Amentum Holdings, Inc. (AMTM) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for AMTM. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 451 institutions reported holding AMTM, with 218.7 million shares worth $4.3 billion in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| American Securities | 45,026,743 | $931M | UNCHANGED |
| Invesco Ltd | 24,954,251 | $516M | INCREASED |
| BlackRock | 17,906,984 | $370M | INCREASED |
| Vanguard | 15,950,609 | $330M | INCREASED |
| Primecap Management Co | 12,285,504 | $254M | INCREASED |
Full institutional holdings, insider history, and congressional trades for Amentum Holdings, Inc. on SentiSense.