Insmed Incorporated (INSM) ownership: insiders 1% · institutions 101% (13F 2026-03-31). Insider activity, 90 days: Routine (24 sales, 0 open-market buys). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| JPMorgan | 24150499.00 | $3.70B | 11.1% | 2026-03-31 |
| Vanguard | 21954571.00 | $3.59B | 10.1% | 2026-03-31 |
| BlackRock | 16678146.00 | $2.73B | 7.6% | 2026-03-31 |
| Darwin Global Management, Ltd. | 16805184.00 | $2.58B | 7.7% | 2026-03-31 |
| FMR (Fidelity) | 13160167.00 | $2.15B | 6.0% | 2026-03-31 |
| Baker BROS. Advisors LP | 7421111.00 | $1.21B | 3.4% | 2026-03-31 |
| Capital Group | 6957485.00 | $1.14B | 3.2% | 2026-03-31 |
| Artisan Partners | 6527301.00 | $1.07B | 3.0% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-17 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.