Lakely Brock 4

What Happened
Lakely Brock, Executive Vice President and Chief Accounting Officer of Columbia Banking System, Inc. (COLB), disposed of 396 shares on April 15, 2026. The shares were disposed at $29.10 each for a total value of $11,524. This filing is coded "F" — a payment of exercise price or tax liability — meaning the shares were surrendered or sold to satisfy tax withholding related to a prior equity award or option exercise (a routine, non-investment-driven transaction).

Key Details

• Transaction date: 2026-04-15; price per share: $29.10; total value: $11,524.
• Transaction code: F (payment of exercise price or tax liability / tax withholding).
• Shares disposed: 396.
• Shares owned after the transaction: not specified in this filing.
• Filing date: 2026-04-16 (filed promptly the next day; not marked late).

Context
An "F" code typically reflects withholding to cover taxes from an equity award or option exercise (often called a cashless or share-withholding settlement). These transactions are standard administrative actions and do not necessarily indicate the insider's view on the company's stock.