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Columbia Banking System Completes Acquisition of Pacific Premier Bancorp and Unifies Columbia Brand

9/2/2025 7:00:00 AMColumbia Banking System Completes Acquisition of Pacific Premier Bancorp and Unifies Columbia Brand TACOMA, Wash., (September 2, 2025)—Columbia Banking System, Inc. ("Columbia") (Nasdaq: COLB), the parent company of Columbia Bank, and Pacific Premier Bancorp, Inc. (“Pacific Premier”) (Nasdaq: PPBI), the parent company of Pacific Premier Bank, National Association (“Pacific Premier Bank”), jointly announced today the closing of Columbia’s previously announced acquisition of Pacific