Ra Capital Management, L.P. - Sep 26, 2025 Form 4 Insider Report for PepGen Inc. (PEPG)

Role
Director, 10%+ Owner
Signature
/s/ Peter Kolchinsky, Manager of RA Capital Management, L.P.
Stock symbol
PEPG
Transactions as of
Sep 26, 2025
Transactions value $
$30,000,000
Form type
4
Date filed
9/30/2025, 04:35 PM
Previous filing
Sep 22, 2025
SEC
View on sec.gov

Reporting Owners (5)

Name Relationship Address Signature Signature date CIK
RA CAPITAL MANAGEMENT, L.P. Director, 10%+ Owner 200 BERKELEY STREET, 18TH FLOOR, BOSTON /s/ Peter Kolchinsky, Manager of RA Capital Management, L.P. 2025-09-30 0001346824
RA Capital Healthcare Fund LP Director, 10%+ Owner 200 BERKELEY STREET, 18TH FLOOR, BOSTON /s/ Peter Kolchinsky, Manager of RA Capital Healthcare Fund GP, LLC, the General Partner of RA Capital Healthcare Fund, L.P. 2025-09-30 0001315082
RA Capital Nexus Fund II, L.P. Director 200 BERKELEY STREET, 18TH FLOOR, BOSTON /s/ Peter Kolchinsky, Manager of RA Capital Nexus Fund II GP, LLC, the General Partner of RA Capital Nexus Fund II, L.P. 2025-09-30 0001825376
Kolchinsky Peter Director, 10%+ Owner C/O RA CAPITAL MANAGEMENT, L.P., 200 BERKELEY STREET, 18TH FLOOR, BOSTON /s/ Peter Kolchinsky, individually 2025-09-30 0001384859
Shah Rajeev M. Director, 10%+ Owner C/O RA CAPITAL MANAGEMENT, L.P., 200 BERKELEY STREET, 18TH FLOOR, BOSTON /s/ Rajeev Shah, individually 2025-09-30 0001619841

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction PEPG Common Stock Purchase $30M +9.38M +102.13% $3.20 18.6M Sep 26, 2025 See footnotes F1, F2
holding PEPG Common Stock 1.3M Sep 26, 2025 See footnotes F2, F3
holding PEPG Common Stock 208K Sep 26, 2025 See footnotes F2, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 These securities are held directly by RA Capital Healthcare Fund, L.P. (the "Fund").
F2 RA Capital Management, L.P. (the "Adviser") is the investment manager for the Fund, RA Capital Nexus Fund II, L.P. (the "Nexus Fund II"), and a separately managed account (the "Account"). The general partner of the Adviser is RA Capital Management GP, LLC (the "Adviser GP"), of which Dr. Peter Kolchinsky and Mr. Rajeev Shah are the managing members. The Adviser, the Adviser GP, the Fund, the Nexus Fund II, Dr. Kolchinsky, and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of its or his respective pecuniary interest therein.
F3 These securities are held directly by the Nexus Fund II.
F4 These securities are held directly by the Account.

Remarks:

Joshua Resnick, a Partner of the Adviser, serves on the Issuer's board of directors.