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MKS Inc

MKSI
Exchange
Nasdaq
Industry
Industrial Instruments For Measurement, Display, and Control
SEC CIK
0001049502

In the last 90 days, MKS Inc insiders filed 0 open-market purchases and 3 sales; 808 institutions reported holding it in 13F filings for Q2 2026, worth $35.1B in total; Maverick Capital is the only superinvestor holding it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by MKS Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
3 filings
3 insiders, $3.23M in total
Insiders trading
3
Net value
−$3.23M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for MKS Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for MKS Inc
NameTitleLast reported holdingLast filingFilings, past year
Mora ElizabethDirector18,845Sep 2, 20265
Donlan Renee MartelEVP, GC & CCO–Aug 18, 20261
Lee John Tseng-ChungPresident & CEO134,776Aug 17, 20266
Williams John EdwardEVP & GM, PSD4,098Aug 4, 20265
Schreiner James AlanEVP & COO19,201Jun 16, 20266
McCarthy Michelle MSVP & Chief Accounting Officer2Jun 8, 20263
Henry David PhilipEVP, Global Str Mktg & GM, MSD10,422Jun 2, 20265
Colella Gerard GDirector20,017IndirectMay 28, 20263
Donahue Joseph BDirector10,033May 28, 20262
Mayampurath RamakumarEVP & CFO1May 26, 20264
Cannone Peter IIIDirector7,794May 19, 20263
Moloney Jacqueline FDirector8,775May 15, 20266
Batra RajDirector16,227May 12, 20261
Burke Kathleen FlahertyEVP, GC & Secretary49,439May 12, 20265
Taranto Eric RobertEVP & GM, VSD12,596May 12, 20265
Jabre Wissam GDirector5,270May 12, 20261
Warner Michelle MDirector10,852May 8, 20240
Bagshaw Seth HEVP, CFO & Treasurer1Feb 26, 20240
Gitin Mark MiltonEVP & GM, PSD16,134Feb 16, 20240
Carlyle Asia Partners IV, L.P.10% Owner6,482,732IndirectMay 10, 20230
Carlyle Partners VI Cayman Holdings, L.P.10% Owner6,482,732IndirectMay 10, 20230
Gamma Holding Co Ltd10% Owner6,482,732IndirectMay 10, 20230
CEP IV Participations, S.a r.l. SICAR10% Owner6,482,732IndirectMay 10, 20230
CEP IV Managing GP, L.P.10% Owner6,482,732IndirectMay 10, 20230
CEP IV Managing GP Holdings, Ltd.10% Owner6,482,732IndirectMay 10, 20230
CAP IV General Partner, L.P.10% Owner6,482,732IndirectMay 10, 20230
Cap IV, L.L.C.10% Owner6,482,732IndirectMay 10, 20230
TC Group Cayman Investment Holdings, L.P.10% Owner6,482,732IndirectMay 10, 20230
Carlyle Group Inc.10% Owner6,482,732IndirectMay 10, 20230
Carlyle Holdings II GP L.L.C.10% Owner6,482,732IndirectMay 10, 20230
Carlyle Holdings II L.L.C.10% Owner6,482,732IndirectMay 10, 20230
TC Group Cayman Investment Holdings Sub L.P.10% Owner6,482,732IndirectMay 10, 20230
CG Subsidiary Holdings L.L.C.10% Owner6,482,732IndirectMay 10, 20230
TC Group VI Cayman, L.L.C.10% Owner6,482,732IndirectMay 10, 20230
TC Group VI Cayman, L.P.10% Owner6,482,732IndirectMay 10, 20230
