{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-205020","form_type":"8-K","ticker":"LYEL","cik":"0001806952","company_name":"Lyell Immunopharma, Inc.","filed_at":"2025-09-16T23:59:59+00:00","discovered_at":"2026-05-14T18:02:45.060784+00:00","generated_at":"2026-05-17T06:31:13.039504+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"negative","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Lyell Immunopharma CFO Charles Newton resigns effective Oct 31, 2025","bullets":["Charles Newton resigns as CFO and principal financial/accounting officer, effective October 31, 2025.","No disagreements cited; Newton may provide consulting services through April 30, 2026.","Company plans to conduct a search for a new CFO; no replacement named yet."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-205020","json":"https://secwatch.observer/filing/0001193125-25-205020.json","markdown":"https://secwatch.observer/filing/0001193125-25-205020.md","text":"https://secwatch.observer/filing/0001193125-25-205020.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1806952/000119312525205020/0001193125-25-205020-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1806952/000119312525205020/d948282d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T06:31:13.039504+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"}