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Stock Trading History of Kobayashi Katsuhiko

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 Kobayashi Katsuhiko since year 2005. The trader's CIK number is 1049647. At the time of this reporting, Kobayashi Katsuhiko is the Director of Oyo Geospace Corp (stock ticker symbol OYOG).

Stock purchases, sales, and option exercises reported by *Kobayashi Katsuhiko* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-03-06	OYOG	Oyo Geospace Corp	Purchase	9,450	68.74	649,593
2007-02-14	OYOG	Oyo Geospace Corp	Purchase	31,500	68.50	2,157,750
2005-08-12	OYOG	Oyo Geospace Corp	Sale	1,400,000	18.50	25,900,000

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 Kobayashi Katsuhiko (Director of Oyo Geospace Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.