Amentum Holdings, Inc.
AMTM- Exchange
- NYSE
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0002011286
No open-market purchases or sales by Amentum Holdings, Inc. insiders were filed in the last 90 days; 464 institutions reported holding it in 13F filings for Q2 2026, worth $4.34B in total; Soros Fund Management is the only superinvestor holding it.
Superinvestors holding AMTM, Q2 2026
1 superinvestor reports holding Amentum Holdings, Inc. on Form 13F, worth $2.44M in total. Weight is Amentum Holdings, Inc.'s share of each 13F portfolio; actions compare shares with Q1 2026.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| Soros Fund ManagementGeorge Soros | <0.1% | 118,276 | $2.44M | Added+9.9% |
Moves by quarter
Superinvestors that opened, added to, trimmed or sold out of AMTM each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.
Q2 2026
1 superinvestor holding at quarter end
- Added
- Soros Fund Management (+9.9%)
- Sold out
- Maverick Capital
Q1 2026
2 superinvestors holding at quarter end
- New
- Maverick Capital
- Reduced
- Soros Fund Management (−1.6%)
Q4 2025
1 superinvestor holding at quarter end
Q4 2024
0 superinvestors holding at quarter end
- Sold out
- Soros Fund Management
Q3 2024
1 superinvestor holding at quarter end