COLUMBIA BANKING SYSTEM, INC. current report, 30 September 2026

Columbia Banking System, Inc. — Form 8-K Summary

Business context and reporting period

Filed September 30, 2026. The 8-K reports that Columbia Banking System will hold a conference call to discuss its third-quarter 2026 results and recent activities.

Financial results and material changes

This filing does not report revenue, profit, cash flow, margins, debt, liquidity, or other financial results, and does not provide comparisons with prior periods.

Outlook and other disclosures

The earnings call is scheduled for October 22, 2026, at 2:00 p.m. PT (5:00 p.m. ET). No guidance, management commentary, risks, contingencies, or unusual items are disclosed in the provided filing text.

Important facts to verify

  • Review the third-quarter 2026 results and any updated outlook when released or discussed on the call.
  • Confirm the call details and related materials in Exhibit 99.1.