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 2026
Institutional positions in Amentum Holdings, Inc. as of Mar 31, 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
- 486
- +10 vs. Q4 2025
- Shares held
- 211.1M
- +25.3M (+13.6%) vs. Q4 2025
- Total value
- $5.28B
- +$162.1M (+3.2%) vs. Q4 2025
- New holders
- 70
- 151 more added
- Sold out
- 60
- 152 more reduced
7 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Glen Eagle Advisors, LLC | 184 | $4.80K | 0.00% | −42−18.6% | Reduced |
| Cromwell Holdings LLC | 184 | $4.80K | 0.00% | 00.0% | Unchanged |
| Sachetta, LLC | 194 | $5.06K | 0.00% | 00.0% | Unchanged |
| Bellevue Asset Management, LLC | 197 | $5.14K | 0.00% | 00.0% | Unchanged |
| Intentional Wealth Strategies, LLC | 210 | $5.48K | 0.01% | +210 | New |
| Old Second National Bank of Aurora | 212 | $5.53K | 0.00% | 00.0% | Unchanged |
| Perkins Coie Trust Co | 219 | $5.71K | 0.00% | 00.0% | Unchanged |
| Pinnacle Bancorp, Inc. | 221 | $5.76K | 0.00% | −459−67.5% | Reduced |
| Financial Management Professionals, Inc. | 228 | $5.95K | 0.00% | 00.0% | Unchanged |
| DT Investment Partners, LLC | 230 | $6.00K | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 233 | $6.08K | 0.00% | −571−71.0% | Reduced |
| Golden State Wealth Management, LLC | 246 | $6.42K | 0.00% | +85+52.8% | Added |
| AdvisorNet Financial, Inc | 257 | $6.70K | 0.00% | 00.0% | Unchanged |
| Oakworth Capital, Inc. | 271 | $7.07K | 0.00% | 00.0% | Unchanged |
| Steigerwald, Gordon & Koch Inc. | 272 | $7.09K | 0.00% | 00.0% | Unchanged |
| Murphy & Mullick Capital Management Corp | 283 | $7.38K | 0.01% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 284 | $7.41K | 0.00% | +113+66.1% | Added |
| Rossby Financial, LCC | 288 | $7.59K | 0.00% | 00.0% | Unchanged |
| Moisand Fitzgerald Tamayo, LLC | 314 | $8.19K | 0.00% | 00.0% | Unchanged |
| Bare Financial Services, Inc | 322 | $8.40K | 0.00% | +322 | New |
| LRI Investments, LLC | 332 | $8.66K | 0.00% | 00.0% | Unchanged |
| Y.D. More Investments Ltd | 336 | $8.72K | 0.00% | −2−0.6% | Reduced |
| Twin Peaks Wealth Advisors, LLC | 339 | $8.84K | 0.00% | +339 | New |
| Larson Financial Group LLC | 342 | $8.92K | 0.00% | −12−3.4% | Reduced |
| CoreCap Advisors, LLC | 351 | $9.15K | 0.00% | −13−3.6% | Reduced |
| IFP Advisors, Inc | 352 | $9.18K | 0.00% | −80−18.5% | Reduced |
| Golden State Equity Partners | 357 | $9.31K | 0.00% | +357 | New |
| Chesapeake Asset Management LLC | 369 | $9.62K | 0.01% | 00.0% | Unchanged |
| Private Trust Co NA | 385 | $10.0K | 0.00% | −181−32.0% | Reduced |
| Basecamp Wealth Advisors LLC | 399 | $10.4K | 0.00% | 00.0% | Unchanged |
| Bartlett & Co. Wealth Management LLC | 484 | $12.5K | 0.00% | 00.0% | Unchanged |
| Sfam, LLC | 487 | $12.7K | 0.01% | 00.0% | Unchanged |
| Global Wealth Strategies & Associates | 493 | $12.9K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 511 | $13.3K | 0.00% | −14−2.7% | Reduced |
| Colonial Trust Advisors | 538 | $14.0K | 0.00% | 00.0% | Unchanged |
| Ronald Blue Trust, Inc. | 540 | $14.1K | 0.00% | −254−32.0% | Reduced |
| N.E.W. Advisory Services LLC | 542 | $14.1K | 0.00% | 00.0% | Unchanged |
| Parkside Financial Bank & Trust | 548 | $14.3K | 0.00% | −24−4.2% | Reduced |
| Quent Capital, LLC | 610 | $15.9K | 0.00% | −248−28.9% | Reduced |
| Evolution Advisers, Inc. | 636 | $16.0K | 0.01% | 00.0% | Unchanged |
| MBM Wealth Consultants, LLC | 678 | $17.7K | 0.00% | +678 | New |
| GWM Advisors LLC | 680 | $17.7K | 0.00% | +82+13.7% | Added |
| First Command Advisory Services, Inc. | 695 | $18.1K | 0.00% | 00.0% | Unchanged |
| Chung Wu Investment Group, LLC | 744 | $19.4K | 0.02% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 751 | $19.6K | 0.00% | −3−0.4% | Reduced |
| BDF-Gestion | 752 | $19.6K | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 765 | $20.0K | 0.00% | +8+1.1% | Added |
| Keating Financial Advisory Services, Inc. | 770 | $20.1K | 0.00% | −32−4.0% | Reduced |
