---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-062043"
form_type: "8-K"
ticker: "RGEN"
cik: "0000730272"
company_name: "REPLIGEN CORP"
filed_at: "2026-09-15T20:04:13+00:00"
generated_at: "2026-09-15T20:05:07.733051+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Repligen director Karen A. Dawes to retire from board effective Sept 30, 2026

## Summary
- Karen A. Dawes retiring from Repligen board after over 20 years of service, effective Sept 30, 2026.
- Retirement not due to disagreement with company operations, policies, or procedures.
- Dawes cites completed CEO transition and confidence in leadership team and future growth.

## SEC filing metadata
- accession: 0001628280-26-062043
- form_type: 8-K
- ticker: RGEN
- cik: 0000730272
- company_name: REPLIGEN CORP
- filed_at: 2026-09-15T20:04:13+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/730272/000162828026062043/0001628280-26-062043-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/730272/000162828026062043/rgen-20260910.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-062043
- JSON: https://secwatch.observer/filing/0001628280-26-062043.json
- Plain text: https://secwatch.observer/filing/0001628280-26-062043.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.