There have been 50 recent insider transactions recorded for Insmed Incorporated (INSM), including 1 buy and 43 sells. Total insider buying was valued at $74.98K and total insider selling at $14.12M.
Notable insiders with recent activity include Adsett Roger, Smith Michael Alexander, Lewis William. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — INSM
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-04-01 |
Adsett Roger |
Chief Operating Officer |
Option Exercise (Sell) |
88,060 |
$14.56 |
$1.28M |
- |
| 2026-03-30 |
Smith Michael Alexander |
Chief Legal Officer |
Option Exercise (Sell) |
5,649 |
$17.07 |
$96.43K |
8,633 |
| 2026-03-19 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
4,440 |
$17.16 |
$76.19K |
35,520 |
| 2026-03-05 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
4,440 |
$17.16 |
$76.19K |
39,960 |
| 2026-03-03 |
Sharoky Melvin Md |
Director |
Gift (Given) |
100 |
- |
- |
242,776 |
| 2026-02-25 |
Sharoky Melvin Md |
Director |
Gift (Received) |
243 |
- |
- |
819 |
| 2026-02-24 |
Smith Michael Alexander |
Chief Legal Officer |
Option Exercise (Sell) |
20,248 |
$17.07 |
$345.63K |
14,282 |
| 2026-02-23 |
Brennan David R |
Director |
Gift (Given) |
6,000 |
- |
- |
60,933 |
| 2026-02-19 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
4,440 |
$17.16 |
$76.19K |
44,400 |
| 2026-02-09 |
Mcgirr David W J |
Director |
Gift (Given) |
53,400 |
- |
- |
44,323 |
| 2026-02-09 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
4,440 |
$17.16 |
$76.19K |
48,840 |
| 2026-02-05 |
Flammer Martina M.d. |
Chief Medical Officer |
Informative Sell |
869 |
$152.44 |
$132.47K |
83,243 |
| 2026-02-03 |
Lewis William |
Chair and CEO |
Informative Sell |
3,009 |
$156.34 |
$470.43K |
303,882 |
| 2026-02-03 |
Bonstein Sara |
Chief Financial Officer |
Informative Sell |
748 |
$156.34 |
$116.94K |
79,758 |
| 2026-02-03 |
Adsett Roger |
Chief Operating Officer |
Informative Sell |
791 |
$156.17 |
$123.53K |
106,810 |
| 2026-02-03 |
Flammer Martina M.d. |
Chief Medical Officer |
Informative Sell |
795 |
$155.77 |
$123.84K |
84,112 |
| 2026-02-03 |
Smith Michael Alexander |
Chief Legal Officer |
Informative Sell |
640 |
$156.27 |
$100.01K |
56,397 |
| 2026-02-02 |
Flammer Martina M.d. |
Chief Medical Officer |
Option Exercise (Sell) |
7,982 |
$65.72 |
$524.58K |
23,948 |
| 2026-01-20 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
4,440 |
$17.16 |
$76.19K |
53,280 |
| 2026-01-12 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
4,440 |
$17.16 |
$76.19K |
57,720 |
| 2026-01-09 |
Flammer Martina M.d. |
Chief Medical Officer |
Informative Sell |
1,887 |
$186.19 |
$351.34K |
84,907 |
| 2026-01-08 |
Bonstein Sara |
Chief Financial Officer |
Informative Sell |
1,447 |
$174.17 |
$252.02K |
80,506 |
| 2026-01-08 |
Adsett Roger |
Chief Operating Officer |
Informative Sell |
2,059 |
$174.17 |
$358.62K |
107,601 |
| 2026-01-07 |
Bonstein Sara |
Chief Financial Officer |
Informative Sell |
1,678 |
$175.07 |
$293.77K |
81,953 |