| Root Financial Partners, LLC | 773 | $20.2K | 0.00% | +79+11.4% | Added |
| Korea Investment CORP | 781 | $20.4K | 0.00% | −385−33.0% | Reduced |
| Strategic Wealth Partners, Ltd. | 824 | $21.5K | 0.00% | −74−8.2% | Reduced |
| Spire Wealth Management | 846 | $22.1K | 0.00% | −209−19.8% | Reduced |
| Harbour Investments, Inc. | 892 | $23.3K | 0.00% | +890+44,500.0% | Added |
| Los Angeles Capital Management LLC | 893 | $23.3K | 0.00% | 00.0% | Unchanged |
| Parvin Asset Management, LLC | 1,003 | $26.2K | 0.02% | +360+56.0% | Added |
| Smartleaf Asset Management LLC | 1,045 | $26.3K | 0.00% | −1,228−54.0% | Reduced |
| Whittier Trust Co of Nevada Inc | 1,081 | $29.3K | 0.00% | 00.0% | Unchanged |
| Brown Brothers Harriman & Co | 1,221 | $31.8K | 0.00% | +13+1.1% | Added |
| Mather Group, LLC. | 1,349 | $35.2K | 0.00% | +1,349 | New |
| Newbridge Financial Services Group, Inc. | 1,350 | $35.2K | 0.01% | +1,350 | New |
| Salomon & Ludwin, LLC | 1,305 | $35.3K | 0.00% | 00.0% | Unchanged |
| Atlantic Union Bankshares Corp | 1,373 | $35.8K | 0.00% | −4−0.3% | Reduced |
| Sound Income Strategies, LLC | 1,361 | $35.8K | 0.00% | −2−0.1% | Reduced |
| Federation des caisses Desjardins du Quebec | 1,459 | $38.0K | 0.00% | −26−1.8% | Reduced |
| EverSource Wealth Advisors, LLC | 1,532 | $40.0K | 0.00% | −321−17.3% | Reduced |
| Financial Consulate, Inc | 1,550 | $40.4K | 0.01% | +250+19.2% | Added |
| SRS Capital Advisors, Inc. | 1,661 | $42.7K | 0.00% | −2,700−61.9% | Reduced |
| Asset Planning,Inc | 1,793 | $46.8K | 0.03% | 00.0% | Unchanged |
| Atlas Capital Advisors LLC | 1,805 | $47.1K | 0.01% | +143+8.6% | Added |
| HM Payson & Co | 1,941 | $50.6K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 2,010 | $52.4K | 0.00% | +1,333+196.9% | Added |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 2,174 | $57.2K | 0.00% | 00.0% | Unchanged |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2,327 | $60.7K | 0.00% | +503+27.6% | Added |
| Signaturefd, LLC | 2,334 | $60.9K | 0.00% | −9−0.4% | Reduced |
| Covestor Ltd | 2,374 | $62.0K | 0.04% | +1,965+480.4% | Added |
| Umb Bank N A | 2,501 | $65.2K | 0.00% | −1,639−39.6% | Reduced |
| Quarry LP | 2,550 | $66.5K | 0.01% | +487+23.6% | Added |
| Advisory Services Network, LLC | 2,586 | $67.4K | 0.00% | +2,586 | New |
| MetLife Investment Management | 2,609 | $68.0K | 0.00% | +3+0.1% | Added |
| Farther Finance Advisors, LLC | 2,650 | $69.8K | 0.00% | +260+10.9% | Added |
| Nomura Asset Management Co Ltd | 2,700 | $70.4K | 0.00% | +1,251+86.3% | Added |
| PEAK6 LLC | 2,783 | $72.6K | 0.00% | +2,783 | New |
| Caitong International Asset Management Co., Ltd | 2,937 | $76.6K | 0.01% | +2,937 | New |
| Pinnacle Wealth Planning Services, Inc. | 3,140 | $81.9K | 0.01% | +756+31.7% | Added |
| Horizon Investments, LLC | 3,723 | $97.1K | 0.00% | +3,723 | New |
| Whittier Trust Co | 3,614 | $97.8K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 3,808 | $99.3K | 0.00% | −6−0.2% | Reduced |
| Walleye Capital LLC | 3,827 | $99.8K | 0.00% | +3,716+3,347.7% | Added |
| Essential Partners LLC | 4,212 | $109.8K | 0.04% | −7−0.2% | Reduced |
| Rockefeller Capital Management L.P. | 4,251 | $110.9K | 0.00% | −161−3.6% | Reduced |
| Parallel Advisors, LLC | 4,295 | $112.0K | 0.00% | +99+2.4% | Added |
| TD Waterhouse Canada Inc. | 4,448 | $117.2K | 0.00% | +3,918+739.2% | Added |
| KBC Group NV | 5,431 | $142.0K | 0.00% | −417−7.1% | Reduced |
| GAMMA Investing LLC | 5,659 | $147.6K | 0.01% | +354+6.7% | Added |
| Acadian Asset Management LLC | 5,957 | $155.0K | 0.00% | −2,242−27.3% | Reduced |
| MAI Capital Management | 6,094 | $158.9K | 0.00% | +2,093+52.3% | Added |
| BOK Financial Private Wealth, Inc. | 6,124 | $159.7K | 0.01% | −786−11.4% | Reduced |
| FRG Family Wealth Advisors LLC | 7,831 | $204.2K | 0.03% | −33−0.4% | Reduced |
| CAPROCK Group, Inc. | 7,842 | $204.5K | 0.00% | −1,468−15.8% | Reduced |
| Strategic Equity Management | 7,844 | $204.6K | 0.08% | +7,844 | New |