INSM
insider transactionsINSMED Inc — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 30d
-25.5K
0 buy · 25.5K sell
Net value · 30d
-$2.6M
$0 in · $2.6M out
Sentiment · 30d
Net selling
0% buying · 100% selling
Open-market trades · 30d
7
0 buy · 25.5K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Grant·A
Director
$0
5.0K sh
Own New
-
Grant·A
Director
$0
14.6K sh
Own New
-
Grant·A
Director
$0
3.6K sh
Own New
-
Sell·S
William Lewis KEY
Chair and CEO · 10b5-1
$612.6K
6.5K sh · $94.03
Own -2%
-
Sell·S
Chief Medical Officer · 10b5-1
$192.8K
1.9K sh · $103.78
Own -3%
-
Sell·S
Chief Legal Officer
$220.8K
2.2K sh · $102.27
Own -5%
-
Sell·S
William Lewis KEY
Chair and CEO
$777.8K
7.6K sh · $102.27
Own -3%
-
Sell·S
Chief Medical Officer · 10b5-1
$262.4K
2.6K sh · $102.27
Own -4%
-
Sell·S
Sara Bonstein KEY
Chief Financial Officer
$245.9K
2.4K sh · $102.27
Own -3%
-
Sell·S
Chief Operating Officer
$242.4K
2.4K sh · $102.27
Own -2%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 11, 2026 | Sara Bonstein | Grant A | 5.0K | $0 |
| Jun 11, 2026 | Roger Adsett | Grant A | 14.6K | $0 |
| Jun 11, 2026 | Roger Adsett | Grant A | 3.6K | $0 |
| Jun 8, 2026 | William Lewis KEY 10b5-1 | Sell S | 6.5K | $612.6K |
| Jun 5, 2026 | Martina Flammer M.D. 10b5-1 | Sell S | 1.9K | $192.8K |
| Jun 3, 2026 | Michael Alexander Smith | Sell S | 2.2K | $220.8K |
| Jun 3, 2026 | William Lewis KEY | Sell S | 7.6K | $777.8K |
| Jun 3, 2026 | Martina Flammer M.D. 10b5-1 | Sell S | 2.6K | $262.4K |
| Jun 3, 2026 | Sara Bonstein KEY | Sell S | 2.4K | $245.9K |
| Jun 3, 2026 | Roger Adsett | Sell S | 2.4K | $242.4K |
About INSM insider trading
This page tracks insider transactions for INSMED Inc (INSM) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.