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, Q4 2025
Institutional positions in Amentum Holdings, Inc. as of Dec 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
- 483
- +31 vs. Q3 2025
- Shares held
- 203.8M
- +10.7M (+5.5%) vs. Q3 2025
- Total value
- $5.64B
- +$1.01B (+21.9%) vs. Q3 2025
- New holders
- 88
- 132 more added
- Sold out
- 57
- 159 more reduced
10 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| True Wealth Design, LLC | 169 | $4.90K | 0.00% | +103+156.1% | Added |
| Geneos Wealth Management Inc. | 170 | $4.93K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 171 | $4.96K | 0.00% | −171−50.0% | Reduced |
| Harbor Capital Advisors, Inc. | 169 | $5.00K | 0.00% | −1−0.6% | Reduced |
| Elevated Capital Advisors, LLC | 177 | $5.13K | 0.00% | +177 | New |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 170 | $5.18K | 0.00% | 00.0% | Unchanged |
| Medallion Wealth Advisors, LLC | 180 | $5.22K | 0.00% | 00.0% | Unchanged |
| Cromwell Holdings LLC | 184 | $5.34K | 0.00% | 00.0% | Unchanged |
| DV Trading LLC | 188 | $5.45K | 0.00% | +188 | New |
| Central Trust Co | 194 | $5.63K | 0.00% | −1,340−87.4% | Reduced |
| Sachetta, LLC | 194 | $5.63K | 0.00% | 00.0% | Unchanged |
| Massmutual Trust Co FSB | 195 | $5.66K | 0.00% | 00.0% | Unchanged |
| Bellevue Asset Management, LLC | 197 | $5.71K | 0.00% | 00.0% | Unchanged |
| Old Second National Bank of Aurora | 212 | $6.15K | 0.00% | 00.0% | Unchanged |
| Perkins Coie Trust Co | 219 | $6.35K | 0.00% | 00.0% | Unchanged |
| Glen Eagle Advisors, LLC | 226 | $6.55K | 0.00% | −6−2.6% | Reduced |
| Financial Management Professionals, Inc. | 228 | $6.61K | 0.00% | 00.0% | Unchanged |
| DT Investment Partners, LLC | 230 | $6.67K | 0.00% | 00.0% | Unchanged |
| Torren Management, LLC | 243 | $7.05K | 0.00% | +243 | New |
| AdvisorNet Financial, Inc | 257 | $7.45K | 0.00% | +235+1,068.2% | Added |
| Oakworth Capital, Inc. | 271 | $7.86K | 0.00% | 00.0% | Unchanged |
| Steigerwald, Gordon & Koch Inc. | 272 | $7.89K | 0.00% | 00.0% | Unchanged |
| Laurel Wealth Advisors LLC | 275 | $7.97K | 0.00% | +275 | New |
| Murphy & Mullick Capital Management Corp | 283 | $8.21K | 0.01% | −93−24.7% | Reduced |
| Rossby Financial, LCC | 288 | $8.35K | 0.00% | 00.0% | Unchanged |
| Moisand Fitzgerald Tamayo, LLC | 314 | $9.11K | 0.00% | 00.0% | Unchanged |
| LRI Investments, LLC | 332 | $9.63K | 0.00% | 00.0% | Unchanged |
| Y.D. More Investments Ltd | 338 | $9.82K | 0.00% | −182−35.0% | Reduced |
| Larson Financial Group LLC | 354 | $10.3K | 0.00% | +71+25.1% | Added |
| CoreCap Advisors, LLC | 364 | $10.6K | 0.00% | +56+18.2% | Added |
| Winch Advisory Services, LLC | 365 | $10.6K | 0.00% | 00.0% | Unchanged |
| Chesapeake Asset Management LLC | 369 | $10.7K | 0.01% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 399 | $11.6K | 0.00% | +399 | New |
| Covestor Ltd | 409 | $12.0K | 0.01% | 00.0% | Unchanged |
| IFP Advisors, Inc | 432 | $12.5K | 0.00% | +106+32.5% | Added |
| Bartlett & Co. Wealth Management LLC | 484 | $14.0K | 0.00% | 00.0% | Unchanged |
| Sfam, LLC | 487 | $14.1K | 0.01% | +487 | New |
| Global Wealth Strategies & Associates | 493 | $14.3K | 0.00% | 00.0% | Unchanged |
| Thurston, Springer, Miller, Herd & Titak, Inc. | 511 | $14.8K | 0.01% | +246+92.8% | Added |
| Mendota Financial Group, LLC | 515 | $14.9K | 0.01% | 00.0% | Unchanged |
| Rothschild Investment LLC | 525 | $15.2K | 0.00% | +385+275.0% | Added |
| TD Waterhouse Canada Inc. | 530 | $15.4K | 0.00% | −49−8.5% | Reduced |
| Colonial Trust Advisors | 538 | $15.6K | 0.00% | +55+11.4% | Added |
| N.E.W. Advisory Services LLC | 542 | $15.7K | 0.00% | 00.0% | Unchanged |
| Private Trust Co NA | 566 | $16.4K | 0.00% | 00.0% | Unchanged |
| Parkside Financial Bank & Trust | 572 | $16.6K | 0.00% | −17−2.9% | Reduced |
| GWM Advisors LLC | 598 | $17.3K | 0.00% | −3−0.5% | Reduced |
| Evolution Advisers, Inc. | 636 | $18.0K | 0.01% | 00.0% | Unchanged |
