INSM
Insmed Inc
NASDAQ: INSM · HEALTHCARE · BIOTECHNOLOGY
$135.03
+0.07% today
Updated 2026-04-29
Market cap
$29.15B
P/E ratio
—
P/S ratio
48.06x
EPS (TTM)
$-6.42
Dividend yield
—
52W range
$64 – $213
Volume
2.3M
Insmed Inc (INSM) Insider transactions
Net insider activity
Net selling (200,283 shares)
Buy transactions
23
Sell transactions
77
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 5,373 | $143.81 | $772691.13 |
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 2,255 | $144.66 | $326208.30 |
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 2,246 | $142.99 | $321155.54 |
| 2026-04-16 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 825 | $145.79 | $120276.75 |
| 2026-04-06 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-04-06 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-04-06 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 8,478 | $163.23 | $1.38M |
| 2026-04-06 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-04-06 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-04-06 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,434 | $164.01 | $235190.34 |
| 2026-04-06 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 787 | $161.73 | $127281.51 |
| 2026-04-01 | ADSETT, ROGER | Chief Operating Officer | Sale | 88,060 | — | — |
| 2026-04-01 | ADSETT, ROGER | Chief Operating Officer | Buy | 88,060 | $14.56 | $1.28M |
| 2026-04-01 | ADSETT, ROGER | Chief Operating Officer | Sale | 62,344 | $164.95 | $10.28M |
| 2026-04-01 | ADSETT, ROGER | Chief Operating Officer | Sale | 19,001 | $164.11 | $3.12M |
| 2026-04-01 | ADSETT, ROGER | Chief Operating Officer | Sale | 6,715 | $163.18 | $1.10M |
| 2026-03-30 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 13,989 | — | — |
| 2026-03-30 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 5,649 | — | — |
| 2026-03-30 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 19,638 | $150.98 | $2.96M |
| 2026-03-30 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Buy | 13,989 | $27.89 | $390153.21 |
| 2026-03-30 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Buy | 5,649 | $17.07 | $96428.43 |
| 2026-03-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-03-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-03-19 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-03-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,537 | $143.42 | $650696.54 |
| 2026-03-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,533 | $144.11 | $653250.63 |
| 2026-03-19 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-03-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,629 | $142.17 | $231594.93 |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 3,899 | $146.66 | $571827.34 |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 2,589 | $145.27 | $376104.03 |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 2,128 | $147.54 | $313965.12 |
| 2026-03-05 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 2,083 | $144.23 | $300431.09 |
| 2026-03-03 | SHAROKY, MELVIN MD | Director | Sale | 100 | — | — |
| 2026-02-25 | SHAROKY, MELVIN MD | Director | Sale | 1,072 | — | — |
| 2026-02-25 | SHAROKY, MELVIN MD | Director | Buy | 243 | — | — |
| 2026-02-24 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 20,248 | — | — |
| 2026-02-24 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Buy | 20,248 | $17.07 | $345633.36 |
| 2026-02-24 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 15,771 | $156.53 | $2.47M |
| 2026-02-24 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 4,852 | $153.93 | $746868.36 |
| 2026-02-24 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 4,151 | $155.06 | $643654.06 |
| 2026-02-23 | BRENNAN, DAVID R | Director | Sale | 6,000 | — | — |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 3,413 | $151.12 | $515772.56 |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 2,377 | $151.92 | $361113.84 |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,988 | $149.17 | $296549.96 |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,891 | $150.10 | $283839.10 |
| 2026-02-19 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,030 | $153.38 | $157981.40 |
| 2026-02-09 | MCGIRR, DAVID W J | Director | Buy | 53,400 | — | — |
| 2026-02-09 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-02-09 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-02-09 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 7,221 | $148.02 | $1.07M |
| 2026-02-09 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-02-09 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,888 | $147.17 | $719366.96 |
| 2026-02-09 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-02-09 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,287 | $148.83 | $191544.21 |
| 2026-02-05 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 869 | $152.44 | $132470.36 |
| 2026-02-03 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 640 | $156.27 | $100012.80 |
| 2026-02-03 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 3,009 | $156.34 | $470427.06 |
| 2026-02-03 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 795 | $155.77 | $123837.15 |
| 2026-02-03 | BONSTEIN, SARA | Chief Financial Officer | Sale | 748 | $156.34 | $116942.32 |
| 2026-02-03 | ADSETT, ROGER | Chief Operating Officer | Sale | 791 | $156.17 | $123530.47 |
| 2026-02-02 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 7,982 | — | — |
| 2026-02-02 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Buy | 7,982 | $65.72 | $524577.04 |
| 2026-02-02 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 3,349 | $154.56 | $517621.44 |
| 2026-02-02 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 3,042 | $155.46 | $472909.32 |
| 2026-02-02 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 928 | $153.16 | $142132.48 |
| 2026-02-02 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 563 | $152.06 | $85609.78 |
| 2026-02-02 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 100 | $156.86 | $15686.00 |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 5,967 | $158.99 | $948693.33 |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 2,229 | $159.85 | $356305.65 |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,243 | $158.37 | $196853.91 |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 1,006 | $156.80 | $157740.80 |
| 2026-01-20 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 254 | $160.70 | $40817.80 |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,259 | — | — |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 4,440 | — | — |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 7,176 | $168.63 | $1.21M |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 6,996 | $169.57 | $1.19M |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 6,259 | $30.46 | $190649.14 |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Buy | 4,440 | $17.16 | $76190.40 |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 3,974 | $167.73 | $666559.02 |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 315 | $174.86 | $55080.90 |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 297 | $171.31 | $50879.07 |
| 2026-01-12 | LEWIS, WILLIAM | Director, Chair and CEO | Sale | 160 | $170.24 | $27238.40 |
| 2026-01-09 | FLAMMER, MARTINA M.D. | Chief Medical Officer | Sale | 1,887 | $186.19 | $351340.53 |
| 2026-01-08 | SMITH, MICHAEL ALEXANDER | Chief Legal Officer | Sale | 1,053 | $174.17 | $183401.01 |