---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-161728"
form_type: "8-K"
ticker: "RGEN"
cik: "0000730272"
company_name: "REPLIGEN CORP"
filed_at: "2024-06-14T23:59:59+00:00"
generated_at: "2026-06-01T04:28:42.505581+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Repligen appoints Olivier Loeillot as CEO effective Sept 1, 2024; Hunt becomes Executive Chair

## Summary
- Loeillot receives $750K base salary, 85% target bonus, and a $5M equity award (50% RSUs, 25% options, 25% PSUs).
- Hunt to serve as Executive Chair through March 2026, then advisor to March 2027; base salary $440K, 52.5% bonus.
- Severance: Loeillot gets 1.5x salary for termination without cause; 2.0x salary plus bonus for change-in-control.
- Karen Dawes appointed Lead Independent Director, effective Sept 1, 2024; Board composition otherwise unchanged.
- Loeillot elected to the Board effective on the transition date.

## SEC filing metadata
- accession: 0001193125-24-161728
- form_type: 8-K
- ticker: RGEN
- cik: 0000730272
- company_name: REPLIGEN CORP
- filed_at: 2024-06-14T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/730272/000119312524161728/0001193125-24-161728-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/730272/000119312524161728/d844408d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-161728
- JSON: https://secwatch.observer/filing/0001193125-24-161728.json
- Plain text: https://secwatch.observer/filing/0001193125-24-161728.txt

## Key facts
- Executive change
  Tony J. Hunt changed role as Executive Chair at REPLIGEN CORP.
  - Action: will serve as
  - Role: Executive Chair
  source text: Tony J. Hunt, who will serve as Executive Chair of the Repligen board of directors
  evidence_url: https://www.sec.gov/Archives/edgar/data/730272/000119312524161728/0001193125-24-161728-index.htm
- Executive change
  Olivier Loeillot was appointed as President and Chief Executive Officer at REPLIGEN CORP.
  - Action: appointed
  - Role: President and Chief Executive Officer
  source text: Repligen has appointed Olivier Loeillot, Repligen’s President and Chief Commercial Officer, to the role of President and Chief Executive Officer, as successor to Tony J. Hunt, who will serve as Executive Chair of the Repligen board of directors (the “Board”), with such transition to be effective September 1, 2024
  evidence_url: https://www.sec.gov/Archives/edgar/data/730272/000119312524161728/0001193125-24-161728-index.htm
- Executive change
  Karen A. Dawes was appointed as Lead Independent Director at REPLIGEN CORP.
  - Action: appointed
  - Role: Lead Independent Director
  source text: appointed Karen A. Dawes, the Board’s current Chair, to the role of Lead Independent Director
  evidence_url: https://www.sec.gov/Archives/edgar/data/730272/000119312524161728/0001193125-24-161728-index.htm
- Executive change
  Olivier Loeillot was elected as Member of the Board at REPLIGEN CORP.
  - Action: elected
  - Role: Member of the Board
  source text: the Board elected Mr. Loeillot as a member of the Board
  evidence_url: https://www.sec.gov/Archives/edgar/data/730272/000119312524161728/0001193125-24-161728-index.htm

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