Lee John Tseng-Chung Insider Trading -- Recent SEC Form 4 Transactions

Lee John Tseng-Chung (CIK 1414656) reported 26 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-02-24). Recent activity: Buy CGNX (2,913 shares), Sell MKSI (13,310 shares), Sell MKSI (12,812 shares), Sell MKSI (1,988 shares), Sell MKSI (1,890 shares). Source: SEC Form 4.

DateCompanyRoleTypeSharesValue
2026-02-24COGNEX CORP (CGNX)DirectorBuy2,913$0
2026-02-23MKS INC (MKSI)President & CEOSell13,310$3.4M
2026-02-23MKS INC (MKSI)President & CEOSell12,812$3.3M
2026-02-23MKS INC (MKSI)President & CEOSell1,988$512,526
2026-02-23MKS INC (MKSI)President & CEOSell1,890$490,833
2026-02-19COGNEX CORP (CGNX)DirectorBuy8,324$0
2026-02-18MKS INC (MKSI)President & CEOSell32,548$8.5M
2026-02-18MKS INC (MKSI)President & CEOBuy7,654$0
2026-02-18MKS INC (MKSI)President & CEOBuy3,859$0
2026-02-18MKS INC (MKSI)President & CEOBuy7,208$0
2026-02-18MKS INC (MKSI)President & CEOBuy16,989$0
2026-02-18MKS INC (MKSI)President & CEOBuy12,091$0
2026-02-18MKS INC (MKSI)President & CEOBuy22,088$0
2025-11-04MKS INC (MKSI)President & CEOBuy352$0
2025-11-04MKS INC (MKSI)President & CEOBuy1,651$0
2025-11-04MKS INC (MKSI)President & CEOSell2,003$287,851
2025-05-12COGNEX CORP (CGNX)DirectorBuy1,848$0
2025-02-24COGNEX CORP (CGNX)DirectorBuy6,973$0
2025-02-24COGNEX CORP (CGNX)DirectorBuy1,747$0
2025-02-19MKS INSTRUMENTS INC (MKSI)President & CEOBuy14,041$0
2025-02-19MKS INSTRUMENTS INC (MKSI)President & CEOBuy6,735$0
2025-02-19MKS INSTRUMENTS INC (MKSI)President & CEOBuy22,088$0
2025-02-19MKS INSTRUMENTS INC (MKSI)President & CEOBuy7,654$0
2025-02-19MKS INSTRUMENTS INC (MKSI)President & CEOBuy4,035$0
2025-02-19MKS INSTRUMENTS INC (MKSI)President & CEOBuy7,207$0

Source: SEC Form 4 filings · as of 2026-02-24