| 2026-01-07 |
Adsett Roger |
Chief Operating Officer |
Informative Sell |
802 |
$175.07 |
$140.41K |
109,660 |
| 2026-01-06 |
Bonstein Sara |
Chief Financial Officer |
Informative Sell |
1,517 |
$173.33 |
$262.94K |
83,631 |
| 2026-01-06 |
Adsett Roger |
Chief Operating Officer |
Informative Sell |
1,429 |
$173.33 |
$247.69K |
110,462 |
| 2026-01-06 |
Flammer Martina M.d. |
Chief Medical Officer |
Informative Sell |
1,615 |
$173.33 |
$279.93K |
93,139 |
| 2025-06-23 |
Bonstein Sara |
Chief Financial Officer |
Option Exercise (Sell) |
12,636 |
$19.74 |
$249.43K |
25,124 |
| 2025-06-16 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
129,805 |
$10.85 |
$1.41M |
27,355 |
| 2025-06-16 |
Adsett Roger |
Chief Operating Officer |
Informative Sell |
4,186 |
$99.32 |
$415.75K |
130,637 |
| 2025-06-11 |
Schaeffer Orlov S Nicole |
Chief People Strategy Officer |
Option Exercise (Sell) |
70,000 |
$13.91 |
$973.7K |
87,290 |
| 2025-06-11 |
Flammer Martina M.d. |
Chief Medical Officer |
Option Exercise (Sell) |
19,423 |
$17.07 |
$331.55K |
64,744 |
| 2025-06-10 |
Schaeffer Orlov S Nicole |
Chief People Strategy Officer |
Option Exercise (Sell) |
38,300 |
$17.16 |
$657.23K |
- |
| 2025-06-10 |
Bonstein Sara |
Chief Financial Officer |
Option Exercise (Sell) |
23,740 |
$17.07 |
$405.24K |
35,610 |
| 2025-06-10 |
Flammer Martina M.d. |
Chief Medical Officer |
Option Exercise (Sell) |
25,740 |
$26.46 |
$681.08K |
17,160 |
| 2025-06-05 |
Smith Michael Alexander |
Chief Legal Officer |
Informative Sell |
1,879 |
$73.50 |
$138.11K |
67,718 |
| 2025-06-04 |
Mcgirr David W J |
Director |
Informative Sell |
3,000 |
$73.27 |
$219.81K |
97,723 |
| 2025-06-03 |
Mcgirr David W J |
Director |
Informative Sell |
3,250 |
$71.30 |
$231.73K |
100,723 |
| 2025-06-03 |
Schaeffer Orlov S Nicole |
Chief People Strategy Officer |
Informative Sell |
1,642 |
$71.50 |
$117.4K |
118,579 |
| 2025-06-03 |
Lewis William |
Chair and CEO |
Informative Sell |
5,472 |
$71.50 |
$391.25K |
308,758 |
| 2025-06-03 |
Bonstein Sara |
Chief Financial Officer |
Informative Sell |
1,579 |
$71.50 |
$112.9K |
113,288 |
| 2025-06-03 |
Adsett Roger |
Chief Operating Officer |
Informative Sell |
1,860 |
$71.50 |
$132.99K |
141,323 |
| 2025-06-03 |
Flammer Martina M.d. |
Chief Medical Officer |
Informative Sell |
1,686 |
$71.50 |
$120.55K |
83,111 |
| 2025-06-03 |
Smith Michael Alexander |
Chief Legal Officer |
Informative Sell |
1,448 |
$71.50 |
$103.53K |
69,597 |
| 2025-06-02 |
Lewis William |
Chair and CEO |
Option Exercise (Sell) |
6,830 |
$10.85 |
$74.11K |
157,160 |
| 2025-05-30 |
Smith Michael Alexander |
Chief Legal Officer |
Informative Sell |
20,000 |
$70.00 |
$1.4M |
71,045 |
| 2025-05-27 |
Sharoky Melvin Md |
Director |
Gift (Given) |
200 |
- |
- |
300,616 |
| 2025-05-21 |
Desjardins Clarissa |
Director |
Informative Buy |
1,130 |
$66.35 |
$74.98K |
3,025 |
| 2025-05-20 |
Sharoky Melvin Md |
Director |
Gift (Received) |
100 |
- |
- |
100 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
