{"url_path":"/sec/colb/8-k/2026-05-15/item-9-01","section_key":"item-9-01","section_title":"Item 9.01 Financial Statements and Exhibits","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-05-15","source_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000143-index.html","accession_number":"0000887343-26-000143","cik":"0000887343","ticker":"COLB","issuer_name":"COLUMBIA BANKING SYSTEM, INC.","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000143-index.html","primary_entity_key":"0000887343","primary_entity_name":"COLUMBIA BANKING SYSTEM, INC."},"word_count":78,"has_tables":true,"body_markdown":"Item 9.01Financial Statements and Exhibits\n\n  \n\n(d)Exhibits.\n\n \n[99.1 Press Release Announcing Quarterly Cash Dividend](colbex991dividendannouncem.htm)\n\n104 Cover Page Interactive Data File (embedded within the Inline XBRL document)\n\nSIGNATURES\n\nPursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.\n\n \nCOLUMBIA BANKING SYSTEM, INC.\n\n(Registrant)\n\nDated: May 15, 2026\nBy: /s/ Kumi Yamamoto Baruffi\n\nKumi Yamamoto Baruffi\n\nExecutive Vice President, General Counsel"}