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Stock Trading History of Williams David R

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 Williams David R since year 2005. The trader's CIK number is 1383905. At the time of this reporting, Williams David R is the Vice President of Northwest Natural Gas Co . (stock ticker symbol NWN). See this page for all insider trading activities at Northwest Natural Gas Co .

Stock purchases, sales, and option exercises reported by insider *Williams David R* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-09-11	NWN	Northwest Natural Gas Co	Sale	5,500	49.82	273,992
2008-09-11	NWN	Northwest Natural Gas Co	Option Exercise	5,500	28.82	158,510
2007-11-12	NWN	Northwest Natural Gas Co	Sale	1,500	48.62	72,930
2007-11-12	NWN	Northwest Natural Gas Co	Option Exercise	1,500	27.88	41,812

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 Williams David R (Vice President of Northwest Natural Gas Co at the time of this reporting) see the Securities and Exchange Commission (SEC) website.