INSM
Insmed Incorporated$98.28+1.59 (+1.64%)Prev Close$96.72·MCap$20.41B·P/E—·Vol3.39M·Yield—
▲
Buys (12M)
0
$0.00
▼
Sells (12M)
68
$206.37M
◆
Net Activity
Net Seller
$206.37M
●
Active Insiders
9
last 12 mo
Over the past 12 months, insider activity at Insmed Incorporated (INSM) has been exclusively selling, with 0 insider purchases totaling $0.00 and 68 insider sales totaling $206.37M. The most recent insider transaction was by Lewis William (director, officer: Chair and CEO), who sold $612.6K worth of shares on Jun 10, 2026. Insmed Incorporated operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $20.41B.
INSM Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jun 10, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 6,515 | $94.03 | $612.6K | 258,917 |
| Jun 5, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 7,605 | $102.27 | $777.8K | 265,432 |
| Jun 5, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 2,159 | $102.27 | $220.8K | 39,454 |
| Jun 5, 2026 | Flammer Martina M.D. | officer: Chief Medical Officer | Sell | 4,424 | $102.90 | $455.2K | 62,344 |
| Jun 5, 2026 | Adsett Roger | officer: Chief Operating Officer | Sell | 2,370 | $102.27 | $242.4K | 98,603 |
| Jun 5, 2026 | Bonstein Sara | officer: Chief Financial Officer | Sell | 2,404 | $102.27 | $245.9K | 69,082 |
| May 22, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 6,149 | $108.47 | $667.0K | 41,613 |
| May 20, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 25,564 | $106.33 | $2.72M | 292,848 |
| May 15, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 4,109 | $116.18 | $477.4K | 47,762 |
| May 15, 2026 | Adsett Roger | officer: Chief Operating Officer | Sell | 5,837 | $116.18 | $678.1K | 100,973 |
| May 15, 2026 | Bonstein Sara | officer: Chief Financial Officer | Sell | 8,272 | $116.18 | $961.0K | 71,486 |
| May 15, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 13,283 | $116.18 | $1.54M | 287,902 |
| May 15, 2026 | Flammer Martina M.D. | officer: Chief Medical Officer | Sell | 18,333 | $116.12 | $2.13M | 78,773 |
| May 13, 2026 | Flammer Martina M.D. | officer: Chief Medical Officer | Sell | 12,949 | $100.40 | $1.30M | 84,073 |
| May 6, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $137.34 | $1.47M | 311,451 |
| Apr 17, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $143.97 | $1.54M | 309,638 |
| Apr 8, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $163.22 | $1.75M | 311,097 |
| Apr 3, 2026 | Adsett Roger | officer: Chief Operating Officer | Sell | 88,060 | $164.63 | $14.50M | 188,155-32% |
| Mar 31, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 19,638 | $150.98 | $2.96M | 51,871-27% |
| Mar 20, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $143.52 | $1.54M | 310,255 |
| Feb 25, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 24,774 | $155.77 | $3.86M | 71,793-26% |
| Feb 19, 2026 | Lewis William | Chair and CEO | Sell | 10,699 | $150.97 | $1.62M | 0 |
| Feb 9, 2026 | Lewis William | Chair and CEO | Sell | 13,396 | $147.79 | $1.98M | 0 |
| Feb 5, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 869 | $152.44 | $132.5K | 0 |
| Feb 3, 2026 | Adsett Roger | Chief Operating Officer | Sell | 791 | $156.17 | $123.5K | 0 |
| Feb 3, 2026 | Bonstein Sara | Chief Financial Officer | Sell | 748 | $156.34 | $116.9K | 0 |
| Feb 3, 2026 | Lewis William | Chair and CEO | Sell | 3,009 | $156.34 | $470.4K | 0 |
| Feb 3, 2026 | Smith Michael Alexander | Chief Legal Officer | Sell | 640 | $156.27 | $100.0K | 0 |
| Feb 2, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 8,777 | $154.70 | $1.36M | 0 |
| Jan 20, 2026 | Lewis William | Chair and CEO | Sell | 10,699 | $158.93 | $1.70M | 0 |
