Alkermes
ALKS
361 hedge funds and large institutions have $5.14B invested in Alkermes in 2025 Q3 according to their latest regulatory filings, with 46 funds opening new positions, 148 increasing their positions, 134 reducing their positions, and 36 closing their positions.
105% more call options, than puts
Call options by funds: $27M | Put options by funds: $13.2M
28% more first-time investments, than exits
New positions opened: 46 | Existing positions closed: 36
16% more capital inflows, than outflows
Capital inflows: $466M | Capital outflows: $402M
10% more repeat investments, than reductions
Existing positions increased: 148 | Existing positions reduced: 134
2% more funds holding
Funds holding: 355 → 361 (+6)
1.25% more ownership
Funds ownership: 102.62% → 103.87% (+1.2%)
25% less funds holding in top 10
Funds holding in top 10: 4 → 3 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BBA
Baker Bros. Advisors
New York
|
+$47.4M |
| 2 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$31.2M |
| 3 |
Virginia Retirement Systems
Richmond,
Virginia
|
+$25.4M |
| 4 |
American Century Companies
Kansas City,
Missouri
|
+$20.9M |
| 5 |
Sio Capital Management
New York
|
+$19M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RTW Investments
New York
|
-$84.9M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$37.4M |
| 3 |
Bank of America
Charlotte,
North Carolina
|
-$29.8M |
| 4 |
JP Morgan Chase
New York
|
-$25.6M |
| 5 |
Farallon Capital Management
San Francisco,
California
|
-$18.9M |
ALKS Hedge Fund Activity: Q3 2025 in Review
361 of the 7,659 institutional investors tracked by Wall St. Rank reported a position in Alkermes (ALKS) for Q3 2025, worth a combined $5.14B — up 6.2% from $4.84B a quarter earlier.
Buyers outnumbered sellers: 46 funds opened new ALKS positions and 36 closed out — a net gain of 10 holders — while 148 added to existing stakes and 134 trimmed.
The largest buyer was Baker Bros. Advisors, adding an estimated $47.4M. The largest seller was RTW Investments, cutting an estimated $84.9M.
- 361 institutional investors held Alkermes (ALKS) as of Q3 2025, up from 355 in Q2 2025.
- Funds reported $5.14B of Alkermes stock for Q3 2025, up 6.2% quarter-over-quarter.
- 46 funds opened new Alkermes positions in Q3 2025 and 36 closed out, a net change of +10 holders.
- The largest Alkermes buyer in Q3 2025 was Baker Bros. Advisors, an estimated $47.4M added.
- The largest Alkermes seller in Q3 2025 was RTW Investments, an estimated $84.9M sold.
Based on aggregated 13F filings for Q3 2025.