{"filing":{"accession_number":"0000887343-26-000184","cik":"0000887343","ticker":"COLB","company_name":"COLUMBIA BANKING SYSTEM, INC.","form":"8-K","filing_date":"2026-10-22","report_date":"2026-10-22","primary_document":"colb-20261022.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/887343/000088734326000184/colb-20261022.htm"},"events":[{"id":37255,"run_id":34345,"accession_number":"0000887343-26-000184","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 October 22, 2026 announcing third quarter 2026 financial results, including net income of $220 million, diluted EPS of $0.78, and net interest margin of 4.11%, along with an investor slide presentation for the earnings conference call.","company_name":"COLUMBIA BANKING SYSTEM, INC.","ticker":"COLB","filing_date":"2026-10-22","form":"8-K","submitted_at":null,"items":[{"id":41910,"accession_number":"0000887343-26-000184","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 October 22, 2026 announcing third quarter 2026 financial results, including net income of $220 million, diluted EPS of $0.78, and net interest margin of 4.11%. The filing explicitly states the press release is attached as Exhibit 99.1 and discloses quarterly financial performance metrics, balance sheet data, and operational highlights—the hallmark of an earnings release under Item 2.02.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-22T20:18:58.210619+00:00","company_name":"","ticker":null,"filing_date":""},{"id":41911,"accession_number":"0000887343-26-000184","item_number":"7.01","item_title":null,"event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 7.01 disclosure references an investor slide presentation issued on October 22, 2026, to be reviewed in conjunction with Columbia Banking System's earnings release conference call on the same date. The attached Exhibit 99.1 is a press release announcing third quarter 2026 financial results, including net income of $220 million, diluted EPS of $0.78, 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":"2026-10-22T20:18:58.210619+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":41910,"accession_number":"0000887343-26-000184","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 October 22, 2026 announcing third quarter 2026 financial results, including net income of $220 million, diluted EPS of $0.78, and net interest margin of 4.11%. The filing explicitly states the press release is attached as Exhibit 99.1 and discloses quarterly financial performance metrics, balance sheet data, and operational highlights—the hallmark of an earnings release under Item 2.02.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-22T20:18:58.210619+00:00","company_name":"COLUMBIA BANKING SYSTEM, INC.","ticker":"COLB","filing_date":"2026-10-22"},{"id":41911,"accession_number":"0000887343-26-000184","item_number":"7.01","item_title":null,"event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 7.01 disclosure references an investor slide presentation issued on October 22, 2026, to be reviewed in conjunction with Columbia Banking System's earnings release conference call on the same date. The attached Exhibit 99.1 is a press release announcing third quarter 2026 financial results, including net income of $220 million, diluted EPS of $0.78, 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":"2026-10-22T20:18:58.210619+00:00","company_name":"COLUMBIA BANKING SYSTEM, INC.","ticker":"COLB","filing_date":"2026-10-22"}]}