INSMED CEO William Lewis Exercises Options and Sells Shares Under 10b5-1 Plan

INSMED Inc (INSM) Chair and CEO William Lewis filed a Form 4 disclosing significant stock transactions on June 25, 2026. Lewis exercised stock options to acquire 21,398 shares at exercise prices of $30.46 and $17.16 per share, while simultaneously selling 21,398 shares at prices ranging from $102.34 to $106.27 per share. The transactions were executed pursuant to a Rule 10b5-1 trading plan adopted on September 4, 2025. Following these transactions, Lewis directly owns 258,917 shares and indirectly holds 233,924 shares through a trust, for a total ownership of 492,841 shares. The option exercises involved shares that vested according to a schedule where 25% vested on the first anniversary of grant and 12.5% every six months thereafter.