Luis Machuca - May 10, 2024 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Role: Director
Signature: /s/ Lisa M. White, Attorney-in-fact
Stock symbol: COLB
Transactions as of: May 10, 2024
Transactions value $: $0
Form type: 4
Date filed: 5/14/2024, 05:40 PM
Previous filing: Feb 1, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	COLB	Common Stock	Award	$0	+4.18K	+22.69%	$0.00	22.6K	May 10, 2024	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	42,849 of the 61,288 shares previously reported as directly held by the reporting person are in respect of deferred compensation plan obligations that were previously inadvertently disclosed as held directly by the reporting person. The reporting person directly holds 22,622 shares of Common Stock and holds 42,849 shares of Deferred Compensation Phantom Stock in the Registrant's deferred compensation plan. Such Deferred Compensation Phantom Stock shall be paid in accordance with the terms of the deferred compensation plan following the end of the reporting person's employment with the Registrant.

Content

42,849 of the 61,288 shares previously reported as directly held by the reporting person are in respect of deferred compensation plan obligations that were previously inadvertently disclosed as held directly by the reporting person. The reporting person directly holds 22,622 shares of Common Stock and holds 42,849 shares of Deferred Compensation Phantom Stock in the Registrant's deferred compensation plan. Such Deferred Compensation Phantom Stock shall be paid in accordance with the terms of the deferred compensation plan following the end of the reporting person's employment with the Registrant.