{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-290691","form_type":"8-K","ticker":"COLB","cik":"0000887343","company_name":"COLUMBIA BANKING SYSTEM, INC.","filed_at":"2025-11-21T23:59:59+00:00","discovered_at":"2026-05-14T18:02:42.496521+00:00","generated_at":"2026-05-16T17:48:57.245336+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Columbia Banking appoints Brock Lakely as Chief Accounting Officer; Lisa White departs","bullets":["Lisa M. White ceased as EVP, Principal Accounting Officer and Corporate Controller effective Nov 19, 2025.","Brock Lakely appointed EVP, Chief Accounting Officer and Corporate Controller effective Nov 20, 2025.","Lakely's annual base salary set at $360,000; he previously served as Chief Audit Executive and earlier as Chief Accounting Officer from 2018-2023.","Lakely is a CPA with prior Ernst & Young experience; no familial or reportable transaction relationships disclosed."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-290691","json":"https://secwatch.observer/filing/0001193125-25-290691.json","markdown":"https://secwatch.observer/filing/0001193125-25-290691.md","text":"https://secwatch.observer/filing/0001193125-25-290691.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/887343/000119312525290691/0001193125-25-290691-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/887343/000119312525290691/d90471d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T17:48:57.245336+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}