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MKSI Insider Trading

Form 4 insider transactions for MKSI over the last 6 months. Buys, sells and grants by directors and officers.

InsiderDateTypeSharesPrice
Lee John Tseng-ChungPresident & CEOOct 30, 2026Tax withholding2,157$202.04
Lee John Tseng-ChungPresident & CEOOct 30, 2026Option exercise2,157—
Mora ElizabethSep 1, 2026Sell300$250.96
Lee John Tseng-ChungPresident & CEOAug 14, 2026Sell10,000$302.01
Williams John EdwardEVP & GM, PSDAug 3, 2026Sell457$288.31
Schreiner James AlanEVP & COOJun 12, 2026Sell3,500$345.82
Schreiner James AlanEVP & COOJun 10, 2026Sell781$317.42
McCarthy Michelle MSVP & Chief Accounting OfficerJun 5, 2026Sell2,434$315.23
Mora ElizabethJun 1, 2026Sell300$318.02
Henry David PhilipEVP, Global Str Mktg & GM, MSDJun 1, 2026Sell6,000$314.43
COLELLA GERALD GMay 27, 2026Sell20,000$333.40
Donahue Joseph BMay 27, 2026Sell2,100$327.95
Henry David PhilipEVP, Global Str Mktg & GM, MSDMay 26, 2026Sell2,500$330.50
Lee John Tseng-ChungPresident & CEOMay 22, 2026Sell10,000$315.48
Mayampurath RamakumarEVP & CFOMay 22, 2026Sell8,810$315.48
CANNONE PETER IIIMay 18, 2026Sell1,350$303.40
Moloney Jacqueline FMay 14, 2026Sell1,000$312.20
Moloney Jacqueline FMay 13, 2026Sell1,400$318.99
COLELLA GERALD GMay 11, 2026Grant / award782—
Batra RajMay 11, 2026Grant / award782—
CANNONE PETER IIIMay 11, 2026Grant / award782—
Donahue Joseph BMay 11, 2026Grant / award782—
Burke Kathleen FlahertyEVP, GC & SecretaryMay 11, 2026Sell4,355$319.94
Mora ElizabethMay 11, 2026Grant / award782—
JABRE WISSAM GMay 11, 2026Grant / award782—
Moloney Jacqueline FMay 11, 2026Grant / award782—
Taranto Eric RobertEVP & GM, VSDMay 11, 2026Sell2,849$319.93

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Source: SEC EDGAR Form 4 filings.