Who owns INSM
649 institutions reported holding INSM for 2026Q1, together 100% of the company, fewer than the 659 a quarter earlier.
649
Institutions reporting a position · as of 2026Q1 · down from 659 the quarter before
- Shares held by institutions
- 215.8M
Shares held by institutions · 100% of the company · long US equity positions only, as reported on Form 13F
- Reported value
- $34.9B
Reported value · at 2026-03-31 prices, not today's
- Top 5 holders
- 43%
Top 5 holders · of the whole company, between five filers
Details›
- Reporting quarter2026-03-31
- 2026Q1
- Quarters on record
- 52
- New positions
- 89
- Positions exited
- 104
- Added to
- 263
- Reduced
- 195
- Top 10 holdersof the company
- 57%
| Quarter | Filers | Shares | Reported value |
|---|---|---|---|
| 2026Q1 | 649 | 215.8M | $34.9B |
| 2025Q4 | 659 | 211.9M | $36.9B |
| 2025Q3 | 556 | 210.2M | $30.2B |
| 2025Q2 | 507 | 209.9M | $21.1B |
| 2025Q1 | 436 | 199.5M | $15.3B |
| 2024Q4 | 433 | 192.4M | $13.3B |
| 2024Q3 | 409 | 187.6M | $13.7B |
| 2024Q2 | 374 | 175.0M | $11.7B |
| 2024Q1 | 286 | 148.5M | $4.03B |
| 2023Q4 | 269 | 149.6M | $4.64B |
| 2023Q3 | 248 | 147.2M | $3.72B |
| 2023Q2 | 221 | 146.4M | $3.09B |
| 2023Q1 | 227 | 145.4M | $2.48B |
| 2022Q4 | 223 | 143.3M | $2.86B |
| 2022Q3 | 235 | 127.1M | $2.74B |
| 2022Q2 | 211 | 129.2M | $2.55B |
| Holder | Shares | % of company | Value |
|---|---|---|---|
| JPMORGAN CHASE & CO | 24.2M | 11% | $3.70B |
| VANGUARD GROUP INC | 22.0M | 10% | $3.59B |
| Darwin Global Management, Ltd. | 16.8M | 7.8% | $2.58B |
| BlackRock Inc. | 16.7M | 7.7% | $2.73B |
| FMR LLC | 13.2M | 6.1% | $2.15B |
| BAKER BROS. ADVISORS LP | 7.4M | 3.4% | $1.21B |
| Artisan Partners Limited Partnership | 6.5M | 3.0% | $1.07B |
| D. E. Shaw & Co., INC. | 5.6M | 2.6% | $920M |
| Capital International Investors | 5.6M | 2.6% | $915M |
| STATE STREET CORP | 5.6M | 2.6% | $908M |
SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.
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