INSMED Inc insider trading
INSM$111.12+2.53 (+2.33%)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-27.3%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
Unlock quarterly net flowKey players
- WLWilliam Lewis0.2257%
- MSMelvin Sharoky M.D.0.1227%
- JDJohn Drayton Wise0.0609%
- DRDavid R. Brennan0.0454%
- RARoger Adsett0.0452%
- DWDavid W. J. McGirr0.0447%
- CDClarissa Desjardins0.0336%
- SBSara Bonstein0.0316%
- CSCarol Schafer0.0305%
- EMElizabeth M. Anderson0.0284%
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| INSM | David R. Brennan | Open market sell$3.1M | -20.1% | $124.00 | $3.1M | Sep 9, 2026 | Sep 11, 2026 |
| INSM | Melvin Sharoky M.D. | Open market sell$638K | -1.8% | $127.53 | $638K | Aug 17, 2026 | Aug 19, 2026 |
| INSM | Michael Alexander Smith | Open market sell$173K | -4.6% | $95.82 | $173K | Jun 22, 2026 | Jun 24, 2026 |
| INSM | William Lewis | Open market sell$613K | -1.3% | $94.03 | $613K | Jun 8, 2026 | Jun 10, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$193K | -3.0% | $103.78 | $193K | Jun 5, 2026 | Jun 5, 2026 |
| INSM | Michael Alexander Smith | Open market sell$221K | -5.2% | $102.27 | $221K | Jun 3, 2026 | Jun 5, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$262K | -4.0% | $102.27 | $262K | Jun 3, 2026 | Jun 5, 2026 |
| INSM | Roger Adsett | Open market sell$242K | -2.4% | $102.27 | $242K | Jun 3, 2026 | Jun 5, 2026 |
| INSM | Sara Bonstein | Open market sell$246K | -3.4% | $102.27 | $246K | Jun 3, 2026 | Jun 5, 2026 |
| INSM | William Lewis | Open market sell$778K | -1.5% | $102.27 | $778K | Jun 3, 2026 | Jun 5, 2026 |
| INSM | Michael Alexander Smith | Open market sell$667K | -12.9% | $108.47 | $667K | May 22, 2026 | May 22, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$1.23M | -13.9% | $117.54 | $1.23M | May 14, 2026 | May 15, 2026 |
| INSM | Michael Alexander Smith | Open market sell$477K | -7.9% | $116.18 | $477K | May 13, 2026 | May 15, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$393K | -4.3% | $116.18 | $393K | May 13, 2026 | May 15, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$504K | -5.4% | $112.76 | $504K | May 13, 2026 | May 15, 2026 |
| INSM | Roger Adsett | Open market sell$678K | -5.5% | $116.18 | $678K | May 13, 2026 | May 15, 2026 |
| INSM | Sara Bonstein | Open market sell$961K | -10.4% | $116.18 | $961K | May 13, 2026 | May 15, 2026 |
| INSM | William Lewis | Open market sell$1.54M | -2.5% | $116.18 | $1.54M | May 13, 2026 | May 15, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$132K | -1.0% | $152.44 | $132K | Feb 5, 2026 | Feb 6, 2026 |
| INSM | Michael Alexander Smith | Open market sell$100K | -1.1% | $156.27 | $100K | Feb 3, 2026 | Feb 4, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$124K | -0.9% | $155.77 | $124K | Feb 3, 2026 | Feb 4, 2026 |
| INSM | Roger Adsett | Open market sell$124K | -0.7% | $156.17 | $124K | Feb 3, 2026 | Feb 4, 2026 |
| INSM | Sara Bonstein | Open market sell$117K | -0.9% | $156.34 | $117K | Feb 3, 2026 | Feb 4, 2026 |
| INSM | William Lewis | Open market sell$470K | -0.5% | $156.34 | $470K | Feb 3, 2026 | Feb 4, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$351K | -2.2% | $186.19 | $351K | Jan 9, 2026 | Jan 13, 2026 |
| INSM | Michael Alexander Smith | Open market sell$183K | -1.8% | $174.17 | $183K | Jan 8, 2026 | Jan 8, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$566K | -3.6% | $174.17 | $566K | Jan 8, 2026 | Jan 8, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$289K | -1.8% | $173.87 | $289K | Jan 8, 2026 | Jan 8, 2026 |
| INSM | Roger Adsett | Open market sell$359K | -1.9% | $174.17 | $359K | Jan 8, 2026 | Jan 8, 2026 |
| INSM | Sara Bonstein | Open market sell$252K | -1.8% | $174.17 | $252K | Jan 8, 2026 | Jan 8, 2026 |
| INSM | William Lewis | Open market sell$561K | -0.5% | $174.17 | $561K | Jan 8, 2026 | Jan 8, 2026 |
| INSM | Michael Alexander Smith | Open market sell$124K | -1.2% | $175.07 | $124K | Jan 7, 2026 | Jan 8, 2026 |
| INSM | Martina Flammer M.D. | Open market sell$252K | -1.5% | $175.84 | $252K | Jan 7, 2026 | Jan 8, 2026 |
| INSM | Roger Adsett | Open market sell$140K | -0.7% | $175.07 | $140K | Jan 7, 2026 | Jan 8, 2026 |
| INSM | Sara Bonstein | Open market sell$294K | -2.0% | $175.07 | $294K | Jan 7, 2026 | Jan 8, 2026 |
| INSM | William Lewis | Open market sell$413K | -0.4% | $175.07 | $413K | Jan 7, 2026 | Jan 8, 2026 |
| INSM | Michael Alexander Smith | Open market sell$242K | -2.3% | $173.33 | $242K | Jan 6, 2026 | Jan 8, 2026 |
| INSM | Roger Adsett | Open market sell$248K | -1.3% | $173.33 | $248K | Jan 6, 2026 | Jan 8, 2026 |
| INSM | Sara Bonstein | Open market sell$263K | -1.8% | $173.33 | $263K | Jan 6, 2026 | Jan 8, 2026 |
| INSM | William Lewis | Open market sell$710K | -0.7% | $173.33 | $710K | Jan 6, 2026 | Jan 8, 2026 |
| INSM | Melvin Sharoky M.D. | Open market sell$4.1M | -6.9% | $205.01 | $4.1M | Dec 5, 2025 | Dec 9, 2025 |
| INSM | Elizabeth M. Anderson | Open market sell$1.02M | -7.9% | $204.58 | $1.02M | Nov 24, 2025 | Nov 26, 2025 |
| INSM | Leo Lee | Open market sell$3M | -21.7% | $197.40 | $3M | Nov 17, 2025 | Nov 18, 2025 |
| INSM | Leo Lee | Open market sell$4.73M | -25.6% | $196.61 | $4.73M | Nov 17, 2025 | Nov 18, 2025 |
| INSM | Leo Lee | Open market sell$2.92M | -13.7% | $195.39 | $2.92M | Nov 17, 2025 | Nov 18, 2025 |
| INSM | Leo Lee | Open market sell$3.42M | -13.9% | $194.49 | $3.42M | Nov 17, 2025 | Nov 18, 2025 |
| INSM | Leo Lee | Open market sell$622K | -2.5% | $193.51 | $622K | Nov 17, 2025 | Nov 18, 2025 |
| INSM | Elizabeth M. Anderson | Open market sell$1.96M | -13.6% | $195.87 | $1.96M | Nov 14, 2025 | Nov 18, 2025 |