• Torran Nixon will leave his roles as Columbia Bank co-president and Columbia Banking System senior executive vice president.
• He will transition to a senior advisor role on July 1, 2027, or another mutually agreed date.
• Nixon will serve as an advisor until his retirement on December 31, 2027.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Columbia Banking System Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001193125-26-434182), on October 27, 2026, and is solely responsible for the information contained therein.