{"schema_version":"secwatch.filing_event.v1","accession":"0001534969-23-000053","form_type":"8-K","ticker":"SERA","cik":"0001534969","company_name":"SERA PROGNOSTICS, INC.","filed_at":"2023-05-16T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.309919+00:00","generated_at":"2026-06-14T23:38:59.836550+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Sera Prognostics CEO Greg Critchfield to retire June 8; Zhenya Lindgardt named interim CEO","bullets":["CEO Gregory Critchfield retires after 12 years, effective June 8, 2023; remains on board.","Board member Zhenya Lindgardt appointed Interim CEO; Kim Kamdar named Board Chair.","Critchfield led company from inception through PreTRM test launch; Lindgardt has experience at Uber and BCG."],"urls":{"canonical":"https://secwatch.observer/filing/0001534969-23-000053","json":"https://secwatch.observer/filing/0001534969-23-000053.json","markdown":"https://secwatch.observer/filing/0001534969-23-000053.md","text":"https://secwatch.observer/filing/0001534969-23-000053.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1534969/000153496923000053/0001534969-23-000053-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1534969/000153496923000053/sera-20230514.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-14T23:38:59.836550+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":"084543da23","claim":"Gregory C. Critchfield departed as President and Chief Executive Officer at SERA PROGNOSTICS, INC..","evidence_excerpt":"On May 14, 2023, Gregory C. Critchfield, M.D., M. S. notified Sera Prognostics, Inc. (the “ Company ”) of his intention to retire from the position of President and Chief Executive Officer of the Company and Chairman of the Board of Directors (the “ Board ”), effective as of June 8, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1534969/000153496923000053/0001534969-23-000053-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retire"},{"label":"Role","value":"President and Chief Executive Officer"}],"fact_type":"executive_change"},{"claim_id":"141440bb42","claim":"Kim Kamdar was appointed as Chairperson of the Board at SERA PROGNOSTICS, INC..","evidence_excerpt":"Kim Kamdar, Ph.D., a member of the Board, has been appointed as Chairperson of the Board, effective as of the Retirement Date.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1534969/000153496923000053/0001534969-23-000053-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chairperson of the Board"}],"fact_type":"executive_change"},{"claim_id":"17ae845ac3","claim":"Zhenya Lindgardt was appointed as Interim Chief Executive Officer at SERA PROGNOSTICS, INC..","evidence_excerpt":"Concurrently with Dr. Critchfield’s retirement, Zhenya Lindgardt, a member of the Board, was appointed as the Interim Chief Executive Officer of the Company, effective June 8, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1534969/000153496923000053/0001534969-23-000053-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Interim Chief Executive Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}