{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-193405","form_type":"8-K","ticker":"COLB","cik":"0000887343","company_name":"COLUMBIA BANKING SYSTEM, INC.","filed_at":"2025-09-02T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.596634+00:00","generated_at":"2026-05-17T09:07:24.220209+00:00","sec_items":["2.01","5.02","7.01","9.01"],"event_type":"m_and_a","sentiment":"positive","materiality_score":0.9,"calibrated_materiality_score":0.9,"confidence":"high","headline":"Columbia Banking System completes all-stock acquisition of Pacific Premier Bancorp","bullets":["Each Pacific Premier share converted into 0.9150 share of Columbia common stock; former PPBI shareholders hold ~30% of combined company.","Combined company has ~$70B assets, ~$50B loans, ~$56B deposits, and >350 branches across 8 western states.","Three former Pacific Premier directors (Steven Gardner, M. Christian Mitchell, Jaynie Miller Studenmund) join Columbia board; Gardner also enters $2.2M consulting agreement.","Tom Rice, former Pacific Premier CIO, joins Columbia Bank's executive leadership team as CIO.","Systems integration expected in Q1 2026; brand transition from Umpqua to Columbia complete as of Sept 1, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-193405","json":"https://secwatch.observer/filing/0001193125-25-193405.json","markdown":"https://secwatch.observer/filing/0001193125-25-193405.md","text":"https://secwatch.observer/filing/0001193125-25-193405.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/887343/000119312525193405/0001193125-25-193405-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/887343/000119312525193405/d21865d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T09:07:24.220209+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"}