<SEC-DOCUMENT>0000887343-17-000152-index.html : 20171020 <SEC-HEADER>0000887343-17-000152.hdr.sgml : 20171020 <ACCEPTANCE-DATETIME>20171020133157 ACCESSION NUMBER: 0000887343-17-000152 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 3 CONFORMED PERIOD OF REPORT: 20171019 ITEM INFORMATION: Other Events ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20171020 DATE AS OF CHANGE: 20171020 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: 171146653 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>form8-kcolb3q2017dividend.htm <DESCRIPTION>8-K <TEXT> Document 1 - file: form8-kcolb3q2017dividend.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.1 <SEQUENCE>2 <FILENAME>ex991-dividendrelease3q2017.htm <DESCRIPTION>PRESS RELEASE ANNOUNCING QUARTERLY CASH DIVIDEND <TEXT> Document 2 - file: ex991-dividendrelease3q2017.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>logoa05.jpg <DESCRIPTION>LOGO <TEXT> Document 3 - file: logoa05.jpg
</DOCUMENT> </SEC-DOCUMENT>