TACOMA, Wash., April 1, 2024 /PRNewswire/ -- Columbia Banking System, Inc. ("Columbia"Nasdaq: COLB), parent company of Umpqua Bank, today announced it will release first quarter 2024 financial results on Thursday, April 25, 2024, 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 first quarter 2024 financial results and provide an update on recent activities. There will be a ...