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John Tseng-chung Lee currently holds 134,776.27 shares of MKS INSTRUMENTS INC (MKSI), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, John Tseng-chung Lee has been a net seller of MKSI stock. They have purchased $31.1K and sold $11.6M worth of shares.
John Tseng-chung Lee's most recent insider trade was on Aug 14, 2026, when they sold 10,000 shares at $302.01 per share.
John Tseng-chung Lee serves as Executive at MKS INSTRUMENTS INC (MKSI). They have executed 201 insider transactions totaling $11.6M over their tenure at the company.
John Tseng-chung Lee holds the position of Executive at MKS INSTRUMENTS INC, where they are responsible for executive-level decision-making and strategic oversight. They have been associated with the company for 18 years and currently hold a stake valued at $0.
John Tseng-chung Lee has shown a selling trading pattern, with $31.1K in total purchases and $11.6M in total sales across all transactions. Their most recent activity indicates a tendency to reduce their position.
The largest transaction by John Tseng-chung Lee was on Feb 15, 2024, when they sold $3.7M worth of MKSI shares. This transaction involved 30,231 shares at $122.15 per share.
John Tseng-chung Lee currently owns 134,776.27 shares of MKS INSTRUMENTS INC (MKSI), with an estimated value of $0. This stake represents their equity holdings accumulated through purchases, awards, and option exercises.
All of John Tseng-chung Lee's SEC Form 4 insider trading filings are tracked on this page. Each transaction links directly to the official SEC EDGAR filing. John Tseng-chung Lee has 201 Form 4 filings on record as an insider at MKS INSTRUMENTS INC.
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