Insmed (INSM) — insider trading
Health Care · NASDAQ
Insmed (INSM) has 98 reported SEC Form 4 insider transactions in our data, including 48 open-market sales among the most recent 98 (latest 2026-10-19).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-19 | Koppikar Utpal | Director | Grant / award / vesting | 6,139 | — | — | Form 4 |
| 2026-10-19 | Hudson Paul | Director | Grant / award / vesting | 6,139 | — | — | Form 4 |
| 2026-09-09 | Brennan David R | Director | Open-market sale | 25,000 | $124.00 | $3.10M | Form 4 |
| 2026-08-17 | SHAROKY MELVIN MD | Director | Open-market sale | 5,000 | $127.53 | $637.6K | Form 4 |
| 2026-08-10 | Adsett Roger | Officer (Chief Operating Officer) | Option exercise / conversion (derivative) | 80,970 | — | $0 | Form 4 |
| 2026-08-10 | Adsett Roger | Officer (Chief Operating Officer) | Option exercise / conversion (derivative) | 76,600 | — | $0 | Form 4 |
| 2026-08-10 | Adsett Roger | Officer (Chief Operating Officer) | Option exercise / conversion (derivative) | 82,280 | — | $0 | Form 4 |
| 2026-08-10 | Adsett Roger | Officer (Chief Operating Officer) | Open-market sale | 239,850 | $133.27 | $31.96M | Form 4 |
| 2026-08-10 | Adsett Roger | Officer (Chief Operating Officer) | Option exercise / conversion | 80,970 | $30.46 | $2.47M | Form 4 |
| 2026-08-10 | Adsett Roger | Officer (Chief Operating Officer) | Option exercise / conversion | 76,600 | $17.16 | $1.31M | Form 4 |
| 2026-08-10 | Adsett Roger | Officer (Chief Operating Officer) | Option exercise / conversion | 82,280 | $13.67 | $1.12M | Form 4 |
| 2026-08-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion (derivative) | 8,895 | — | $0 | Form 4 |
| 2026-08-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion (derivative) | 18,278 | — | $0 | Form 4 |
| 2026-08-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 18,278 | $129.40 | $2.37M | Form 4 |
| 2026-08-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 8,895 | $127.00 | $1.13M | Form 4 |
| 2026-08-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion | 8,895 | $25.83 | $229.8K | Form 4 |
| 2026-08-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion | 18,278 | $18.95 | $346.4K | Form 4 |
| 2026-07-23 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 4,440 | — | $0 | Form 4 |
| 2026-07-23 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 6,260 | — | $0 | Form 4 |
| 2026-07-23 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 5,872 | $106.43 | $625.0K | Form 4 |
| 2026-07-23 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 4,828 | $105.62 | $509.9K | Form 4 |
| 2026-07-23 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 4,440 | $17.16 | $76.2K | Form 4 |
| 2026-07-23 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 6,260 | $30.46 | $190.7K | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 4,440 | — | $0 | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 6,259 | — | $0 | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 3,359 | $118.52 | $398.1K | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 2,335 | $117.62 | $274.6K | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 5,005 | $116.55 | $583.3K | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 4,440 | $17.16 | $76.2K | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 6,259 | $30.46 | $190.6K | Form 4 |
| 2026-07-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion (derivative) | 4,357 | — | $0 | Form 4 |
| 2026-07-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion (derivative) | 7,945 | — | $0 | Form 4 |
| 2026-07-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 7,448 | $110.60 | $823.7K | Form 4 |
| 2026-07-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 4,854 | $109.02 | $529.2K | Form 4 |
| 2026-07-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion | 4,357 | $19.74 | $86.0K | Form 4 |
| 2026-07-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion | 7,945 | $29.13 | $231.4K | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 8,880 | — | $0 | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 12,518 | — | $0 | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 1,292 | $106.27 | $137.3K | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 2,456 | $105.27 | $258.5K | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 3,723 | $104.28 | $388.2K | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 1,836 | $103.10 | $189.3K | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 12,091 | $102.34 | $1.24M | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 8,880 | $17.16 | $152.4K | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 12,518 | $30.46 | $381.3K | Form 4 |
| 2026-06-23 | Butera Samuele | Officer (SVP, GM, Global Respiratory) | Grant / award / vesting (derivative) | 12,570 | — | $0 | Form 4 |
| 2026-06-23 | Butera Samuele | Officer (SVP, GM, Global Respiratory) | Grant / award / vesting | 7,342 | — | — | Form 4 |
| 2026-06-22 | Smith Michael Alexander | Officer (Chief Legal Officer) | Open-market sale | 1,806 | $95.82 | $173.1K | Form 4 |
