Devine David Moore - 20 Jan 2026 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Reporting relationship: EVP Chief Marketing Officer
Issuer ticker: COLB
Reported as of: 20 Jan 2026
Net transaction value: -$17,804
SEC form: 4
Accepted by SEC: 22 Jan 2026, 18:11:48 UTC
Prior SEC filing: 04 Mar 2025
Next SEC filing: 04 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Andrea M. Newburn, Attorney-in-fact

Key filing fact

Devine David Moore filed Form 4 for COLUMBIA BANKING SYSTEM, INC. (COLB) on 22 Jan 2026.

Key facts

This page summarizes Devine David Moore's Form 4 filing for COLUMBIA BANKING SYSTEM, INC. (COLB).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 22 Jan 2026, 18:11.

Change

Previous filing in this sequence was filed on 04 Mar 2025.
Current net transaction value: -$17,804.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001798077 Primary reporting owner

Moore Devine David

Relationship: EVP Chief Marketing Officer
Address: C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA
Signature: /s/ Andrea M. Newburn, Attorney-in-fact
Signature date: 22 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

COLB transaction

Common Stock

Disposed to Issuer

Transaction value: $0
Shares: -260
Change %: -1.1%
Price: $0.000000
Shares after: 22,765
Date: 20 Jan 2026
Ownership: Direct
Footnotes: F1

COLB transaction

Common Stock

Tax liability

Transaction value: $17,804
Shares: -628
Change %: -2.8%
Price: $28.35
Shares after: 22,137
Date: 20 Jan 2026
Ownership: Direct
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Shares forfeited pursuant to the terms of the performance restricted stock units granted on February 21, 2023 and reported on the reporting person's Form 4 filed on February 21, 2023 (in accordance with Rule 16b-3(e)) due to the issuer's total shareholder return performance target not being met at target.

Footnote F2

Represents withholding of shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the vesting of previously issued restricted stock units.