Amentum HoldingsAMTM
13F holders, Q4 2024 (December 31)451holders −41
116new positions
184sold out
6famous investors
$21.05avg. 13F price*
At the end of Q4 2024, 451 institutions reported holding Amentum Holdings Inc. (AMTM) in their 13F filings, down 41 from Q3 2024. 116 opened new positions and 184 sold out. The largest holders were American Securities LLC ($923.1M), BlackRock, Inc. ($352.8M) and Vanguard Group Inc. ($347.9M). 6 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Steve Cohen (0.0% of Point72 Asset Management's portfolio).
- Company
- Amentum Holdings Inc.
- CUSIP
- 023939101
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2024 → Q4 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 116 | $247.6M |
| Exits | 184 | $575.5M |
All 13F filers, Q3 2024 → Q4 2024: 50,643,809 shares bought and 30,938,541 shares sold, net +19,705,268 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 451 holders
| American Securities LLC | 100.00% | — | 43,893,904 | $923.1M |
| BlackRock, Inc. | 0.01% | Add +88.1% | 16,774,771 | $352.8M |
| Vanguard Group Inc. | 0.01% | Add +18.1% | 16,542,447 | $347.9M |
| Invesco Ltd. | 0.05% | Add +77.6% | 13,856,239 | $291.4M |
| State Street Corp. | 0.01% | Reduce -11.9% | 6,454,253 | $135.7M |
| Primecap Management Co. | 0.10% | Add +21.7% | 6,414,379 | $134.9M |
| Cooper Creek Partners Management LLC | 2.70% | Add +396.3% | 4,157,034 | $87.4M |
| NorthCoast Asset Management LLC | 0.33% | Add +2234.6% | 3,152,262 | $66.3M |
| Allspring Global Investments Holdings, LLC | 0.08% | Reduce -0.4% | 2,420,967 | $52.4M |
| Ruane, Cunniff & Goldfarb L.P. | 0.87% | Reduce -3.7% | 2,436,294 | $51.2M |
| FMR LLC | 0.00% | Add +2919.7% | 2,395,053 | $50.4M |
| Wellington Management Group LLP | 0.01% | Add +149.5% | 2,333,221 | $49.1M |
| Geode Capital Management, LLC | 0.00% | Reduce -37.6% | 1,963,248 | $41.3M |
| Thompson Siegel & Walmsley LLC | 0.64% | Add +469.4% | 1,948,684 | $41.0M |
| FIL Ltd | 0.04% | Add +144.0% | 1,793,553 | $37.7M |
| Thrivent Financial for Lutherans | 0.07% | Add +201.0% | 1,611,796 | $33.9M |
| Morgan Stanley | 0.00% | Add +44.4% | 1,482,521 | $31.2M |
| Norges Bank | 0.00% | New | 1,440,127 | $30.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +66.2% | 1,264,257 | $26.6M |
| Millennium Management | 0.02% | Add +78.1% | 1,196,574 | $25.2M |
| Dimensional Fund Advisors LP | 0.01% | Reduce -8.3% | 1,154,130 | $24.3M |
| Van Eck Associates Corp. | 0.03% | New | 1,132,285 | $23.8M |
| UBS Group AG | 0.01% | Add +165.3% | 1,131,744 | $23.8M |
| Castalian Partners, LLC | 19.87% | — | 1,000,000 | $21.0M |
| Arvin Capital Management LP | 8.15% | New | 965,197 | $20.3M |
| Susquehanna International Group, LLP | 0.03% | Add +1688.5% | 876,361 | $18.4M |
| Cacti Asset Management LLC | 1.38% | New | 824,464 | $18.4M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.04% | Add +4.5% | 869,596 | $18.3M |
| Northern Trust Corp. | 0.00% | Add +467.1% | 842,219 | $17.7M |
| Kopernik Global Investors, LLC | 1.72% | New | 765,982 | $16.1M |
| Legal & General Group Plc | 0.00% | Add +2.8% | 678,103 | $14.3M |
| Bank of New York Mellon Corp | 0.00% | Reduce -16.0% | 651,314 | $13.7M |
| CI Investments Inc. | 0.05% | Reduce -34.0% | 643,115 | $13.5M |
| CSM Advisors, LLC | 0.63% | Add +646.4% | 639,057 | $13.4M |
| Engine Capital Management, LP | 2.39% | New | 621,400 | $13.1M |
| Royal Bank of Canada | 0.00% | Add +85.7% | 618,903 | $13.0M |
| Bank of America Corp. | 0.00% | Reduce -63.6% | 608,845 | $12.8M |
| Principal Financial Group Inc. | 0.01% | Add +313.6% | 602,049 | $12.7M |
| Moore Capital Management, LP | 0.25% | New | 592,190 | $12.5M |
| Aristotle Capital Boston, LLC | 0.37% | Add +944.2% | 476,977 | $10.0M |
| Discovery Capital Management, LLC / CT | 0.68% | New | 465,300 | $9.8M |
| Voss Capital, LP | 0.70% | New | 449,818 | $9.5M |
| Penn Capital Management Company, LLC | 0.92% | New | 446,308 | $9.4M |
| 683 Capital Management, LLC | 0.98% | New | 425,000 | $8.9M |
| Voya Investment Management LLC | 0.01% | New | 404,115 | $8.5M |
