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Stock Trading History of Olson John L

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 Olson John L since year 2005. The trader's CIK number is 1195492. At the time of this reporting, Olson John L is the of Mdu Resources Group Inc . (stock ticker symbol MDU). See this page for all insider trading activities at Mdu Resources Group Inc .

Stock purchases, sales, and option exercises reported by insider *Olson John L* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-05-15	MDU	Mdu Resources Group Inc	Option Exercise	5,062	10.36	52,448
2007-11-14	MDU	Mdu Resources Group Inc	Option Exercise	5,062	10.26	51,932

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 Olson John L ( of Mdu Resources Group Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.