{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-003467","form_type":"8-K","ticker":"RGEN","cik":"0000730272","company_name":"REPLIGEN CORP","filed_at":"2026-01-06T23:59:59+00:00","discovered_at":"2026-05-14T18:02:37.605736+00:00","generated_at":"2026-05-16T11:35:35.226317+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Repligen elects Martin D. Madaus as Chair, succeeding Tony Hunt effective Mar 13, 2026","bullets":["Tony Hunt retires as Executive Chair and Board member effective March 13, 2026; will serve as advisor through March 2027.","Dr. Martin D. Madaus, a director since February 2023, elected as Chair of the Board effective March 13, 2026.","Madaus brings 36 years of bioprocessing industry experience; formerly Chairman, President and CEO of Millipore.","The succession was previously disclosed in Repligen's June 14, 2024 8-K filing."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-003467","json":"https://secwatch.observer/filing/0001193125-26-003467.json","markdown":"https://secwatch.observer/filing/0001193125-26-003467.md","text":"https://secwatch.observer/filing/0001193125-26-003467.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/730272/000119312526003467/0001193125-26-003467-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/730272/000119312526003467/rgen-20260106.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T11:35:35.226317+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}