| Flagship Harbor Advisors, LLC | 626 | $18.2K | 0.00% | +626 | New |
| Parvin Asset Management, LLC | 643 | $18.6K | 0.02% | +100+18.4% | Added |
| Los Angeles Capital Management LLC | 893 | $19.6K | 0.00% | +893 | New |
| Tower Research Capital LLC (TRC) | 677 | $19.6K | 0.00% | −101−13.0% | Reduced |
| Pinnacle Bancorp, Inc. | 680 | $19.7K | 0.01% | −4−0.6% | Reduced |
| Root Financial Partners, LLC | 694 | $20.1K | 0.00% | −99−12.5% | Reduced |
| First Command Advisory Services, Inc. | 695 | $20.2K | 0.00% | 00.0% | Unchanged |
| Chung Wu Investment Group, LLC | 744 | $21.6K | 0.02% | 00.0% | Unchanged |
| BDF-Gestion | 752 | $21.8K | 0.00% | −51−6.4% | Reduced |
| Steward Partners Investment Advisory, LLC | 754 | $21.9K | 0.00% | +198+35.6% | Added |
| Northwestern Mutual Wealth Management Co | 757 | $22.0K | 0.00% | −272−26.4% | Reduced |
| Ronald Blue Trust, Inc. | 794 | $23.0K | 0.00% | −410−34.1% | Reduced |
| Keating Financial Advisory Services, Inc. | 802 | $23.3K | 0.00% | +802 | New |
| Clearstead Advisors, LLC | 804 | $23.3K | 0.00% | −113−12.3% | Reduced |
| Quent Capital, LLC | 858 | $24.9K | 0.00% | +33+4.0% | Added |
| Strategic Wealth Partners, Ltd. | 898 | $26.0K | 0.00% | +79+9.6% | Added |
| National Bank of Canada | 1,032 | $29.9K | 0.00% | −346−25.1% | Reduced |
| Spire Wealth Management | 1,055 | $30.6K | 0.00% | −79−7.0% | Reduced |
| Korea Investment CORP | 1,166 | $33.8K | 0.00% | 00.0% | Unchanged |
| Whittier Trust Co of Nevada Inc | 1,081 | $34.1K | 0.00% | 00.0% | Unchanged |
| Brown Brothers Harriman & Co | 1,208 | $35.0K | 0.00% | 00.0% | Unchanged |
| Financial Consulate, Inc | 1,300 | $37.7K | 0.01% | +1,300 | New |
| Atlantic Union Bankshares Corp | 1,377 | $39.9K | 0.00% | −98−6.6% | Reduced |
| Salomon & Ludwin, LLC | 1,305 | $41.0K | 0.00% | +648+98.6% | Added |
| Nomura Asset Management Co Ltd | 1,449 | $42.0K | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 1,485 | $43.1K | 0.00% | −360−19.5% | Reduced |
| Global Retirement Partners, LLC | 1,539 | $44.6K | 0.00% | +133+9.5% | Added |
| Sound Income Strategies, LLC | 1,363 | $47.4K | 0.00% | +425+45.3% | Added |
| Atlas Capital Advisors LLC | 1,662 | $48.2K | 0.01% | +1,662 | New |
| Bessemer Group Inc | 1,739 | $50.0K | 0.00% | −82−4.5% | Reduced |
| Asset Planning,Inc | 1,793 | $52.0K | 0.04% | 00.0% | Unchanged |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1,824 | $53.0K | 0.00% | +514+39.2% | Added |
| EverSource Wealth Advisors, LLC | 1,853 | $53.7K | 0.00% | +481+35.1% | Added |
| Vermillion & White Wealth Management Group, LLC | 1,905 | $55.2K | 0.03% | 00.0% | Unchanged |
| HM Payson & Co | 1,941 | $56.3K | 0.00% | +715+58.3% | Added |
| Quarry LP | 2,063 | $59.8K | 0.01% | +1,397+209.8% | Added |
| Smartleaf Asset Management LLC | 2,273 | $66.6K | 0.00% | +131+6.1% | Added |
| Signaturefd, LLC | 2,343 | $67.9K | 0.00% | +145+6.6% | Added |
| Pinnacle Wealth Planning Services, Inc. | 2,384 | $69.1K | 0.01% | +2,384 | New |
| Farther Finance Advisors, LLC | 2,390 | $69.3K | 0.00% | −502−17.4% | Reduced |
| Fifth Third Bancorp | 2,589 | $75.1K | 0.00% | +249+10.6% | Added |
| MetLife Investment Management | 2,606 | $75.6K | 0.00% | −49−1.8% | Reduced |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 2,174 | $76.9K | 0.00% | 00.0% | Unchanged |
| CIBC Private Wealth Group, LLC | 3,139 | $91.0K | 0.00% | −2,161−40.8% | Reduced |
| Kestra Advisory Services, LLC | 3,690 | $107.0K | 0.00% | +3,690 | New |
| STRS Ohio | 3,814 | $110.6K | 0.00% | +7+0.2% | Added |
| Whittier Trust Co | 3,614 | $113.9K | 0.00% | −385−9.6% | Reduced |
| Danske Bank A/S | 3,962 | $114.9K | 0.00% | +3,962 | New |
| MAI Capital Management | 4,001 | $116.0K | 0.00% | +111+2.9% | Added |
| Umb Bank N A | 4,140 | $120.1K | 0.00% | −28−0.7% | Reduced |
| Parallel Advisors, LLC | 4,196 | $121.7K | 0.00% | +32+0.8% | Added |
| Essential Partners LLC | 4,219 | $122.4K | 0.04% | +220+5.5% | Added |