{"schema_version":"secwatch.filing_event.v1","accession":"0001564590-21-047215","form_type":"8-K","ticker":"KALU","cik":"0000811596","company_name":"KAISER ALUMINUM CORP","filed_at":"2021-09-07T23:59:59+00:00","discovered_at":"2026-05-14T18:04:20.822077+00:00","generated_at":"2026-06-29T05:40:23.848590+00:00","sec_items":["1.01","5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Kaiser Aluminum adds two directors, amends board size and USW nomination rights","bullets":["Appointed Michael C. Arnold (retired Ryerson CEO) and Kevin W. Williams (GAA Manufacturing CEO) to board, increasing size to 13.","Amended USW director designation agreement: board may have up to 13 members without increasing USW nominee count.","If board not reduced to 12 by 2024 annual meeting, USW nomination right increases to 5 candidates until reduction.","Arnold to serve on compensation committee; Williams on audit committee; both receive standard non-employee director compensation."],"urls":{"canonical":"https://secwatch.observer/filing/0001564590-21-047215","json":"https://secwatch.observer/filing/0001564590-21-047215.json","markdown":"https://secwatch.observer/filing/0001564590-21-047215.md","text":"https://secwatch.observer/filing/0001564590-21-047215.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/811596/000156459021047215/0001564590-21-047215-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/811596/000156459021047215/kalu-8k_20210903.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-29T05:40:23.848590+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":"56ba3a1024","claim":"Kevin W. Williams was appointed as Director at KAISER ALUMINUM CORP.","evidence_excerpt":"The Board appointed Mr. Williams as a director because of his extensive manufacturing, automotive and supplier quality and development expertise as well as experience in labor relations.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/811596/000156459021047215/0001564590-21-047215-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"6a7ce6735f","claim":"Michael C. Arnold was appointed as Director at KAISER ALUMINUM CORP.","evidence_excerpt":"The Board appointed Mr. Arnold as a director because of his extensive manufacturing and distribution expertise in metals industries and public company board experience, as well as his mergers and acquisition and supply chain experience in metals industries.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/811596/000156459021047215/0001564590-21-047215-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"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"}