Lee John Tseng-Chung insider trades
Lee John Tseng-Chung has filed 27 Form 4s with the SEC that we hold, for Mks INC (MKSI) (President & CEO, Director) and Cognex Corp (CGNX) (Director). Across all of them we count 0 purchases worth $0 and 6 sales worth $13.9M reported on Form 4. In the last 12 months: 0 purchases ($0) and 6 sales ($13.9M). The largest single trade was a sale of 13,310 shares of Mks INC worth $3.4M, dated 2026-02-20. The first filing on our record is dated 2022-01-24 and the latest 2026-08-17.
Mks INC (MKSI)
| Trade date | Code | Shares | Value as filed | Filed | Source |
|---|---|---|---|---|---|
| 2026-02-20 | S, sale reported on Form 4 | 1,988 | $512.5K | 2026-02-23 | SEC |
| 2026-02-20 | S, sale reported on Form 4 | 1,890 | $490.8K | 2026-02-23 | SEC |
| 2026-02-20 | S, sale reported on Form 4 | 12,812 | $3.3M | 2026-02-23 | SEC |
| 2026-02-20 | S, sale reported on Form 4 | 13,310 | $3.4M | 2026-02-23 | SEC |
| 2026-05-22 | S, sale reported on Form 4 | 10,000 | $3.2M | 2026-05-26 | SEC |
| 2026-08-14 | S, sale reported on Form 4 | 10,000 | $3.0M | 2026-08-17 | SEC |
Cognex Corp (CGNX)
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
Counted from the Form 4 filings this reporting owner (SEC CIK 1414656) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
