SEC Form 4 · accession 0001796960-26-000020
INSMED Inc · INSM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Martina Flammer M.D.
Officer — Chief Medical Officer
Period of report
Aug 6, 2026
Accepted (ET)
Aug 7, 2026 · 4:39 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001104506
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Aug 6, 2026 | M | 18,278 | $18.95 | A | 78,764 | D | |
| Common Stock | Aug 6, 2026 | M | 8,895 | $25.83 | A | 87,659 | D | |
| Common Stock | Aug 6, 2026 | S | 8,895 | $127.00 | D | 78,764 | D | |
| Common StockF2 | Aug 6, 2026 | S | 18,278 | $129.40 | D | 60,486 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (right to buy)F3 | $18.95 | Aug 6, 2026 | M | 18,278 | D | — | May 11, 2033 | Common Stock | 18,278 | 36,555 | D |
| Stock Option (right to buy)F4 | $25.83 | Aug 6, 2026 | M | 8,895 | D | — | May 13, 2034 | Common Stock | 8,895 | 35,580 | D |
Explanation of responses
- F1This transaction was effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on February 27, 2025 in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.
- F2This is the weighted average sales price representing 18,278 shares sold at prices ranging from $129.40 to $129.41 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.
- F3The options become exercisable based on the following vesting schedule: 25% vest on the first anniversary of the grant date and an additional 12.5% vest on each sixth month anniversary date thereafter through the fourth anniversary of the date of grant.
- F4The options become exercisable based on the following vesting schedule: 25% vest on the first day of the first month following the first anniversary of the date of grant (the Initial Vesting Date) and 12.5% vest on each sixth month anniversary date thereafter through the fourth anniversary of the Initial Vesting Date.