Stock Trading History of Kummer Raymond B

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 Kummer Raymond B since year 2005. The trader's CIK number is 1166982. At the time of this reporting, Kummer Raymond B is the CTO & VP of Cogent Communications Group Inc . (stock ticker symbol COI). See this page for all insider trading activities at Cogent Communications Group Inc .

Stock purchases, sales, and option exercises reported by insider *Kummer Raymond B* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-03-04	CCOI	Cogent Communications Group Inc	Option Exercise	18,800	2.44	45,872
2007-05-29	CCOI	Cogent Communications Group Inc	Sale	5,000	26.25	131,250
2007-03-16	CCOI	Cogent Communications Group Inc	Sale	7,462	23.75	177,222
2007-03-19	CCOI	Cogent Communications Group Inc	Sale	2,500	24.50	61,250
2006-03-22	CCOI	Cogent Communications Group Inc	Sale	4,000	9.00	36,000

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 Kummer Raymond B (CTO & VP of Cogent Communications Group Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.