Insmed (INSM) — insider trading
Health Care · NASDAQ
Insmed (INSM) has 32 reported SEC Form 4 insider transactions in our data, including 18 open-market sales among the most recent 32 (latest 2026-07-09).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 4,440 | $0.00 | $0 | Form 4 |
| 2026-07-09 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 6,259 | $0.00 | $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 | $0.00 | $0 | Form 4 |
| 2026-07-06 | Flammer Martina M.D. | Officer (Chief Medical Officer) | Option exercise / conversion (derivative) | 7,945 | $0.00 | $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 | $0.00 | $0 | Form 4 |
| 2026-06-25 | Lewis William | Director, Officer (Chair and CEO) | Option exercise / conversion (derivative) | 12,518 | $0.00 | $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 | $0.00 | $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 |
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 2026-07-09 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.