---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-290319"
form_type: "8-K"
ticker: "RGEN"
cik: "0000730272"
company_name: "REPLIGEN CORP"
filed_at: "2023-12-07T23:59:59+00:00"
generated_at: "2026-06-07T16:36:39.825396+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Repligen issues $600M of 1% convertible notes due 2028, exchanges $217.7M of 2024 notes

## Summary
- Issues $600M aggregate 1.00% Convertible Senior Notes due 2028; $309.9M exchanged for $217.7M of 0.375% notes due 2024, $290.1M for cash.
- Conversion price ~$203.06 per share, representing ~30% premium over Dec 6 close of $156.20.
- Net cash proceeds from subscription ~$276.2M; $14.4M to repurchase common stock from certain note purchasers.
- Expects to close Dec 14; about $69.7M of 2024 notes remain outstanding.
- Notes are senior unsecured, convertible into cash/stock at company's election, redeemable after Dec 2026 under conditions.

## SEC filing metadata
- accession: 0001193125-23-290319
- form_type: 8-K
- ticker: RGEN
- cik: 0000730272
- company_name: REPLIGEN CORP
- filed_at: 2023-12-07T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 3.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/730272/000119312523290319/0001193125-23-290319-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/730272/000119312523290319/d618071d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-290319
- JSON: https://secwatch.observer/filing/0001193125-23-290319.json
- Plain text: https://secwatch.observer/filing/0001193125-23-290319.txt

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