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Stock Trading History of Roberts Kent

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Roberts Kent since year 2005. The trader's CIK number is 1397948. At the time of this reporting, Roberts Kent is the Executive Vice President of Columbia Banking System Inc . (stock ticker symbol COLB). See this page for all insider trading activities at Columbia Banking System Inc .

Stock purchases, sales, and option exercises reported by insider *Roberts Kent* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-11-26	COLB	Columbia Banking System Inc	Purchase	2,625	9.57	25,126
2008-08-06	COLB	Columbia Banking System Inc	Purchase	1,500	15.30	22,950
2008-01-09	COLB	Columbia Banking System Inc	Purchase	312	26.40	8,235
2007-07-03	COLB	Columbia Banking System Inc	Purchase	313	26.32	8,239

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Roberts Kent (Executive Vice President of Columbia Banking System Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.