{"filing":{"accession_number":"0001193125-26-388649","cik":"0001675149","ticker":"AA","company_name":"Alcoa Corp","form":"8-K","filing_date":"2026-09-11","report_date":"2026-09-10","primary_document":"d23778d8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1675149/000119312526388649/d23778d8k.htm"},"events":[{"id":32832,"run_id":30184,"accession_number":"0001193125-26-388649","anchor_item_number":"8.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"summary":"Alcoa is disclosing South32's notice of meeting and explanatory memorandum for a shareholder vote on the \"proposed sale of South32's interests in certain bauxite, alumina and aluminum operations to Alcoa Corporation\" pursuant to an Umbrella Implementation Deed dated June 30, 2026. This is a material acquisition by Alcoa of South32's aluminum value chain assets (other than Mozal), which constitutes a significant M\u0026A transaction requiring shareholder approval and disclosure under Item 8.01.","company_name":"Alcoa Corp","ticker":"AA","filing_date":"2026-09-11","form":"8-K","submitted_at":null,"items":[{"id":36104,"accession_number":"0001193125-26-388649","item_number":"8.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"Alcoa is disclosing South32's notice of meeting and explanatory memorandum for a shareholder vote on the \"proposed sale of South32's interests in certain bauxite, alumina and aluminum operations to Alcoa Corporation\" pursuant to an Umbrella Implementation Deed dated June 30, 2026. This is a material acquisition by Alcoa of South32's aluminum value chain assets (other than Mozal), which constitutes a significant M\u0026A transaction requiring shareholder approval and disclosure under Item 8.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:20:48.441525+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":36104,"accession_number":"0001193125-26-388649","item_number":"8.01","item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.95,"reasoning":"Alcoa is disclosing South32's notice of meeting and explanatory memorandum for a shareholder vote on the \"proposed sale of South32's interests in certain bauxite, alumina and aluminum operations to Alcoa Corporation\" pursuant to an Umbrella Implementation Deed dated June 30, 2026. This is a material acquisition by Alcoa of South32's aluminum value chain assets (other than Mozal), which constitutes a significant M\u0026A transaction requiring shareholder approval and disclosure under Item 8.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:20:48.441525+00:00","company_name":"Alcoa Corp","ticker":"AA","filing_date":"2026-09-11"}]}