{"filing":{"accession_number":"0001193125-26-427927","cik":"0000811596","ticker":"KALU","company_name":"KAISER ALUMINUM CORP","form":"8-K","filing_date":"2026-10-21","report_date":"2026-10-21","primary_document":"kalu-20261021.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/811596/000119312526427927/kalu-20261021.htm"},"events":[{"id":36844,"run_id":33968,"accession_number":"0001193125-26-427927","anchor_item_number":"2.02","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"summary":"Kaiser Aluminum issued a press release on October 21, 2026 reporting preliminary, unaudited financial results for Q3 2026, including net sales of $1.2 billion, net income of $31 million ($1.84 per diluted share), and adjusted EBITDA of $84 million. The disclosure is filed under Item 2.02 (Results of Operations and Financial Condition) with the press release furnished as Exhibit 99.1, which is the standard format for quarterly earnings releases. The filing includes detailed financial tables, management commentary, and forward guidance, all hallmarks of an earnings release.","company_name":"KAISER ALUMINUM CORP","ticker":"KALU","filing_date":"2026-10-21","form":"8-K","submitted_at":null,"items":[{"id":41393,"accession_number":"0001193125-26-427927","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"Kaiser Aluminum issued a press release on October 21, 2026 reporting preliminary, unaudited financial results for Q3 2026, including net sales of $1.2 billion, net income of $31 million ($1.84 per diluted share), and adjusted EBITDA of $84 million. The disclosure is filed under Item 2.02 (Results of Operations and Financial Condition) with the press release furnished as Exhibit 99.1, which is the standard format for quarterly earnings releases. The filing includes detailed financial tables, management commentary, and forward guidance, all hallmarks of an earnings release.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-21T20:52:54.194237+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":41393,"accession_number":"0001193125-26-427927","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"Kaiser Aluminum issued a press release on October 21, 2026 reporting preliminary, unaudited financial results for Q3 2026, including net sales of $1.2 billion, net income of $31 million ($1.84 per diluted share), and adjusted EBITDA of $84 million. The disclosure is filed under Item 2.02 (Results of Operations and Financial Condition) with the press release furnished as Exhibit 99.1, which is the standard format for quarterly earnings releases. The filing includes detailed financial tables, management commentary, and forward guidance, all hallmarks of an earnings release.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-21T20:52:54.194237+00:00","company_name":"KAISER ALUMINUM CORP","ticker":"KALU","filing_date":"2026-10-21"}]}