{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-013295","form_type":"8-K","ticker":"KALU","cik":"0000811596","company_name":"KAISER ALUMINUM CORP","filed_at":"2023-04-18T23:59:59+00:00","discovered_at":"2026-05-14T18:03:42.328782+00:00","generated_at":"2026-06-17T01:02:17.048302+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Kaiser Aluminum appoints Richard P. Grimley to board of directors","bullets":["Richard P. Grimley, 64, appointed on April 17, 2023, to fill a board vacancy.","Grimley brings experience from Ball Corp (SVP Global Ops 2016-2021) and Rexam.","He will serve as Class III director until 2024 annual meeting; on compensation and ESG committees.","USW agreed to treat Grimley as a Union Director under the director designation agreement."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-013295","json":"https://secwatch.observer/filing/0000950170-23-013295.json","markdown":"https://secwatch.observer/filing/0000950170-23-013295.md","text":"https://secwatch.observer/filing/0000950170-23-013295.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/811596/000095017023013295/0000950170-23-013295-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/811596/000095017023013295/kalu-20230417.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T01:02:17.048302+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":"e0df7a978a","claim":"Richard P. Grimley was appointed as director at KAISER ALUMINUM CORP.","evidence_excerpt":"On April 17, 2023, the board of directors (the “Board”) of Kaiser Aluminum Corporation (the “Company”) appointed Richard P. Grimley as a director to fill the vacancy on the Board.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/811596/000095017023013295/0000950170-23-013295-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"}