Luis Machuca - 29 Jul 2025 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Role
Director
Signature
/s/ Lisa M. White, Attorney-in-fact
Issuer symbol
COLB
Transactions as of
29 Jul 2025
Net transactions value
+$16,586
Form type
4
Filing time
31 Jul 2025, 16:34:59 UTC
Previous filing
03 Jun 2025
Next filing
08 Oct 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
MACHUCA LUIS Director C/O COLUMBIA BANKING SYSTEM, INC., 1301 A STREET, TACOMA /s/ Lisa M. White, Attorney-in-fact 31 Jul 2025 0001133099

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction COLB Deferred Compensation Phantom Stock Award $16,586 +668 +1.5% $24.83 46,487 29 Jul 2025 Common 668 Deferred Compensation F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The deferred compensation plan phantom stock was accrued under the Registrant's deferred compensation plan and will be paid in accordance with the terms of the deferred compensation plan following end of the reporting person's employment with the Registrant.