Amentum Holdings
AMTM
419 hedge funds and large institutions have $3.49B invested in Amentum Holdings in 2025 Q1 according to their latest regulatory filings, with 73 funds opening new positions, 112 increasing their positions, 152 reducing their positions, and 95 closing their positions.
49% more call options, than puts
Call options by funds: $62.3M | Put options by funds: $41.7M
10.85% more ownership
Funds ownership: 67.95% → 78.8% (+11%)
0% more capital invested
Capital invested by funds: $3.48B → $3.49B (+$9.45M)
0% more funds holding in top 10
Funds holding in top 10: 5 → 5 (0)
7% less funds holding
Funds holding: 451 → 419 (-32)
23% less first-time investments, than exits
New positions opened: 73 | Existing positions closed: 95
26% less repeat investments, than reductions
Existing positions increased: 112 | Existing positions reduced: 152
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Primecap Management
Pasadena,
California
|
+$74.3M |
| 2 |
FCM
Frontier Capital Management
Boston,
Massachusetts
|
+$72.9M |
| 3 |
Invesco
Atlanta,
Georgia
|
+$67.9M |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$51.6M |
| 5 |
DCM
Discovery Capital Management
South Norwalk,
Connecticut
|
+$44.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CCPM
Cooper Creek Partners Management
New York
|
-$59.7M |
| 2 |
Allspring Global Investments
Charlotte,
North Carolina
|
-$52.4M |
| 3 |
Wellington Management Group
Boston,
Massachusetts
|
-$49.1M |
| 4 |
Mirae Asset Global ETFs Holdings
Causeway Bay,
Hong Kong
|
-$18.3M |
| 5 |
CP
Castalian Partners
Excelsior,
Minnesota
|
-$14.2M |
AMTM Hedge Fund Activity: Q1 2025 in Review
419 of the 7,471 institutional investors tracked by Wall St. Rank reported a position in Amentum Holdings (AMTM) for Q1 2025, worth a combined $3.49B — up 0.27% from $3.48B a quarter earlier.
Sellers outnumbered buyers: 95 funds closed out of AMTM and 73 opened new positions — a net loss of 22 holders — while 152 trimmed existing stakes and 112 added.
The largest buyer was Primecap Management, adding an estimated $74.3M. The largest seller was Cooper Creek Partners Management, cutting an estimated $59.7M.
- 419 institutional investors held Amentum Holdings (AMTM) as of Q1 2025, down from 451 in Q4 2024.
- Funds reported $3.49B of Amentum Holdings stock for Q1 2025, up 0.27% quarter-over-quarter.
- 73 funds opened new Amentum Holdings positions in Q1 2025 and 95 closed out, a net change of -22 holders.
- The largest Amentum Holdings buyer in Q1 2025 was Primecap Management, an estimated $74.3M added.
- The largest Amentum Holdings seller in Q1 2025 was Cooper Creek Partners Management, an estimated $59.7M sold.
Based on aggregated 13F filings for Q1 2025.