<SEC-DOCUMENT>0000887343-24-000272-index.html : 20241220
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<ACCEPTANCE-DATETIME>20241220163111
ACCESSION NUMBER:		0000887343-24-000272
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		16
FILED AS OF DATE:		20241220
DATE AS OF CHANGE:		20241220
EFFECTIVENESS DATE:		20241220

FILER:

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

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-283985
		FILM NUMBER:		241568414

	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>
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<TYPE>S-3ASR
<SEQUENCE>1
<FILENAME>columbia-formsx32024.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: columbia-formsx32024.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>ex51s-3dec2024sx3xvalidity.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: ex51s-3dec2024sx3xvalidity.htm

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<DOCUMENT>
<TYPE>EX-5.2
<SEQUENCE>3
<FILENAME>ex52s-3dec2024sx3xvalidity.htm
<DESCRIPTION>EX-5.2
<TEXT>
Document 3 - file: ex52s-3dec2024sx3xvalidity.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.3
<SEQUENCE>4
<FILENAME>ex233-dec2024sx3xdtconsent.htm
<DESCRIPTION>EX-23.3
<TEXT>
Document 4 - file: ex233-dec2024sx3xdtconsent.htm

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<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>5
<FILENAME>exfilingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
Document 5 - file: exfilingfees.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 7 - file: R1.htm

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<TYPE>XML
<SEQUENCE>8
<FILENAME>R2.htm
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<TEXT>
Document 8 - file: R2.htm

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<TYPE>XML
<SEQUENCE>9
<FILENAME>R3.htm
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<TEXT>
Document 9 - file: R3.htm

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<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>10
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 10 - file: Financial_Report.xlsx

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<TYPE>XML
<SEQUENCE>11
<FILENAME>Show.js
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<TEXT>
Document 11 - file: Show.js

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<TYPE>XML
<SEQUENCE>12
<FILENAME>report.css
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<TEXT>
Document 12 - file: report.css

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<TYPE>XML
<SEQUENCE>14
<FILENAME>FilingSummary.xml
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<TEXT>
Document 14 - file: FilingSummary.html

Document 14 - RAW XML: FilingSummary.xml

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<TYPE>JSON
<SEQUENCE>16
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 16 - file: MetaLinks.json

</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>17
<FILENAME>0000887343-24-000272-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 17 - file: 0000887343-24-000272-xbrl.zip

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>18
<FILENAME>exfilingfees_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 18 - file: exfilingfees_htm.html

Document 18 - RAW XML: exfilingfees_htm.xml

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