Who owns Amentum Holdings, Inc. (AMTM)? Elite investor 13F holders
7 tracked elite investors reported holding Amentum Holdings, Inc as of 2026-06-30, including Ruane Cunniff LP, Ancora Advisors / Ancora Holdings, Gotham Asset Management, D.E. Shaw, GAMCO. Who bought, trimmed or exited each quarter, with links to the original SEC 13F filings.
7 tracked investors currently reported holding · Latest report period: 2026-06-30 · Industrials · Commercial & Professional Services
Amentum Holdings, Inc. engages in the provision of engineering and technology solutions in the United States and internationally. It operates through two segments, Digital Solutions and Global Engineering Solutions. The company offers digital and data-driven solutions, including intelligence analytics, space system development, cybersecurity, and IT to the federal government and commercial…
Reported holders and securities, including exits (up to 20)
| Investor | Security | Instrument | Report period | Filed | Value | Quantity | Units | Change | Source |
|---|---|---|---|---|---|---|---|---|---|
| Ruane Cunniff LP | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 11104193.00 USD | 537213.000000 | Shares | reduce | Original filing |
| Ancora Advisors / Ancora Holdings | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 14792526.00 USD | 715652.000000 | Shares | add | Original filing |
| Gotham Asset Management | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 3226856.00 USD | 156113.000000 | Shares | reduce | Original filing |
| D.E. Shaw | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 3958057.00 USD | 191488.000000 | Shares | add | Original filing |
| GAMCO | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-12 00:00:00 | 2007470.00 USD | 97120.000000 | Shares | add | Original filing |
| Maverick Capital | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 0.00 USD | 0.000000 | Shares | exited | Original filing |
| Bridgewater Associates | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-14 00:00:00 | 976099.00 USD | 47223.000000 | Shares | add | Original filing |
| GMO | AMENTUM HOLDINGS INC | SHARE | 2026-06-30 | 2026-08-13 00:00:00 | 446493.00 USD | 21601.000000 | Shares | buy | Original filing |
Public disclosures can be delayed, incomplete, or amended. Report period describes a position date; transaction date describes a reported transaction; filed describes submission. A recent filing or page update does not establish a current holding. A dash means unavailable or not comparable, not zero.
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