{"filing":{"accession_number":"0000887343-26-000165","cik":"0000887343","ticker":"COLB","company_name":"COLUMBIA BANKING SYSTEM, INC.","form":"8-K","filing_date":"2026-07-23","report_date":null,"primary_document":"colb-20260723.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/887343/000088734326000165/colb-20260723.htm"},"events":[{"id":20130,"run_id":18120,"accession_number":"0000887343-26-000165","anchor_item_number":"2.02","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.97,"summary":"Columbia Banking System issued a press release on July 23, 2026 announcing second quarter 2026 financial results, including net income of $208 million, diluted EPS of $0.73, net interest income of $589 million, and return on average assets of 1.27%.","company_name":"COLUMBIA BANKING SYSTEM, INC.","ticker":"COLB","filing_date":"2026-07-23","form":"8-K","submitted_at":null,"items":[{"id":19413,"accession_number":"0000887343-26-000165","item_number":"2.02","item_title":null,"event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"Columbia Banking System issued a press release on July 23, 2026 announcing second quarter 2026 financial results, including net income of $208 million, diluted EPS of $0.73, and key metrics such as net interest income of $589 million and return on average assets of 1.27%. This is a standard quarterly earnings disclosure attached as Exhibit 99.1, which is material to investors assessing the registrant's financial performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:33:29.822971+00:00","company_name":"","ticker":null,"filing_date":""},{"id":19414,"accession_number":"0000887343-26-000165","item_number":"7.01","item_title":null,"event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"Item 7.01 discloses an investor slide presentation issued on July 23, 2026 in conjunction with Columbia Banking System's earnings release conference call. The supplemental exhibit EX-99.1 contains the full press release announcing second quarter 2026 financial results, including net income of $208 million, diluted EPS of $0.73, and detailed financial metrics. This is a standard earnings release disclosure material to investors assessing the registrant's financial performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:33:29.822971+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":19413,"accession_number":"0000887343-26-000165","item_number":"2.02","item_title":null,"event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"Columbia Banking System issued a press release on July 23, 2026 announcing second quarter 2026 financial results, including net income of $208 million, diluted EPS of $0.73, and key metrics such as net interest income of $589 million and return on average assets of 1.27%. This is a standard quarterly earnings disclosure attached as Exhibit 99.1, which is material to investors assessing the registrant's financial performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:33:29.822971+00:00","company_name":"COLUMBIA BANKING SYSTEM, INC.","ticker":"COLB","filing_date":"2026-07-23"},{"id":19414,"accession_number":"0000887343-26-000165","item_number":"7.01","item_title":null,"event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"Item 7.01 discloses an investor slide presentation issued on July 23, 2026 in conjunction with Columbia Banking System's earnings release conference call. The supplemental exhibit EX-99.1 contains the full press release announcing second quarter 2026 financial results, including net income of $208 million, diluted EPS of $0.73, and detailed financial metrics. This is a standard earnings release disclosure material to investors assessing the registrant's financial performance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-23T20:33:29.822971+00:00","company_name":"COLUMBIA BANKING SYSTEM, INC.","ticker":"COLB","filing_date":"2026-07-23"}]}