Insider Stock Trading History of Lee John Tseng-chung


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 Lee John Tseng-chung since year 2005. The trader's CIK number is 1414656. At the time of this reporting, Lee John Tseng-chung is the Sr. VP & COO 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 Lee John Tseng-chung since 2005.
  Trade Date   Symbol Company Name (Issuer) Trade Type     Shares       Price ($)   Value ($)
2017-11-13 MKSI Mks Instruments Inc Sale 2,113 104.02 219,783
2017-05-11 MKSI Mks Instruments Inc Option Ex 3,557 .00 0
2017-02-22 MKSI Mks Instruments Inc Sale 14,734 67.99 1,001,764
2017-02-15 MKSI Mks Instruments Inc Option Ex 16,083 .00 0
2017-02-10 MKSI Mks Instruments Inc Option Ex 7,175 .00 0
2016-08-10 MKSI Mks Instruments Inc Sale 9,955 46.36 461,523
2016-02-26 MKSI Mks Instruments Inc Sale 994 32.70 32,503
2016-02-25 MKSI Mks Instruments Inc Option Ex 4,967 .00 0
2016-02-10 MKSI Mks Instruments Inc Option Ex 7,174 .00 0
2016-02-11 MKSI Mks Instruments Inc Sale 1,435 31.96 45,862
2015-05-14 MKSI Mks Instruments Inc Sale 10,747 36.36 390,750
2015-02-25 MKSI Mks Instruments Inc Option Ex 4,968 .00 0
2015-02-23 MKSI Mks Instruments Inc Option Ex 3,272 .00 0
2015-02-10 MKSI Mks Instruments Inc Option Ex 7,173 .00 0
2014-06-13 MKSI Mks Instruments Inc Sale 9,128 29.55 269,695
2014-02-28 MKSI Mks Instruments Inc Option Ex 3,225 .00 0
2014-02-24 MKSI Mks Instruments Inc Option Ex 3,271 .00 0
2014-02-25 MKSI Mks Instruments Inc Option Ex 4,967 .00 0
2013-11-29 MKSI Mks Instruments Inc Buy 443 23.96 10,615
2013-05-31 MKSI Mks Instruments Inc Buy 520 20.42 10,616
2013-03-14 MKSI Mks Instruments Inc Sale 8,160 27.64 225,501
2013-03-04 MKSI Mks Instruments Inc Option Ex 4,897 .00 0
2013-02-28 MKSI Mks Instruments Inc Option Ex 3,224 .00 0
2013-02-25 MKSI Mks Instruments Inc Option Ex 3,270 .00 0
2012-11-30 MKSI Mks Instruments Inc Buy 479 20.61 9,873
2012-08-06 MKSI Mks Instruments Inc Sale 2,868 26.67 76,498
2012-03-16 MKSI Mks Instruments Inc Option Ex 3,501 .00 0
2012-03-09 MKSI Mks Instruments Inc Sale 8,595 29.13 250,337
2012-03-05 MKSI Mks Instruments Inc Option Ex 4,895 .00 0
2012-02-28 MKSI Mks Instruments Inc Option Ex 6,974 .00 0
2011-11-08 MKSI Mks Instruments Inc Sale 3,140 27.56 86,544
2011-10-10 MKSI Mks Instruments Inc Option Ex 3,750 .00 0
2011-03-17 MKSI Mks Instruments Inc Sale 4,449 29.31 130,382
2011-03-16 MKSI Mks Instruments Inc Option Ex 3,500 .00 0
2011-03-10 MKSI Mks Instruments Inc Option Ex 3,530 .00 0
2011-03-08 MKSI Mks Instruments Inc Sale 6,129 31.82 195,024
2011-03-04 MKSI Mks Instruments Inc Option Ex 4,896 .00 0
2011-02-28 MKSI Mks Instruments Inc Option Ex 3,750 .00 0
2010-11-05 MKSI Mks Instruments Inc Sale 2,374 21.60 51,278
2010-10-08 MKSI Mks Instruments Inc Option Ex 3,750 .00 0
2010-04-26 MKSI Mks Instruments Inc Sale 6,623 24.15 159,945
2010-03-16 MKSI Mks Instruments Inc Option Ex 3,499 .00 0
2010-03-10 MKSI Mks Instruments Inc Option Ex 3,528 .00 0
2010-03-01 MKSI Mks Instruments Inc Option Ex 3,750 .00 0
2010-02-11 MKSI Mks Instruments Inc Sale 2,409 18.74 45,144
2009-10-08 MKSI Mks Instruments Inc Option Ex 3,750 .00 0
2009-07-28 MKSI Mks Instruments Inc Sale 6,187 19.13 118,357
2009-03-10 MKSI Mks Instruments Inc Option Ex 3,529 .00 0
2009-03-02 MKSI Mks Instruments Inc Option Ex 3,750 .00 0
2009-03-02 MKSI Mks Instruments Inc Sale 1,574 11.89 18,714
2008-10-08 MKSI Mks Instruments Inc Option Ex 3,750 16.84 63,150

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 Lee John Tseng-chung (Sr. VP & COO of Mks Instruments Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.