<SEC-DOCUMENT>0000887343-25-000277-index.html : 20251201
<SEC-HEADER>0000887343-25-000277.hdr.sgml : 20251201
<ACCEPTANCE-DATETIME>20251201200341
ACCESSION NUMBER:		0000887343-25-000277
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20251120
FILED AS OF DATE:		20251201
DATE AS OF CHANGE:		20251201

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lakely Brock
		CENTRAL INDEX KEY:			0001740374
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20288
		FILM NUMBER:		251541305

	MAIL ADDRESS:	
		STREET 1:		C/O COLUMBIA BANKING SYSTEM, INC.
		STREET 2:		1301 A STREET
		CITY:			TACOMA
		STATE:			WA
		ZIP:			98402

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLUMBIA BANKING SYSTEM, INC.
		CENTRAL INDEX KEY:			0000887343
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		EIN:				911422237
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1301 A STREET
		CITY:			TACOMA
		STATE:			WA
		ZIP:			98402
		BUSINESS PHONE:		2533051900

	MAIL ADDRESS:	
		STREET 1:		1301 A STREET
		CITY:			TACOMA
		STATE:			WA
		ZIP:			98402

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COLUMBIA BANKING SYSTEM INC
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>wk-form3_1764637417.xml
<DESCRIPTION>FORM 3
<TEXT>
Document 1 - file: wk-form3_1764637417.html

Document 1 - RAW XML: wk-form3_1764637417.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>a2025-11x20powerofattorn.htm
<DESCRIPTION>EX-24
<TEXT>
Document 2 - file: a2025-11x20powerofattorn.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>a2025-11x20powerofattorn001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: a2025-11x20powerofattorn001.jpg

</DOCUMENT>
</SEC-DOCUMENT>