{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-25-100340","form_type":"8-K","ticker":"KALU","cik":"0000811596","company_name":"KAISER ALUMINUM CORP","filed_at":"2025-07-30T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.427267+00:00","generated_at":"2026-05-17T23:21:18.927254+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Director Kevin W. Williams resigns from Kaiser Aluminum board","bullets":["Kevin W. Williams notified board of resignation effective August 1, 2025.","Resignation not due to any disagreement with company operations, policies, or practices.","Board plans to fill vacancy focusing on candidates with critical skills for strategy and succession."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-25-100340","json":"https://secwatch.observer/filing/0000950170-25-100340.json","markdown":"https://secwatch.observer/filing/0000950170-25-100340.md","text":"https://secwatch.observer/filing/0000950170-25-100340.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/811596/000095017025100340/0000950170-25-100340-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/811596/000095017025100340/kalu-20250730.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T23:21:18.927254+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"}