SEC CIK 1202731

STEWART WILLIAM D

Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.

Current Positions

CompanyShares OwnedAs Of
MKSIview stock →18,878.332012-04-02

Position History — MKSI

Reported shares owned immediately after each Form 4 transaction, over time.

022,94545,89068,8352006-022007-042007-052008-052010-032011-052012-04

Recent Filings — MKSI

DateActivitySharesPriceOwned After
2012-04-02Option exercise (derivative)5,592.16—0
2012-04-02Option exercise6,037.1—18,878.33
2012-04-02Option exercise5,592.16—12,841.24
2012-04-02Tax withholding3,617$29.7015,261.33
2012-04-02Grant / award (derivative)1,683.5—3,267.79
2012-03-16Option exercise (derivative)1,400—6,037.1
2012-03-16Option exercise (derivative)1,960—5,592.16
2012-03-16Option exercise1,400—8,295.08
2012-03-16Option exercise1,960—6,895.08
2012-03-16Tax withholding1,046$29.607,249.08
2012-03-05Option exercise (derivative)2,000—7,437.1
2012-03-05Option exercise (derivative)2,700—7,552.16
2012-03-05Option exercise2,000—6,397.08
2012-03-05Option exercise2,700—4,397.08
2012-03-05Tax withholding1,462$28.464,935.08
2012-02-28Option exercise (derivative)1,446.08—10,252.16
2012-02-28Option exercise (derivative)1,018—9,437.1
2012-02-28Tax withholding767$30.631,697.08
2012-02-28Option exercise1,018—2,464.08
2012-02-28Option exercise1,446.08—1,446.08
2012-02-27J (derivative)122.2—12,020.44
2012-02-27J (derivative)122.2—11,898.24
2012-02-13Open-market sale188$31.980.55
2011-08-09Open-market sale8,575$22.470
2011-05-03Option exercise (derivative)1,000—10,455.1
2011-05-03Option exercise1,000—8,886
2011-05-03Tax withholding311$25.858,575
2011-03-16Option exercise (derivative)1,960—12,142.65
2011-03-16Option exercise (derivative)1,400—11,455.1
2011-03-16Option exercise1,400—8,932
2011-03-16Option exercise1,960—7,532
2011-03-16Tax withholding1,046$28.517,886
2011-03-10Option exercise (derivative)2,000—12,855.1
2011-03-10Option exercise (derivative)1,388—14,102.65
2011-03-10Tax withholding1,054$29.535,572
2011-03-10Option exercise2,000—6,626
2011-03-10Option exercise1,388—4,626
2011-03-04Option exercise (derivative)2,700—15,490.65
2011-03-04Option exercise (derivative)2,000—14,855.1
2011-03-04Tax withholding1,462$32.053,238
2011-03-04Option exercise2,000—4,700
2011-03-04Option exercise2,700—2,700
2011-02-28Grant / award (derivative)4,582.65—18,190.65
2011-02-28Grant / award (derivative)3,055.1—16,855.1
2011-02-17J (derivative)100—13,608
2011-02-17J (derivative)200—13,408
2011-02-10Option exercise (derivative)24,000$0.000
2011-02-10Option exercise24,000$27.1124,000
2011-02-10Open-market sale24,000$30.000
2010-05-03Grant / award (derivative)3,000—13,800
2010-03-25Option exercise (derivative)1,875$0.000
2010-03-25Option exercise1,875$14.728,914
2010-03-25Open-market sale8,914$19.500
2010-03-16Option exercise (derivative)1,400$0.0010,800
2010-03-16Option exercise (derivative)1,960$0.0013,708
2010-03-16Option exercise1,400$0.008,085
2010-03-16Option exercise1,960$0.006,685
2010-03-16Tax withholding1,046$19.297,039
2010-03-10Option exercise (derivative)1,388$0.0015,668
2010-03-10Option exercise (derivative)2,000$0.0012,200
2010-03-10Option exercise1,388$0.003,779
2010-03-10Option exercise2,000$0.005,779
2010-03-10Tax withholding1,054$19.074,725
2010-03-04Grant / award (derivative)8,400$0.0016,976
2010-03-04Grant / award (derivative)6,000$0.0014,200
2010-03-01Option exercise (derivative)3,787$0.0016,856
2010-03-01Option exercise3,787$0.003,787
2010-03-01Tax withholding1,396$18.352,391
2009-08-03Open-market sale12,906$19.600
2009-03-16Grant / award (derivative)8,400$0.0018,963
2009-03-10Option exercise (derivative)3,388$0.0010,563
2009-03-10Tax withholding1,054$12.1912,906
2009-03-10Option exercise3,388$0.0013,960
2009-03-02Option exercise (derivative)3,786$0.0015,787
2009-03-02Open-market sale1,178$11.8910,572
2009-03-02Option exercise3,786$0.0011,750
