{"cik":811596,"company":{"entity_status":null,"filings":[{"accession":"0001193125-26-354093","document":"kalu-20260812.htm","filed":"2026-08-17","form":"8-K","items":"5.02,7.01,9.01","report_date":"2026-08-12"},{"accession":"0001193125-26-314580","document":"kalu-20260630.htm","filed":"2026-07-23","form":"10-Q","items":"","report_date":"2026-06-30"},{"accession":"0001193125-26-312472","document":"kalu-20260722.htm","filed":"2026-07-22","form":"8-K","items":"2.02,9.01","report_date":"2026-07-22"},{"accession":"0001193125-26-302091","document":"kalu-20260713.htm","filed":"2026-07-13","form":"8-K","items":"8.01,9.01","report_date":"2026-07-13"},{"accession":"0001193125-26-260114","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-260101","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-260063","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-260058","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-260055","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-260047","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-259941","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-259940","document":"xslF345X06/ownership.xml","filed":"2026-06-05","form":"4","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-257524","document":"kalu-20260604.htm","filed":"2026-06-04","form":"8-K","items":"5.02,5.07,9.01","report_date":"2026-06-04"},{"accession":"0001193125-26-187425","document":"kalu-20260428.htm","filed":"2026-04-28","form":"DEF 14A","items":"","report_date":"2026-06-04"},{"accession":"0001193125-26-173882","document":"kalu-20260331.htm","filed":"2026-04-23","form":"10-Q","items":"","report_date":"2026-03-31"},{"accession":"0001193125-26-170615","document":"kalu-20260422.htm","filed":"2026-04-22","form":"8-K","items":"2.02,9.01","report_date":"2026-04-22"},{"accession":"0001193125-26-152982","document":"kalu-20260413.htm","filed":"2026-04-13","form":"8-K","items":"8.01,9.01","report_date":"2026-04-13"},{"accession":"0001193125-26-059575","document":"kalu-20251231.htm","filed":"2026-02-19","form":"10-K","items":"","report_date":"2025-12-31"},{"accession":"0001193125-26-057221","document":"kalu-20260218.htm","filed":"2026-02-18","form":"8-K","items":"2.02,9.01","report_date":"2026-02-18"},{"accession":"0001193125-26-011824","document":"kalu-20260113.htm","filed":"2026-01-13","form":"8-K","items":"8.01,9.01","report_date":"2026-01-13"},{"accession":"0001193125-26-006395","document":"kalu-20260101.htm","filed":"2026-01-07","form":"8-K","items":"5.02,9.01","report_date":"2026-01-01"},{"accession":"0001193125-25-325321","document":"kalu-20251218.htm","filed":"2025-12-19","form":"8-K","items":"8.01,9.01","report_date":"2025-12-18"},{"accession":"0001193125-25-284711","document":"kalu-20251114.htm","filed":"2025-11-17","form":"8-K","items":"5.02,9.01","report_date":"2025-11-14"},{"accession":"0001193125-25-267154","document":"d78226d8k.htm","filed":"2025-11-05","form":"8-K","items":"1.01,2.03,9.01","report_date":"2025-11-05"},{"accession":"0001193125-25-251791","document":"d68116d8k.htm","filed":"2025-10-27","form":"8-K","items":"8.01,9.01","report_date":"2025-10-27"},{"accession":"0001193125-25-250703","document":"d33626d8k.htm","filed":"2025-10-27","form":"8-K","items":"8.01,9.01","report_date":"2025-10-27"},{"accession":"0001193125-25-248835","document":"kalu-20250930.htm","filed":"2025-10-23","form":"10-Q","items":"","report_date":"2025-09-30"},{"accession":"0001193125-25-246940","document":"kalu-20251022.htm","filed":"2025-10-22","form":"8-K","items":"2.02,9.01","report_date":"2025-10-22"},{"accession":"0001193125-25-241481","document":"d33098d8k.htm","filed":"2025-10-16","form":"8-K","items":"1.01,2.03,9.01","report_date":"2025-10-14"},{"accession":"0001193125-25-239170","document":"kalu-20251014.htm","filed":"2025-10-14","form":"8-K","items":"8.01,9.01","report_date":"2025-10-14"},{"accession":"0001193125-25-209051","document":"kalu-20250918.htm","filed":"2025-09-19","form":"8-K","items":"5.02,9.01","report_date":"2025-09-18"},{"accession":"0000950170-25-100340","document":"kalu-20250730.htm","filed":"2025-07-30","form":"8-K","items":"5.02","report_date":"2025-07-30"},{"accession":"0000950170-25-098410","document":"kalu-20250630.htm","filed":"2025-07-24","form":"10-Q","items":"","report_date":"2025-06-30"},{"accession":"0000950170-25-097936","document":"kalu-20250723.htm","filed":"2025-07-23","form":"8-K","items":"2.02,9.01","report_date":"2025-07-23"},{"accession":"0000950170-25-095905","document":"kalu-20250715.htm","filed":"2025-07-15","form":"8-K","items":"8.01,9.01","report_date":"2025-07-15"},{"accession":"0000950170-25-084391","document":"kalu-20250610.htm","filed":"2025-06-10","form":"8-K","items":"5.02,5.07,9.01","report_date":"2025-06-10"},{"accession":"0000950170-25-059349","document":"kalu-20250428.htm","filed":"2025-04-28","form":"DEF 