<SEC-DOCUMENT>0000887343-18-000083-index.html : 20180427 <SEC-HEADER>0000887343-18-000083.hdr.sgml : 20180427 <ACCEPTANCE-DATETIME>20180426183243 ACCESSION NUMBER: 0000887343-18-000083 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 3 CONFORMED PERIOD OF REPORT: 20180426 ITEM INFORMATION: Results of Operations and Financial Condition ITEM INFORMATION: Other Events ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20180427 DATE AS OF CHANGE: 20180426 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: 8-K SEC ACT: 1934 Act SEC FILE NUMBER: 000-20288 FILM NUMBER: 18780164 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 </SEC-HEADER> <DOCUMENT> <TYPE>8-K <SEQUENCE>1 <FILENAME>colb1q2018form8-k.htm <DESCRIPTION>8-K <TEXT> Document 1 - file: colb1q2018form8-k.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.1 <SEQUENCE>2 <FILENAME>a991colb1q2018earningsrele.htm <DESCRIPTION>PRESS RELEASE - EARNINGS AND DIVIDEND <TEXT> Document 2 - file: a991colb1q2018earningsrele.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>cbsystemsolidbuga04.jpg <DESCRIPTION>LOGO <TEXT> Document 3 - file: cbsystemsolidbuga04.jpg
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