TACOMA, Wash., June 30, 2025 /PRNewswire/ -- Columbia Banking System, Inc. ("Columbia"Nasdaq: COLB), parent company of Umpqua Bank, today announced it will release second quarter 2025 financial results on Thursday, July 24, 2025, after market close. The Company will host a conference call for investors and analysts at 2:00 p.m. PT (5:00 p.m. ET) that same day. During the call, management will discuss Columbia's second quarter 2025 financial results and provide an update on recent activities. There will be a ...