Amentum Holdings, Inc. Common Stock is a security (CUSIP 023939101) tracked across SEC portfolio filings. 497 institutional managers reported $4.7B on Form 13F as of 2026-06-30; 31 registered fund positions totaling $360.6M via N-PORT as of 2026-05-31.
Showing 15 of 497 managers by value.
| Manager | Location | Value | Shares |
|---|---|---|---|
| AMERICAN SECURITIES LLC | NEW YORK, NY | $1.2B | 45,026,743 |
| BlackRock, Inc. | New York, NY | $465.3M | 17,841,283 |
| VANGUARD GROUP INC | Valley Forge, PA | $446.9M | 15,411,745 |
| PRIMECAP MANAGEMENT CO/CA/ | PASADENA, CA | $315.2M | 12,085,294 |
| FMR LLC | BOSTON, MA | $145.5M | 5,578,386 |
| STATE STREET CORP | BOSTON, MA | $132.5M | 5,079,041 |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Boston, MA | $128.6M | 4,930,210 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $98.8M | 3,787,420 |
| Arvin Capital Management LP | AUSTIN, TX | $73.5M | 2,071,200 |
| GEODE CAPITAL MANAGEMENT, LLC | BOSTON, MA | $73.4M | 2,814,415 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | CENTRAL, K3 | $72.6M | 2,785,134 |
| Focus Partners Wealth | ST LOUIS, MO | $67.9M | 2,604,911 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $62.7M | 2,405,041 |
| MORGAN STANLEY | NEW YORK, NY | $58.3M | 2,234,913 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | SAN FRANCISCO, CA | $53.9M | 2,067,930 |
Showing 15 of 31 fund positions by value.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| VANGUARD PRIMECAP CORE FUND | VANGUARD FENWAY FUNDS | $137.4M | 101.47% |
| Invesco Small Cap Value Fund | AIM Sector Funds (Invesco Sector Funds) | $110.9M | 103.10% |
| VANGUARD EXTENDED MARKET INDEX FUND | VANGUARD INDEX FUNDS | $44.7M | 5.49% |
| Sequoia Fund Inc | Sequoia Fund Inc | $20.0M | 60.09% |
| PRIMECAP Odyssey Growth Fund | PRIMECAP Odyssey Funds | $15.3M | 28.18% |
| Ancora/Thelen Small-Mid Cap Fund | ANCORA TRUST | $12.0M | 564.00% |
| Large Cap Index Master Portfolio | Master Investment Portfolio | $2.3M | 0.64% |
| Nuveen Small/Mid Cap Value Fund | Nuveen Investment Trust | $2.3M | 205.77% |
| VANGUARD BALANCED INDEX FUND | VANGUARD VALLEY FORGE FUNDS | $2.1M | 0.36% |
| BNY Mellon Smallcap Stock Index Fund | BNY MELLON INDEX FUNDS, INC. | $2.0M | 23.71% |
| VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND | VANGUARD INSTITUTIONAL INDEX FUNDS | $1.8M | 0.61% |
| NORTH SQUARE SMALL CAP VALUE FUND | Valued Advisers Trust | $1.6M | 76.81% |
| Gabelli Equity Trust Inc | Gabelli Equity Trust Inc | $1.5M | 8.58% |
| AMG Frontier Small Cap Growth Fund | AMG Funds I | $1.3M | 136.57% |
| The Gabelli Asset Fund | Gabelli Asset Fund | $1.3M | 8.31% |