On August 31, 2025, Columbia Banking System, Inc.’s acquisition of Pacific Premier Bancorp, Inc. was completed, and we welcome our new shareholders. Additional information related to the conversion of Pacific Premier Bancorp, Inc. common stock into the right to receive shares of Columbia Banking System, Inc. common stock is available under IR Resources-FAQ.

Columbia Banking System, Inc. (Nasdaq: COLB) is headquartered in Tacoma, Washington and is the parent company of Columbia Bank, an award-winning western U.S. regional bank. Columbia Bank is the largest bank headquartered in the Northwest and one of the largest banks headquartered in the West with locations in Arizona, California, Colorado, Idaho, Nevada, Oregon, Utah, and Washington. Columbia Bank combines the resources, sophistication, and expertise of a national bank with a commitment to deliver superior, personalized service. The bank supports consumers and businesses through a full suite of services, including retail and commercial banking, Small Business Administration lending, institutional and corporate banking, and equipment leasing. Columbia Bank customers also have access to comprehensive investment and wealth management expertise as well as healthcare and private banking through Columbia Wealth Management.