INSMED Inc 4

Insmed Inc. Chief Legal Officer Michael Alexander Smith sold 2,159 shares of common stock at about $102.27 per share on June 3, 2026 to cover tax withholding on RSU vesting, leaving him with 39,454 shares.

On June 3, 2026, Michael Alexander Smith, Chief Legal Officer of Insmed Inc., sold 2,159 shares of the company’s common stock at an average price of approximately $102.27 per share, for proceeds of about $220,900. The Form 4 notes that these shares were sold solely to satisfy tax withholding obligations and related broker fees arising from the vesting of Restricted Stock Units, indicating a routine administrative transaction rather than a discretionary open-market sale. Following this sale, Smith directly owned 39,454 shares of Insmed common stock, which, using the transaction price as a proxy, represent an equity stake valued at roughly $4.0 million.

Filing Facts

CIK

1104506

Ticker

INSM

Form

4

Source Type

fda

Accession

0001870278-26-000017

Alert Tier

5