Amentum Holdings, Inc.
AMTM- Exchange
- NYSE
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0002011286
13F holders, Q2 2026
Positions 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
- −22 vs. Q1 2026
- Shares held
- 219.12M
- +8.07M (+3.8%) vs. Q1 2026
- Total value
- $4.35B
- −$928.24M (−17.6%) vs. Q1 2026
Compare with Q1 2026: new holders and sold out
Holders over time
492 in Q3 2024 → 464 in Q2 2026
Institutions
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| AMERICAN SECURITIES LLC | 45,026,743 | $930.7M | 24.79% | 00.0% | Unchanged |
| Invesco Ltd. | 24,954,251 | $515.8M | 0.04% | +3,480,473+16.2% | Added |
| BlackRock, Inc. | 17,906,984 | $370.14M | 0.01% | +65,701+0.4% | Added |
| PRIMECAP MANAGEMENT CO/CA/ | 12,285,504 | $253.94M | 0.15% | +200,210+1.7% | Added |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7,948,385 | $164.29M | 0.01% | +95,434+1.2% | Added |
| VANGUARD CAPITAL MANAGEMENT LLC | 6,711,987 | $138.74M | 0.00% | +61,108+0.9% | Added |
| FMR LLC | 5,679,175 | $117.39M | 0.01% | +100,789+1.8% | Added |
| DIMENSIONAL FUND ADVISORS LP | 5,537,696 | $114.46M | 0.02% | +1,750,276+46.2% | Added |
| STATE STREET CORP | 5,151,772 | $106.49M | 0.00% | +72,731+1.4% | Added |
| FRONTIER CAPITAL MANAGEMENT CO LLC | 4,143,971 | $85.66M | 0.80% | −786,239−15.9% | Reduced |
| Troluce Capital Advisors LLC | 3,565,399 | $73.7M | 27.60% | +2,565,399+256.5% | Added |
| GEODE CAPITAL MANAGEMENT, LLC | 2,716,560 | $56.17M | 0.00% | −97,855−3.5% | Reduced |
| GOLDMAN SACHS GROUP INC | 2,711,866 | $56.05M | 0.01% | +1,580,428+139.7% | Added |
| MORGAN STANLEY | 2,662,329 | $55.03M | 0.00% | +427,416+19.1% | Added |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 2,318,581 | $47.93M | 0.06% | −466,553−16.8% | Reduced |
| THOMPSON SIEGEL & WALMSLEY LLC | 2,281,945 | $47.17M | 0.85% | +756,061+49.5% | Added |
| MILLENNIUM MANAGEMENT LLC | 2,127,779 | $43.98M | 0.03% | +1,496,724+237.2% | Added |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2,120,102 | $43.82M | 0.01% | +52,172+2.5% | Added |
| Thrivent Financial for Lutherans | 2,105,802 | $43.53M | 0.07% | +5,345+0.3% | Added |
| BANK OF AMERICA CORP /DE/ | 2,042,897 | $42.23M | 0.00% | −362,144−15.1% | Reduced |
| Segra Capital Management, LLC | 2,037,890 | $42.12M | 9.68% | +425,164+26.4% | Added |
| Verition Fund Management LLC | 2,019,334 | $41.74M | 0.29% | +721,388+55.6% | Added |
| VAN ECK ASSOCIATES CORP | 1,988,898 | $41.11M | 0.03% | +1,441,254+263.2% | Added |
| Voya Investment Management LLC | 1,974,191 | $40.81M | 0.04% | +774,700+64.6% | Added |
| UBS Group AG | 1,545,183 | $31.94M | 0.01% | −165,592−9.7% | Reduced |
| NORGES BANK | 1,516,193 | $31.34M | 0.00% | +1,516,193 | New |
| Permian Investment Partners, LP | 1,433,028 | $29.62M | 3.36% | −133,972−8.5% | Reduced |
| 683 Capital Management, LLC | 1,100,000 | $22.74M | 2.09% | +325,000+41.9% | Added |
| LOOMIS SAYLES & CO L P | 1,042,522 | $21.55M | 0.03% | −38,814−3.6% | Reduced |
