Columbia Banking System, INC. (COLB) SEC Filings — 2025

Filings

• Columbia Banking System, INC. 8-K Filing — 8-K · Dec 31, 2025
• Columbia Banking System Announces Board and Officer Changes — 8-K · Nov 21, 2025
• Columbia Banking System, INC. 8-K Filing — 8-K · Nov 14, 2025
• COLB Net Income Plunges 34% Amid Pacific Premier Acquisition Costs — 10-Q · Nov 6, 2025
• Columbia Banking System, INC. 8-K Filing — 8-K · Nov 4, 2025
• Columbia Banking System Files 8-K on Financials — 8-K · Oct 30, 2025
• Columbia Banking System Files 8-K/A Amendment — 8-K/A · Sep 3, 2025
• Columbia Banking System Reports 8-K Filing — 8-K · Sep 2, 2025
• Columbia Banking System Files 8-K — 8-K · Aug 29, 2025
• Columbia Banking System Files 8-K — 8-K · Aug 15, 2025
• Columbia Banking System Q2 Net Income Dips to $45.2M — 10-Q · Aug 6, 2025
• Columbia Banking System Files 8-K — 8-K · Jul 24, 2025
• Columbia Banking System Files 8-K — 8-K · Jul 22, 2025
• Columbia Banking System, Inc. Files 8-K — 8-K · Jul 11, 2025
• Columbia Banking System, Inc. Files 8-K — 8-K · Jun 30, 2025
• Columbia Banking System, Inc. Files 8-K — 8-K · May 16, 2025
• Columbia Banking System Files 8-K on Shareholder Vote Matters — 8-K · May 15, 2025
• Columbia Banking System Files 10-Q for Q1 2025 — 10-Q · May 6, 2025
• Columbia Banking System, Inc. Files 8-K — 8-K · May 5, 2025
• Columbia Banking System Files 8-K for Material Agreement — 8-K · Apr 25, 2025
• Columbia Banking System Files 8-K — 8-K · Apr 23, 2025
• Columbia Banking System Files 8-K — 8-K · Apr 23, 2025
• Columbia Banking System DEF 14A Filing — DEF 14A · Apr 3, 2025
• Columbia Banking System Reports Director/Officer Changes & Financials — 8-K · Apr 2, 2025
• Columbia Banking System, Inc. Files 8-K — 8-K · Mar 31, 2025
• Columbia Banking System Files 8-K for Regulation FD Disclosure — 8-K · Mar 27, 2025
• Columbia Banking System Files 2024 10-K — 10-K · Feb 25, 2025
• Columbia Banking System Files 8-K — 8-K · Feb 14, 2025
• Columbia Banking System Files 8-K — 8-K · Jan 23, 2025