Columbia Banking System, the parent company of Columbia State Bank, completed the merger with Umpqua Holdings, the parent company of Umpqua Bank, in an $8.2bn deal. "Today marks the beginning of an exciting new chapter for our company. We have tremendous opportunity to deliver enhanced shareholder returns by building upon our combined bank's commitment to the success and prosperity of all our stakeholders," Cort O'Haver, Umpqua President and CEO.