INSMED Inc 4

COO Roger Adsett exercised 239,850 Insmed Inc. stock options and sold all 239,850 resulting common shares at about $133.27 per share, ending with 98,744 shares owned directly.

On August 10, 2026, Insmed Inc. Chief Operating Officer Roger Adsett exercised three tranches of stock options for a total of 239,850 shares of common stock at strike prices of $13.67, $17.16, and $30.46 per share, and on the same day sold the resulting 239,850 shares at a weighted average price of $133.27 per share in an open-market transaction, generating proceeds of roughly $31.9 million and realizing a substantial spread over the aggregate exercise cost of about $4.3 million. After these transactions, which appear to be a classic exercise-and-sell for liquidity rather than an outright new purchase or discretionary sale of existing holdings, Adsett’s direct ownership stood at 98,744 shares of Insmed common stock (including 141 shares from the company’s 2018 Employee Stock Purchase Plan); based on the sale price as a proxy, this residual stake is worth approximately $13.2 million. The options involved were previously granted employee stock options that had become exercisable under a standard vesting schedule and were fully exercised as of this date, leaving no remaining option balance at the exercised strike prices.

Filing Facts

CIK

1104506

Ticker

INSM

Form

4

Source Type

fda

Accession

0001685904-26-000014

Alert Tier

6