 | $37.2K | 0.00% | +1,800 | New |
| Asset Planning,Inc | 1,793 | $37.1K | 0.02% | 00.0% | Unchanged |