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, Q1 2025
Institutional positions in Amentum Holdings, Inc. as of Mar 31, 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
- 418
- −22 vs. Q4 2024
- Shares held
- 191.7M
- +26.8M (+16.3%) vs. Q4 2024
- Total value
- $3.49B
- +$18.2M (+0.5%) vs. Q4 2024
- New holders
- 73
- 112 more added
- Sold out
- 95
- 151 more reduced
11 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| State of Tennessee, Treasury Department | 75,568 | $1.38M | 0.01% | +33,045+77.7% | Added |
| Ancora Advisors, LLC | 68,770 | $1.25M | 0.03% | +68,705+105,700.0% | Added |
| Walleye Trading LLC | 68,470 | $1.25M | 0.04% | +35,698+108.9% | Added |
| Caption Management, LLC | 68,400 | $1.24M | 0.06% | −41,451−37.7% | Reduced |
| Treasurer of the State of North Carolina | 67,783 | $1.23M | 0.00% | +10,690+18.7% | Added |
| Illinois Municipal Retirement Fund | 66,507 | $1.21M | 0.02% | +66,507 | New |
| Hahn Capital Management LLC | 65,633 | $1.19M | 0.58% | −11,689−15.1% | Reduced |
| Kodai Capital Management LP | 65,540 | $1.19M | 0.05% | +65,540 | New |
| Centiva Capital, LP | 65,258 | $1.19M | 0.07% | −38,882−37.3% | Reduced |
| Teacher Retirement System of Texas | 64,170 | $1.17M | 0.00% | −22,522−26.0% | Reduced |
| Wolf Hill Capital Management, LP | 63,857 | $1.16M | 0.11% | +63,857 | New |
| WSFS Capital Management, LLC | 62,372 | $1.14M | 0.07% | +2,898+4.9% | Added |
| Weiss Asset Management LP | 60,953 | $1.11M | 0.03% | +30,922+103.0% | Added |
| Louisiana State Employees Retirement System | 58,400 | $1.06M | 0.02% | −1,600−2.7% | Reduced |
| Natixis Advisors, L.P. | 56,858 | $1.03M | 0.00% | +33,686+145.4% | Added |
| Advisors Asset Management, Inc. | 56,602 | $1.03M | 0.02% | −14,647−20.6% | Reduced |
| Teachers Retirement System of the State of Kentucky | 55,816 | $1.02M | 0.01% | +6,232+12.6% | Added |
| Barclays PLC | 55,504 | $1.01M | 0.00% | −114,147−67.3% | Reduced |
| Alliancebernstein L.P. | 55,179 | $1.00M | 0.00% | +7,126+14.8% | Added |
| Blair William & Co | 54,200 | $986.4K | 0.00% | −2,219−3.9% | Reduced |
| Two Sigma Investments, LP | 54,100 | $984.6K | 0.00% | +54,100 | New |
| Washington Trust Advisors, Inc. | 53,846 | $980.0K | 0.09% | −26,394−32.9% | Reduced |
| Engineers Gate Manager LP | 53,830 | $979.7K | 0.02% | +53,830 | New |
| Neville Rodie & Shaw Inc | 53,343 | $971.0K | 0.08% | −27,656−34.1% | Reduced |
| Simplex Trading, LLC | 52,827 | $961.0K | 0.03% | −167,154−76.0% | Reduced |
| Wells Fargo & Company | 50,452 | $918.2K | 0.00% | −39,109−43.7% | Reduced |
| Maryland State Retirement & Pension System | 49,022 | $892.2K | 0.02% | +114+0.2% | Added |
| Paragon Capital Management LLC | 48,072 | $874.9K | 0.50% | −2,024−4.0% | Reduced |
| Public Employees Retirement System of Ohio | 47,616 | $866.6K | 0.00% | +3,010+6.7% | Added |
