{"transactions":[{"id":855388,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-03-06T16:09:30.000Z","date":"2026-03-04","kind":"sale","planned":false,"acquired":false,"shares":131,"price":6.325,"value":828.575,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares automatically sold by the Company on behalf of the Reporting Person pursuant to a mandatory sell-to-cover provision in the award agreement required to cover minimum statutory tax withholding obligations that became due upon the vesting and settlement of restricted stock units (\"RSUs\"). The mandatory sale of the Reporting Person's shares was provided for in a RSU agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."}],"balance_after":296326,"source":{"system":"sec-edgar","filing":"0001835597-26-000012","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559726000012/form4.xml","form_type":"4"}},{"id":855387,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-03-06T16:09:30.000Z","date":"2026-03-04","kind":"sale","planned":false,"acquired":false,"shares":5144,"price":6.23,"value":32047.12,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares automatically sold by the Company on behalf of the Reporting Person pursuant to a mandatory sell-to-cover provision in the award agreement required to cover minimum statutory tax withholding obligations that became due upon the vesting and settlement of restricted stock units (\"RSUs\"). The mandatory sale of the Reporting Person's shares was provided for in a RSU agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."}],"balance_after":296457,"source":{"system":"sec-edgar","filing":"0001835597-26-000012","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559726000012/form4.xml","form_type":"4"}},{"id":873361,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-03-02T16:59:31.000Z","date":"2026-03-01","kind":"grant","planned":false,"acquired":true,"shares":731250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option shall vest and become exercisable as follows: 25% of the shares on the one-year anniversary of the Grant Date, with the remaining 75% vesting and becoming exercisable in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service to the Issuer on each such vesting date."}],"balance_after":731250,"derivative":{"exercise_price":6.22,"expiration_date":"2036-02-29","underlying":"Common Stock","underlying_shares":731250},"source":{"system":"sec-edgar","filing":"0001835597-26-000002","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559726000002/form4.xml","form_type":"4"}},{"id":873360,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-03-02T16:59:31.000Z","date":"2026-03-01","kind":"grant","planned":false,"acquired":true,"shares":187688,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of 187,688 restricted stock units (\"RSUs\"), each representing the contingent right to receive one share of Common Stock upon vesting. The RSUs vest in equal annual installments over four years, with the first installment vesting on March 1, 2027, subject to the Reporting Person's continued service to the Issuer on each such vesting date."}],"balance_after":301601,"source":{"system":"sec-edgar","filing":"0001835597-26-000002","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559726000002/form4.xml","form_type":"4"}},{"id":962792,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"grant","planned":false,"acquired":true,"shares":300000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"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 option recipient's continued service or employment with the Company on each applicable vesting date."}],"balance_after":300000,"derivative":{"exercise_price":4.53,"expiration_date":"2034-02-28","underlying":"Common Stock","underlying_shares":300000},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962791,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":300000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"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 option recipient's continued service or employment with the Company on each applicable vesting date."}],"balance_after":0,"derivative":{"exercise_price":16.62,"expiration_date":"2034-02-28","underlying":"Common Stock","underlying_shares":300000},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962790,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"grant","planned":false,"acquired":true,"shares":275000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"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 option recipient's continued service or employment with the Company on each applicable vesting date."}],"balance_after":275000,"derivative":{"exercise_price":4.53,"expiration_date":"2033-02-28","underlying":"Common Stock","underlying_shares":275000},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962789,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":275000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"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 option recipient's continued service or employment with the Company on each applicable vesting date."}],"balance_after":0,"derivative":{"exercise_price":15.25,"expiration_date":"2033-02-28","underlying":"Common Stock","underlying_shares":275000},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962788,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"grant","planned":false,"acquired":true,"shares":466095,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"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 option recipient's continued service or employment with the Company on each applicable vesting date."}],"balance_after":466095,"derivative":{"exercise_price":4.53,"expiration_date":"2032-05-05","underlying":"Common Stock","underlying_shares":466095},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962787,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":466095,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"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 option recipient's continued service or employment with the Company on each applicable vesting date."