| 2026-06-08 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 6,515 | $94.03 | $612.6K | Form 4 |
| 2026-06-05 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 1,858 | $103.78 | $192.8K | Form 4 |
| 2026-06-03 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 2,566 | $102.27 | $262.4K | Form 4 |
| 2026-06-03 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 7,605 | $102.27 | $777.8K | Form 4 |
| 2026-06-03 | Smith Michael Alexander | Officer (Chief Legal Officer) | Open-market sale | 2,159 | $102.27 | $220.8K | Form 4 |
| 2026-06-03 | Bonstein Sara | Officer (Chief Financial Officer) | Open-market sale | 2,404 | $102.27 | $245.9K | Form 4 |
| 2026-06-03 | Adsett Roger | Officer (Chief Operating Officer) | Open-market sale | 2,370 | $102.27 | $242.4K | Form 4 |
| 2026-05-22 | Smith Michael Alexander | Officer (Chief Legal Officer) | Open-market sale | 6,149 | $108.47 | $667.0K | Form 4 |
| 2026-05-18 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 4,440 | — | $0 | Form 4 |
| 2026-05-18 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 6,259 | — | $0 | Form 4 |
| 2026-05-18 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 7,975 | $106.97 | $853.1K | Form 4 |
| 2026-05-18 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 11,836 | $106.39 | $1.26M | Form 4 |
| 2026-05-18 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 5,753 | $105.32 | $605.9K | Form 4 |
| 2026-05-18 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 4,440 | $17.16 | $76.2K | Form 4 |
| 2026-05-18 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 6,259 | $30.46 | $190.6K | Form 4 |
| 2026-05-14 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 10,479 | $117.54 | $1.23M | Form 4 |
| 2026-05-13 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 13,283 | $116.18 | $1.54M | Form 4 |
| 2026-05-13 | LEE LEO | Director | Grant / award / vesting | 3,305 | — | — | Form 4 |
| 2026-05-13 | Desjardins Clarissa | Director | Grant / award / vesting | 3,305 | — | — | Form 4 |
| 2026-05-13 | Brennan David R | Director | Grant / award / vesting | 3,305 | — | — | Form 4 |
| 2026-05-13 | SHAROKY MELVIN MD | Director | Grant / award / vesting | 3,305 | — | — | Form 4 |
| 2026-05-13 | Smith Michael Alexander | Officer (Chief Legal Officer) | Open-market sale | 4,109 | $116.18 | $477.4K | Form 4 |
| 2026-05-13 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 3,384 | $116.18 | $393.2K | Form 4 |
| 2026-05-13 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 4,470 | $112.76 | $504.0K | Form 4 |
| 2026-05-13 | ANDERSON ELIZABETH M | Director | Grant / award / vesting | 3,305 | — | — | Form 4 |
| 2026-05-13 | Adsett Roger | Officer (Chief Operating Officer) | Open-market sale | 5,837 | $116.18 | $678.1K | Form 4 |
| 2026-05-13 | SCHAFER CAROL | Director | Grant / award / vesting | 3,305 | — | — | Form 4 |
| 2026-05-13 | Bonstein Sara | Officer (Chief Financial Officer) | Open-market sale | 8,272 | $116.18 | $961.0K | Form 4 |
| 2026-05-11 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion (derivative) | 12,949 | — | $0 | Form 4 |
| 2026-05-11 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 830 | $101.18 | $84.0K | Form 4 |
| 2026-05-11 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Open-market sale | 12,119 | $100.35 | $1.22M | Form 4 |
| 2026-05-11 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion | 12,949 | $17.07 | $221.0K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 4,440 | — | $0 | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 6,259 | — | $0 | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 381 | $139.60 | $53.2K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 1,247 | $139.09 | $173.4K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 2,721 | $137.86 | $375.1K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 5,318 | $137.01 | $728.6K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 599 | $135.18 | $81.0K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 433 | $134.18 | $58.1K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 4,440 | $17.16 | $76.2K | Form 4 |
| 2026-05-04 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 6,259 | $30.46 | $190.6K | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 4,440 | — | $0 | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 6,259 | — | $0 | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 825 | $145.79 | $120.3K | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 2,255 | $144.66 | $326.2K | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 5,373 | $143.81 | $772.7K | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Open-market sale | 2,246 | $142.99 | $321.2K | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 4,440 | $17.16 | $76.2K | Form 4 |
| 2026-04-16 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion | 6,259 | $30.46 | $190.6K | Form 4 |
Ask the chat about INSM's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: Insmed (INSM).
Last updated 2026-10-19 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.