{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-21-288697","form_type":"8-K/A","ticker":"LYEL","cik":"0001806952","company_name":"Lyell Immunopharma, Inc.","filed_at":"2021-10-01T23:59:59+00:00","discovered_at":"2026-05-14T18:04:14.227855+00:00","generated_at":"2026-06-29T00:03:51.401967+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.15,"calibrated_materiality_score":0.15,"confidence":"high","headline":"Lyell Immunopharma corrects Executive Chairman Klausner's resignation effective date to Oct 1, 2021","bullets":["Original 8-K had a typo; resignation date corrected to October 1, 2021.","Dr. Richard Klausner resigns as Executive Chairman and employee, effective October 1, 2021.","No other changes made to the original disclosure."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-21-288697","json":"https://secwatch.observer/filing/0001193125-21-288697.json","markdown":"https://secwatch.observer/filing/0001193125-21-288697.md","text":"https://secwatch.observer/filing/0001193125-21-288697.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1806952/000119312521288697/0001193125-21-288697-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1806952/000119312521288697/d239915d8ka.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T00:03:51.401967+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":"21059c699d","claim":"Richard Klausner resigned as Executive Chairman at Lyell Immunopharma, Inc..","evidence_excerpt":"On September 29, 2021, Dr. Klausner informed the Company that he will be resigning from his position as Executive Chairman of the Company and will no longer be an employee, effective October 1, 2021.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1806952/000119312521288697/0001193125-21-288697-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Executive Chairman"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}