<SEC-DOCUMENT>0001193125-21-347921-index.html : 20211203
<SEC-HEADER>0001193125-21-347921.hdr.sgml : 20211203
<ACCEPTANCE-DATETIME>20211203163319
ACCESSION NUMBER:		0001193125-21-347921
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		6
FILED AS OF DATE:		20211203
DATE AS OF CHANGE:		20211203

FILER:

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

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-261281
		FILM NUMBER:		211470497

	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>424B3
<SEQUENCE>1
<FILENAME>d261205d424b3.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: d261205d424b3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g261205g00m72.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g261205g00m72.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g261205g10y10.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g261205g10y10.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g261205g25l59.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g261205g25l59.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g261205g78w29.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g261205g78w29.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g261205g95l58.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g261205g95l58.jpg

</DOCUMENT>
</SEC-DOCUMENT>