{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-25-037260","form_type":"8-K","ticker":"GERN","cik":"0000886744","company_name":"GERON CORP","filed_at":"2025-03-11T23:59:59+00:00","discovered_at":"2026-05-14T18:03:06.687236+00:00","generated_at":"2026-05-25T00:30:08.085053+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Geron CEO and Chairman John A. Scarlett departs; Dawn C. Bir named Interim CEO","bullets":["John A. Scarlett, M.D. concluded service as President, CEO and Chairman effective March 10, 2025; resigned from Board.","Scarlett remains employed through March 31, 2025 for transition; eligible for severance benefits per prior agreement.","Dawn C. Bir, current Board member since March 2019, appointed Interim President and CEO while permanent search underway.","Elizabeth G. O'Farrell, Lead Independent Director, appointed Chair of the Board effective March 10, 2025.","No compensatory arrangements established for Bir in connection with appointment; details to be filed if any."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-25-037260","json":"https://secwatch.observer/filing/0000950170-25-037260.json","markdown":"https://secwatch.observer/filing/0000950170-25-037260.md","text":"https://secwatch.observer/filing/0000950170-25-037260.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/886744/000095017025037260/0000950170-25-037260-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/886744/000095017025037260/gern-20250310.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-25T00:30:08.085053+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":[{"claim_id":"5a0ac9f158","claim":"Dawn C. Bir was appointed as Interim President and Chief Executive Officer at GERON CORP.","evidence_excerpt":"Also, effective March 10, 2025, Dawn C. Bir, a current member of the Board, was appointed as the Interim President and Chief Executive Officer of Geron to serve in such capacity while the Company conducts a search for a permanent Chief Executive Officer.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/886744/000095017025037260/0000950170-25-037260-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Interim President and Chief Executive Officer"}],"fact_type":"executive_change"},{"claim_id":"e089e7e846","claim":"Elizabeth G. O'Farrell was appointed as Chair of the Board at GERON CORP.","evidence_excerpt":"In addition, effective March 10, 2025, Ms. Elizabeth G. O'Farrell, currently the Lead Independent Director of the Board, was appointed Chair of the Board.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/886744/000095017025037260/0000950170-25-037260-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chair of the Board"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}