<SEC-DOCUMENT>0001193125-17-018888-index.html : 20170126
<SEC-HEADER>0001193125-17-018888.hdr.sgml : 20170126
<ACCEPTANCE-DATETIME>20170126080838
ACCESSION NUMBER:		0001193125-17-018888
CONFORMED SUBMISSION TYPE:	425
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20170126
DATE AS OF CHANGE:		20170126

SUBJECT COMPANY:	

	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:		425
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20288
		FILM NUMBER:		17548079

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PACIFIC CONTINENTAL CORP
		CENTRAL INDEX KEY:			0001084717
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				930606433
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		425

	BUSINESS ADDRESS:	
		STREET 1:		111 WEST 7TH ST
		CITY:			EUGENE
		STATE:			OR
		ZIP:			97401
		BUSINESS PHONE:		5416868685

	MAIL ADDRESS:	
		STREET 1:		111 WEST 7TH ST
		CITY:			EUGENE
		STATE:			OR
		ZIP:			97401
</SEC-HEADER>
<DOCUMENT>
<TYPE>425
<SEQUENCE>1
<FILENAME>d237330d8k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: d237330d8k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d237330dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: d237330dex991.htm

</DOCUMENT>
</SEC-DOCUMENT>