Form 4 for INSM INSMED Inc
Accepted 2026-03-05 00:00:00 ET · period of report 2026-03-05 · accession 0001402051-26-000018 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-03-05 | 2026-03-05 | INSM | Lewis William | COB, CEO, Dir | S - Sale+OE | $146.03 | -10.7K | 303.3K | -3% | -$1.56M |
| DM | 2026-03-05 | 2026-03-05 | INSM | Lewis William | COB, CEO, Dir | M - OptEx | $24.94 | +10.7K | 311.9K | +4% | +$266.8K |
| DM | 2026-03-05 | 2026-03-05 | INSM | Lewis William | COB, CEO, Dir | M - OptEx | $0.00 | -10.7K | 56.3K | -16% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-03-05 | S | D | 2,128 | $147.54 | 301,185 | D | — | — | (F5) This is the weighted average sales price representing 2,128 shares sold at prices ranging from $147.15 to $148.04 per share. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer the number of shares sold at each price within the price range upon request. (F6) The Reporting Person no longer has a reportable beneficial interest in the securities owned by the William Lewis Family Legacy Trust, which were included in the Reporting Person's prior ownership reports. |
| 2 | Common | Common Stock | 2026-03-05 | M | A | 6,259 | $30.46 | 307,444 | D | — | — | |
| 3 | Common | Common Stock | 2026-03-05 | M | A | 4,440 | $17.16 | 311,884 | D | — | — | |
| 4 | Common | Common Stock | 2026-03-05 | S | D | 2,083 | $144.23 | 309,801 | D | — | — | (F2) This is the weighted average sales price representing 2,083 shares sold at prices ranging from $143.84 to $144.70 per share. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer the number of shares sold at each price within the price range upon request. |
| 5 | Common | Common Stock | 2026-03-05 | S | D | 2,589 | $145.27 | 307,212 | D | — | — | (F3) This is the weighted average sales price representing 2,589 shares sold at prices ranging from $144.99 to $145.78 per share. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer the number of shares sold at each price within the price range upon request. |
| 6 | Common | Common Stock | 2026-03-05 | S | D | 3,899 | $146.66 | 303,313 | D | — | — | (F4) This is the weighted average sales price representing 3,899 shares sold at prices ranging from $146.09 to $147.06 per share. The Reporting Person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer the number of shares sold at each price within the price range upon request. |
| 7 | Derivative | Stock Option (right to buy) | 2026-03-05 | M | D | 4,440 | $0.00 | 39,960 | D | $17.16 · — to 2027-05-17 | 4,440 Common Stock | (F7) The options became exercisable based on the following vesting schedule: 25% vested on the first anniversary of the grant date and an additional 12.5% vested on each sixth month anniversary date thereafter through the fourth anniversary of the date of grant. |
| 8 | Derivative | Stock Option (right to buy) | 2026-03-05 | M | D | 6,259 | $0.00 | 56,332 | D | $30.46 · — to 2028-01-04 | 6,259 Common Stock | (F7) The options became exercisable based on the following vesting schedule: 25% vested on the first anniversary of the grant date and an additional 12.5% vested on each sixth month anniversary date thereafter through the fourth anniversary of the date of grant. |