As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of PepGen Inc. The largest reported stake is RA Capital Management, L.P.'s, at 29.2%. 8 filings are on record since August 13, 2025 (Schedule 13D/A, September 30, 2025).
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Key facts
- · Reporting person: Commodore Capital LP · Sole voting: 0 · Shared voting: 4,475,000 · Sole dispositive: 0 · Shared dispositive: 4,475,000 · SCHEDULE 13G/A, 2026-05-15
- · Reporting person: Viking Global Investors LP · Sole voting: 0 · Shared voting: 3,482,434 · Sole dispositive: 0 · Shared dispositive: 3,482,434 · SCHEDULE 13G/A, 2026-05-15
- · Holder: Commodore Capital LP · Percent: 5.1% · SCHEDULE 13G
- · Reporting person: Point72 Asset Management, L.P. · Sole voting: 0 · Shared voting: 2,067,432 · Sole dispositive: 0 · Shared dispositive: 2,067,432 · SCHEDULE 13G/A, 2025-11-14
- · Holder: Viking Global Investors LP · Percent: 5.1% · SCHEDULE 13G
PepGen Inc. has 8 Schedule 13D or 13G filings on record since 2025-08-13. 4 holders' latest filing reports 5% or more of common stock, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| RA Capital Management, L.P. | 29.2% | 20,099,753 | SCHEDULE 13D/A, 2025-09-30 | 2025-09-26 |
| Oxford Science Enterprises plc | 7.2% | 4,955,388 | SCHEDULE 13G/A, 2025-10-01 | 2025-09-30 |
| Commodore Capital LP | 6.5% | 4,475,000 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Viking Global Investors LP | 5.03% | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Point72 Asset Management, L.P. | 3% | 2,067,432 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Suvretta Capital Management, LLC | 0.9% | 300,000 | SCHEDULE 13G/A, 2025-08-13 | 2025-06-30 |
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More on PepGen Inc. and the records around it.
PepGen Inc. elsewhere on the record
Companies that share a holder
- Oxford Science Enterprises plc also filed stake reports on 1 other company: Barinthus Biotherapeutics plc. (Sep 2026)
- SUVRETTA CAPITAL MANAGEMENT, LLC also filed stake reports on 22 other companies: Veradermics, Inc (Aug 2026), Abeona Therapeutics Inc. (Aug 2026), Fulcrum Therapeutics, Inc. (Aug 2026)
- VIKING GLOBAL INVESTORS LP also filed stake reports on 27 other companies: City Therapeutics, Inc. (Oct 2026), MID AMERICA APARTMENT COMMUNITIES INC. (Oct 2026), REGAL REXNORD CORP (Sep 2026)
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What the Full Report on PepGen Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Commodore Capital LP | 0 | 4,475,000 | 0 | 4,475,000 | SCHEDULE 13G/A, 2026-05-15 |
| Commodore Capital Master LP | 0 | 4,475,000 | 0 | 4,475,000 | SCHEDULE 13G/A, 2026-05-15 |
| Robert Egen Atkinson | 0 | 4,475,000 | 0 | 4,475,000 | SCHEDULE 13G/A, 2026-05-15 |
| Michael Kramarz | 0 | 4,475,000 | 0 | 4,475,000 | SCHEDULE 13G/A, 2026-05-15 |
| Viking Global Investors LP | 0 | 3,482,434 | 0 | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 |
| Viking Global Opportunities Parent GP LLC | 0 | 3,482,434 | 0 | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 |
| Viking Global Opportunities GP LLC | 0 | 3,482,434 | 0 | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 |
| Viking Global Opportunities Portfolio GP LLC | 0 | 3,482,434 | 0 | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 |
| Viking Global Opportunities Illiquid Investments Sub-Master LP | 0 | 3,482,434 | 0 | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 |
| Kavra 16 LLC | 0 | 1,030,680 | 0 | 1,030,680 | SCHEDULE 13G/A, 2026-05-15 |
| Halvorsen Ole Andreas | 0 | 3,482,434 | 0 | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 |
| Shabet Rose Sharon | 0 | 3,482,434 | 0 | 3,482,434 | SCHEDULE 13G/A, 2026-05-15 |
| Point72 Asset Management, L.P. | 0 | 2,067,432 | 0 | 2,067,432 | SCHEDULE 13G/A, 2025-11-14 |
| Point72 Capital Advisors, Inc. | 0 | 2,067,432 | 0 | 2,067,432 | SCHEDULE 13G/A, 2025-11-14 |
| Steven A. Cohen | 0 | 2,067,432 | 0 | 2,067,432 | SCHEDULE 13G/A, 2025-11-14 |
The latest filing identifies PepGen Inc. by CUSIP 713317105 and gives its principal executive office as 321 Harrison Avenue, 8th Floor, Boston, MA 02118 (SCHEDULE 13G/A, 2026-05-15).
What the percentages are based on
The percentages set forth herein are based on 69,167,958 shares of Common Stock outstanding as of March 31, 2026, as reported in the Issuer's quarterly report on Form 10-Q, filed with the Securities and Exchange Commission (the "Commission") on May 12, 2026. VGI: 5.03% Opportunities Parent: 5.03% Opportunities GP: 5.03% Opportunities Portfolio GP: 5.03% VGOP: 5.03% KAVRA 16: 1.5% O. Andreas Halvorsen and Rose S.Viking Global Investors LP, SCHEDULE 13G/A, 2026-05-15
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-13 | Suvretta Capital Management, LLC | 0.9% | SCHEDULE 13G/A |
| 2025-09-30 | RA Capital Management, L.P. | 29.2% | SCHEDULE 13D/A |
| 2025-10-01 | Oxford Science Enterprises plc | 7.2% | SCHEDULE 13G/A |
| 2025-10-03 | Viking Global Investors LP | 5.1% | SCHEDULE 13G |
| 2025-11-14 | Point72 Asset Management, L.P. | 3% | SCHEDULE 13G/A |
| 2026-03-11 | Commodore Capital LP | 5.1% | SCHEDULE 13G |
| 2026-05-15 | Viking Global Investors LP | 5.03% | SCHEDULE 13G/A |
| 2026-05-15 | Commodore Capital LP | 6.5% | SCHEDULE 13G/A |
Questions about who owns PepGen Inc.
Who owns PepGen Inc.?
On this page, 4 holders' latest ownership filings report 5% or more of PepGen Inc.: RA Capital Management, L.P. (29.2%, Schedule 13D/A, filed 2025-09-30), Oxford Science Enterprises plc (7.2%, Schedule 13G/A, filed 2025-10-01), Commodore Capital LP (6.5%, Schedule 13G/A, filed 2026-05-15) and Viking Global Investors LP (5.03%, Schedule 13G/A, filed 2026-05-15).
Who are the largest shareholders of PepGen Inc.?
By the share each holder's latest filing reports, the largest holders of PepGen Inc. on this page are RA Capital Management, L.P. (29.2%), Oxford Science Enterprises plc (7.2%) and Commodore Capital LP (6.5%).
When did RA Capital Management, L.P. buy into PepGen Inc.?
The filings give report dates, not purchase dates. The earliest filing from RA Capital Management, L.P. on this page is the Schedule 13D/A, filed 2025-09-30, reporting 29.2%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 8 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.