The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) by Stewart William D since 2006.
The trader's CIK number is 1202731.
At the time of the last reporting, Stewart William D was the V.P. Vacuum Products of Mks Instruments Inc. (stock ticker symbol MKSI).
Also see all insider trading activities at Mks Instruments Inc.
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2012 | MKSI | 0 | $0 | 188 | $6,012 | 22,153 | $0 |
| 2011 | MKSI | 0 | $0 | 32,575 | $912,637 | 36,448 | $650,640 |
| 2010 | MKSI | 0 | $0 | 8,914 | $173,823 | 12,410 | $27,600 |
| 2009 | MKSI | 0 | $0 | 14,084 | $266,963 | 7,174 | $0 |
| 2008 | MKSI | 0 | $0 | 7,500 | $192,300 | 11,286 | $110,400 |
| 2007 | MKSI | 0 | $0 | 195,000 | $5,327,606 | 195,000 | $4,220,246 |
| 2006 | MKSI | 0 | $0 | 56,172 | $1,340,263 | 56,172 | $1,013,230 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2012-04-02 | MKSI | Option Ex | 11,629 | .00 | 0 |
| 2012-03-16 | MKSI | Option Ex | 3,360 | .00 | 0 |
| 2012-03-05 | MKSI | Option Ex | 4,700 | .00 | 0 |
| 2012-02-28 | MKSI | Option Ex | 2,464 | .00 | 0 |
| 2012-02-13 | MKSI | Sale | 188 | 31.98 | 6,012 |
| 2011-08-09 | MKSI | Sale | 8,575 | 22.46 | 192,637 |
| 2011-05-03 | MKSI | Option Ex | 1,000 | .00 | 0 |
| 2011-03-16 | MKSI | Option Ex | 3,360 | .00 | 0 |
| 2011-03-10 | MKSI | Option Ex | 3,388 | .00 | 0 |
| 2011-03-04 | MKSI | Option Ex | 4,700 | .00 | 0 |
| 2011-02-10 | MKSI | Option Ex | 24,000 | 27.11 | 650,640 |
| 2011-02-10 | MKSI | Sale | 24,000 | 30.00 | 720,000 |
| 2010-03-25 | MKSI | Option Ex | 1,875 | 14.72 | 27,600 |
| 2010-03-25 | MKSI | Sale | 8,914 | 19.50 | 173,823 |
| 2010-03-16 | MKSI | Option Ex | 3,360 | .00 | 0 |
| 2010-03-10 | MKSI | Option Ex | 3,388 | .00 | 0 |
| 2010-03-01 | MKSI | Option Ex | 3,787 | .00 | 0 |
| 2009-08-03 | MKSI | Sale | 12,906 | 19.60 | 252,957 |
| 2009-03-10 | MKSI | Option Ex | 3,388 | .00 | 0 |
| 2009-03-02 | MKSI | Option Ex | 3,786 | .00 | 0 |
| 2009-03-02 | MKSI | Sale | 1,178 | 11.89 | 14,006 |
| 2008-05-19 | MKSI | Option Ex | 7,500 | 14.72 | 110,400 |
| 2008-05-19 | MKSI | Sale | 7,500 | 25.64 | 192,300 |
| 2008-03-01 | MKSI | Option Ex | 3,786 | .00 | 0 |
| 2007-06-11 | MKSI | Option Ex | 133 | 24.50 | 3,258 |
| 2007-06-11 | MKSI | Sale | 133 | 27.40 | 3,644 |
| 2007-06-04 | MKSI | Sale | 7,448 | 27.40 | 204,075 |
| 2007-06-01 | MKSI | Sale | 15,990 | 27.42 | 438,445 |
| 2007-06-04 | MKSI | Option Ex | 7,448 | 24.50 | 182,476 |
| 2007-06-01 | MKSI | Option Ex | 15,990 | 24.50 | 391,755 |
| 2007-05-31 | MKSI | Option Ex | 20,000 | 24.50 | 490,000 |
| 2007-05-31 | MKSI | Sale | 20,000 | 27.21 | 544,200 |
| 2007-05-22 | MKSI | Option Ex | 17,825 | 24.00 | 427,800 |
| 2007-05-22 | MKSI | Sale | 17,825 | 27.05 | 482,166 |
| 2007-05-21 | MKSI | Option Ex | 23,050 | 20.11 | 463,650 |
| 2007-05-21 | MKSI | Sale | 23,050 | 27.10 | 624,655 |
| 2007-05-07 | MKSI | Option Ex | 1,972 | 24.50 | 48,314 |
| 2007-05-07 | MKSI | Sale | 1,972 | 27.60 | 54,427 |
| 2007-05-04 | MKSI | Option Ex | 24,557 | 24.50 | 601,646 |
| 2007-05-04 | MKSI | Sale | 24,557 | 27.60 | 677,773 |
| 2007-05-02 | MKSI | Sale | 55,900 | 27.60 | 1,542,840 |
| 2007-05-02 | MKSI | Option Ex | 55,900 | 19.90 | 1,112,410 |
| 2007-04-16 | MKSI | Option Ex | 28,125 | 17.74 | 498,937 |
| 2007-04-16 | MKSI | Sale | 28,125 | 26.86 | 755,381 |
| 2006-04-19 | MKSI | Option Ex | 56,172 | 18.04 | 1,013,230 |
| 2006-04-19 | MKSI | 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.