FORM 10-Q

Company

COLUMBIA BANKING SYSTEM, INC.

Filed

May 7, 2012

Period of Report

March 31, 2012

Accession Number

0000887343-12-000020

A 10-Q is a quarterly financial report filed after each of the first three quarters of a fiscal year. It includes unaudited financial statements and management commentary. Learn more about 10-Q filings →