SEC Filing Summary for Moore Devine David - Common Stock Transactions

This filing details transactions made by Moore Devine David, EVP Chief Marketing Officer of COLUMBIA BANKING SYSTEM, INC. (COLB). On June 8, 2026, Mr. David disposed of 60 shares of Common Stock at a price of $29.77 per share, leaving him with 22,448 shares. In a separate transaction on the same date, he disposed of an additional 3,812 shares of Common Stock at $29.775 per share, resulting in 18,636 shares remaining. These transactions were reported on Form 4, filed on June 10, 2026.