| Citadel Advisors | 0.01% | Reduce -17.9% | 394,822 | $8.3M |
| New York State Common Retirement Fund | 0.01% | Add +382.6% | 378,952 | $8.0M |
| Ameriprise Financial Inc. | 0.00% | Reduce -13.0% | 359,227 | $7.6M |
| Arosa Capital Management LP | 4.90% | New | 350,000 | $7.4M |
| Citigroup Inc. | 0.01% | Add +185.4% | 327,762 | $6.9M |
| Verition Fund Management LLC | 0.04% | New | 320,916 | $6.7M |
| Public Sector Pension Investment Board | 0.03% | New | 309,186 | $6.5M |
| Nuveen Asset Management, LLC | 0.00% | Reduce -30.4% | 303,885 | $6.4M |
| Rhumbline Advisers | 0.01% | Add +33.0% | 295,184 | $6.2M |
| Sei Investments Co. | 0.01% | Add +17.9% | 287,313 | $6.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -59.4% | 273,734 | $5.8M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -65.2% | 272,225 | $5.7M |
| Telos Capital Management, Inc. | 0.60% | Add +202.4% | 267,036 | $5.6M |
| Swiss National Bank | 0.00% | Reduce -15.9% | 263,200 | $5.5M |
| Simplex Trading, LLC | 0.13% | New | 219,981 | $4.6M |
| Focus Partners Wealth | 0.01% | Reduce -26.8% | 201,344 | $4.2M |
| California Public Employees Retirement System | 0.00% | Reduce -22.9% | 197,519 | $4.2M |
| Avenir Corp. | 0.42% | New | 193,470 | $4.1M |
| Mesirow Financial Investment Management, Inc. | 0.07% | Reduce -4.9% | 176,931 | $3.7M |
| Barclays PLC | 0.00% | Add +6.2% | 169,651 | $3.6M |
| Hutchinson Capital Management | 0.58% | Reduce -2.1% | 145,490 | $3.1M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +76.5% | 145,471 | $3.1M |
| California State Teachers Retirement System | 0.00% | Reduce -39.3% | 131,419 | $2.8M |
| Point72 Asset Management | 0.01% | Add +2003.2% | 126,382 | $2.7M |
| Russell Investments Group, Ltd. | 0.00% | Add +62.2% | 125,538 | $2.6M |
| Pacific Capital Partners Ltd | 1.55% | New | 125,000 | $2.6M |
| New York State Teachers Retirement System | 0.01% | Add +6.9% | 124,122 | $2.6M |
| Prudential Financial Inc. | 0.00% | Add +55.7% | 122,574 | $2.6M |
| HSBC Holdings PLC | 0.00% | Reduce -32.0% | 119,517 | $2.5M |
| D. E. Shaw & Co. | 0.00% | Add +38.8% | 119,936 | $2.5M |
| LPL Financial LLC | 0.00% | Add +14.1% | 118,782 | $2.5M |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -5.2% | 114,744 | $2.4M |
| State Board of Administration of Florida Retirement System | 0.00% | Reduce -13.5% | 114,636 | $2.4M |
| JPMorgan Chase & Co. | 0.00% | Reduce -58.0% | 113,674 | $2.4M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -64.7% | 112,223 | $2.4M |
| Caption Management, LLC | 0.10% | New | 109,851 | $2.3M |
| Centiva Capital, LP | 0.08% | New | 104,140 | $2.2M |
| United Capital Financial Advisors, LLC | 0.02% | Reduce -21.6% | 102,313 | $2.2M |
| Two Point Capital Management, Inc. | 0.74% | New | 88,129 | $2.1M |
| State of New Jersey Common Pension Fund D | 0.01% | Add +120.8% | 95,677 | $2.0M |
| Tower Bridge Advisors | 0.21% | Reduce -25.4% | 93,732 | $2.0M |
| Crestwood Advisors Group, LLC | 0.04% | Add +16.8% | 93,522 | $2.0M |
| North Growth Management Ltd. | 0.36% | Reduce -2.1% | 91,000 | $1.9M |
| Cinctive Capital Management LP | 0.10% | New | 91,085 | $1.9M |
| XTX Topco Ltd | 0.16% | Add +1118.4% | 90,065 | $1.9M |
| Wells Fargo & Company | 0.00% | Reduce -67.1% | 89,561 | $1.9M |
| Teacher Retirement System of Texas | 0.01% | New | 86,692 | $1.8M |
| Group One Trading LLC | 0.06% | Add +8109.5% | 86,036 | $1.8M |
| Raymond James Financial Inc. | 0.00% | — | 85,562 | $1.8M |
| AQR Capital Management | 0.00% | Reduce -86.8% | 84,357 | $1.8M |
| Lathrop Investment Management Co. | 0.34% | Reduce -33.9% | 84,044 | $1.8M |
| Neville Rodie & Shaw Inc. | 0.12% | Reduce -10.0% | 80,999 | $1.7M |
| Washington Trust Advisors, Inc. | 0.14% | Reduce -37.4% | 80,240 | $1.7M |
| Hahn Capital Management LLC | 0.71% | Add +47.9% | 77,322 | $1.6M |
| Cerity Partners LLC | 0.00% | Reduce -14.0% | 69,523 | $1.6M |
"% of holder's portfolio" is AMTM's weight in each manager's 13F, not the share of Amentum Holdings Inc. the manager owns.