COLUMBIA BANKING SYSTEM, INC. — Director's Dealing 2011

Jul 5, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COLUMBIA BANKING SYSTEM INC (COLB)
CIK: 0000887343
Period of Report: 2011-07-01

Reporting Person: DRESSEL MELANIE J (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-07-01	Common Stock	A	1155	$15.498	Acquired	61600	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2408	Indirect
Common Stock	7744	Indirect
Common Stock	51134	Indirect

Footnotes

F1: ESPP Purchase