Stock Trading History of Chute Richard S

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 Chute Richard S since year 2005. The trader's CIK number is 1202741. At the time of this reporting, Chute Richard S is the Director 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 *Chute Richard S* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-05-06	MKSI	Mks Instruments Inc	Sale	4,000	23.37	93,480
2008-05-04	MKSI	Mks Instruments Inc	Option Exercise	4,000	.00	0
2007-04-30	MKSI	Mks Instruments Inc	Sale	6,905	27.28	188,333
2007-04-30	MKSI	Mks Instruments Inc	Option Exercise	6,905	11.20	77,336
2006-02-21	MKSI	Mks Instruments Inc	Sale	7,687	22.90	176,032
2006-02-21	MKSI	Mks Instruments Inc	Option Exercise	7,687	4.43	34,053

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 Chute Richard S (Director of Mks Instruments Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.