8-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

PepGen Inc.

(Exact name of Registrant as Specified in Its Charter)

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.07 Submission of Matters to a Vote of Security Holders.

The 2025 Annual Meeting of Stockholders (the “2025 Annual Meeting”) of PepGen Inc. (the “Company”) was held on June 4, 2025. The proposals set forth below were submitted to the stockholders at the 2025 Annual Meeting, with each such proposal described in the Company’s definitive proxy statement filed with the Securities and Exchange Commission on April 25, 2025 in connection with the 2025 Annual Meeting.

The number of shares of common stock entitled to vote at the 2025 Annual Meeting was 32,720,943. The number of shares of common stock present or represented by valid proxy at the 2025 Annual Meeting was 29,425,676. Therefore, a quorum was present. The number of votes cast for and withheld/against and the number of abstentions and broker non-votes with respect to each proposal voted upon are set forth below.

Proposal 1 - Election of Directors

The Company’s stockholders elected the three Class III directors to the Company’s board of directors, to serve until the 2028 annual meeting of stockholders and until his or her successor has been duly elected and qualified, or until his or her earlier death, resignation or removal.

There were 2,082,233 broker non-votes regarding the election of each of Mitchell H. Finer, Heidi Henson and Laurie B. Keating.

Proposal 2 - Ratification of Appointment of Independent Registered Accounting Firm

The Company’s stockholders ratified the appointment of KPMG LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025.

There were zero broker non-votes regarding this proposal.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.