Stock Trading History of Berlinghieri Leo

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 Berlinghieri Leo since year 2005. The trader's CIK number is 1202738. At the time of this reporting, Berlinghieri Leo is the President and CEO of Mks Instruments Inc . (stock ticker symbol MKSI). See this page for all insider trading activities at Mks Instruments Inc .

Stock purchases, sales, and option exercises reported by insider *Berlinghieri Leo* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-04-29	MKSI	Mks Instruments Inc	Sale	60,000	24.07	1,444,200
2008-04-29	MKSI	Mks Instruments Inc	Option Exercise	60,000	.00	0
2008-03-01	MKSI	Mks Instruments Inc	Option Exercise	11,043	.00	0
2006-08-08	MKSI	Mks Instruments Inc	Sale	20,000	19.82	396,400
2006-08-08	MKSI	Mks Instruments Inc	Option Exercise	20,000	4.43	88,600

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 Berlinghieri Leo (President and CEO of Mks Instruments Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.