Commodore Capital LP Reports 6.5% Stake in PepGen Inc. (PEPG) via Schedule 13G/A

Commodore Capital LP, along with Commodore Capital Master LP and managing partners Robert Egen Atkinson and Michael Kramarz, filed a Schedule 13G/A on May 15, 2026, disclosing a significant stake in PepGen Inc. (PEPG). The filing reports beneficial ownership of 4,475,000 shares of common stock, representing 6.5% of the shares outstanding as of March 31, 2026. This represents an increase from a previously reported 0% ownership position, indicating a new major holding by the investment firm. Commodore Capital LP serves as the investment manager to Commodore Capital Master LP, with Atkinson and Kramarz exercising shared investment discretion over the reported securities. The filing indicates that the shares were acquired in the ordinary course of business and not for the purpose of changing or influencing the control of the issuer. The ownership percentage is based on 69,167,958 shares of Common Stock reported as outstanding in PepGen's Quarterly Report filed on May 12, 2026.