X0508 4 2025-03-03 0001835597 PepGen Inc. PEPG 0001708063 STRECK PAUL C/O PEPGEN INC. 321 HARRISON AVE., 8TH FL BOSTON MA 02118 1 EVP, Head of R&D 0 Common Stock 2025-03-03 4 A 0 19430 0 A 19430 D Stock Option (Right to Buy) 2.81 2025-03-03 4 A 0 87000 0 A 2026-03-03 2035-03-02 Common Stock 87000 87000 D .Consists of shares of Common Stock issuable under 19,430 restricted stock units ("RSUs"). Each RSU represents the right to receive one share of Common Stock upon vesting. These RSUs are scheduled to vest in equal annual installments over four years with the first installment vesting on March 3, 2026, subject to the Reporting Person's continued service or employment with the Company on each applicable vesting date. This option shall vest as follows: twenty-five percent (25%) on the one-year anniversary of the Grant Date and the remainder vesting in thirty-six (36) equal monthly installments, subject to the Reporting Person's continued service or employment with the Company on each applicable vesting date. /s/ Mary Beth DeLena, as Attorney-in-Fact 2025-03-05