As of November 6, 2026, Repligen Corp has reported one leadership change filing to the SEC under Item 5.02 of Form 8-K, on September 15, 2026 (Form 8-K, September 15, 2026).
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Repligen Corp reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-09-15. Every row below is cited to the filing it comes from, and this page adds each new change as Repligen Corp files it.
Also on the record for Repligen Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 7, 2026 | Stake report, Schedule 13G/A, by FMR LLC | 13% of the class | 5%+ stakes | Source |
| August 14, 2026 | Stake report, Schedule 13G/A, by T. Rowe Price Associates, Inc. | 3.1% of the class | 5%+ stakes | Source |
| July 31, 2026 | Stake report, Schedule 13G, by Vanguard Capital Management | 5% of the class | 5%+ stakes | Source |
| March 27, 2026 | Stake report, Schedule 13G/A, by The Vanguard Group | — | 5%+ stakes | Source |
| February 17, 2026 | Stake report, Schedule 13G/A, by T. Rowe Price Associates, Inc. | 8.2% of the class | 5%+ stakes | Source |
| February 13, 2026 | Stake report, Schedule 13G/A, by Roy T. Eddleman Living Trust | 4.81% of the class | 5%+ stakes | Source |
| February 5, 2026 | Stake report, Schedule 13G, by FMR LLC | 5.1% of the class | 5%+ stakes | Source |
| September 8, 2025 | Stake report, Schedule 13G/A, by T. Rowe Price Associates, Inc. | 6.1% of the class | 5%+ stakes | Source |
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More on Repligen Corp and the records around it.
Repligen Corp elsewhere on the record
Companies that share a holder
- T. Rowe Price Associates, Inc. also filed stake reports on 191 other companies: PACIFIC BIOSCIENCES OF CALIF (Nov 2026), APARTMENT INVT & MGMT CO -A (Oct 2026), BETA BIONICS INC (Oct 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-09-15 | Reported | not named in the filing | 8-K, 2026-09-15 |
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Reported
With a successful CEO transition complete, I believe now is the right time for my retirement.
- On September 10, 2026, Karen A. Dawes notified Repligen Corporation ("Repligen") that she will be retiring from the Repligen Board of Directors (the "Board") after over twenty years of distinguished service to Repligen, effective as of September 30, 2026.
- Ms. Dawes commented, "It has been a privilege and an honor to serve on Repligen's Board and to contribute to the Company's transformation over the years.
- I am proud of what we have accomplished together and leave knowing Repligen is supported by an outstanding leadership team and Board.
- I am confident the Company is well-positioned for continued success and its next phase of growth." Ms. Dawes's decision to retire from the Board is not the result of any disagreement with Repligen with respect to Repligen's operations, policies or procedures.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.