Amentum Holdings
AMTM
462 hedge funds and large institutions have $4.63B invested in Amentum Holdings in 2025 Q3 according to their latest regulatory filings, with 76 funds opening new positions, 104 increasing their positions, 179 reducing their positions, and 69 closing their positions.
49% more call options, than puts
Call options by funds: $22.9M | Put options by funds: $15.4M
10% more first-time investments, than exits
New positions opened: 76 | Existing positions closed: 69
0% more funds holding
Funds holding: 460 → 462 (+2)
0% more funds holding in top 10
Funds holding in top 10: 9 → 9 (0)
2% less capital invested
Capital invested by funds: $4.73B → $4.63B (-$98.4M)
2.85% less ownership
Funds ownership: 82.34% → 79.49% (-2.8%)
42% less repeat investments, than reductions
Existing positions increased: 104 | Existing positions reduced: 179
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Invesco
Atlanta,
Georgia
|
+$61.8M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
+$40.4M |
| 3 |
Verition Fund Management
Greenwich,
Connecticut
|
+$25.4M |
| 4 |
Point72 Asset Management
Stamford,
Connecticut
|
+$25.1M |
| 5 |
Mirae Asset Global ETFs Holdings
Causeway Bay,
Hong Kong
|
+$17.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$98M |
| 2 |
VanEck Associates
New York
|
-$56.1M |
| 3 |
DCM
Discovery Capital Management
South Norwalk,
Connecticut
|
-$28.2M |
| 4 |
BlackRock
New York
|
-$24.5M |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
-$23.8M |
AMTM Hedge Fund Activity: Q3 2025 in Review
462 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Amentum Holdings (AMTM) for Q3 2025, worth a combined $4.63B — down 2.1% from $4.73B a quarter earlier.
Buyers outnumbered sellers: 76 funds opened new AMTM positions and 69 closed out — a net gain of 7 holders — while 104 added to existing stakes and 179 trimmed.
The largest buyer was Invesco, adding an estimated $61.8M. The largest seller was Millennium Management, cutting an estimated $98M.
- 462 institutional investors held Amentum Holdings (AMTM) as of Q3 2025, up from 460 in Q2 2025.
- Funds reported $4.63B of Amentum Holdings stock for Q3 2025, down 2.1% quarter-over-quarter.
- 76 funds opened new Amentum Holdings positions in Q3 2025 and 69 closed out, a net change of +7 holders.
- The largest Amentum Holdings buyer in Q3 2025 was Invesco, an estimated $61.8M added.
- The largest Amentum Holdings seller in Q3 2025 was Millennium Management, an estimated $98M sold.
Based on aggregated 13F filings for Q3 2025.