Lee John Tseng-Chung

Lee John Tseng-Chung is listed in filings as President & CEO at MKS Instruments Inc. This profile follows SEC Form 4 activity through May 26, 2026, including sale activity. Recent filings connect the profile to MKS Instruments Inc (MKSI) and Cognex Corporation (CGNX). The current snapshot covers public activity from Dec 10, 2024 to May 26, 2026. Reported amounts are shown as $343.1K to $287.9K. The page organizes purchases, sales, issuer links, reported share activity, and filing evidence for review as public disclosure data.