Drew K. Anderson - 01 Mar 2024 Form 4 Insider Report for COLUMBIA BANKING SYSTEM, INC. (COLB)

Role: Chief Administrative Officer
Signature: /s/ Lisa M. White, Attorney-in-fact
Issuer symbol: COLB
Transactions as of: 01 Mar 2024
Net transactions value: +$399,948
Form type: 4
Filing time: 04 Mar 2024, 19:34:58 UTC
Previous filing: 01 Mar 2024
Next filing: 12 Mar 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	COLB	Common Stock	Award	$199,983	+11,191	+66%	$17.87	28,171	01 Mar 2024	Direct	F1

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	Performance Restricted Stock Unit	Award	$99,983	+5,595		$17.87	5,595	01 Mar 2024	Common Stock	5,595		Direct	F2
transaction	COLB	Performance Restricted Stock Unit	Award	$99,983	+5,595	+100%	$17.87	11,190	01 Mar 2024	Common Stock	5,595		Direct	F3

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

Explanation of Responses:

Id	Content
F1	Restricted stock units granted 03/01/2024. Beginning on the first anniversary of the grant date, the grant will vest 33.33% per year for three years.
F2	Performance 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 for fiscal years 2024-2026 compared to a Compensation Committee approved group of peers.
F3	Performance restricted stock units granted 03/01/2024. The grant will vest approximately three years following the grant date based on the issuer's relative return on tangible common equity for fiscal years 2024-2026 compared to a Compensation Committee approved group of peers.