Insider Transaction Report for David Moore

David Moore, EVP Chief Marketing Officer at COLUMBIA BANKING SYSTEM, INC. (COLB), reported a series of transactions on March 13, 2026. Moore acquired 940 shares of Common Stock at \$26.23 per share and disposed of 376 shares of Common Stock at the same price. Additionally, Moore disposed of 940 Restricted Stock Units, which are convertible into Common Stock on a one-for-one basis. These transactions resulted in a net change in Moore\'s holdings. The reported grant of 2,819 Restricted Stock Units on February 25, 2025, vests in three annual installments starting March 13, 2026, with the disposed units likely being part of this grant.