| Yousif Capital Management, LLC | 46,440 | $845.2K | 0.01% | −2,330−4.8% | Reduced |
| Highland Capital Management Fund Advisors, L.P. | 43,900 | $799.0K | 0.08% | +25,905+144.0% | Added |
| Amalgamated Bank | 43,366 | $789.0K | 0.01% | +4,756+12.3% | Added |
| CI Private Wealth, LLC | 43,236 | $786.9K | 0.00% | −29,547−40.6% | Reduced |
| Hikari Tsushin, Inc. | 42,800 | $779.0K | 0.05% | 00.0% | Unchanged |
| AWH Capital, L.P. | 42,500 | $773.5K | 1.12% | +42,500 | New |
| Quantinno Capital Management LP | 41,210 | $750.0K | 0.00% | +3,895+10.4% | Added |
| Lathrop Investment Management Corp | 40,524 | $738.0K | 0.15% | −43,520−51.8% | Reduced |
| Clear Harbor Asset Management, LLC | 40,543 | $737.9K | 0.06% | +40,543 | New |
| Freestone Capital Holdings, LLC | 40,027 | $728.5K | 0.03% | +40,027 | New |
| Pine Valley Investments Ltd Liability Co | 39,820 | $724.7K | 0.05% | +260+0.7% | Added |
| Versor Investments LP | 39,400 | $717.1K | 0.12% | +39,400 | New |
| Tower Bridge Advisors | 38,888 | $707.8K | 0.08% | −54,844−58.5% | Reduced |
| Cerity Partners LLC | 38,804 | $706.2K | 0.00% | −30,719−44.2% | Reduced |
| Allianz Asset Management GmbH | 38,700 | $704.3K | 0.00% | +38,700 | New |
| Arizona State Retirement System | 38,385 | $698.6K | 0.00% | −450−1.2% | Reduced |
| Ensign Peak Advisors, Inc | 38,260 | $696.3K | 0.00% | 00.0% | Unchanged |
| Williams Jones Wealth Management, LLC. | 38,110 | $693.6K | 0.01% | −2,935−7.2% | Reduced |
| Manufacturers Life Insurance Company, The | 37,520 | $682.9K | 0.00% | +37,520 | New |
| American Trust Investment Advisors, LLC | 35,688 | $649.5K | 0.27% | −2,166−5.7% | Reduced |
| Bank of Montreal | 35,459 | $645.4K | 0.00% | −24,282−40.6% | Reduced |
| Sig Brokerage, LP | 35,052 | $637.9K | 0.19% | +35,052 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 34,938 | $635.9K | 0.00% | −1,600−4.4% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 34,352 | $625.2K | 0.00% | +7,862+29.7% | Added |
| Janney Montgomery Scott LLC | 33,767 | $615.0K | 0.00% | +33,767 | New |
| Wolverine Asset Management LLC | 33,240 | $605.0K | 0.01% | +33,240 | New |
| National Philanthropic Trust | 33,021 | $601.0K | 0.01% | −15,642−32.1% | Reduced |
| Oregon Public Employees Retirement Fund | 32,800 | $597.0K | 0.01% | +3,600+12.3% | Added |
| Stephens Inc | 32,729 | $595.7K | 0.01% | −3,973−10.8% | Reduced |
| Wolverine Trading, LLC | 32,816 | $593.0K | 0.02% | −38,287−53.8% | Reduced |
| ABS Direct Equity Fund LLC | 32,500 | $591.5K | 0.79% | +32,500 | New |
| Mariner, LLC | 31,729 | $577.5K | 0.00% | −7,155−18.4% | Reduced |
| Cantor Fitzgerald, L. P. | 31,514 | $573.6K | 0.02% | +31,514 | New |
| Everett Harris & Co | 31,410 | $571.7K | 0.01% | −10,478−25.0% | Reduced |
| Renaissance Technologies LLC | 31,400 | $571.5K | 0.00% | +20,400+185.5% | Added |
| Gsa Capital Partners LLP | 30,488 | $555.0K | 0.05% | +30,488 | New |
