Columbia Banking System, Inc.

President, CEO & Chairman of the Board

Chief Information Officer

Executive Vice President, General Counsel & Corporate Secretary

Executive Vice President & Chief Risk Officer

Executive Vice President & Chief Administrative Officer

CFO & Executive Vice President

Executive Vice President & Chief Human Resources Officer

Senior EVice President & President & Co-President of Columbia Bank

Executive VP, Chief Accounting Officer & Corporate Controller

Head of Investor Relations

Advisor

Senior EVP & Co-President of Columbia Bank