Tacoma, USA, November 13, 2026 / PRNewswire / -- Columbia Banking System, Inc. ("Columbia", NASDAQ ticker: COLB), the parent company of Columbia Bank, announced today that its board of directors has approved a quarterly cash dividend of $0.38 per common share, representing a 3% increase from the most recent Columbia dividend announcement.

The dividend will be paid on December 14, 2026, with the registration date being November 27, 2026.

Columbia, Chairman and Chief Executive Officer, Clint Stein stated: "Raising the dividend to $0.38 reflects our confidence in financial performance, as well as the benefits derived from large-scale share repurchases over the past year. We expect that continuing to implement our strategic priorities, including the goal of optimizing the balance sheet, will drive meaningful capital generation in the coming quarters. Together with the $1.2 billion share repurchase plan recently authorized by the board of directors, today's announcement supports our commitment to realizing long-term shareholder value through a prudent and robust capital return platform."

About Columbia

Columbia Banking System, Inc. (Nasdaq ticker: COLB) Headquartered in Tacoma, Washington, it is the parent company of Columbia Bank. Columbia Bank is an award-winning, leading regional bank with offices in Arizona, California, Colorado, Idaho, Nevada, Oregon, Texas, Utah, and Washington. Columbia Bank combines the resources, expertise, and experience of a national bank with a commitment to providing exceptional, personalized services. The bank supports consumers and businesses with a full range of services including retail and commercial banking, small business administration loans, institutional and corporate banking, as well as equipment leasing. Columbia Bank customers also have access to comprehensive investment and wealth management services, as well as healthcare and private banking services provided through Columbia Wealth Management. For more information, please visit www.columbiabankingsystem.com.

Explanation of Forward-Looking Statements

This press release contains forward-looking statements as defined by the Private Securities Litigation Reform Act of 1995, which can be identified by phrases such as “may”, “expected”, “anticipate”, “continue”, and other similar language. In addition to statements of historical facts, all statements regarding Columbia expectations or anticipated future events are considered forward-looking statements. Readers are advised to refer to the reports submitted to the U.S. Securities and Exchange Commission (SEC) by Columbia, particularly the annual report 10-K for the fiscal year ending December 31, 2025, as well as the quarterly reports 10-Q for March 31, 2026, June 30, 2026, and September 30, 2026, in order to obtain significant cautionary information regarding possible material differences between actual results and management's expectations.