Amarin Corp
AMRN
91 hedge funds and large institutions have $65.8M invested in Amarin Corp in 2025 Q3 according to their latest regulatory filings, with 11 funds opening new positions, 29 increasing their positions, 15 reducing their positions, and 9 closing their positions.
93% more repeat investments, than reductions
Existing positions increased: 29 | Existing positions reduced: 15
43% more call options, than puts
Call options by funds: $4.4M | Put options by funds: $3.08M
22% more first-time investments, than exits
New positions opened: 11 | Existing positions closed: 9
15% more capital invested
Capital invested by funds: $57M → $65.8M (+$8.82M)
2.36% more ownership
Funds ownership: 17% → 19.36% (+2.4%)
2% more funds holding
Funds holding: 89 → 91 (+2)
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Acadian Asset Management
Boston,
Massachusetts
|
+$3.35M |
| 2 |
Morgan Stanley
New York
|
+$1.66M |
| 3 |
Millennium Management
New York
|
+$1.35M |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$1.19M |
| 5 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$580K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GKFF
George Kaiser Family Foundation
Tulsa,
Oklahoma
|
-$620K |
| 2 |
TI
Trexquant Investment
Stamford,
Connecticut
|
-$530K |
| 3 |
HKIM
Hayek Kallen Investment Management
Fairhope,
Alabama
|
-$394K |
| 4 |
Mercer Global Advisors
Denver,
Colorado
|
-$388K |
| 5 |
SI
SCP Investment
Orinda,
California
|
-$388K |
AMRN Hedge Fund Activity: Q3 2025 in Review
91 of the 7,641 institutional investors tracked by Wall St. Rank reported a position in Amarin Corp (AMRN) for Q3 2025, worth a combined $65.8M — up 15% from $57M a quarter earlier.
Buyers outnumbered sellers: 11 funds opened new AMRN positions and 9 closed out — a net gain of 2 holders — while 29 added to existing stakes and 15 trimmed.
The largest buyer was Acadian Asset Management, adding an estimated $3.35M. The largest seller was George Kaiser Family Foundation, exiting entirely with an estimated $620K sold.
- 91 institutional investors held Amarin Corp (AMRN) as of Q3 2025, up from 89 in Q2 2025.
- Funds reported $65.8M of Amarin Corp stock for Q3 2025, up 15% quarter-over-quarter.
- 11 funds opened new Amarin Corp positions in Q3 2025 and 9 closed out, a net change of +2 holders.
- The largest Amarin Corp buyer in Q3 2025 was Acadian Asset Management, an estimated $3.35M added.
- The largest Amarin Corp seller in Q3 2025 was George Kaiser Family Foundation, an estimated $620K sold.
Based on aggregated 13F filings for Q3 2025.