<SEC-DOCUMENT>0001193125-21-245789-index.html : 20210813
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<ACCEPTANCE-DATETIME>20210813132623
ACCESSION NUMBER:		0001193125-21-245789
CONFORMED SUBMISSION TYPE:	S-4/A
PUBLIC DOCUMENT COUNT:		12
FILED AS OF DATE:		20210813
DATE AS OF CHANGE:		20210813

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:		S-4/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-258551
		FILM NUMBER:		211171184

	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
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Document 1 - file: d190993ds4a.htm

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Document 2 - file: d190993dex81.htm

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<FILENAME>d190993dex82.htm
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Document 3 - file: d190993dex82.htm

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<FILENAME>d190993dex233.htm
<DESCRIPTION>EX-23.3
<TEXT>
Document 4 - file: d190993dex233.htm

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<DESCRIPTION>EX-23.4
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Document 5 - file: d190993dex234.htm

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Document 6 - file: d190993dex992.htm

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Document 7 - file: g190993g0812210244036.jpg

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Document 8 - file: g190993g39g99.jpg

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Document 9 - file: g190993g52e89.jpg

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Document 10 - file: g190993g83b41.jpg

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Document 11 - file: g190993jg1.jpg

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Document 12 - file: g190993jg2.jpg

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