SEC Form 4 · Updated Daily
INSM
— INSMED INCORPORATED OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Venkatesan Jay | Director | 3,116,100 | 2012-09-28 | — |
| ACM Capital Partners, LLC | 10%+ Owner | 3,116,100 | 2012-09-28 | — |
| Ayer Capital Partners, LLC | 10%+ Owner | 3,116,100 | 2012-09-28 | — |
| Ayer Capital Management, LP | 10%+ Owner | 3,116,100 | 2012-09-28 | — |
| ALLAN GEOFFREY | Director · Officer | 2,357,838 | 2009-03-31 | M |
| Glover Stephen C. | Director | 601,226 | 2009-03-31 | M |
| TULLY KEVIN P | Officer | 597,290 | 2009-03-31 | M |
| Farrar Doug | Officer | 488,484 | 2009-03-31 | M |
| FMR LLC | Reporting Owner | 379,496 | 2013-07-19 | S |
| Adsett Roger | Officer | 338,594 | 2026-08-10 | M |
| ENGELSEN STEINAR J | Director | 320,802 | 2021-11-01 | P |
| Lewis William | Director · Officer | 269,758 | 2026-07-23 | M |
| CROOKE GRAHAM K | Director | 228,404 | 2010-06-09 | A |
| Kelley Glen L | Officer | 213,712 | 2009-03-31 | — |
| CONDON KENNETH G | Director | 168,504 | 2010-06-09 | A |
| Lanfear Dennis M | Director · Officer | 168,404 | 2010-06-09 | A |
| Pellizzari Christine A | Officer | 149,985 | 2021-05-15 | F |
| Wise John Drayton | Officer | 140,935 | 2025-02-05 | A |
| Schaeffer Orlov S Nicole | Officer | 129,044 | 2026-01-02 | M |
| LaBella Nicholas A. Jr. | Officer | 100,000 | 2010-03-22 | — |
| Flammer Martina M.D. | Officer | 87,659 | 2026-08-06 | M |
| Desjardins Clarissa | Director | 70,312 | 2026-05-13 | A |
| ALTOMARI ALFRED | Director | 69,495 | 2024-05-13 | A |
| WHITCOMB RANDALL W | Director | 69,188 | 2015-03-10 | M |
| Bonstein Sara | Officer | 69,082 | 2026-06-03 | S |
| HAYDEN DONALD J JR | Director | 68,483 | 2019-04-09 | M |
| SCHAFER CAROL | Officer | 66,622 | 2026-05-13 | A |
| ANDERSON ELIZABETH M | Director | 62,034 | 2026-05-13 | A |
| LEE LEO | Director | 57,971 | 2026-05-13 | A |
| MCGIRR DAVID W J | Director | 53,400 | 2026-02-09 | G |
| SORIANO JOHN | Officer | 52,553 | 2021-09-07 | M |
| GUPTA RENU | Officer | 47,407 | 2014-01-31 | M |
| Drucker Andrea Holtzman | Officer | 45,000 | 2013-06-03 | M |
| Brennan David R | Director | 39,238 | 2026-09-09 | S |
| Smith Michael Alexander | Officer | 37,648 | 2026-06-22 | S |
| POTTER MYRTLE S | Director | 25,510 | 2018-05-15 | A |
| Drechsler Andrew T | Officer | 25,000 | 2017-03-01 | M |
| Kollender Richard S | Director | 24,598 | 2013-10-31 | M |
| STRECK PAUL | Officer | 15,996 | 2018-08-08 | A |
| GOLL JOHN | Officer | 14,374 | 2020-01-03 | A |
| Quigley Mark | Officer | 12,656 | 2015-05-12 | M |
| TOMBESI PAOLO | Officer | 10,669 | 2018-01-04 | A |
| Whitten Timothy | Director · Officer | 10,000 | 2012-06-01 | P |
| Butera Samuele | Officer | 7,342 | 2026-06-23 | A |
| Koppikar Utpal | Director | 6,139 | 2026-10-19 | A |
| Hudson Paul | Director | 6,139 | 2026-10-19 | A |
| SHAROKY MELVIN MD | Director | 0 | 2026-08-17 | S |
| Gurreri Nicholas Lee | Officer | 0 | 2010-12-01 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-19 | Hudson Paul | Grant / award | 6,139 | — | 6,139 |
| 2026-10-19 | Koppikar Utpal | Grant / award | 6,139 | — | 6,139 |
