Commodore Capital LP Increases Stake in PepGen Inc.

Commodore Capital LP, along with its affiliates Commodore Capital Master LP, Michael Kramarz, and Robert Egen Atkinson, has reported a beneficial ownership of 3,544,101 shares of PepGen Inc. common stock as of March 4, 2026. This represents a 5.1% ownership stake in the company. The filing indicates that Commodore Capital LP acts as the investment manager for Commodore Capital Master LP, with Michael Kramarz and Robert Egen Atkinson, as managing partners, exercising investment discretion over these securities. The total number of outstanding shares of PepGen Inc. common stock was reported as 69,115,292 as of February 26, 2026. This Schedule 13G filing confirms that the securities were not acquired or held for the purpose of influencing the control of the issuer.