Wild GeoffreyDirector1,813Aug 18, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 2, 2026 (view filing)12:34 PM ETSep 11 dayMora ElizabethDirectorSSale−300$250.96−$75.3K−1.6%18.8K after10b5-1
Aug 17, 2026 (view filing)10:11 AM ETAug 143 daysLee John Tseng-ChungPresident & CEOSSale−10.0K$302.01−$3.02M−6.9%134.8K after10b5-1
Aug 4, 2026 (view filing)12:21 PM ETAug 31 dayWilliams John EdwardEVP & GM, PSDSSale−457$288.31−$131.8K−10.0%4.10K after10b5-1
Jun 16, 2026 (view filing)Jun 124 daysSchreiner James AlanEVP & COOSSale−3.50K$345.82−$1.21M−15.4%19.2K after3 lots
Jun 11, 2026 (view filing)Jun 101 daySchreiner James AlanEVP & COOSSale−781$317.42−$247.9K−3.3%22.7K after10b5-1
Jun 8, 2026 (view filing)Jun 53 daysMcCarthy Michelle MSVP & Chief Accounting OfficerSSale−2.43K$315.23−$767.3K−99.9%1.55 after10b5-1
Jun 2, 2026 (view filing)Jun 11 dayHenry David PhilipEVP, Global Str Mktg & GM, MSDSSale−6.00K$314.43−$1.89M−36.5%10.4K after
Jun 2, 2026 (view filing)Jun 11 dayMora ElizabethDirectorSSale−300$318.02−$95.4K−1.5%19.1K after10b5-1
May 28, 2026 (view filing)May 271 dayDonahue Joseph BDirectorSSale−2.10K$327.95−$688.7K−17.3%10.0K after
May 28, 2026 (view filing)May 271 dayColella Gerard GDirectorSSale−20.0K$333.40−$6.67M−50.0%20.0K after7 lots10b5-1
May 27, 2026 (view filing)May 261 dayHenry David PhilipEVP, Global Str Mktg & GM, MSDSSale−2.50K$330.50−$826.3K−13.3%16.3K after10b5-1
May 26, 2026 (view filing)May 224 daysMayampurath RamakumarEVP & CFOSSale−8.81K$315.48−$2.78M−100.0%1.14 after10b5-1
May 26, 2026 (view filing)May 224 daysLee John Tseng-ChungPresident & CEOSSale−10.0K$315.48−$3.15M−6.5%144.7K after10b5-1
May 19, 2026 (view filing)May 181 dayCannone Peter IIIDirectorSSale−1.35K$303.40−$409.6K−14.8%7.79K after
May 15, 2026 (view filing)May 141 dayMoloney Jacqueline FDirectorSSale−1.00K$312.20−$312.2K−10.2%8.78K after
May 14, 2026 (view filing)May 131 dayMoloney Jacqueline FDirectorSSale−1.40K$318.99−$446.6K−12.5%9.78K after
May 12, 2026 (view filing)May 111 dayTaranto Eric RobertEVP & GM, VSDSSale−2.85K$319.93−$911.3K−18.4%12.6K after
May 12, 2026 (view filing)May 111 dayBurke Kathleen FlahertyEVP, GC & SecretarySSale−4.36K$319.94−$1.39M−8.1%49.4K after
Mar 13, 2026 (view filing)Mar 121 dayMoloney Jacqueline FDirectorSSale−340.11$213.77−$72.7K−3.2%10.4K after
Mar 9, 2026 (view filing)Mar 63 daysTaranto Eric RobertEVP & GM, VSDSSale−4.57K$220.52−$1.01M−22.8%15.4K after
Mar 3, 2026 (view filing)Mar 21 dayMora ElizabethDirectorSSale−300$239.44−$71.8K−1.6%18.7K after10b5-1
Feb 25, 2026 (view filing)Feb 241 daySchreiner James AlanEVP & COOSSale−4.10K$255.00−$1.05M−14.9%23.4K after
Feb 24, 2026 (view filing)Feb 20-244 daysColella Gerard GDirectorSSale−20.0K$253.44−$5.07M−33.3%40.0K after2 lots
Feb 23, 2026 (view filing)Feb 203 daysCannone Peter IIIDirectorSSale−1.25K$258.06−$322.6K−13.0%8.36K after
Feb 23, 2026 (view filing)Feb 203 daysTaranto Eric RobertEVP & GM, VSDSSale−1.45K$247.55−$359.6K−6.8%20.0K after
