Lee John Tseng-Chung

MKS Instruments Inc ยท President & CEO

Lee John Tseng-Chung is listed in public filings as director, officer: President & CEO. This Lee John Tseng-Chung insider trading page organizes Form 4 disclosures, reported purchases and sales, transaction dates, share amounts, related issuers, and historical insider activity so readers can review the person's public trading record in one place. Companies and tickers connected to this insider trading profile include MKS Instruments Inc (MKSI), and Cognex Corporation (CGNX). Investors use Lee John Tseng-Chung's insider trading disclosures to study buying and selling patterns, position changes, company-specific activity, and the source evidence behind each reported transaction.

Latest Actions

CompanyHolding ValueLast TransactionAmountTransaction PriceCurrent Price
MKS Instruments IncMKSI$46M144.7k sharesSellMay 22, 2026$3.2M10k shares$315.48--

Insider Trades History

CompanyHolding ValueLast TransactionAmountTransaction PriceCurrent Price
Cognex CorporationCGNX--2.9k sharesGrant / ExerciseFeb 21, 2026Disclosure amount unavailable2.9k shares----
MKS Instruments IncMKSI$44M171.4k sharesSellFeb 20, 2026$3.4M13.3k shares$256.05--
MKS Instruments IncMKSI$41M158.6k sharesSellFeb 20, 2026$3.3M12.8k shares$256.93--
MKS Instruments IncMKSI$40M156.6k sharesSellFeb 20, 2026$512.5K2k shares$257.81--
MKS Instruments IncMKSI$40M154.7k sharesSellFeb 20, 2026$490.8K1.9k shares$259.70--
Cognex CorporationCGNX--8.3k sharesGrant / ExerciseFeb 18, 2026Disclosure amount unavailable8.3k shares----
MKS Instruments IncMKSI$48M184.7k sharesGrant / ExerciseFeb 17, 2026$8.5M32.5k shares$260.74--
MKS Instruments IncMKSI--84.8k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable12.1k shares----
MKS Instruments IncMKSI--96.9k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable17k shares----
MKS Instruments IncMKSI--113.9k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable7.2k shares----
MKS Instruments IncMKSI--121.1k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable3.9k shares----
MKS Instruments IncMKSI--125k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable7.7k shares----
MKS Instruments IncMKSI--132.6k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable22.1k shares----
MKS Instruments IncMKSI--154.7k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable15.6k shares----
Cognex CorporationCGNX--4.8k sharesGrant / ExerciseFeb 17, 2026Disclosure amount unavailable4.8k shares----
MKS Instruments IncMKSI--139.1k sharesGrant / ExerciseFeb 8, 2026Disclosure amount unavailable51k shares----
MKS Instruments IncMKSI$21M147.3k sharesGrant / ExerciseOct 31, 2025$287.9K2k shares$143.71--
MKS Instruments IncMKSI--88.2k sharesGrant / ExerciseOct 31, 2025Disclosure amount unavailable1.7k shares----
MKS Instruments IncMKSI--89.8k sharesGrant / ExerciseOct 31, 2025Disclosure amount unavailable352 shares----
Cognex CorporationCGNX--1.8k sharesGrant / ExerciseMay 9, 2025Disclosure amount unavailable1.8k shares----
Cognex CorporationCGNX--2.9k sharesGrant / ExerciseFeb 21, 2025Disclosure amount unavailable1.7k shares----
Cognex CorporationCGNX--7k sharesGrant / ExerciseFeb 20, 2025Disclosure amount unavailable7k shares----
MKS Instruments IncMKSI$15M147.1k sharesGrant / ExerciseFeb 18, 2025$2.8M27.3k shares$103.67--
MKS Instruments IncMKSI--90.2k sharesGrant / ExerciseFeb 18, 2025Disclosure amount unavailable7.2k shares----
MKS Instruments IncMKSI--97.4k sharesGrant / ExerciseFeb 18, 2025Disclosure amount unavailable4k shares----
MKS Instruments IncMKSI--101.4k sharesGrant / ExerciseFeb 18, 2025Disclosure amount unavailable7.7k shares----
MKS Instruments IncMKSI--109.1k sharesGrant / ExerciseFeb 18, 2025Disclosure amount unavailable22.1k shares----
MKS Instruments IncMKSI--126.7k sharesGrant / ExerciseFeb 18, 2025Disclosure amount unavailable14k shares----
MKS Instruments IncMKSI--131.1k sharesGrant / ExerciseFeb 18, 2025Disclosure amount unavailable6.7k shares----
MKS Instruments IncMKSI--151.9k sharesGrant / ExerciseFeb 18, 2025Disclosure amount unavailable37.9k shares----
MKS Instruments IncMKSI--114k sharesGrant / ExerciseFeb 10, 2025Disclosure amount unavailable12.1k shares----
MKS Instruments IncMKSI$13M112.7k sharesGrant / ExerciseDec 6, 2024$343.1K3k shares$114.60--
MKS Instruments IncMKSI--101.9k sharesGrant / ExerciseDec 6, 2024Disclosure amount unavailable984 shares----
MKS Instruments IncMKSI--102.9k sharesGrant / ExerciseDec 6, 2024Disclosure amount unavailable2k shares----