AMTM · Company research
Amentum Holdings, Inc. (AMTM): Ownership & Institutional Holders
Reported institutional positions. Filing dates and sources matter.
RESEARCH CONTEXT
Understand the numbers
Reported institutional positions. Filing dates and sources matter. Use period, currency, units and source fields when interpreting values.
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Ownership & Institutional Holders data
Database-backed records only
| holder name | cik | period end | shares held | market value | ownership percent | shares change | shares change percent | filing date | data source |
|---|---|---|---|---|---|---|---|---|---|
| Parallel Advisors, LLC | 1690010 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3948 | 81605 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| BANK OF MONTREAL /CAN/ | 927971 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10438 | 215753 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Rakuten Securities, Inc. | 2009539 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 55 | 1137 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Holocene Advisors, LP | 1700574 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 89037 | 1840395 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Sachetta, LLC | 2010574 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 194 | 4010 | — | — | — | Jul 15, 2026 | SEC_13F_DATASET |
| Mawer Investment Management Ltd. | 1538449 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 369557 | 7638743 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Bare Financial Services, Inc | 2009426 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 254 | 5250 | — | — | — | Jul 27, 2026 | SEC_13F_DATASET |
| Y.D. More Investments Ltd | 1870364 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 158 | 3263 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| Cromwell Holdings LLC | 1894712 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 111 | 2294 | — | — | — | Jul 14, 2026 | SEC_13F_DATASET |
| Caitong International Asset Management Co., Ltd | 1963355 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15239 | 314990 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| Moisand Fitzgerald Tamayo, LLC | 1649107 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 314 | 6491 | — | — | — | Jul 13, 2026 | SEC_13F_DATASET |
| BELLEVUE ASSET MANAGEMENT, LLC | 1801619 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 197 | 4071 | — | — | — | Aug 4, 2026 | SEC_13F_DATASET |
| JONES FINANCIAL COMPANIES LLLP | 815917 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 41502 | 840411 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| LOS ANGELES CAPITAL MANAGEMENT LLC | 1177206 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 893 | 18458 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6711987 | 138736771 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| FOX RUN MANAGEMENT, L.L.C. | 1533457 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 56706 | 1172113 | — | — | — | Aug 4, 2026 | SEC_13F_DATASET |
| Curated Wealth Partners LLC | 1781284 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 120000 | 132734 | — | — | — | Jul 13, 2026 | SEC_13F_DATASET |
| Aberdeen Wealth Management LLC | 1802654 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 106 | 2191 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Park Place Capital Corp | 1965810 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2 | 41 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| WEDGE CAPITAL MANAGEMENT L L P/NC | 1015308 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 187832 | 3882487 | — | — | — | Jul 10, 2026 | SEC_13F_DATASET |
| Peak Asset Management, LLC | 1632512 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 24000 | 496080 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Cetera Investment Advisers | 1666741 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12885 | 266333 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| PICTON MAHONEY ASSET MANAGEMENT | 1539041 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 240 | 4961 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| SIT INVESTMENT ASSOCIATES INC | 769317 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 26202 | 542 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| BlackRock, Inc. | 2012383 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12602748 | 260498801 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| Perkins Coie Trust Co | 1513038 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 219 | 4524 | — | — | — | Jul 9, 2026 | SEC_13F_DATASET |
| NORGES BANK | 1374170 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1516193 | 31339709 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Pine Valley Investments Ltd Liability Co | 1975417 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 89488 | 1849717 | — | — | — | Jul 24, 2026 | SEC_13F_DATASET |
| Vanguard Investments Australia, Ltd. | 1550100 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 39488 | 816217 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 1446179 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 394370 | 8151628 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| 683 Capital Management, LLC | 1404574 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1100000 | 22737000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Bryn Mawr Trust Advisors, LLC | 1700481 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 141443 | 2923627 | — | — | — | Aug 3, 2026 | SEC_13F_DATASET |
| Pathstone Holdings, LLC | 2011612 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 23944 | 494927 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| ROYCE & ASSOCIATES LP | 906304 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 697368 | 14414597 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC | 922127 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 19129 | 395396 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Hikari Tsushin, Inc. | 1423673 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 45403 | 938480 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Ankerstar Wealth, LLC | 2053917 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 19 | 393 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Verbena Value LP | 2082932 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 186200 | 3848754 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| MERCER GLOBAL ADVISORS INC /ADV | 853758 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12994 | 268594 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU SA | 2071170 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1033 | 21352 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| NATIXIS | 1274981 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 67073 | 1386399 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| AMERIPRISE FINANCIAL INC | 820027 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 305407 | 6312762 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SHUFRO ROSE & CO LLC | 908195 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10734 | 221872 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Sanctuary Advisors, LLC | 1777271 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15732 | 325180 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Invesco Ltd. | 914208 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10852862 | 224328658 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| DIMENSIONAL FUND ADVISORS LP | 354204 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5230654 | 108117618 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Ancora Advisors LLC | 1446114 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 715629 | 14792051 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| PRIMECAP MANAGEMENT CO/CA/ | 763212 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 12285504 | 253941367 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| CENTRAL TRUST Co | 44365 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 96 | 1985 | — | — | — | Jul 31, 2026 | SEC_13F_DATASET |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 7948385 | 164293118 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Summit Trail Advisors, LLC | 1698478 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20229 | 418133 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Grantham, Mayo, Van Otterloo & Co. LLC | 1352662 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 21601 | 446493 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Old West Investment Management, LLC | 1549358 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 32875 | 679526 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| NEVILLE RODIE & SHAW INC | 71210 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 21486 | 444 | — | — | — | Jul 6, 2026 | SEC_13F_DATASET |
| AdvisorNet Financial, Inc | 1409362 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 243 | 5023 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| Lebenthal Global Advisors, LLC | 1845766 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 32954 | 681159 | — | — | — | Jul 30, 2026 | SEC_13F_DATASET |
| Swiss National Bank | 1582202 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 318091 | 6574941 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| D. E. Shaw & Co., Inc. | 1009207 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 107743 | 2227048 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| LOUISBOURG INVESTMENTS INC. | 2053050 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5 | 103 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| Axiom Investment Management LLC | 1513703 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 530 | 10955 | — | — | — | Jul 31, 2026 | SEC_13F_DATASET |
| Larson Financial Group LLC | 1731061 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 333 | 6883 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SEGRA CAPITAL MANAGEMENT, LLC | 1607512 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2037890 | 42123186 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| THOMPSON SIEGEL & WALMSLEY LLC | 1008322 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2281945 | 47168 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| EXCHANGE TRADED CONCEPTS, LLC | 1457320 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 300879 | 6219169 | — | — | — | Jul 22, 2026 | SEC_13F_DATASET |
| SJS Investment Consulting Inc. | 1894302 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1 | 21 | — | — | — | Jul 22, 2026 | SEC_13F_DATASET |
| Quantinno Capital Management LP | 1759654 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 99067 | 2047726 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Bank of New York Mellon Corp | 1390777 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 524173 | 10834656 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| STRS OHIO | 820478 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 6195 | 128051 | — | — | — | Jul 30, 2026 | SEC_13F_DATASET |
| MORGAN STANLEY | 895421 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 65639 | 1356758 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| CX Institutional | 1737089 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 7694 | 159 | — | — | — | Jul 2, 2026 | SEC_13F_DATASET |
| XPONANCE LLC | 1637541 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10908 | 225468 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| AQR CAPITAL MANAGEMENT LLC | 1167557 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 596816 | 12318290 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Ruane, Cunniff & Goldfarb L.P. | 1720792 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 537213 | 11104193 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Russell Investments Group, Ltd. | 1692234 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 642644 | 13283451 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| Farther Finance Advisors, LLC | 1992825 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2521 | 52094 | — | — | — | Jul 17, 2026 | SEC_13F_DATASET |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 1081019 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3787219 | 183223 | — | — | — | Aug 24, 2026 | SEC_13F_DATASET |
| Formidable Asset Management, LLC | 1592613 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 13065 | 270054 | — | — | — | Jul 17, 2026 | SEC_13F_DATASET |
| RHUMBLINE ADVISERS | 1115418 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 284060 | 5871488 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| BOK Financial Private Wealth, Inc. | 1317348 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 5268 | 108890 | — | — | — | Aug 10, 2026 | SEC_13F_DATASET |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 1368163 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 40963 | 846705 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
Informational research only, not financial advice. Forecasts are uncertain and can be wrong.