Deer Aaron James 4

What Happened
Aaron Deer, EVP & Chief Strategy and Innovation Officer at Columbia Banking System (COLB), had 2,620 performance-based restricted stock units vest on Feb 2, 2026. The vested shares were valued at $29.69 each for a gross value of $77,788. To satisfy tax withholding, 1,191 shares (worth $35,361) were withheld, leaving a net delivery of 1,429 shares (net value ≈ $42,427). This was an award/vesting event (not an open-market buy or sale).

Key Details

• Transaction date: 2026-02-02; filing date: 2026-02-04 (filed timely).
• Price used: $29.69 per share.
• Gross shares vested: 2,620 (total value $77,788).
• Shares withheld for taxes: 1,191 (value $35,361) — tax withholding (Code F).
• Net shares delivered: 1,429 (net value ≈ $42,427).
• Shares owned after transaction: not reported in the provided filing.
• Footnotes: F1 — RSUs granted Feb 21, 2023, vested based on Columbia’s relative return on tangible common equity vs peer group for FY 2023–2025; F2 — withholding to satisfy tax obligations.
• Transaction codes: A = Award/Grant (vesting); F = Tax withholding.

Context
This was a performance-based RSU vesting tied to multi-year relative performance metrics, not a purchase or sale that signals a change in voting or market exposure. Withholding of shares to cover taxes is a routine administrative step (a form of cashless tax payment) and is common when awards vest.