INSMED Inc 4

Insmed Inc. Chair and CEO William Lewis exercised stock options for 21,398 shares and sold the same number of common shares on June 25, 2026, for roughly $2.2 million in total proceeds under a 10b5-1 trading plan.

On June 25, 2026, Insmed Inc. Chair and CEO William Lewis exercised two tranches of stock options for a total of 21,398 shares of common stock at strike prices of $30.46 and $17.16 and immediately sold 21,398 shares in multiple open-market transactions under a pre-arranged Rule 10b5-1 trading plan at weighted-average prices between approximately $102 and $106 per share. The gross value of the option exercises was about $651,000 while the gross proceeds from the sales were approximately $2.2 million, implying roughly $1.6 million in pre-tax spread realized. Following these transactions, Lewis directly owned 258,917 shares of Insmed common stock and had an additional 233,924 shares held indirectly via a trust, indicating he retained a substantial equity stake after monetizing a portion of his holdings tied to previously granted stock options.

Filing Facts

CIK

1104506

Ticker

INSM

Form

4

Source Type

sec

Accession

0001402051-26-000038

Alert Tier

7