{"filing":{"accession_number":"0001554855-26-002144","cik":"0001430162","ticker":"CSAN","company_name":"Cosan S.A.","form":"6-K","filing_date":"2026-10-20","report_date":"2026-10-20","primary_document":"MainDocument.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1430162/000155485526002144/MainDocument.htm"},"events":[{"id":36521,"run_id":33673,"accession_number":"0001554855-26-002144","anchor_item_number":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"Cosan discloses the termination of exclusive negotiations for a potential sale of its equity interest in Rumo S.A. The filing explicitly references prior notices (June 29, 2026) and a Material Fact disclosure (August 20, 2026) regarding proposals for the sale, and now reports that the exclusivity period has expired without reaching an agreement. This represents a material development in M\u0026A activity—specifically the failure to complete a contemplated disposition of a significant asset—that would affect a reasonable investor's assessment of the company's capital structure and strategic direction.","company_name":"Cosan S.A.","ticker":"CSAN","filing_date":"2026-10-20","form":"6-K","submitted_at":null,"items":null}],"classifications":[{"id":40971,"accession_number":"0001554855-26-002144","item_number":null,"item_title":null,"event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"Cosan discloses the termination of exclusive negotiations for a potential sale of its equity interest in Rumo S.A. The filing explicitly references prior notices (June 29, 2026) and a Material Fact disclosure (August 20, 2026) regarding proposals for the sale, and now reports that the exclusivity period has expired without reaching an agreement. This represents a material development in M\u0026A activity—specifically the failure to complete a contemplated disposition of a significant asset—that would affect a reasonable investor's assessment of the company's capital structure and strategic direction.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-10-21T10:04:03.837438+00:00","company_name":"Cosan S.A.","ticker":"CSAN","filing_date":"2026-10-20"}]}