COLUMBIA BANKING SYSTEM, INC.·4

Mar 2, 9:02 PM ET

Lakely Brock 4

4 · COLUMBIA BANKING SYSTEM, INC. · Filed Mar 2, 2026

Research Summary

AI-generated summary of this filing

Updated

COLB EVP Lakely Brock Withholds 391 Shares for Taxes

What Happened Lakely Brock, Executive Vice President and Chief Accounting Officer of Columbia Banking System (COLB), had 391 shares withheld to satisfy tax liability related to a prior equity award or option exercise. The withholding was reported as a disposition of 391 shares at $28.45 per share, totaling approximately $11,124. This is a tax-withholding event (code F), not an open-market sale.

Key Details

  • Transaction date: 2026-03-01; Filing date: 2026-03-02 (appears timely).
  • Price used for withholding: $28.45 per share.
  • Shares withheld/disposed: 391; value ≈ $11,124.
  • Transaction code: F — payment of exercise price or tax liability (shares withheld).
  • Shares owned after transaction: not provided in the summary shown; see the full Form 4 for post-transaction holdings.
  • No 10b5-1 plan, gift, or other special notation was indicated in the provided data.

Context Tax-withholding dispositions are routine when executives exercise options or when restricted shares vest and taxes are due; they do not represent an open-market sale decision and generally don't signal a change in insider sentiment. For complete ownership details or to verify whether shares were also sold or exercised that day, review the full Form 4 filing (Accession 0000887343-26-000096).

Insider Transaction Report

Form 4
Period: 2026-03-01
Lakely Brock
EVP, Chief Accounting Officer
Transactions
  • Tax Payment

    Common Stock

    2026-03-01$28.45/sh391$11,12410,469 total
Signature
/s/ Andrea M. Newburn, Attorney-in-fact|2026-03-02

Documents

1 file
  • 4
    wk-form4_1772503321.xmlPrimary

    FORM 4