Amentum Holdings, Inc. (NYSE:AMTM) has 478 institutional investors with active 13F positions as of March 2026.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| AMERICAN SECURITIES LLC | 31 Mar, 2026 | 45,026,743 | 0 | 0.00% | $1,174,297,457.00 |
| Invesco Ltd. | 31 Mar, 2026 | 21,473,778 | -360,225 | -1.65% | $560,036,140.00 |
| BlackRock, Inc. | 31 Mar, 2026 | 17,841,283 | 382,184 | 2.19% | $465,300,661.00 |
| PRIMECAP MANAGEMENT CO/CA/ | 31 Mar, 2026 | 12,085,294 | -41,633 | -0.34% | $315,184,494.00 |
| Legacy Advisors, LLC | 31 Mar, 2026 | 9,064,278 | -750,011 | -7.64% | $9,064,278.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Mar, 2026 | 7,852,951 | 7,852,951 | 0.00% | $204,804,962.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 6,650,879 | 6,650,879 | 0.00% | $173,454,924.00 |
| FMR LLC | 31 Mar, 2026 | 5,578,386 | -1,128,918 | -16.83% | $145,484,322.00 |
| State Street Corp | 31 Mar, 2026 | 5,079,041 | 17,421 | 0.34% | $132,461,389.00 |
| FRONTIER CAPITAL MANAGEMENT CO LLC | 31 Mar, 2026 | 4,930,210 | -842,766 | -14.60% | $128,579,888.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Mar, 2026 | 3,787,420 | 1,954,494 | 106.63% | $98,767,206.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Mar, 2026 | 2,814,415 | 155,051 | 5.83% | $73,424,524.00 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 31 Mar, 2026 | 2,785,134 | 823,207 | 41.96% | $72,636,295.00 |
| Focus Partners Wealth | 31 Mar, 2026 | 2,604,911 | -189,506 | -6.78% | $67,936,092.00 |
| Bank Of America Corp /De/ | 31 Mar, 2026 | 2,405,041 | 1,247,614 | 107.79% | $62,723,470.00 |
| Morgan Stanley | 31 Mar, 2026 | 2,234,913 | 159,561 | 7.69% | $58,286,592.00 |
| THRIVENT FINANCIAL FOR LUTHERANS | 31 Mar, 2026 | 2,100,457 | 31,353 | 1.52% | $54,780.00 |
| Arvin Capital Management LP | 31 Mar, 2026 | 2,071,200 | 434,708 | 26.56% | $54,016,896.00 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 31 Mar, 2026 | 2,067,930 | 115,928 | 5.94% | $53,931,614.00 |
| UBS Group AG | 31 Mar, 2026 | 1,710,775 | 1,504,673 | 730.06% | $44,617,011.00 |