Lee John Tseng-Chung
President & CEO · 17 insider transactions on file
All transactions
| Date | Ticker | Company | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-05-22 | MKSI | MKS INC | Sale | 10,000 | $315.48 | $3.2M | filing |
| 2026-02-21 | CGNX | COGNEX CORP | Option exercise | 2,913 | $0.00 | $0.00 | filing |
| 2026-02-20 | MKSI | MKS INC | Sale | 13,310 | $256.05 | $3.4M | filing |
| 2026-02-20 | MKSI | MKS INC | Sale | 12,812 | $256.93 | $3.3M | filing |
| 2026-02-20 | MKSI | MKS INC | Sale | 1,988 | $257.81 | $512,523.10 | filing |
| 2026-02-20 | MKSI | MKS INC | Sale | 1,890 | $259.70 | $490,839.05 | filing |
| 2026-02-18 | CGNX | COGNEX CORP | Option exercise | 8,324 | $0.00 | $0.00 | filing |
| 2026-02-17 | MKSI | MKS INC | Tax withholding | 32,548 | $260.74 | $8.5M | filing |
| 2026-02-17 | MKSI | MKS INC | Option exercise | 7,654 | — | — | filing |
| 2026-02-17 | MKSI | MKS INC | Option exercise | 22,088 | — | — | filing |
| 2026-02-17 | MKSI | MKS INC | Option exercise | 3,859 | — | — | filing |
| 2026-02-17 | MKSI | MKS INC | Option exercise | 7,208 | — | — | filing |
| 2026-02-17 | MKSI | MKS INC | Option exercise | 16,989 | — | — | filing |
| 2026-02-17 | MKSI | MKS INC | Option exercise | 12,091 | — | — | filing |
| 2025-10-31 | MKSI | MKS INC | Tax withholding | 2,003 | $143.71 | $287,851.13 | filing |
| 2025-10-31 | MKSI | MKS INC | Option exercise | 352 | — | — | filing |
| 2025-10-31 | MKSI | MKS INC | Option exercise | 1,651 | — | — | filing |
Insider transactions from SEC Form 4 filings via EDGAR. Names appear as filed and aren't normalized across issuers.