14A","items":"","report_date":"2025-06-10"},{"accession":"0000950170-25-058170","document":"kalu-20250331.htm","filed":"2025-04-24","form":"10-Q","items":"","report_date":"2025-03-31"},{"accession":"0000950170-25-057478","document":"kalu-20250423.htm","filed":"2025-04-23","form":"8-K","items":"2.02,9.01","report_date":"2025-04-23"},{"accession":"0000950170-25-054297","document":"kalu-20250415.htm","filed":"2025-04-15","form":"8-K","items":"8.01,9.01","report_date":"2025-04-15"}],"former_names":[],"gleif_parents":[],"headquarters":[{"latitude":35.929166666667,"longitude":-86.8575,"name":"Franklin","precision":"headquarters locality","source":"wikidata","url":"https://www.wikidata.org/wiki/Q984264"}],"insiders":[{"accession":"0001193125-26-260114","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"11445.0","form":"4","owners":["arnold michael c"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-260101","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"3466.0","form":"4","owners":["Glas Kimberly Thompson"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-260063","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"15407.0","form":"4","owners":["STEBBINS DONALD J"],"plan_10b5_1":false,"price":"178.1","security":"Common Stock, par value $0.01 per share","shares":"631.0"},{"accession":"0001193125-26-260063","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"14776.0","form":"4","owners":["STEBBINS DONALD J"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-260058","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"2691.0","form":"4","owners":["Wilcox Brett"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-260058","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"3019.0","form":"4","owners":["Wilcox Brett"],"plan_10b5_1":false,"price":"178.1","security":"Common Stock, par value $0.01 per share","shares":"328.0"},{"accession":"0001193125-26-260055","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"3171.0","form":"4","owners":["HOFFMAN JAMES DONALD"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-260055","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"3760.0","form":"4","owners":["HOFFMAN JAMES DONALD"],"plan_10b5_1":false,"price":"178.1","security":"Common Stock, par value $0.01 per share","shares":"589.0"},{"accession":"0001193125-26-260047","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"5364.0","form":"4","owners":["Grimley Richard P."],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-259941","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"4181.0","form":"4","owners":["MINOR GLENDA J"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-259941","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"4516.0","form":"4","owners":["MINOR GLENDA J"],"plan_10b5_1":false,"price":"178.1","security":"Common Stock, par value $0.01 per share","shares":"335.0"},{"accession":"0001193125-26-259940","acquired_disposed":"A","code":"A","date":"2026-06-04","derivative":false,"filed":"2026-06-05","following_shares":"24332.0","form":"4","owners":["Foster David A"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"786.0"},{"accession":"0001193125-26-201607","acquired_disposed":"D","code":"S","date":"2026-04-29","derivative":false,"filed":"2026-05-01","following_shares":"4578.0","form":"4","owners":["Grimley Richard P."],"plan_10b5_1":false,"price":"171.52","security":"Common Stock, par value $0.01 per share","shares":"1524.0"},{"accession":"0001193125-26-201545","acquired_disposed":"D","code":"S","date":"2026-04-29","derivative":false,"filed":"2026-05-01","following_shares":"94308.0","form":"4","owners":["Harvey