2009-02-13Tax withholding4,036$15.897,964
2008-05-19Option exercise (derivative)7,500$0.001,875
2008-05-19Option exercise7,500$14.7222,602
2008-05-19Open-market sale7,500$25.6415,102
2008-05-19Open-market sale3,102$25.7212,000
2008-03-10Grant / award (derivative)12,000$0.0020,214
2008-03-01Option exercise (derivative)3,786$0.008,214
2008-03-01Option exercise3,786$0.0016,449
2008-03-01Tax withholding1,347$0.0015,102
2007-06-11Option exercise (derivative)133$0.0011,000
2007-06-11Open-market sale133$27.4012,663
2007-06-11Option exercise133$24.5012,796
2007-06-04Option exercise (derivative)7,448$0.0011,133
2007-06-04Open-market sale7,448$27.4012,663
2007-06-04Option exercise7,448$24.5020,111
2007-06-01Option exercise (derivative)15,990$0.003,565
2007-06-01Open-market sale15,990$27.4212,663
2007-06-01Option exercise15,990$24.5028,653
2007-05-31Option exercise (derivative)20,000$0.0019,555
2007-05-31Option exercise20,000$24.5032,663
2007-05-31Open-market sale10,000$27.2312,663
2007-05-31Open-market sale10,000$27.1922,663
2007-05-22Option exercise (derivative)13,700$0.003,565
2007-05-22Option exercise (derivative)4,125$0.0017,265
2007-05-22Open-market sale17,825$27.0512,663
2007-05-22Option exercise13,700$24.5030,488
2007-05-22Option exercise4,125$23.5016,788
2007-05-21Option exercise (derivative)9,375$0.0035,065
2007-05-21Option exercise (derivative)1,875$0.0033,190
2007-05-21Option exercise (derivative)6,300$0.0021,390
2007-05-21Option exercise (derivative)5,500$0.0027,690
2007-05-21Option exercise6,300$24.5035,713
2007-05-21Option exercise5,500$23.5029,413
2007-05-21Open-market sale23,050$27.1012,663
2007-05-21Option exercise1,875$14.7223,913
2007-05-21Option exercise9,375$17.7422,038
2007-05-07Option exercise (derivative)1,972$0.0044,440
2007-05-07Option exercise1,972$24.5014,635
2007-05-07Open-market sale1,972$27.6012,663
2007-05-04Option exercise (derivative)24,557$0.0046,412
2007-05-04Open-market sale24,557$27.6012,663
2007-05-04Option exercise24,557$24.5037,220
2007-05-02Option exercise (derivative)1,875$0.00121,244
2007-05-02Option exercise (derivative)15,375$0.00105,869
2007-05-02Option exercise (derivative)34,900$0.0070,969
2007-05-02Option exercise (derivative)3,750$0.00123,119
2007-05-02Open-market sale55,900$27.6012,663
2007-05-02Option exercise34,900$24.5068,563
2007-05-02Option exercise3,750$14.7216,413
2007-05-02Option exercise1,875$16.8818,288
2007-05-02Option exercise15,375$23.5033,663
2007-04-16Option exercise (derivative)28,125$0.00126,869
2007-04-16Open-market sale2,225$26.8712,663
2007-04-16Open-market sale13,900$26.8514,888
2007-04-16Option exercise28,125$17.7440,788
2007-04-16Open-market sale1,000$26.8539,788
2007-04-16Open-market sale1,600$26.8638,188
2007-04-16Open-market sale9,400$26.8628,788
2007-03-01Grant / award (derivative)12,000$0.0012,000
2007-02-15Option exercise (derivative)15,000$0.00192,494
2007-02-15Option exercise (derivative)3,750$0.00207,494
2007-02-15Option exercise (derivative)37,500$0.00154,994
2007-02-15Option exercise15,000$14.7227,663
2007-02-15Option exercise37,500$17.7450,163
2007-02-15Option exercise3,750$16.8816,413
2007-02-15Open-market sale37,500$24.2512,663
2006-04-19Option exercise (derivative)490$0.00236,000
2006-04-19Option exercise (derivative)926$0.00236,490
2006-04-19Option exercise (derivative)30,000$0.00237,416
2006-04-19Option exercise (derivative)381$0.00211,244
2006-04-19Option exercise (derivative)24,375$0.00211,625
2006-04-19Option exercise490$18.4444,079
2006-04-19Option exercise381$17.6068,835
2006-04-19Option exercise24,375$16.8868,454
2006-04-19Open-market sale56,172$23.8612,663
2006-04-19Option exercise926$20.0243,589
2006-04-19Option exercise30,000$17.2542,663
2006-02-13Grant / award12,000$0.0012,663
2005-02-14Grant / award (derivative)75,000$0.00267,416

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.