Form 4: INSMED CEO Sells Shares
Insider Transaction (Form 4)
William Lewis, Chair and CEO and a Director of INSMED Inc, sold 10,700 shares of common stock on July 23, 2026.
Summary
- Option exercise/conversion: acquired 6,260 Common Stock at $30.46 ($190,680) on July 23, 2026; holds 265,318 after (Direct).
- Option exercise/conversion: acquired 4,440 Common Stock at $17.16 ($76,190) on July 23, 2026; holds 269,758 after (Direct).
- Open-market sale: disposed of 4,828 Common Stock at $105.62 ($509,933) on July 23, 2026; holds 264,930 after (Direct).
- Open-market sale: disposed of 5,872 Common Stock at $106.43 ($624,957) on July 23, 2026; holds 259,058 after (Direct).
- Option exercise/conversion: disposed of 6,260 Stock Option (right to buy) on July 23, 2026 (Direct).
- Option exercise/conversion: disposed of 4,440 Stock Option (right to buy) on July 23, 2026 (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $1,134,890 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
William Lewis — Director, Officer (Chair and CEO)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-07-23 | Option exercise/conversion | Common Stock | 6,260 | $30 | $190.7K | 265,318 |
| 2026-07-23 | Option exercise/conversion | Common Stock | 4,440 | $17 | $76.2K | 269,758 |
| 2026-07-23 | Open-market sale | Common Stock | 4,828 | $106 | $509.9K | 264,930 |
| 2026-07-23 | Open-market sale | Common Stock | 5,872 | $106 | $625.0K | 259,058 |
| 2026-07-23 | Option exercise/conversion | Stock Option (right to buy) | 6,260 | — | — | 0 |
| 2026-07-23 | Option exercise/conversion | Stock Option (right to buy) | 4,440 | — | — | 0 |
Key Dates
| Date | Description |
|---|---|
| 2026-07-23 | Option exercise/conversion (6,260 shares) |
| 2026-07-23 | Option exercise/conversion (4,440 shares) |
| 2026-07-23 | Open-market sale (4,828 shares) |
| 2026-07-23 | Open-market sale (5,872 shares) |
| 2026-07-23 | Option exercise/conversion (6,260 shares) |
| 2026-07-23 | Option exercise/conversion (4,440 shares) |
Keywords
insider transaction, Form 4, INSM, INSMED Inc, bearish, William Lewis
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