{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-24-100902","form_type":"8-K","ticker":"SANA","cik":"0001770121","company_name":"Sana Biotechnology, Inc.","filed_at":"2024-04-18T23:59:59+00:00","discovered_at":"2026-05-14T18:03:19.986308+00:00","generated_at":"2026-06-03T19:13:57.722368+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"negative","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Sana Biotechnology R&D President Douglas Williams resigns effective April 18, 2024","bullets":["Douglas Williams, Ph.D., resigned as EVP and President, Research and Development.","Resignation effective April 18, 2024; voluntary for personal reasons.","No disagreement with the company cited; no successor named.","Williams' departure removes a key R&D leader in a biotech with no pipeline-stage products."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-100902","json":"https://secwatch.observer/filing/0001193125-24-100902.json","markdown":"https://secwatch.observer/filing/0001193125-24-100902.md","text":"https://secwatch.observer/filing/0001193125-24-100902.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1770121/000119312524100902/0001193125-24-100902-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1770121/000119312524100902/d823295d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-03T19:13:57.722368+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":"fae2396924","claim":"Douglas Williams resigned as Executive Vice President and President, Research and Development at Sana Biotechnology, Inc..","evidence_excerpt":"Effective April 18, 2024, Douglas Williams, Ph.D. resigned from his position as Executive Vice President and President, Research and Development of Sana Biotechnology, Inc. (the “Company”).","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1770121/000119312524100902/0001193125-24-100902-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Executive Vice President and President, Research and Development"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}