---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-165344"
form_type: "8-K"
ticker: "RGEN"
cik: "0000730272"
company_name: "REPLIGEN CORP"
filed_at: "2022-06-01T23:59:59+00:00"
generated_at: "2026-06-25T05:39:53.882524+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Repligen appoints Dr. Konstantin Konstantinov to board; all directors re-elected at annual meeting

## Summary
- Konstantinov elected to board effective May 26, 2022; brings 30 years of bioprocessing expertise from Genzyme and Bayer.
- Annual meeting results: all six director nominees elected with >94% support; Ernst & Young ratified as auditor; say-on-pay approved.
- Severance and change in control plan amended to adjust treatment of performance-based equity awards upon change in control.
- CEO Tony Hunt's employment agreement amended to align equity treatment with the amended severance plan.
- Director compensation policy amended for new non-employee director equity grants; new director granted initial option worth $170,000.

## SEC filing metadata
- accession: 0001193125-22-165344
- form_type: 8-K
- ticker: RGEN
- cik: 0000730272
- company_name: REPLIGEN CORP
- filed_at: 2022-06-01T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 5.07, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/730272/000119312522165344/0001193125-22-165344-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/730272/000119312522165344/d339987d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-165344
- JSON: https://secwatch.observer/filing/0001193125-22-165344.json
- Plain text: https://secwatch.observer/filing/0001193125-22-165344.txt

## Key facts
- Executive change
  Konstantin Konstantinov was elected as Director at REPLIGEN CORP.
  - Action: elected
  - Role: Director
  source text: the Board elected Konstantin Konstantinov, Ph.D. to the Board, effective May 26, 2022
  evidence_url: https://www.sec.gov/Archives/edgar/data/730272/000119312522165344/0001193125-22-165344-index.htm

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