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MKSINasdaq
MKS INC
Industrial Instruments For Measurement, Display, and Control · MA · CIK 1049502
MKS Inc provides foundational technology solutions for semiconductor manufacturing, electronics, and industrial applications
red 8-K · 90d
$24.02B
Market cap
$416.00
Last close
+7.0%
1D
-1.1%
5D
2.1M
Volume
Price · last 39 sessions+42.7%
May 4L $287.65 · H $420.56Jun 29
216
Total filings
May 12, 2026
Last filing
12/31
Fiscal year end
8-KExecutive Change · Shareholder VoteMay 12, 202610-Q10-QMay 7, 20268-KResults of OperationsMay 6, 20268-KExecutive ChangeApr 6, 2026DEFA14ADEFA14AMar 31, 2026DEF 14ADEF 14AMar 31, 202610-K10-KFeb 24, 20268-KResults of OperationsFeb 17, 20268-KMaterial Agreement · New Debt / ObligationFeb 5, 20268-KCompany UpdateJan 28, 20268-KResults of Operations · Reg FD DisclosureJan 21, 202610-Q10-QNov 6, 20258-KResults of OperationsNov 5, 202510-Q10-QAug 7, 20258-KResults of OperationsAug 6, 20258-KExecutive Change · Security-Holder RightsMay 15, 202510-Q10-QMay 8, 20258-KResults of OperationsMay 7, 2025DEFA14ADEFA14AApr 1, 2025DEF 14ADEF 14AApr 1, 202510-K10-KFeb 25, 20258-KResults of OperationsFeb 12, 20258-KMaterial Agreement · New Debt / ObligationJan 24, 20258-KBylaw AmendmentDec 3, 202410-Q10-QNov 7, 20248-KResults of OperationsNov 6, 20248-KExecutive Change · Reg FD DisclosureNov 5, 20248-KExecutive Change · Reg FD DisclosureAug 13, 202410-Q10-QAug 8, 20248-KResults of OperationsAug 7, 20248-KMaterial Agreement · New Debt / ObligationJul 23, 20248-KReg FD DisclosureJun 20, 20248-KMaterial Agreement · New Debt / ObligationMay 16, 20248-KCompany UpdateMay 14, 20248-KCompany UpdateMay 13, 202410-Q10-QMay 9, 20248-KResults of OperationsMay 8, 20248-KExecutive Change · Shareholder VoteMay 8, 20248-KExecutive ChangeApr 1, 2024DEFA14ADEFA14AMar 27, 2024DEF 14ADEF 14AMar 27, 202410-K10-KFeb 27, 20248-KMaterial Agreement · New Debt / ObligationFeb 14, 2024SC 13GSC 13GFeb 9, 20248-KExecutive ChangeFeb 8, 20248-KResults of OperationsFeb 7, 20248-KMaterial Agreement · New Debt / ObligationJan 22, 2024SC 13GSC 13GJan 10, 20248-KExecutive Change · Reg FD DisclosureDec 4, 202310-Q10-QNov 8, 20238-KResults of OperationsNov 1, 20238-KMaterial Agreement · New Debt / ObligationOct 3, 202310-Q10-QAug 4, 20238-KResults of OperationsAug 2, 20238-KMaterial Agreement · Company UpdateJun 5, 20238-KShareholder VoteMay 18, 202310-Q10-QMay 5, 20238-KResults of OperationsMay 3, 2023DEFA14ADEFA14AApr 5, 2023DEF 14ADEF 14AApr 5, 202310-K10-KMar 14, 20238-KResults of OperationsFeb 27, 20238-KCompany UpdateFeb 13, 20238-KCompany UpdateFeb 6, 2023SC 13GSC 13GFeb 2, 20238-KReg FD DisclosureDec 13, 202210-Q10-QNov 7, 20228-KResults of OperationsNov 2, 20228-KReg FD DisclosureAug 31, 2022SC 13GSC 13GAug 29, 20228-K/ACompany UpdateAug 24, 20228-KExecutive Change · Material AgreementAug 17, 20228-K/AExecutive ChangeAug 17, 202210-Q10-QAug 3, 20228-KCompany UpdateJul 28, 20228-KResults of OperationsJul 27, 20228-KExecutive Change · Shareholder VoteMay 11, 202210-Q10-QMay 2, 20228-KResults of OperationsApr 26, 20228-KReg FD DisclosureApr 5, 2022
Insider Activity
In the 90 days to Mar 12, 2026: 11 sold $18.3M.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 12, 2026 | Moloney Jacqueline FDirector | Sell | 340 | $213.77 | $73K |
| Mar 6, 2026 | Taranto Eric RobertEVP & GM, VSD | Sell | 4,568 | $220.52 | $1.0M |
| Mar 2, 2026 | Mora ElizabethDirector | Sell | 300 | $239.44 | $72K |
| Feb 24, 2026 | Colella Gerald GDirector | Sell | 10,000 | $253.97 | $2.5M |
| Feb 24, 2026 | Schreiner James AlanEVP & COO | Sell | 4,100 | $255.00 | $1.0M |
| Feb 20, 2026 | Lee John Tseng-ChungPresident & CEO | Sell | 13,310 | $256.05 | $3.4M |
| Feb 20, 2026 | Lee John Tseng-ChungPresident & CEO | Sell | 12,812 | $256.93 | $3.3M |
| Feb 20, 2026 | Colella Gerald GDirector | Sell | 10,000 | $252.90 | $2.5M |
| Feb 20, 2026 | Burke Kathleen FlahertyEVP, GC & Secretary | Sell | 4,254 | $250.00 | $1.1M |
| Feb 20, 2026 | Williams John EdwardEVP & GM, PSD | Sell | 2,043 | $256.41 | $524K |
| Feb 20, 2026 | Henry David PhilipEVP, Global Str Mktg & GM, MSD | Sell | 2,000 | $261.56 | $523K |
| Feb 20, 2026 | Lee John Tseng-ChungPresident & CEO | Sell | 1,988 | $257.81 | $513K |
| Feb 20, 2026 | Lee John Tseng-ChungPresident & CEO | Sell | 1,890 | $259.70 | $491K |
| Feb 20, 2026 | Taranto Eric RobertEVP & GM, VSD | Sell | 1,453 | $247.55 | $360K |
| Feb 20, 2026 | Cannone Peter IiiDirector | Sell | 1,250 | $258.06 | $323K |
| Feb 20, 2026 | Moloney Jacqueline FDirector | Sell | 829 | $247.55 | $205K |
| Feb 20, 2026 | Mccarthy Michelle MVP & Chief Accounting Officer | Sell | 816 | $250.35 | $204K |
| Feb 20, 2026 | Mccarthy Michelle MVP & Chief Accounting Officer | Sell | 650 | $249.57 | $162K |
| Dec 2, 2025 | Mora ElizabethDirector | Sell | 300 | $158.81 | $48K |
| Oct 22, 2025 | Schreiner James AlanEVP & COO | Sell | 711 | $138.68 | $99K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
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