John Tseng-Chung Lee insider trades

Open-market stock purchases and sales by John Tseng-Chung Lee, President & CEO at MKS Inc, from SEC Form 4 filings since Feb 11, 2010.

Recent trades

DateStockTradeValue
Aug 14, 2026MKSI MKS IncSold$3M
May 22, 2026MKSI MKS IncSold$3.2M
Feb 21, 2026CGNX Cognex CorpBought (not open market)—
Feb 20, 2026MKSI MKS IncSold$3.3M
Feb 20, 2026MKSI MKS IncSold$491K
Feb 20, 2026MKSI MKS IncSold$3.4M
Feb 20, 2026MKSI MKS IncSold$513K
Feb 18, 2026CGNX Cognex CorpBought (not open market)—
Feb 17, 2026MKSI MKS IncSold (not open market)$8.5M
Feb 17, 2026CGNX Cognex CorpBought (not open market)—
Feb 17, 2026MKSI MKS IncBought (not open market)—
Feb 17, 2026MKSI MKS IncBought (not open market)—
Feb 17, 2026MKSI MKS IncBought (not open market)—
Feb 17, 2026MKSI MKS IncBought (not open market)—
Feb 17, 2026MKSI MKS IncBought (not open market)—
Feb 17, 2026MKSI MKS IncBought (not open market)—
Feb 17, 2026MKSI MKS IncBought (not open market)—
Feb 8, 2026MKSI MKS IncBought (not open market)—
Oct 31, 2025MKSI MKS IncSold (not open market)$288K
Oct 31, 2025MKSI MKS IncBought (not open market)—
Oct 31, 2025MKSI MKS IncBought (not open market)—

Companies traded

  • MKSI MKS Inc: 3 buys, 26 sales, last Aug 14, 2026
  • CGNX Cognex Corp: other filings, last Feb 21, 2026

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