John Tseng-Chung Lee

Sits on 2 boards. Last updated September 28, 2026

Time on boards

Boards served
2
Current seats
2
Board service
7 years
Director since
2023

7 years of board service in total across 2 boards, counting each seat separately. Longest: MKS Inc., 3 years.

MKS Inc. Director ยท President & CEO
3 years ยท Since 2023
3 years ยท Since 2023

Chief executive roles

MKS Inc. ยท President & CEO
Dates unknown

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Date Company Transaction Shares Price Value
May 22, 2026 MKS Inc. Open-market sale โˆ’10,000 $315.48 $3,154,800
Feb 21, 2026 Cognex Corporation Option exercise +2,913 โ€” โ€”
Feb 20, 2026 MKS Inc. Open-market sale โˆ’13,310 $256.05 $3,408,026
Feb 20, 2026 MKS Inc. Open-market sale โˆ’12,812 $256.93 $3,291,787
Feb 20, 2026 MKS Inc. Open-market sale โˆ’1,988 $257.81 $512,526
Feb 20, 2026 MKS Inc. Open-market sale โˆ’1,890 $259.70 $490,833
Feb 18, 2026 Cognex Corporation Option exercise +8,324 โ€” โ€”
Feb 17, 2026 MKS Inc. Option exercise +22,088 โ€” โ€”
Feb 17, 2026 MKS Inc. Option exercise +7,654 โ€” โ€”
Feb 17, 2026 MKS Inc. Option exercise +3,859 โ€” โ€”
Feb 17, 2026 MKS Inc. Option exercise +7,208 โ€” โ€”
Feb 17, 2026 MKS Inc. Option exercise +16,989 โ€” โ€”
Feb 17, 2026 MKS Inc. Option exercise +12,091 โ€” โ€”
Feb 17, 2026 MKS Inc. Shares withheld for tax โˆ’32,548 $260.74 $8,486,646
Oct 31, 2025 MKS Inc. Option exercise +352 โ€” โ€”

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