| Qube Research & Technologies Ltd | 1,034,395 | $21.38M | 0.02% | +957,026+1,237.0% | Added |
| NORTHERN TRUST CORP | 1,029,892 | $21.29M | 0.00% | +45,787+4.7% | Added |
| VANGUARD FIDUCIARY TRUST CO | 968,451 | $20.02M | 0.00% | +20,991+2.2% | Added |
| CACTI ASSET MANAGEMENT LLC | 881,692 | $18.22M | 0.91% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 878,084 | $18.15M | 0.00% | −30,515−3.4% | Reduced |
| Russell Investments Group, Ltd. | 840,642 | $17.38M | 0.02% | +126,814+17.8% | Added |
| AVENIR CORP | 811,726 | $16.78M | 2.04% | −29,373−3.5% | Reduced |
| WELLS FARGO & COMPANY/MN | 750,214 | $15.51M | 0.00% | +113,540+17.8% | Added |
| PRINCIPAL FINANCIAL GROUP INC | 742,381 | $15.35M | 0.01% | −2,347−0.3% | Reduced |
| Ancora Advisors, LLC | 715,652 | $14.79M | 0.29% | +12,533+1.8% | Added |
| ROYCE & ASSOCIATES LP | 697,368 | $14.41M | 0.12% | +147,590+26.8% | Added |
| HRT FINANCIAL LP | 671,847 | $13.89M | 0.03% | +671,847 | New |
| CITADEL ADVISORS LLC | 670,684 | $13.86M | 0.01% | +590,046+731.7% | Added |
| Point72 Asset Management, L.P. | 649,984 | $13.44M | 0.02% | −980,579−60.1% | Reduced |
| AQR CAPITAL MANAGEMENT LLC | 601,900 | $12.42M | 0.00% | +94,057+18.5% | Added |
| FIRST TRUST ADVISORS LP | 547,907 | $11.33M | 0.01% | +319,824+140.2% | Added |
| Ruane, Cunniff & Goldfarb L.P. | 537,213 | $11.1M | 0.17% | −1,085,769−66.9% | Reduced |
| Public Sector Pension Investment Board | 528,821 | $10.93M | 0.03% | −20,976−3.8% | Reduced |
| Loews Corp | 500,000 | $10.34M | 0.08% | +500,000 | New |
| SHAPIRO CAPITAL MANAGEMENT LLC | 475,970 | $9.84M | 0.60% | +475,970 | New |
| AWH Capital, L.P. | 470,500 | $9.73M | 3.37% | +235,250+100.0% | Added |
| FIRST NATIONAL BANK OF OMAHA | 475,992 | $9.72M | 0.27% | +227,988+91.9% | Added |
| Legacy Advisors, LLC | 9,065,677 | $9.07M | 0.85% | +1,3990.0% | Added |
| Nuveen, LLC | 421,495 | $8.71M | 0.00% | −450,300−51.7% | Reduced |
| Arvin Capital Management LP | 416,705 | $8.61M | 1.61% | −1,654,495−79.9% | Reduced |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 402,130 | $8.31M | 0.02% | +68,330+20.5% | Added |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 394,370 | $8.15M | 0.15% | +176,590+81.1% | Added |
| BOOTHBAY FUND MANAGEMENT, LLC | 387,973 | $8.02M | 0.15% | +301,781+350.1% | Added |
| De Lisle Partners LLP | 374,818 | $7.74M | 0.85% | −5,000−1.3% | Reduced |
| Vident Advisory, LLC | 372,918 | $7.71M | 0.06% | −15,944−4.1% | Reduced |
| Mawer Investment Management Ltd. | 369,557 | $7.64M | 0.05% | +35,767+10.7% | Added |
| MOORE CAPITAL MANAGEMENT, LP | 365,096 | $7.55M | 0.17% | −508,514−58.2% | Reduced |
| Legal & General Group Plc | 349,048 | $7.21M | 0.00% | +14,152+4.2% | Added |
| JANE STREET GROUP, LLC | 343,687 | $7.1M | 0.00% | +151,708+79.0% | Added |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 332,452 | $6.87M | 0.01% | +2,403+0.7% | Added |
