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Stock Trading History of Dalla Betta Ralph A

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 Dalla Betta Ralph A since year 2005. The trader's CIK number is 1218794. At the time of this reporting, Dalla Betta Ralph A is the Chief Technology Officer of Catalytica Energy Systems Inc (stock ticker symbol CESI).

Stock purchases, sales, and option exercises reported by *Dalla Betta Ralph A* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2006-07-07	CESI	Catalytica Energy Systems Inc	Option Exercise	25,000	.40	10,000
2005-06-14	CESI	Catalytica Energy Systems Inc	Sale	26,900	1.86	50,114

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 Dalla Betta Ralph A (Chief Technology Officer of Catalytica Energy Systems Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.