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

Role
EVP Chief Marketing Officer
Signature
/s/ Andrea M. Newburn, Attorney-in-fact
Issuer symbol
COLB
Transactions as of
20 Jan 2026
Net transactions value
-$17,804
Form type
4
Filing time
22 Jan 2026, 18:11:48 UTC
Previous filing
04 Mar 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Moore Devine David EVP Chief Marketing Officer C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA /s/ Andrea M. Newburn, Attorney-in-fact 22 Jan 2026 0001798077

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction COLB Common Stock Disposed to Issuer $0 -260 -1.1% $0.000000 22,765 20 Jan 2026 Direct F1
transaction COLB Common Stock Tax liability $17,804 -628 -2.8% $28.35 22,137 20 Jan 2026 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.
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.