Stock Trading History of Gleeson Christopher M

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 Gleeson Christopher M since year 2005. The trader's CIK number is 1134540. At the time of this reporting, Gleeson Christopher M is the President & CEO of Ventana Medical Systems Inc (stock ticker symbol VMSI).

Stock purchases, sales, and option exercises reported by insider *Gleeson Christopher M* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-02-07	VMSI	Ventana Medical Systems Inc	Option Exercise	516,305	89.40	46,157,667
2008-01-28	VMSI	Ventana Medical Systems Inc	Option Exercise	11,104	10.09	112,039
2007-02-13	VMSI	Ventana Medical Systems Inc	Option Exercise	20,000	259.43	5,188,557
2006-12-15	VMSI	Ventana Medical Systems Inc	Option Exercise	20,598	8.84	182,168
2006-04-28	VMSI	Ventana Medical Systems Inc	Sale	80,000	45.03	3,602,440
2006-04-28	VMSI	Ventana Medical Systems Inc	Option Exercise	80,000	8.94	715,040

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 Gleeson Christopher M (President & CEO of Ventana Medical Systems Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.