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 |
|---|---|---|---|---|---|
| Whittier Trust Co | 3,614 | $97.8K | 0.00% | 00.0% | Unchanged |
| Horizon Investments, LLC | 3,723 | $97.1K | 0.00% | +3,723 | New |
| Pinnacle Wealth Planning Services, Inc. | 3,140 | $81.9K | 0.01% | +756+31.7% | Added |
| Caitong International Asset Management Co., Ltd | 2,937 | $76.6K | 0.01% | +2,937 | New |
| PEAK6 LLC | 2,783 | $72.6K | 0.00% | +2,783 | New |
| Nomura Asset Management Co Ltd | 2,700 | $70.4K | 0.00% | +1,251+86.3% | Added |
| Farther Finance Advisors, LLC | 2,650 | $69.8K | 0.00% | +260+10.9% | Added |
| MetLife Investment Management | 2,609 | $68.0K | 0.00% | +3+0.1% | Added |
| Advisory Services Network, LLC | 2,586 | $67.4K | 0.00% | +2,586 | New |
| Quarry LP | 2,550 | $66.5K | 0.01% | +487+23.6% | Added |
| Umb Bank N A | 2,501 | $65.2K | 0.00% | −1,639−39.6% | Reduced |
| Covestor Ltd | 2,374 | $62.0K | 0.04% | +1,965+480.4% | Added |
| Signaturefd, LLC | 2,334 | $60.9K | 0.00% | −9−0.4% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 2,327 | $60.7K | 0.00% | +503+27.6% | Added |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 2,174 | $57.2K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 2,010 | $52.4K | 0.00% | +1,333+196.9% | Added |
| HM Payson & Co | 1,941 | $50.6K | 0.00% | 00.0% | Unchanged |
| Atlas Capital Advisors LLC | 1,805 | $47.1K | 0.01% | +143+8.6% | Added |
| Asset Planning,Inc | 1,793 | $46.8K | 0.03% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 1,661 | $42.7K | 0.00% | −2,700−61.9% | Reduced |
| Financial Consulate, Inc | 1,550 | $40.4K | 0.01% | +250+19.2% | Added |
| EverSource Wealth Advisors, LLC | 1,532 | $40.0K | 0.00% | −321−17.3% | Reduced |
| Federation des caisses Desjardins du Quebec | 1,459 | $38.0K | 0.00% | −26−1.8% | Reduced |
| Sound Income Strategies, LLC | 1,361 | $35.8K | 0.00% | −2−0.1% | Reduced |
| Atlantic Union Bankshares Corp | 1,373 | $35.8K | 0.00% | −4−0.3% | Reduced |
| Salomon & Ludwin, LLC | 1,305 | $35.3K | 0.00% | 00.0% | Unchanged |
| Newbridge Financial Services Group, Inc. | 1,350 | $35.2K | 0.01% | +1,350 | New |
| Mather Group, LLC. | 1,349 | $35.2K | 0.00% | +1,349 | New |
| Brown Brothers Harriman & Co | 1,221 | $31.8K | 0.00% | +13+1.1% | Added |
| Whittier Trust Co of Nevada Inc | 1,081 | $29.3K | 0.00% | 00.0% | Unchanged |
| Smartleaf Asset Management LLC | 1,045 | $26.3K | 0.00% | −1,228−54.0% | Reduced |
| Parvin Asset Management, LLC | 1,003 | $26.2K | 0.02% | +360+56.0% | Added |
| Los Angeles Capital Management LLC | 893 | $23.3K | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 892 | $23.3K | 0.00% | +890+44,500.0% | Added |
| Spire Wealth Management | 846 | $22.1K | 0.00% | −209−19.8% | Reduced |
| Strategic Wealth Partners, Ltd. | 824 | $21.5K | 0.00% | −74−8.2% | Reduced |
| Korea Investment CORP | 781 | $20.4K | 0.00% | −385−33.0% | Reduced |
| Root Financial Partners, LLC | 773 | $20.2K | 0.00% | +79+11.4% | Added |
| Keating Financial Advisory Services, Inc. | 770 | $20.1K | 0.00% | −32−4.0% | Reduced |
| Northwestern Mutual Wealth Management Co | 765 | $20.0K | 0.00% | +8+1.1% | Added |
| BDF-Gestion | 752 | $19.6K | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 751 | $19.6K | 0.00% | −3−0.4% | Reduced |
| Chung Wu Investment Group, LLC | 744 | $19.4K | 0.02% | 00.0% | Unchanged |
| First Command Advisory Services, Inc. | 695 | $18.1K | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 680 | $17.7K | 0.00% | +82+13.7% | Added |
| MBM Wealth Consultants, LLC | 678 | $17.7K | 0.00% | +678 | New |
| Evolution Advisers, Inc. | 636 | $16.0K | 0.01% | 00.0% | Unchanged |
| Quent Capital, LLC | 610 | $15.9K | 0.00% | −248−28.9% | Reduced |
| Parkside Financial Bank & Trust | 548 | $14.3K | 0.00% | −24−4.2% | Reduced |