Feb 23, 2026 (view filing)Feb 203 daysHenry David PhilipEVP, Global Str Mktg & GM, MSDSSale−2.00K$261.56−$523.1K−9.6%18.8K after
Feb 23, 2026 (view filing)Feb 203 daysMcCarthy Michelle MVP & Chief Accounting OfficerSSale−1.47K$250.00−$366.5K−100.0%0 after2 lots
Feb 23, 2026 (view filing)Feb 203 daysMoloney Jacqueline FDirectorSSale−829$247.55−$205.2K−7.2%10.7K after
Feb 23, 2026 (view filing)Feb 203 daysWilliams John EdwardEVP & GM, PSDSSale−2.04K$256.41−$523.8K−35.9%3.64K after
Feb 23, 2026 (view filing)Feb 203 daysBurke Kathleen FlahertyEVP, GC & SecretarySSale−4.25K$250.00−$1.06M−7.3%53.8K after
Feb 23, 2026 (view filing)Feb 203 daysLee John Tseng-ChungPresident & CEOSSale−30.0K$256.77−$7.70M−16.2%154.7K after4 lots
Dec 3, 2025 (view filing)Dec 21 dayMora ElizabethDirectorSSale−300$158.81−$47.6K−1.6%19.0K after10b5-1
Oct 23, 2025 (view filing)Oct 221 daySchreiner James AlanEVP & COOSSale−711$138.68−$98.6K−3.1%22.5K after10b5-1
Oct 2, 2025 (view filing)Oct 11 dayMoloney Jacqueline FDirectorSSale−300$122.14−$36.6K−2.5%11.6K after10b5-1
Sep 19, 2025 (view filing)Sep 181 daySchreiner James AlanEVP & COOSSale−838$124.00−$103.9K−3.5%23.2K after10b5-1
Sep 19, 2025 (view filing)Sep 181 dayHenry David PhilipEVP, Global Str Mktg & GM, MSDSSale−5.00K$130.00−$650.0K−24.3%15.6K after10b5-1
Sep 3, 2025 (view filing)Sep 21 dayMora ElizabethDirectorSSale−300$99.85−$30.0K−1.5%19.3K after10b5-1
Aug 4, 2025 (view filing)Aug 13 daysMoloney Jacqueline FDirectorSSale−300$92.10−$27.6K−2.5%11.9K after10b5-1
Jul 8, 2025 (view filing)Jul 71 daySchreiner James AlanEVP & COO, MSDSSale−957$102.44−$98.0K−4.0%22.7K after10b5-1
Jul 7, 2025 (view filing)Jul 34 daysHenry David PhilipEVP, Operations & Corp MktgSSale−2.00K$105.00−$210.0K−8.9%20.6K after10b5-1
Jun 3, 2025 (view filing)Jun 21 dayMora ElizabethDirectorSSale−300$81.78−$24.5K−1.5%19.6K after10b5-1
Mar 4, 2025 (view filing)Mar 31 dayMora ElizabethDirectorSSale−275$92.46−$25.4K−1.6%17.4K after10b5-1
Mar 4, 2025 (view filing)Mar 31 dayMoloney Jacqueline FDirectorSSale−300$92.46−$27.7K−3.0%9.68K after10b5-1
Feb 19, 2025 (view filing)Feb 181 dayColella Gerard GDirectorSSale−8.00K$104.53−$836.2K−11.8%60.0K after
Dec 11, 2024 (view filing)Dec 101 dayMoloney Jacqueline FDirectorSSale−300$114.80−$34.4K−2.9%9.98K after10b5-1
Dec 3, 2024 (view filing)Dec 21 dayMora ElizabethDirectorSSale−275$113.41−$31.2K−1.5%17.7K after10b5-1
Oct 2, 2024 (view filing)Oct 11 dayMoloney Jacqueline FDirectorSSale−250$108.90−$27.2K−2.4%10.3K after10b5-1
Sep 4, 2024 (view filing)Sep 31 dayMora ElizabethDirectorSSale−275$115.97−$31.9K−1.5%17.9K after10b5-1
Aug 19, 2024 (view filing)Aug 163 daysWilliams John EdwardEVP & GM, PSDSSale−1.80K$118.71−$213.7K−99.3%13 after
Aug 2, 2024 (view filing)Aug 11 dayMoloney Jacqueline FDirectorSSale−250$123.46−$30.9K−2.3%10.5K after10b5-1