Insmed
INSM
516 hedge funds and large institutions have $21.2B invested in Insmed in 2025 Q2 according to their latest regulatory filings, with 131 funds opening new positions, 165 increasing their positions, 189 reducing their positions, and 52 closing their positions.
152% more first-time investments, than exits
New positions opened: 131 | Existing positions closed: 52
38% more capital invested
Capital invested by funds: $15.3B → $21.2B (+$5.85B)
17% more funds holding
Funds holding: 441 → 516 (+75)
6% more funds holding in top 10
Funds holding in top 10: 31 → 33 (+2)
5.23% more ownership
Funds ownership: 110.29% → 115.51% (+5.2%)
13% less repeat investments, than reductions
Existing positions increased: 165 | Existing positions reduced: 189
16% less call options, than puts
Call options by funds: $300M | Put options by funds: $356M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
JP Morgan Chase
New York
|
+$710M |
| 2 |
DGM
Darwin Global Management
St. Helier,
Jersey
|
+$302M |
| 3 |
D.E. Shaw & Co
New York
|
+$206M |
| 4 |
BBA
Baker Bros. Advisors
New York
|
+$178M |
| 5 |
Fidelity Investments
Boston,
Massachusetts
|
+$130M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$375M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$129M |
| 3 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$113M |
| 4 |
State Street
Boston,
Massachusetts
|
-$112M |
| 5 |
SCM
Suvretta Capital Management
New York
|
-$95.9M |
INSM Hedge Fund Activity: Q2 2025 in Review
516 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in Insmed (INSM) for Q2 2025, worth a combined $21.2B — up 38% from $15.3B a quarter earlier.
Buyers outnumbered sellers: 131 funds opened new INSM positions and 52 closed out — a net gain of 79 holders — while 165 added to existing stakes and 189 trimmed.
The largest buyer was JP Morgan Chase, adding an estimated $710M. The largest seller was BlackRock, cutting an estimated $375M.
- 516 institutional investors held Insmed (INSM) as of Q2 2025, up from 441 in Q1 2025.
- Funds reported $21.2B of Insmed stock for Q2 2025, up 38% quarter-over-quarter.
- 131 funds opened new Insmed positions in Q2 2025 and 52 closed out, a net change of +79 holders.
- The largest Insmed buyer in Q2 2025 was JP Morgan Chase, an estimated $710M added.
- The largest Insmed seller in Q2 2025 was BlackRock, an estimated $375M sold.
Based on aggregated 13F filings for Q2 2025.