SEC CIK 1600515

Quirk Brian Charles

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

Current Positions

CompanyShares OwnedAs Of
MKSIview stock →17,640.592018-05-07

Position History — MKSI

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

07,83315,66623,4992014-032015-012015-042016-022017-022017-052018-022018-05

Recent Filings — MKSI

DateActivitySharesPriceOwned After
2018-05-07Open-market sale2,000$109.4017,640.59
2018-02-15Option exercise (derivative)1,773.15—8,007.77
2018-02-15Grant / award (derivative)3,375.34—9,159.19
2018-02-15Grant / award (derivative)2,250.23—6,870.99
2018-02-15Option exercise (derivative)1,489—5,783.85
2018-02-15Option exercise (derivative)2,157—5,850.77
2018-02-15Option exercise (derivative)2,805—7,272.85
2018-02-15Option exercise (derivative)1,230—4,620.77
2018-02-15Option exercise (derivative)2,181.55—10,077.85
2018-02-15Tax withholding3,858$111.1019,640.59
2018-02-15Option exercise1,230—23,498.59
2018-02-15Option exercise1,489—22,268.59
2018-02-15Option exercise2,157—20,779.59
2018-02-15Option exercise2,805—18,622.59
2018-02-15Option exercise1,773.15—15,817.59
2018-02-15Option exercise2,181.55—14,044.44
2018-02-12J (derivative)1,070.9—12,259.4
2018-02-05Open-market sale2,000$105.1011,862.88
2017-11-06Open-market sale2,000$107.9013,784.96
2017-08-08Open-market sale2,000$79.3015,784.96
2017-05-11Option exercise (derivative)3,557.87—13,330.3
2017-05-11Tax withholding1,565$80.5017,555.82
2017-05-11Option exercise3,557.87—19,120.82
2017-05-10Open-market sale2,000$80.0015,562.95
2017-04-03Open-market sale1,000$68.7517,562.95
2017-02-15Option exercise (derivative)2,804—16,888.18
2017-02-15Grant / award (derivative)5,539.14—21,873.18
2017-02-15Option exercise (derivative)2,157—9,780.92
2017-02-15Grant / award (derivative)3,692.76—13,710.92
2017-02-15Option exercise (derivative)1,773—11,937.92
2017-02-15Option exercise (derivative)2,181—19,692.18
2017-02-15Option exercise2,157—21,456.95
2017-02-15Option exercise2,181—14,722.95
2017-02-15Tax withholding2,894$67.7018,562.95
2017-02-15Option exercise2,804—19,299.95
2017-02-15Option exercise1,773—16,495.95
2017-02-13J (derivative)1,294.4—16,334.03
2017-02-10Option exercise (derivative)3,013.26—17,628.43
2017-02-10Option exercise (derivative)2,009.17—10,018.15
2017-02-10Option exercise3,013.26—12,222.77
2017-02-10Tax withholding1,690$66.9512,541.95
2017-02-10Option exercise2,009.17—14,231.95
2017-02-01Open-market sale1,000$66.609,209.52
2016-12-01Open-market sale1,000$57.4010,209.52
2016-10-03Open-market sale1,000$49.3611,209.52
2016-08-03Open-market sale1,000$45.1712,209.52
2016-07-05Grant / award (derivative)3,557.87—20,641.69
2016-05-16Open-market sale1,000$36.2513,209.52
2016-03-18Open-market sale1,000$36.0014,209.52
2016-02-25Option exercise (derivative)1,981.54—12,027.33
2016-02-25Option exercise (derivative)2,694.94—17,083.82
2016-02-25Option exercise1,981.54—16,728.52
2016-02-25Tax withholding1,519$32.7715,209.52
2016-02-25Option exercise2,694.94—14,746.98
2016-02-16Grant / award (derivative)9,708.01—19,778.76
2016-02-16Option exercise (derivative)2,180—10,070.75
2016-02-16Grant / award (derivative)6,472.01—14,008.86
2016-02-16Option exercise (derivative)1,773—7,536.86
2016-02-16Option exercise1,773—13,336.04
2016-02-16Tax withholding1,284$33.2212,052.04
2016-02-16Option exercise2,180—11,563.04
2016-02-10Option exercise (derivative)3,013—12,250.75
2016-02-10Option exercise (derivative)2,009—9,309.86
2016-02-10Option exercise3,013—9,115.04
2016-02-10Tax withholding1,741$32.709,383.04
2016-02-10Option exercise2,009—11,124.04
2016-01-28Open-market sale1,000$36.006,102.04
2016-01-26J (derivative)1,436.17—15,263.75
2015-12-16Open-market sale1,000$36.037,102.04
2015-04-02Option exercise (derivative)2,469.41$0.0011,318.86
2015-04-02Option exercise2,469.41$33.748,905.04
2015-04-02Tax withholding803$33.748,102.04
2015-02-25Option exercise (derivative)1,981—13,788.26
2015-02-25Option exercise (derivative)2,694.64$0.0016,699.92
2015-02-25Tax withholding1,520$35.836,435.64
2015-02-25Option exercise1,981—7,955.64
2015-02-25Option exercise2,694.64$35.835,974.64
2015-02-17Grant / award (derivative)7,978.72—19,394.55
2015-02-17Grant / award (derivative)5,319.15—15,769.26
2015-02-10Option exercise (derivative)3,013—11,415.83
2015-02-10Option exercise (derivative)2,008—10,450.11
2015-02-10Option exercise3,013—3,013
2015-02-10Tax withholding1,741$35.863,280
2015-02-10Option exercise2,008—5,021
2015-01-30Open-market sale1,041$36.090.77
2015-01-23Open-market sale1,040$34.761,041.77
2015-01-16Open-market sale1,040$33.102,081.77
2014-12-12Open-market sale1,041$35.973,121.77
2014-12-05Open-market sale1,040$36.174,162.77
2014-11-21Open-market sale1,040$36.305,202.77
2014-04-11Option exercise (derivative)2,113.14—12,458.11
2014-04-11Tax withholding688$28.006,242.77
2014-04-11Option exercise2,113.14—6,930.77
2014-04-02Option exercise (derivative)2,469—14,571.25
2014-04-02Option exercise2,469—5,621.64
2014-04-02Tax withholding804$30.704,817.64
2014-03-01———3,152.64

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