COLUMBIA BANKING SYSTEM, INC. - 20 Nov 2025 Form 3 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Reporting relationship: EVP, Chief Accounting Officer
Issuer ticker: COLB
Reported as of: 20 Nov 2025
Net transaction value: $0
SEC form: 3
Accepted by SEC: 01 Dec 2025, 17:40:33 UTC
Source filing: View source filing
Reporting owner signature: /s/ Andrea M. Newburn, Attorney-in-fact

Key filing fact

COLUMBIA BANKING SYSTEM, INC. filed Form 3 for COLUMBIA BANKING SYSTEM, INC. (COLB) on 01 Dec 2025.

Key facts

This page summarizes COLUMBIA BANKING SYSTEM, INC.'s Form 3 filing for COLUMBIA BANKING SYSTEM, INC. (COLB).
0 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 01 Dec 2025, 17:40.

Change

No earlier filing in this sequence is available for direct comparison.
Current net transaction value: $0.

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

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0000887343 Primary reporting owner

COLUMBIA BANKING SYSTEM, INC.

Relationship: EVP, Chief Accounting Officer
Address: C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA
Signature: /s/ Andrea M. Newburn, Attorney-in-fact
Signature date: 01 Dec 2025

Reported non-derivative transactions

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

COLB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 10,860
Date: 20 Nov 2025
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

COLB holding Derivative

Restricted Stock Unit

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 20 Nov 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 5,055
Exercise price
Footnotes: F1, F2

COLB holding Derivative

Performance Restricted Stock Unit

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 20 Nov 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 6,312
Exercise price
Footnotes: F3, F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

2,537 restricted stock units granted 02/25/2025. The grant will vest 33.33% per year over three years.

Footnote F2

2,518 restricted stock units granted 03/01/2024. The grant will vest 33.33% per year over two years.

Footnote F3

2,536 performance-based restricted stock units granted 02/25/2025. The grant will vest approximately three years following the grant date based on the issuer's relative total shareholder return and return on tangible common equity for fiscal years 2025-2027 compared to a group of peer companies approved by the issuer's compensation committee.

Footnote F4

3,776 performance-based restricted stock units granted 03/01/2024. The grant will vest approximately three years following the grant date based on the issuer's relative total shareholder return performance and return on tangible common equity for fiscal years 2024-2026 compared to a group of peer companies approved by the issuer's compensation committee.