{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-094676","form_type":"8-K","ticker":"COLB","cik":"0000887343","company_name":"COLUMBIA BANKING SYSTEM, INC.","filed_at":"2025-04-25T23:59:59+00:00","discovered_at":"2026-05-14T18:02:51.628545+00:00","generated_at":"2026-05-23T06:30:39.339566+00:00","sec_items":["1.01","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.8,"calibrated_materiality_score":0.8,"confidence":"high","headline":"Columbia Banking to acquire Pacific Premier Bancorp in all-stock merger (0.9150x)","bullets":["Each PPBI share converts to 0.9150 COLB shares; fractional shares paid in cash.","Termination fee of $75M payable by either party under specified conditions.","Three PPBI directors, incl. CEO Steven R. Gardner, to join Columbia board.","Deal requires approvals from Columbia & Pacific Premier shareholders and regulators (Fed, FDIC, Oregon).","Columbia will file Form S-4 with joint proxy/prospectus for shareholder votes."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-094676","json":"https://secwatch.observer/filing/0001193125-25-094676.json","markdown":"https://secwatch.observer/filing/0001193125-25-094676.md","text":"https://secwatch.observer/filing/0001193125-25-094676.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/887343/000119312525094676/0001193125-25-094676-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/887343/000119312525094676/d677345d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-23T06:30:39.339566+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"}