Devine David Moore - 02 Feb 2026 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Reporting relationship: EVP Chief Marketing Officer
Issuer ticker: COLB
Reported as of: 02 Feb 2026
Net transaction value: +$33,550
SEC form: 4
Accepted by SEC: 04 Feb 2026, 18:59:15 UTC
Prior SEC filing: 22 Jan 2026
Next SEC filing: 18 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 04 Feb 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: 04 Feb 2026, 18:59.

Change

Previous filing in this sequence was filed on 22 Jan 2026.
Current net transaction value: +$33,550.

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: 04 Feb 2026

Reported non-derivative transactions

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

COLB transaction

Common Stock

Award

Transaction value: $62,201
Shares: +2,095
Change %: +9.5%
Price: $29.69
Shares after: 24,232
Date: 02 Feb 2026
Ownership: Direct
Footnotes: F1

COLB transaction

Common Stock

Tax liability

Transaction value: $28,651
Shares: -965
Change %: -4%
Price: $29.69
Shares after: 23,267
Date: 02 Feb 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 granted pursuant to the terms of the performance restricted stock units granted on February 21, 2023, which vested on February 2, 2026 based on to the issuer's relative return on tangible common equity for fiscal years 2023-2025 compared to a Compensation Committee approved group of peers.

Footnote F2

Represents withholding of shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the shares granted pursuant to the terms of the performance restricted stock units vesting.