Keith"],"plan_10b5_1":false,"price":"173.13","security":"Common Stock, par value $0.01 per share","shares":"3031.0"},{"accession":"0001193125-26-191904","acquired_disposed":"D","code":"G","date":"2026-04-28","derivative":false,"filed":"2026-04-29","following_shares":"28200.0","form":"4","owners":["DONNAN JOHN MALCOLM"],"plan_10b5_1":false,"price":"0.0","security":"Common Stock, par value $0.01 per share","shares":"1500.0"},{"accession":"0001193125-26-191901","acquired_disposed":"D","code":"S","date":"2026-04-28","derivative":false,"filed":"2026-04-29","following_shares":"19091.0","form":"4","owners":["West Neal E"],"plan_10b5_1":false,"price":"173.29","security":"Common Stock, par value $0.01 per share","shares":"5000.0"},{"accession":"0001193125-26-191905","acquired_disposed":"D","code":"S","date":"2026-04-27","derivative":false,"filed":"2026-04-29","following_shares":"9887.0","form":"4","owners":["Wilcox Brett"],"plan_10b5_1":false,"price":"174.44","security":"Common Stock, par value $0.01 per share","shares":"15000.0"},{"accession":"0001193125-26-191904","acquired_disposed":"D","code":"S","date":"2026-04-27","derivative":false,"filed":"2026-04-29","following_shares":"29700.0","form":"4","owners":["DONNAN JOHN MALCOLM"],"plan_10b5_1":false,"price":"178.2","security":"Common Stock, par value $0.01 per share","shares":"2743.0"},{"accession":"0001193125-26-191902","acquired_disposed":"D","code":"S","date":"2026-04-27","derivative":false,"filed":"2026-04-29","following_shares":"4448.0","form":"4","owners":["Gheorghe Iulian"],"plan_10b5_1":false,"price":"174.22","security":"Common Stock, par value $0.01 per share","shares":"175.0"},{"accession":"0001193125-26-191900","acquired_disposed":"D","code":"S","date":"2026-04-27","derivative":false,"filed":"2026-04-29","following_shares":"97339.0","form":"4","owners":["Harvey Keith"],"plan_10b5_1":false,"price":"175.09","security":"Common Stock, par value $0.01 per share","shares":"47001.0"}],"legal_name":null,"lei":null,"lei_status":null,"lei_updated_at":null,"names":[{"entity_id":null,"kind":"alias","name":"Kaiser Aluminum","source":"wikidata"},{"entity_id":null,"kind":"alias","name":"Kaiser Aluminum and Chemicals","source":"wikidata"}],"parent_exceptions":[],"parents":[],"wikidata_id":"Q6348410"},"research_built_at":"2026-09-08T00:28:31.573928+00:00","sources":[{"coverage":"8005 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer","id":"sec","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC submissions","retrieved_at":"2026-09-08T00:28:36.996621+00:00","status":"ok","url":"https://www.sec.gov/search-filings/edgar-application-programming-interfaces"},{"coverage":"1611 unambiguous CIK-linked entities; coverage is incomplete","id":"wikidata","license":"CC0-1.0","license_url":"https://www.wikidata.org/wiki/Wikidata:Licensing","name":"Wikidata structured data","retrieved_at":"2026-09-07T20:33:33.971872+00:00","status":"ok","url":"https://www.wikidata.org/"},{"coverage":"1177 checked identities; 0 unavailable records","id":"gleif","license":"CC0-1.0","license_url":"https://www.gleif.org/en/meta/lei-data-terms-of-use","name":"GLEIF legal entity reference data","retrieved_at":"2026-09-07T20:35:11.504394+00:00","status":"ok","url":"https://www.gleif.org/en/lei-data/gleif-api"},{"coverage":"4 selected series; gaps remain missing","id":"fed","license":"Public domain (selected government series)","license_url":"https://www.federalreserve.gov/disclaimer.htm","name":"Federal Reserve Board H.15","retrieved_at":"2026-09-08T00:28:58.131796+00:00","status":"ok","url":"https://www.federalreserve.gov/releases/h15/"},{"coverage":"9 selected series; gaps remain missing","id":"bls","license":"Public domain","license_url":"https://www.bls.gov/opub/copyright-information.htm","name":"Bureau of Labor Statistics","retrieved_at":"2026-09-08T00:28:59.313116+00:00","status":"ok","url":"https://www.bls.gov/developers/"},{"coverage":"2026 Q2: filings in this completed quarter; not a live transaction feed","id":"insiders","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC insider transactions","retrieved_at":"2026-09-07T20:35:31.647091+00:00","status":"ok","url":"https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets"}]}