| N.E.W. Advisory Services LLC | 542 | $14.1K | 0.00% | 00.0% | Unchanged |
| Ronald Blue Trust, Inc. | 540 | $14.1K | 0.00% | −254−32.0% | Reduced |
| Colonial Trust Advisors | 538 | $14.0K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 511 | $13.3K | 0.00% | −14−2.7% | Reduced |
| Global Wealth Strategies & Associates | 493 | $12.9K | 0.00% | 00.0% | Unchanged |
| Sfam, LLC | 487 | $12.7K | 0.01% | 00.0% | Unchanged |
| Bartlett & Co. Wealth Management LLC | 484 | $12.5K | 0.00% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 399 | $10.4K | 0.00% | 00.0% | Unchanged |
| Private Trust Co NA | 385 | $10.0K | 0.00% | −181−32.0% | Reduced |
| Chesapeake Asset Management LLC | 369 | $9.62K | 0.01% | 00.0% | Unchanged |
| Golden State Equity Partners | 357 | $9.31K | 0.00% | +357 | New |
| IFP Advisors, Inc | 352 | $9.18K | 0.00% | −80−18.5% | Reduced |
| CoreCap Advisors, LLC | 351 | $9.15K | 0.00% | −13−3.6% | Reduced |
| Larson Financial Group LLC | 342 | $8.92K | 0.00% | −12−3.4% | Reduced |
| Twin Peaks Wealth Advisors, LLC | 339 | $8.84K | 0.00% | +339 | New |
| Y.D. More Investments Ltd | 336 | $8.72K | 0.00% | −2−0.6% | Reduced |
| LRI Investments, LLC | 332 | $8.66K | 0.00% | 00.0% | Unchanged |
| Bare Financial Services, Inc | 322 | $8.40K | 0.00% | +322 | New |
| Moisand Fitzgerald Tamayo, LLC | 314 | $8.19K | 0.00% | 00.0% | Unchanged |
| Rossby Financial, LCC | 288 | $7.59K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 284 | $7.41K | 0.00% | +113+66.1% | Added |
| Murphy & Mullick Capital Management Corp | 283 | $7.38K | 0.01% | 00.0% | Unchanged |
| Steigerwald, Gordon & Koch Inc. | 272 | $7.09K | 0.00% | 00.0% | Unchanged |
| Oakworth Capital, Inc. | 271 | $7.07K | 0.00% | 00.0% | Unchanged |
| AdvisorNet Financial, Inc | 257 | $6.70K | 0.00% | 00.0% | Unchanged |
| Golden State Wealth Management, LLC | 246 | $6.42K | 0.00% | +85+52.8% | Added |
| Clearstead Advisors, LLC | 233 | $6.08K | 0.00% | −571−71.0% | Reduced |
| DT Investment Partners, LLC | 230 | $6.00K | 0.00% | 00.0% | Unchanged |
| Financial Management Professionals, Inc. | 228 | $5.95K | 0.00% | 00.0% | Unchanged |
| Pinnacle Bancorp, Inc. | 221 | $5.76K | 0.00% | −459−67.5% | Reduced |
| Perkins Coie Trust Co | 219 | $5.71K | 0.00% | 00.0% | Unchanged |
| Old Second National Bank of Aurora | 212 | $5.53K | 0.00% | 00.0% | Unchanged |
| Intentional Wealth Strategies, LLC | 210 | $5.48K | 0.01% | +210 | New |
| Bellevue Asset Management, LLC | 197 | $5.14K | 0.00% | 00.0% | Unchanged |
| Sachetta, LLC | 194 | $5.06K | 0.00% | 00.0% | Unchanged |
| Glen Eagle Advisors, LLC | 184 | $4.80K | 0.00% | −42−18.6% | Reduced |
| Cromwell Holdings LLC | 184 | $4.80K | 0.00% | 00.0% | Unchanged |
| Medallion Wealth Advisors, LLC | 180 | $4.69K | 0.00% | 00.0% | Unchanged |
| Elevated Capital Advisors, LLC | 177 | $4.62K | 0.00% | 00.0% | Unchanged |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 170 | $4.43K | 0.00% | 00.0% | Unchanged |
| Geneos Wealth Management Inc. | 170 | $4.43K | 0.00% | 00.0% | Unchanged |
| Atlantic Edge Private Wealth Management, LLC | 164 | $4.28K | 0.00% | 00.0% | Unchanged |
| Cassaday & Co Wealth Management LLC | 164 | $4.28K | 0.00% | +164 | New |
| True Wealth Design, LLC | 160 | $4.17K | 0.00% | −9−5.3% | Reduced |
| Assetmark, Inc | 148 | $3.86K | 0.00% | +6+4.2% | Added |
| TD Private Client Wealth LLC | 143 | $3.73K | 0.00% | −1−0.7% | Reduced |
| Huntington National Bank | 139 | $3.63K | 0.00% | +14+11.2% | Added |
| Central Trust Co | 136 | $3.55K | 0.00% | −58−29.9% | Reduced |
| McIlrath & Eck, LLC | 136 | $3.55K | 0.00% | 00.0% | Unchanged |
| Rakuten Securities, Inc. | 136 | $3.55K | 0.00% | +95+231.7% | Added |
| Brown, Lisle/Cummings, Inc. | 122 | $3.18K | 0.00% | +69+130.2% | Added |