}],"balance_after":0,"derivative":{"exercise_price":12,"expiration_date":"2032-05-05","underlying":"Common Stock","underlying_shares":466095},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962786,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"grant","planned":false,"acquired":true,"shares":40815,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This stock option vests over four years following the vesting commencement date (March 7, 2022) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":40815,"derivative":{"exercise_price":4.53,"expiration_date":"2032-03-06","underlying":"Common Stock","underlying_shares":40815},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962785,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":40815,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This stock option vests over four years following the vesting commencement date (March 7, 2022) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":0,"derivative":{"exercise_price":11.23,"expiration_date":"2032-03-06","underlying":"Common Stock","underlying_shares":40815},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962784,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"grant","planned":false,"acquired":true,"shares":40815,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option vests over four years following the vesting commencement date (October 6, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":40815,"derivative":{"exercise_price":4.53,"expiration_date":"2031-09-05","underlying":"Common Stock","underlying_shares":40815},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962783,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":40815,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option vests over four years following the vesting commencement date (October 6, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":0,"derivative":{"exercise_price":8.96,"expiration_date":"2031-09-05","underlying":"Common Stock","underlying_shares":40815},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962782,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"grant","planned":false,"acquired":true,"shares":40815,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option vests over four years following the vesting commencement date (September 17, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":40815,"derivative":{"exercise_price":4.53,"expiration_date":"2031-09-05","underlying":"Common Stock","underlying_shares":40815},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962781,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":40815,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option vests over four years following the vesting commencement date (September 17, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":0,"derivative":{"exercise_price":8.96,"expiration_date":"2031-09-05","underlying":"Common Stock","underlying_shares":40815},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962780,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"grant","planned":false,"acquired":true,"shares":352705,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This stock option vests over four years following the vesting commencement date (September 6, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":352705,"derivative":{"exercise_price":4.53,"expiration_date":"2031-09-05","underlying":"Common Stock","underlying_shares":352705},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":962779,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-18T15:31:20.000Z","date":"2025-11-04","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":352705,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 4, 2025, the Issuer's Board of Directors approved a repricing of the Reporting Person's outstanding stock options granted under the Issuer's 2020 Stock Plan, 2022 Stock Option and Incentive Plan, and 2024 Inducement Plan. The exercise price of eligible options was reduced to $4.53, with all other terms unchanged except that the reduced exercise price is available only if the Reporting Person satisfies the applicable retention period; otherwise, the original exercise price will apply. The transactions reported herein are exempt pursuant to Rules 16b-6(d) and 16b-3 under the Securities Exchange Act of 1934."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This stock option vests over four years following the vesting commencement date (September 6, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":0,"derivative":{"exercise_price":8.96,"expiration_date":"2031-09-05","underlying":"Common Stock","underlying_shares":352705},"source":{"system":"sec-edgar","filing":"0001835597-25-000015","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000183559725000015/form4.xml","form_type":"4"}},{"id":1167617,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-04-22T07:01:12.000Z","date":"2025-04-17","kind":"purchase","planned":false,"acquired":true,"shares":10000,"price":1.355,"value":13550.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares of Common Stock purchased on the open market on April 17, 2025 at prices ranging from $1.335 to $1.36, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."}],"balance_after":113913,"source":{"system":"sec-edgar","filing":"0001127602-25-012400","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760225012400/form4.xml","form_type":"4"}},{"id":1174532,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-04-09T07:40:15.000Z","date":"2025-04-08","kind":"purchase","planned":false,"acquired":true,"shares":41500,"price":1.15,"value":47725.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares of Common Stock purchased on the open market on April 8, 2025 at prices ranging from $1.145 to $1.15, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."