Insider Stock Trading History of Stewart William D


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 Stewart William D since year 2005. The trader's CIK number is 1202731. At the time of this reporting, Stewart William D is the V.P. Vacuum Products 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 Stewart William D since 2005.
  Trade Date   Symbol Company Name (Issuer) Trade Type     Shares       Price ($)   Value ($)
2012-04-02 MKSI Mks Instruments Inc Option Ex 11,629 .00 0
2012-03-16 MKSI Mks Instruments Inc Option Ex 3,360 .00 0
2012-03-05 MKSI Mks Instruments Inc Option Ex 4,700 .00 0
2012-02-28 MKSI Mks Instruments Inc Option Ex 2,464 .00 0
2012-02-13 MKSI Mks Instruments Inc Sale 188 31.98 6,012
2011-08-09 MKSI Mks Instruments Inc Sale 8,575 22.46 192,637
2011-05-03 MKSI Mks Instruments Inc Option Ex 1,000 .00 0
2011-03-16 MKSI Mks Instruments Inc Option Ex 3,360 .00 0
2011-03-10 MKSI Mks Instruments Inc Option Ex 3,388 .00 0
2011-03-04 MKSI Mks Instruments Inc Option Ex 4,700 .00 0
2011-02-10 MKSI Mks Instruments Inc Option Ex 24,000 27.11 650,640
2011-02-10 MKSI Mks Instruments Inc Sale 24,000 30.00 720,000
2010-03-25 MKSI Mks Instruments Inc Option Ex 1,875 14.72 27,600
2010-03-25 MKSI Mks Instruments Inc Sale 8,914 19.50 173,823
2010-03-16 MKSI Mks Instruments Inc Option Ex 3,360 .00 0
2010-03-10 MKSI Mks Instruments Inc Option Ex 3,388 .00 0
2010-03-01 MKSI Mks Instruments Inc Option Ex 3,787 .00 0
2009-08-03 MKSI Mks Instruments Inc Sale 12,906 19.60 252,957
2009-03-10 MKSI Mks Instruments Inc Option Ex 3,388 .00 0
2009-03-02 MKSI Mks Instruments Inc Option Ex 3,786 .00 0
2009-03-02 MKSI Mks Instruments Inc Sale 1,178 11.89 14,006
2008-05-19 MKSI Mks Instruments Inc Option Ex 7,500 14.72 110,400
2008-05-19 MKSI Mks Instruments Inc Sale 7,500 25.64 192,300
2008-03-01 MKSI Mks Instruments Inc Option Ex 3,786 .00 0
2007-06-11 MKSI Mks Instruments Inc Option Ex 133 24.50 3,258
2007-06-11 MKSI Mks Instruments Inc Sale 133 27.40 3,644
2007-06-04 MKSI Mks Instruments Inc Sale 7,448 27.40 204,075
2007-06-01 MKSI Mks Instruments Inc Sale 15,990 27.42 438,445
2007-06-04 MKSI Mks Instruments Inc Option Ex 7,448 24.50 182,476
2007-06-01 MKSI Mks Instruments Inc Option Ex 15,990 24.50 391,755
2007-05-31 MKSI Mks Instruments Inc Option Ex 20,000 24.50 490,000
2007-05-31 MKSI Mks Instruments Inc Sale 20,000 27.21 544,200
2007-05-22 MKSI Mks Instruments Inc Option Ex 17,825 24.00 427,800
2007-05-22 MKSI Mks Instruments Inc Sale 17,825 27.05 482,166
2007-05-21 MKSI Mks Instruments Inc Option Ex 23,050 20.12 463,650
2007-05-21 MKSI Mks Instruments Inc Sale 23,050 27.10 624,655
2007-05-07 MKSI Mks Instruments Inc Option Ex 1,972 24.50 48,314
2007-05-07 MKSI Mks Instruments Inc Sale 1,972 27.60 54,427
2007-05-04 MKSI Mks Instruments Inc Option Ex 24,557 24.50 601,646
2007-05-04 MKSI Mks Instruments Inc Sale 24,557 27.60 677,773
2007-05-02 MKSI Mks Instruments Inc Sale 55,900 27.60 1,542,840
2007-05-02 MKSI Mks Instruments Inc Option Ex 55,900 19.90 1,112,410
2007-04-16 MKSI Mks Instruments Inc Option Ex 28,125 17.74 498,937
2007-04-16 MKSI Mks Instruments Inc Sale 28,125 26.86 755,381
2006-04-19 MKSI Mks Instruments Inc Option Ex 56,172 18.04 1,013,230
2006-04-19 MKSI Mks Instruments Inc Sale 56,172 23.86 1,340,263

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 Stewart William D (V.P. Vacuum Products of Mks Instruments Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.