Anderson Drew K 4

What Happened
Drew K. Anderson, EVP & Chief Administrative Officer of Columbia Banking System, received an award of 3,146 shares that vested on Feb 2, 2026 (performance restricted stock units). The shares are reported at $29.69 each (total value $93,405). To satisfy tax withholding on the vesting, 1,710 shares were withheld (disposed) at the same price, representing $50,770. Net shares delivered to Anderson after withholding were 1,436.

Key Details

• Transaction dates: 2026-02-02 (vesting and withholding); filing date: 2026-02-04 (timely filing).
• Prices and values: 3,146 shares @ $29.69 = $93,405 (award); 1,710 shares withheld @ $29.69 = $50,770 (tax withholding).
• Net shares received: 1,436 (3,146 granted − 1,710 withheld).
• Shares owned after transaction: not disclosed in the information provided in this summary; see the Form 4 for full holdings.
• Footnotes: F1 — shares granted pursuant to performance RSUs awarded Feb 21, 2023 and vested based on Columbia’s relative return on tangible common equity vs. peers for FY2023–2025; F2 — withholding of shares to satisfy the reporting person’s tax obligations.
• Transaction codes: A = Award/Grant (vesting of PRSUs); F = Tax withholding (disposition to cover taxes).

Context
This was a vesting of performance-based restricted stock units, not an open-market purchase or sale of shares. Withholding shares to cover taxes is a routine administrative step and does not by itself indicate the insider is selling shares for portfolio reasons. For investors, vested performance awards reflect prior compensation grants tied to multi-year performance metrics rather than new cash purchases by the insider.