| Jan 12, 2026 | Lewis William | Chair and CEO | Sell | 19,215 | $169.00 | $3.25M | 0 |
| Jan 9, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 1,887 | $186.19 | $351.3K | 0 |
| Jan 6, 2026 | Adsett Roger | Chief Operating Officer | Sell | 4,290 | $174.06 | $746.7K | 0 |
| Jan 6, 2026 | Bonstein Sara | Chief Financial Officer | Sell | 4,642 | $174.22 | $808.7K | 0 |
| Jan 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 16,530 | $174.06 | $2.88M | 0 |
| Jan 6, 2026 | Lewis William | Chair and CEO | Sell | 9,676 | $174.03 | $1.68M | 0 |
| Jan 6, 2026 | Smith Michael Alexander | Chief Legal Officer | Sell | 3,158 | $174.00 | $549.5K | 0 |
| Jan 2, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 12,303 | $171.38 | $2.11M | 0 |
| Jan 2, 2026 | Schaeffer Orlov S Nicole | Chief People Strategy Officer | Sell | 87,290 | $175.20 | $15.29M | 0 |
| Dec 18, 2025 | Lewis William | Chair and CEO | Sell | 10,699 | $166.97 | $1.79M | 0 |
| Dec 5, 2025 | SHAROKY MELVIN MD | Director | Sell | 20,000 | $205.01 | $4.10M | 0 |
| Dec 4, 2025 | Lewis William | Chair and CEO | Sell | 10,699 | $205.62 | $2.20M | 0 |
| Dec 1, 2025 | Flammer Martina M.D. | Chief Medical Officer | Sell | 8,895 | $206.98 | $1.84M | 0 |
| Nov 24, 2025 | ANDERSON ELIZABETH M | Director | Sell | 5,000 | $204.58 | $1.02M | 0 |
| Nov 17, 2025 | LEE LEO | Director | Sell | 75,000 | $195.90 | $14.69M | 0 |
| Nov 14, 2025 | ANDERSON ELIZABETH M | Director | Sell | 10,000 | $195.87 | $1.96M | 0 |
| Nov 12, 2025 | Schaeffer Orlov S Nicole | Chief People Strategy Officer | Sell | 30,000 | $194.00 | $5.82M | 0 |
| Nov 11, 2025 | Flammer Martina M.D. | Chief Medical Officer | Sell | 31,226 | $189.68 | $5.92M | 0 |
| Nov 3, 2025 | Smith Michael Alexander | Chief Legal Officer | Sell | 27,130 | $183.78 | $4.99M | 0 |
| Sep 12, 2025 | Schaeffer Orlov S Nicole | Chief People Strategy Officer | Sell | 76,520 | $145.45 | $11.13M | 0 |
Showing 1–50 of 225
1 / 5
INSM Insider Buying Activity
The following table shows recent insider purchases of Insmed Incorporated (INSM) stock reported via SEC Form 4 filings.
No insider buying activity found for INSM in the last 12 months.
INSM Insider Selling Activity
The following table shows recent insider sales of Insmed Incorporated (INSM) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jun 10, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 6,515 | $94.03 | $612.6K | 258,917 |
| Jun 5, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 7,605 | $102.27 | $777.8K | 265,432 |
| Jun 5, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 2,159 | $102.27 | $220.8K | 39,454 |
| Jun 5, 2026 | Flammer Martina M.D. | officer: Chief Medical Officer | Sell | 4,424 | $102.90 | $455.2K | 62,344 |
| Jun 5, 2026 | Adsett Roger | officer: Chief Operating Officer | Sell | 2,370 | $102.27 | $242.4K | 98,603 |
| Jun 5, 2026 | Bonstein Sara | officer: Chief Financial Officer | Sell | 2,404 | $102.27 | $245.9K | 69,082 |
| May 22, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 6,149 | $108.47 | $667.0K | 41,613 |
| May 20, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 25,564 | $106.33 | $2.72M | 292,848 |
| May 15, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 4,109 | $116.18 | $477.4K | 47,762 |
| May 15, 2026 | Adsett Roger | officer: Chief Operating Officer | Sell | 5,837 | $116.18 | $678.1K | 100,973 |
| May 15, 2026 | Bonstein Sara | officer: Chief Financial Officer | Sell | 8,272 | $116.18 | $961.0K | 71,486 |
| May 15, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 13,283 | $116.18 | $1.54M | 287,902 |
| May 15, 2026 | Flammer Martina M.D. | officer: Chief Medical Officer | Sell | 18,333 | $116.12 | $2.13M | 78,773 |