| 2026-09-09 | Brennan David R | Open-market sale | 25,000 | $124.00 | 39,238 |
| 2026-08-17 | SHAROKY MELVIN MD | Open-market sale | 5,000 | $127.53 | 0 |
| 2026-08-10 | Adsett Roger | Option exercise (derivative) | 82,280 | $0.00 | 0 |
| 2026-08-10 | Adsett Roger | Open-market sale | 239,850 | $133.27 | 98,744 |
| 2026-08-10 | Adsett Roger | Option exercise | 80,970 | $30.46 | 338,594 |
| 2026-08-10 | Adsett Roger | Option exercise | 76,600 | $17.16 | 257,624 |
| 2026-08-10 | Adsett Roger | Option exercise | 82,280 | $13.67 | 181,024 |
| 2026-08-06 | Flammer Martina M.D. | Option exercise (derivative) | 8,895 | $0.00 | 35,580 |
| 2026-08-06 | Flammer Martina M.D. | Option exercise (derivative) | 18,278 | $0.00 | 36,555 |
| 2026-08-06 | Flammer Martina M.D. | Open-market sale | 18,278 | $129.40 | 60,486 |
| 2026-08-06 | Flammer Martina M.D. | Open-market sale | 8,895 | $127.00 | 78,764 |
| 2026-08-06 | Flammer Martina M.D. | Option exercise | 8,895 | $25.83 | 87,659 |
| 2026-08-06 | Flammer Martina M.D. | Option exercise | 18,278 | $18.95 | 78,764 |
| 2026-07-23 | Lewis William | Option exercise (derivative) | 6,260 | $0.00 | 0 |
| 2026-07-23 | Lewis William | Open-market sale | 5,872 | $106.43 | 259,058 |
| 2026-07-23 | Lewis William | Open-market sale | 4,828 | $105.62 | 264,930 |
| 2026-07-23 | Lewis William | Option exercise | 4,440 | $17.16 | 269,758 |
| 2026-07-23 | Lewis William | Option exercise | 6,260 | $30.46 | 265,318 |
| 2026-07-09 | Lewis William | Option exercise (derivative) | 4,440 | $0.00 | 4,440 |
| 2026-07-09 | Lewis William | Option exercise (derivative) | 6,259 | $0.00 | 6,260 |
| 2026-07-09 | Lewis William | Open-market sale | 3,359 | $118.52 | 259,058 |
| 2026-07-09 | Lewis William | Open-market sale | 2,335 | $117.62 | 262,417 |
| 2026-07-09 | Lewis William | Open-market sale | 5,005 | $116.55 | 264,752 |
| 2026-07-09 | Lewis William | Option exercise | 4,440 | $17.16 | 269,757 |
| 2026-07-09 | Lewis William | Option exercise | 6,259 | $30.46 | 265,317 |
| 2026-07-06 | Flammer Martina M.D. | Option exercise (derivative) | 4,357 | $0.00 | 4,358 |
| 2026-07-06 | Flammer Martina M.D. | Option exercise (derivative) | 7,945 | $0.00 | 23,835 |
| 2026-07-06 | Flammer Martina M.D. | Open-market sale | 7,448 | $110.60 | 60,486 |
| 2026-07-06 | Flammer Martina M.D. | Open-market sale | 4,854 | $109.02 | 67,934 |
| 2026-07-06 | Flammer Martina M.D. | Option exercise | 4,357 | $19.74 | 72,788 |
| 2026-07-06 | Flammer Martina M.D. | Option exercise | 7,945 | $29.13 | 68,431 |
| 2026-06-25 | Lewis William | Option exercise (derivative) | 8,880 | $0.00 | 8,880 |
| 2026-06-25 | Lewis William | Option exercise (derivative) | 12,518 | $0.00 | 12,519 |
| 2026-06-25 | Lewis William | Open-market sale | 1,292 | $106.27 | 258,917 |
| 2026-06-25 | Lewis William | Open-market sale | 2,456 | $105.27 | 260,209 |
| 2026-06-25 | Lewis William | Open-market sale | 3,723 | $104.28 | 262,665 |
| 2026-06-25 | Lewis William | Open-market sale | 1,836 | $103.10 | 266,388 |
| 2026-06-25 | Lewis William | Open-market sale | 12,091 | $102.34 | 268,224 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.