COLUMBIA BANKING SYSTEM, INC. 8-K

What Happened
Columbia Banking System, Inc. (COLB) filed an 8-K on December 31, 2025 to announce it will host a quarterly earnings conference call on Thursday, January 22, 2026 at 2:00 p.m. PT (5:00 p.m. ET). During the call, management will discuss Columbia’s fourth quarter 2025 financial results and provide an update on recent activities. A press release with the conference call information is attached as Exhibit 99.1 to the filing.

Key Details

• Earnings call scheduled for Thursday, January 22, 2026 at 2:00 p.m. PT / 5:00 p.m. ET.
• Topic: Columbia’s fourth quarter 2025 financial results and updates on recent activities.
• Filing date of the 8-K: December 31, 2025; press release included as Exhibit 99.1.

Why It Matters
This filing signals when and how Columbia will release its Q4 2025 quarterly results and management commentary—important timing for investors tracking earnings, revenue trends, and company updates. The conference call provides an opportunity to hear management’s discussion of results and any operational or strategic developments that could affect the stock.