Stock Trading History of Grogan Thomas

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 Grogan Thomas since year 2005. The trader's CIK number is 1134547. At the time of this reporting, Grogan Thomas is the SVP, Medical Affairs & Founder of Ventana Medical Systems Inc (stock ticker symbol VMSI).

Stock purchases, sales, and option exercises reported by *Grogan Thomas* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-01-28	VMSI	Ventana Medical Systems Inc	Option Exercise	20,318	13.93	283,095
2006-11-15	VMSI	Ventana Medical Systems Inc	Sale	22,000	43.25	951,500
2006-05-09	VMSI	Ventana Medical Systems Inc	Option Exercise	36,255	12.47	452,063
2006-03-14	VMSI	Ventana Medical Systems Inc	Sale	8,000	39.08	312,628
2005-03-09	VMSI	Ventana Medical Systems Inc	Sale	12,267	69.00	846,423

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 Grogan Thomas (SVP, Medical Affairs & Founder of Ventana Medical Systems Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.