---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-205011"
form_type: "8-K"
ticker: "RGEN"
cik: "0000730272"
company_name: "REPLIGEN CORP"
filed_at: "2026-05-05T23:59:59+00:00"
generated_at: "2026-05-14T23:38:19.020413+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Repligen Q1 revenue $194M (+11% organic); raises adjusted EPS guidance to $1.97-$2.05

## Summary
- Q1 revenue $194M, +15% reported/+11% organic; GAAP EPS $0.15, adjusted EPS $0.48 (+23% YoY).
- Adjusted operating margin expanded 160bps to 15.4%; gross margin improved to 55.5% (adj.).
- FY2026 guidance: revenue $803M-$833M (9-13% organic growth); adj. EPS raised to $1.97-$2.05.
- Divested non-core Polymem filtration business (Mar 30); signed China OEM partnership in April.
- Transformation Office launched to drive margin expansion, site rationalization, IT/AI investments.

## SEC filing metadata
- accession: 0001193125-26-205011
- form_type: 8-K
- ticker: RGEN
- cik: 0000730272
- company_name: REPLIGEN CORP
- filed_at: 2026-05-05T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/730272/000119312526205011/0001193125-26-205011-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/730272/000119312526205011/rgen-20260505.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-205011
- JSON: https://secwatch.observer/filing/0001193125-26-205011.json
- Plain text: https://secwatch.observer/filing/0001193125-26-205011.txt

## Key facts
- Earnings Releases
  REPLIGEN CORP reported first quarter ended March 31, 2026 results: revenue $194 million, EPS $0.15. Guidance reaffirmed.
  - Period: first quarter ended March 31, 2026
  - Revenue: $194 million
  - EPS: $0.15
  - Guidance: reaffirmed
  - Result: reported results
  source text: #1, Suite 100 Waltham, Massachusetts 02453 Repligen Reports First Quarter 2026 Financial Results and Updates Full Year 2026 Financial Guidance • First quarter revenue of $194 million, a year-over-year increase of 15% as reported and 11% organic • GAAP EPS increased 50% year-over-year and adjusted EPS increased 23% year-over-year • Reiterating FY26 organic
  evidence_url: https://www.sec.gov/Archives/edgar/data/730272/000119312526205011/0001193125-26-205011-index.htm

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