Anderson Drew K 4

What Happened Drew K. Anderson, EVP & Chief Administrative Officer of Columbia Banking System, Inc. (COLB), disposed of 1,808 shares on March 1, 2026 at an effective price of $28.45 per share, a transaction valued at approximately $51,438. The filing shows this was a share withholding to cover tax obligations (transaction code F), not an open‑market cash sale.

Key Details

• Transaction date: 2026-03-01; Filing date (Form 4): 2026-03-02 (timely).
• Shares disposed: 1,808 at $28.45 each; total value ≈ $51,438.
• Transaction code: F — payment of exercise price or tax liability via withholding/surrender of shares.
• Shares owned after the transaction: not specified in the provided filing.
• No indication in this filing of a 10b5-1 plan or other trading arrangement.

Context Code F transactions typically reflect tax withholding after option exercises or vesting of restricted stock and are routine administrative actions rather than directional trades. Such surrenders reduce the insider’s holdings but do not necessarily signal a change in confidence; purchases are generally more informative about insider sentiment.