Stock Trading History of Collins John C

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 Collins John C since year 2005. The trader's CIK number is 1164293. At the time of this reporting, Collins John C is the CFO and Executive VP of Constellation Energy Group Inc . (stock ticker symbol CEG). See this page for all insider trading activities at Constellation Energy Group Inc .

Stock purchases, sales, and option exercises reported by insider *Collins John C* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-05-12	CEG	Constellation Energy Group Inc	Sale	5,000	81.60	407,996
2008-05-12	CEG	Constellation Energy Group Inc	Option Exercise	5,000	31.21	156,050
2008-02-01	CEG	Constellation Energy Group Inc	Option Exercise	10,000	31.21	312,100
2008-02-01	CEG	Constellation Energy Group Inc	Sale	10,000	94.58	945,817
2007-12-06	CEG	Constellation Energy Group Inc	Sale	10,000	100.87	1,008,699
2007-12-06	CEG	Constellation Energy Group Inc	Option Exercise	10,000	31.21	312,100
2006-11-29	CEG	Constellation Energy Group Inc	Option Exercise	23,290	28.81	670,984
2006-11-29	CEG	Constellation Energy Group Inc	Sale	23,290	67.46	1,571,038

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 Collins John C (CFO and Executive VP of Constellation Energy Group Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.