| CenterBook Partners LP | 328,766 | $6.8M | 0.33% | +185,068+128.8% | Added |
| AMERIPRISE FINANCIAL INC | 319,479 | $6.6M | 0.00% | −10,266−3.1% | Reduced |
| GRIZZLYROCK CAPITAL, LLC | 318,363 | $6.58M | 4.60% | +29,250+10.1% | Added |
| Swiss National Bank | 318,091 | $6.57M | 0.00% | +4,700+1.5% | Added |
| Rovida Investment Management Ltd | 315,000 | $6.5M | 0.44% | 00.0% | Unchanged |
| Aristotle Capital Boston, LLC | 307,836 | $6.36M | 0.43% | −37,140−10.8% | Reduced |
| EXCHANGE TRADED CONCEPTS, LLC | 305,286 | $6.31M | 0.03% | +10,278+3.5% | Added |
| TWO SIGMA INVESTMENTS, LP | 284,268 | $5.88M | 0.00% | −615,909−68.4% | Reduced |
| RHUMBLINE ADVISERS | 284,060 | $5.87M | 0.00% | −16,233−5.4% | Reduced |
| FIFTH THIRD BANCORP | 281,815 | $5.83M | 0.01% | +8,499+3.1% | Added |
| CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM | 266,383 | $5.51M | 0.00% | −10,669−3.9% | Reduced |
| SG Americas Securities, LLC | 262,993 | $5.44M | 0.00% | −11,609−4.2% | Reduced |
| Hudson Value Partners, LLC | 250,185 | $5.17M | 1.30% | +46,275+22.7% | Added |
| UBS ASSET MANAGEMENT AMERICAS INC | 249,725 | $5.16M | 0.00% | +1,768+0.7% | Added |
| CSM Advisors, LLC | 243,814 | $5.04M | 0.11% | +162,573+200.1% | Added |
| ExodusPoint Capital Management, LP | 226,289 | $4.68M | 0.04% | +226,289 | New |
| RAYMOND JAMES FINANCIAL INC | 224,399 | $4.64M | 0.00% | −21,425−8.7% | Reduced |
| Hel Ved Capital Management Ltd | 214,000 | $4.42M | 0.62% | +35,500+19.9% | Added |
| D. E. Shaw & Co., Inc. | 191,488 | $3.96M | 0.00% | +125,317+189.4% | Added |
| SEI INVESTMENTS CO | 190,069 | $3.93M | 0.00% | −104,599−35.5% | Reduced |
| WEDGE CAPITAL MANAGEMENT L L P/NC | 187,832 | $3.88M | 0.06% | +23,166+14.1% | Added |
| Verbena Value LP | 186,200 | $3.85M | 0.64% | +186,200 | New |
| Telos Capital Management, Inc. | 185,611 | $3.84M | 0.34% | −4,290−2.3% | Reduced |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 183,223 | $3.79M | 0.00% | −1,332−0.7% | Reduced |
| North Growth Management Ltd. | 173,000 | $3.57M | 0.46% | +1,000+0.6% | Added |
| OpenArc Corporate Advisory, LLC | 170,291 | $3.52M | 0.04% | −610.0% | Reduced |
| Brevan Howard Capital Management LP | 167,354 | $3.46M | 0.05% | +90,158+116.8% | Added |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM | 161,992 | $3.35M | 0.01% | −3,337−2.0% | Reduced |
| Atom Investors LP | 160,876 | $3.33M | 0.30% | +138,061+605.1% | Added |
| Gotham Asset Management, LLC | 156,113 | $3.23M | 0.01% | −364,928−70.0% | Reduced |
| PRICE T ROWE ASSOCIATES INC /MD/ | 152,081 | $3.15M | 0.00% | +6,828+4.7% | Added |
| BARCLAYS PLC | 151,780 | $3.14M | 0.00% | +104,965+224.2% | Added |
| Soviero Asset Management, LP | 150,000 | $3.1M | 1.50% | −90,000−37.5% | Reduced |
| OPPENHEIMER & CO INC | 142,974 | $2.96M | 0.03% | −25,898−15.3% | Reduced |
| WSFS CAPITAL MANAGEMENT, LLC | 141,443 | $2.92M | 0.13% | +24,572+21.0% | Added |
| PRUDENTIAL FINANCIAL INC | 139,950 | $2.89M | 0.00% | −480−0.3% | Reduced |