| Nisa Investment Advisors, LLC | 30,487 | $554.9K | 0.00% | −4,512−12.9% | Reduced |
| Victory Capital Management Inc | 29,859 | $543.4K | 0.00% | −12,460−29.4% | Reduced |
| Marco Investment Management LLC | 29,245 | $532.3K | 0.05% | −6,730−18.7% | Reduced |
| Clifford Swan Investment Counsel LLC | 28,630 | $521.1K | 0.02% | −800−2.7% | Reduced |
| Quantbot Technologies LP | 28,362 | $516.2K | 0.02% | +28,362 | New |
| Commonwealth Equity Services, LLC | 28,115 | $512.0K | 0.00% | −4,465−13.7% | Reduced |
| Carlson Capital L P | 28,000 | $509.6K | 0.28% | +28,000 | New |
| Modera Wealth Management, LLC | 27,848 | $506.8K | 0.01% | −7,343−20.9% | Reduced |
| Jones Financial Companies LLLP | 27,594 | $499.2K | 0.00% | −9,415−25.4% | Reduced |
| Two Sigma Advisers, LP | 25,500 | $464.1K | 0.00% | +25,500 | New |
| Rock Creek Group, LP | 25,000 | $455.0K | 0.05% | +25,000 | New |
| Security National Bank of So Dak | 24,824 | $451.8K | 0.26% | +1,525+6.5% | Added |
| Sit Investment Associates Inc | 24,700 | $450.0K | 0.01% | 00.0% | Unchanged |
| Wesbanco Bank Inc | 24,050 | $437.7K | 0.02% | 00.0% | Unchanged |
| Peak Asset Management, LLC | 24,000 | $436.8K | 0.08% | 00.0% | Unchanged |
| Quest Partners LLC | 23,780 | $432.8K | 0.05% | 00.0% | Unchanged |
| Colony Group, LLC | 23,759 | $432.4K | 0.00% | −177,585−88.2% | Reduced |
| US Bancorp | 23,558 | $428.8K | 0.00% | −4,384−15.7% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 23,122 | $420.8K | 0.00% | +4,256+22.6% | Added |
| Proficio Capital Partners LLC | 22,977 | $411.6K | 0.03% | +22,977 | New |
| Truist Financial Corp | 21,722 | $395.3K | 0.00% | −6,636−23.4% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 21,465 | $390.7K | 0.00% | −10,700−33.3% | Reduced |
| Pictet Asset Management Holding SA | 21,267 | $387.1K | 0.00% | +1,509+7.6% | Added |
| Mutual of America Capital Management LLC | 20,957 | $381.4K | 0.00% | +2,161+11.5% | Added |
| Captrust Financial Advisors | 20,615 | $375.2K | 0.00% | −5,241−20.3% | Reduced |
| Advisor Group Holdings, Inc. | 20,597 | $374.8K | 0.00% | +618+3.1% | Added |
| Granite Investment Partners, LLC | 20,053 | $365.0K | 0.02% | −18,280−47.7% | Reduced |
| Bryn Mawr Trust Co | 19,866 | $361.6K | 0.01% | −12,393−38.4% | Reduced |
| Sandia Investment Management LP | 19,805 | $360.5K | 1.05% | +19,805 | New |
| Creative Planning | 19,187 | $349.2K | 0.00% | −594−3.0% | Reduced |
| Kirtland Hills Capital Management, LLC | 18,542 | $348.4K | 0.21% | 00.0% | Unchanged |
| Phoenix Holdings Ltd. | 18,932 | $344.6K | 0.01% | 00.0% | Unchanged |
| Hyperion Capital Advisors LP | 18,586 | $338.3K | 0.18% | −977−5.0% | Reduced |
| Jacobs Levy Equity Management, Inc | 17,533 | $319.1K | 0.00% | −127,938−87.9% | Reduced |
| Deutsche Bank AG | 17,088 | $311.0K | 0.00% | +2,820+19.8% | Added |