{"cik":"0000887343","ticker":"COLB","name":"COLUMBIA BANKING SYSTEM, INC.","sic_code":"6022","sic_description":"State Commercial Banks","exchange":"Nasdaq","state_of_incorporation":"WA","fiscal_year_end":"1231","first_filing_date":"2026-05-15","last_filing_date":"2026-09-08","url":"/sec/cik-0000887343","insider_summary":{"total_transactions":14,"unique_insiders":12,"latest_transaction":"2026-06-30"},"recent_filings":[{"accession_number":"0000887343-26-000181","form_type":"8-K","form_type_family":"current","doc_date":"2026-09-30","title":"8-K — COLUMBIA BANKING SYSTEM, INC. — 2026-09-30","url_slug":"/sec/cik-0000887343/8-k/0000887343-26-000181","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000181-index.html"},{"accession_number":"0000887343-26-000173","form_type":"8-K","form_type_family":"current","doc_date":"2026-08-14","title":"8-K — COLUMBIA BANKING SYSTEM, INC. — 2026-08-14","url_slug":"/sec/cik-0000887343/8-k/0000887343-26-000173","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000173-index.html"},{"accession_number":"0000902219-26-000265","form_type":"SCHEDULE 13G/A","form_type_family":"other","doc_date":"2026-08-13","title":"SCHEDULE 13G/A — COLUMBIA BANKING SYSTEM, INC. — 2026-08-13","url_slug":"/sec/cik-0000887343/schedule-13g-a/0000902219-26-000265","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000902219-26-000265-index.html"},{"accession_number":"0000887343-26-000170","form_type":"10-Q","form_type_family":"quarterly","doc_date":"2026-08-04","title":"10-Q — COLUMBIA BANKING SYSTEM, INC. — 2026-08-04","url_slug":"/sec/cik-0000887343/10-q/0000887343-26-000170","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000170-index.html"},{"accession_number":"0000887343-26-000167","form_type":"8-K","form_type_family":"current","doc_date":"2026-07-30","title":"8-K — COLUMBIA BANKING SYSTEM, INC. — 2026-07-30","url_slug":"/sec/cik-0000887343/8-k/0000887343-26-000167","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000167-index.html"},{"accession_number":"0000887343-26-000165","form_type":"8-K","form_type_family":"current","doc_date":"2026-07-23","title":"8-K — COLUMBIA BANKING SYSTEM, INC. — 2026-07-23","url_slug":"/sec/cik-0000887343/8-k/0000887343-26-000165","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000165-index.html"},{"accession_number":"0000887343-26-000159","form_type":"8-K","form_type_family":"current","doc_date":"2026-07-01","title":"8-K — COLUMBIA BANKING SYSTEM, INC. — 2026-07-01","url_slug":"/sec/cik-0000887343/8-k/0000887343-26-000159","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000159-index.html"},{"accession_number":"0000887343-26-000156","form_type":"11-K","form_type_family":"other","doc_date":"2026-06-25","title":"11-K — COLUMBIA BANKING SYSTEM, INC. — 2026-06-25","url_slug":"/sec/cik-0000887343/11-k/0000887343-26-000156","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000156-index.html"},{"accession_number":"0000887343-26-000150","form_type":"11-K/A","form_type_family":"other","doc_date":"2026-06-16","title":"11-K/A — COLUMBIA BANKING SYSTEM, INC. — 2026-06-16","url_slug":"/sec/cik-0000887343/11-k-a/0000887343-26-000150","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000150-index.html"},{"accession_number":"0000887343-26-000143","form_type":"8-K","form_type_family":"current","doc_date":"2026-05-15","title":"8-K — COLUMBIA BANKING SYSTEM, INC. — 2026-05-15","url_slug":"/sec/cik-0000887343/8-k/0000887343-26-000143","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000143-index.html"},{"accession_number":"0000887343-26-000142","form_type":"8-K","form_type_family":"current","doc_date":"2026-05-15","title":"8-K — COLUMBIA BANKING SYSTEM, INC. — 2026-05-15","url_slug":"/sec/cik-0000887343/8-k/0000887343-26-000142","edgar_url":"https://www.sec.gov/Archives/edgar/data/887343/0000887343-26-000142-index.html"}],"related_endpoints":{"profile":"/sec/COLB/profile","timeline":"/sec/COLB/timeline","peers":"/sec/COLB/peers","insider_pulse":"/sec/COLB/insider-pulse","insider_summary":"/sec/COLB/insider-summary","insider_transactions":"/sec/COLB/insider-transactions","form144":"/sec/COLB/form144","holdings_as_filer":"/sec/COLB/holdings","financial_facts":"/sec/COLB/financial-facts","derivatives":"/sec/COLB/derivatives","officers":"/sec/COLB/officers","insider_network":"/sec/COLB/insider-network","risk_flags":"/sec/COLB/risk-flags","filings":"/sec/COLB/filings","cross_topic_dossier":"/api/v1/dossier?ticker=COLB"}}