}],"balance_after":103913,"source":{"system":"sec-edgar","filing":"0001127602-25-011837","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760225011837/form4.xml","form_type":"4"}},{"id":1221413,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-03-05T17:21:13.000Z","date":"2025-03-03","kind":"grant","planned":false,"acquired":true,"shares":271875,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"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."}],"balance_after":271875,"derivative":{"exercise_price":2.81,"exercise_date":"2026-03-03","expiration_date":"2035-03-02","underlying":"Common Stock","underlying_shares":271875},"source":{"system":"sec-edgar","filing":"0001127602-25-008359","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760225008359/form4.xml","form_type":"4"}},{"id":1221412,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-03-05T17:21:13.000Z","date":"2025-03-03","kind":"grant","planned":false,"acquired":true,"shares":60719,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of shares of Common Stock issuable under 60,719 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes of 60,719 shares of unvested RSUs."}],"balance_after":62413,"source":{"system":"sec-edgar","filing":"0001127602-25-008359","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760225008359/form4.xml","form_type":"4"}},{"id":1605839,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2024-03-01T17:38:36.000Z","date":"2024-03-01","kind":"grant","planned":false,"acquired":true,"shares":300000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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 option recipient's continued service or employment with the Company on each applicable vesting date."}],"balance_after":300000,"derivative":{"exercise_price":16.62,"exercise_date":"2025-03-01","expiration_date":"2034-02-28","underlying":"Common Stock","underlying_shares":300000},"source":{"system":"sec-edgar","filing":"0001127602-24-007956","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760224007956/form4.xml","form_type":"4"}},{"id":1720957,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-12-05T07:34:15.000Z","date":"2023-11-30","kind":"purchase","planned":false,"acquired":true,"shares":1694,"price":4.165,"value":7055.51,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares of Common Stock purchased pursuant to the PepGen Inc. 2022 Employee Stock Purchase Plan (\"ESPP\"), for the purchase period of June 1, 2023 to November 30, 2023. In accordance with the ESPP, these shares were purchased at a price equal to 85% of the closing price of PepGen's Common Stock on November 30, 2023."}],"balance_after":1694,"source":{"system":"sec-edgar","filing":"0001127602-23-028801","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760223028801/form4.xml","form_type":"4"}},{"id":1859946,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-06-09T19:06:53.000Z","date":"2023-06-08","kind":"exercise","planned":true,"acquired":false,"shares":2381,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option vests over four years following the vesting commencement date (January 21, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":325054,"derivative":{"exercise_price":2.71,"expiration_date":"2031-03-21","underlying":"Common Stock","underlying_shares":2381},"source":{"system":"sec-edgar","filing":"0001127602-23-018472","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760223018472/form4.xml","form_type":"4"}},{"id":1859945,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-06-09T19:06:53.000Z","date":"2023-06-08","kind":"sale","planned":true,"acquired":false,"shares":2381,"price":16.0386,"value":38187.9066,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2022."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.00 to $16.10, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001127602-23-018472","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760223018472/form4.xml","form_type":"4"}},{"id":1859944,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common 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the reporting person on December 8, 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option vests over four years following the vesting commencement date (January 21, 2021) with 25% of such shares vesting on the first anniversary of the vesting commencement date, and the remaining shares vesting in 36 equal monthly installments, subject to continued service through each vesting date."}],"balance_after":335854,"derivative":{"exercise_price":2.71,"expiration_date":"2031-03-21","underlying":"Common Stock","underlying_shares":18150},"source":{"system":"sec-edgar","filing":"0001127602-23-018351","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760223018351/form4.xml","form_type":"4"}},{"id":1861695,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James 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These shares were sold in multiple transactions at prices ranging from $16.00 to $16.61, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001127602-23-018351","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760223018351/form4.xml","form_type":"4"}},{"id":1861694,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-06-08T17:23:56.000Z","date":"2023-06-07","kind":"exercise","planned":true,"acquired":true,"shares":8419,"price":2.71,"value":22815.49,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2022."}],"balance_after":8419,"source":{"system":"sec-edgar","filing":"0001127602-23-018351","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1763307/000112760223018351/form4.xml","form_type":"4"}},{"id":1861693,"issuer":{"id":6253,"kind":"organization","name":"PepGen Inc."},"owners":[{"id":62212,"kind":"person","name":"McArthur James G","position":1,"cik":"0001763307","reported_name":"McArthur James G","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-06-08T17:23:56.000Z","date":"2023-06-06","kind":"sale","planned":true,"acquired":false,"shares":18150,"price":16.1796,"value":293659.74,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2022."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.00 to $16.43, inclusive. 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