| May 13, 2026 | Flammer Martina M.D. | officer: Chief Medical Officer | Sell | 12,949 | $100.40 | $1.30M | 84,073 |
| May 6, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $137.34 | $1.47M | 311,451 |
| Apr 17, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $143.97 | $1.54M | 309,638 |
| Apr 8, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $163.22 | $1.75M | 311,097 |
| Apr 3, 2026 | Adsett Roger | officer: Chief Operating Officer | Sell | 88,060 | $164.63 | $14.50M | 188,155-32% |
| Mar 31, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 19,638 | $150.98 | $2.96M | 51,871-27% |
| Mar 20, 2026 | Lewis William | director, officer: Chair and CEO | Sell | 10,699 | $143.52 | $1.54M | 310,255 |
| Feb 25, 2026 | Smith Michael Alexander | officer: Chief Legal Officer | Sell | 24,774 | $155.77 | $3.86M | 71,793-26% |
| Feb 19, 2026 | Lewis William | Chair and CEO | Sell | 10,699 | $150.97 | $1.62M | 0 |
| Feb 9, 2026 | Lewis William | Chair and CEO | Sell | 13,396 | $147.79 | $1.98M | 0 |
| Feb 5, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 869 | $152.44 | $132.5K | 0 |
| Feb 3, 2026 | Adsett Roger | Chief Operating Officer | Sell | 791 | $156.17 | $123.5K | 0 |
| Feb 3, 2026 | Bonstein Sara | Chief Financial Officer | Sell | 748 | $156.34 | $116.9K | 0 |
| Feb 3, 2026 | Lewis William | Chair and CEO | Sell | 3,009 | $156.34 | $470.4K | 0 |
| Feb 3, 2026 | Smith Michael Alexander | Chief Legal Officer | Sell | 640 | $156.27 | $100.0K | 0 |
| Feb 2, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 8,777 | $154.70 | $1.36M | 0 |
| Jan 20, 2026 | Lewis William | Chair and CEO | Sell | 10,699 | $158.93 | $1.70M | 0 |
| Jan 12, 2026 | Lewis William | Chair and CEO | Sell | 19,215 | $169.00 | $3.25M | 0 |
| Jan 9, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 1,887 | $186.19 | $351.3K | 0 |
| Jan 6, 2026 | Adsett Roger | Chief Operating Officer | Sell | 4,290 | $174.06 | $746.7K | 0 |
| Jan 6, 2026 | Bonstein Sara | Chief Financial Officer | Sell | 4,642 | $174.22 | $808.7K | 0 |
| Jan 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 16,530 | $174.06 | $2.88M | 0 |
| Jan 6, 2026 | Lewis William | Chair and CEO | Sell | 9,676 | $174.03 | $1.68M | 0 |
| Jan 6, 2026 | Smith Michael Alexander | Chief Legal Officer | Sell | 3,158 | $174.00 | $549.5K | 0 |
| Jan 2, 2026 | Flammer Martina M.D. | Chief Medical Officer | Sell | 12,303 | $171.38 | $2.11M | 0 |
| Jan 2, 2026 | Schaeffer Orlov S Nicole | Chief People Strategy Officer | Sell | 87,290 | $175.20 | $15.29M | 0 |
| Dec 18, 2025 | Lewis William | Chair and CEO | Sell | 10,699 | $166.97 | $1.79M | 0 |
| Dec 5, 2025 | SHAROKY MELVIN MD | Director | Sell | 20,000 | $205.01 | $4.10M | 0 |
| Dec 4, 2025 | Lewis William | Chair and CEO | Sell | 10,699 | $205.62 | $2.20M | 0 |
| Dec 1, 2025 | Flammer Martina M.D. | Chief Medical Officer | Sell | 8,895 | $206.98 | $1.84M | 0 |
| Nov 24, 2025 | ANDERSON ELIZABETH M | Director | Sell | 5,000 | $204.58 | $1.02M | 0 |
| Nov 17, 2025 | LEE LEO | Director | Sell | 75,000 | $195.90 | $14.69M | 0 |
| Nov 14, 2025 | ANDERSON ELIZABETH M | Director | Sell | 10,000 | $195.87 | $1.96M | 0 |
| Nov 12, 2025 | Schaeffer Orlov S Nicole | Chief People Strategy Officer | Sell | 30,000 | $194.00 | $5.82M | 0 |
| Nov 11, 2025 | Flammer Martina M.D. | Chief Medical Officer | Sell | 31,226 | $189.68 | $5.92M | 0 |
| Nov 3, 2025 | Smith Michael Alexander | Chief Legal Officer | Sell | 27,130 | $183.78 | $4.99M | 0 |
| Sep 12, 2025 | Schaeffer Orlov S Nicole | Chief People Strategy Officer | Sell | 76,520 | $145.45 | $11.13M | 0 |
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