<SEC-DOCUMENT>0001193125-21-249194-index.html : 20210817 <SEC-HEADER>0001193125-21-249194.hdr.sgml : 20210817 <ACCEPTANCE-DATETIME>20210817162926 ACCESSION NUMBER: 0001193125-21-249194 CONFORMED SUBMISSION TYPE: 424B3 PUBLIC DOCUMENT COUNT: 3 FILED AS OF DATE: 20210817 DATE AS OF CHANGE: 20210817 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: 333-258551 FILM NUMBER: 211183110 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>d190993d424b3.htm <DESCRIPTION>424B3 <TEXT> Document 1 - file: d190993d424b3.htm
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</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>g190993g66a96.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: g190993g66a96.jpg
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