Repligen board member Karen Dawes to retire after over 20 years

Repligen Corporation disclosed in a Form 8-K dated September 10, 2026 that Karen A. Dawes notified the company that she will be retiring from the Repligen Board of Directors after over twenty years of service, effective as of September 30, 2026.¹

In a statement included in the filing, Dawes said it had been a privilege to serve on the board and contribute to the company's transformation, and that with a successful CEO transition complete, she believed the timing was right for her retirement.¹ She added that she was proud of what had been accomplished and left confident that Repligen is supported by an outstanding leadership team and board, and is well positioned for its next phase of growth.¹

The company stated that Dawes's decision to retire is not the result of any disagreement with Repligen over its operations, policies, or procedures.¹

The filing was signed on September 15, 2026 by Olivier Loeillot, President and Chief Executive Officer of Repligen Corporation.¹ The 8-K was filed under Item 5.02, covering departures of directors and officer appointments, and did not disclose a replacement for the board seat or additional governance changes beyond Dawes's retirement.