Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.
INSM
INSMED INCData as of 2026 Q1 (03-31) · 13F snapshot
Summary
INSMED INC (INSM) is held by 9 tracked hedge-fund managers, a combined reported value of ~$1.06B; the largest are Ken Griffin, Izzy Englander, Stanley Druckenmiller. This quarter: 1 new, 1 added, 4 trimmed. 9 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Cooling
Gurus holding9
Congress trades9
Price$97.85vs quarter-end-40.16%
Sectors0
This quarter's moves
Top holderKen GriffinNew1
Added1
Trimmed / sold4
Value $188.72M6.4% of portfolio1,154,0902026 Q1
Value $62.09M— of portfolio379,7002026 Q1
George SorosTrim
Value $23.44M0.6% of portfolio307,2112025 Q1
Value $22.45M— of portfolio137,3002026 Q1
Value $10.06M— of portfolio100,0002025 Q2
Value $8.31M— of portfolio50,8002026 Q1
Value $4.10M— of portfolio25,1002026 Q1
Value $2.21M— of portfolio13,5002026 Q1
Value $208.8K— of portfolio1,2002025 Q4
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Stanley Druckenmiller | $188.72M | 6.4% | Trim |
| Ken GriffinCALL | $62.09M | — | — |
| George Soros | $23.44M | 0.6% | Trim |
| Izzy EnglanderCALL | $22.45M | — | — |
| Stanley DruckenmillerCALL | $10.06M | — | — |
| Ken GriffinPUT | $8.31M | — | — |
| Steven CohenPUT | $4.10M | — | — |
| Steven CohenCALL | $2.21M | — | — |
| Izzy EnglanderPUT | $208.8K | — | — |