{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-122184","form_type":"8-K","ticker":"ALEC","cik":"0001653087","company_name":"Alector, Inc.","filed_at":"2023-04-27T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.856217+00:00","generated_at":"2026-06-16T09:04:10.719160+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Director and Chairperson Tillman Gerngross to resign from Alector's board in June 2023","bullets":["Gerngross resigns as Board Chairperson effective June 13, 2023, and as director effective June 15, 2023.","Resignation is for personal reasons; no disagreement with Company's operations, policies, or practices.","No replacement named; Board will need to fill Chairperson and director vacancies."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-122184","json":"https://secwatch.observer/filing/0001193125-23-122184.json","markdown":"https://secwatch.observer/filing/0001193125-23-122184.md","text":"https://secwatch.observer/filing/0001193125-23-122184.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/0001193125-23-122184-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/d501864d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T09:04:10.719160+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":"9d4eab135e","claim":"Tillman Gerngross resigned as Chairperson at Alector, Inc..","evidence_excerpt":"On April 25, 2023, Tillman Gerngross, Ph.D. informed Alector, Inc. (the “Company”) of his resignation as Chairperson of the Company’s board of directors (the “Board”), effective June 13, 2023, and his resignation as a director of the Board, effective June 15, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/0001193125-23-122184-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chairperson"}],"fact_type":"executive_change"},{"claim_id":"9ddd54bde5","claim":"Tillman Gerngross resigned as Director at Alector, Inc..","evidence_excerpt":"On April 25, 2023, Tillman Gerngross, Ph.D. informed Alector, Inc. (the “Company”) of his resignation as Chairperson of the Company’s board of directors (the “Board”), effective June 13, 2023, and his resignation as a director of the Board, effective June 15, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1653087/000119312523122184/0001193125-23-122184-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}