Skip to contentLee John Tseng-Chung — MKS INSTRUMENTS INC insider: 403 transactions · InsiderLensInsider trading activity of Lee John Tseng-Chung
- Transactions on record
- 403
- since Oct 11, 2007
- Open-market buys
- 3
- $31.1K
- Open-market sells
- 27
- $16.2M
- Companies traded
- 2
- last filing May 26, 2026
Figures computed from official regulatory filings — methodology.
Companies where Lee John Tseng-Chung has traded
Track record of Lee John Tseng-Chung
Insufficient history for a statistical track record (fewer than 5 open-market buys).
Transaction history of Lee John Tseng-Chung
Co-insiders of Lee John Tseng-Chung
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BANUCCI EUGENE GCOGNEX CORP
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| May 26, 2026 | Sell | -10,000 | 315.48 USD | $3.2M | SEC |
| Feb 24, 2026 | Exercise | 2,913 | 0.00 USD | $0 | SEC |
| Feb 24, 2026 | ExerciseD | -2,913 | 0.00 USD | $0 | SEC |
| Feb 23, 2026 | Sell | -12,812 | 256.93 USD | $3.3M | SEC |
| Feb 23, 2026 | Sell | -13,310 | 256.05 USD | $3.4M | SEC |
| Feb 23, 2026 | Sell | -1,890 | 259.70 USD | $490.8K | SEC |
| Feb 23, 2026 | Sell | -1,988 | 257.81 USD | $512.5K | SEC |
| Feb 19, 2026 | Exercise | 8,324 | 0.00 USD | $0 | SEC |
| Feb 19, 2026 | AwardD | 4,817 | 0.00 USD | $0 | SEC |
| Feb 19, 2026 | ExerciseD | -8,324 | 0.00 USD | $0 | SEC |
| Feb 18, 2026 | Exercise | 3,859.12 | — | — | SEC |
| Feb 18, 2026 | ExerciseD | -3,859.12 | — | — | SEC |
| Feb 18, 2026 | ExerciseD | -16,989.44 | — | — | SEC |
| Feb 18, 2026 | AwardD | 15,592.91 | — | — | SEC |
| Feb 18, 2026 | ExerciseD | -7,653.6 | — | — | SEC |
| Feb 18, 2026 | Other | -32,548.31 | 260.74 USD | $8.5M | SEC |
| Feb 18, 2026 | Exercise | 16,989.44 | — | — | SEC |
| Feb 18, 2026 | ExerciseD | -22,088.09 | — | — | SEC |
| Feb 18, 2026 | Exercise | 7,208 | — | — | SEC |
| Feb 18, 2026 | ExerciseD | -12,091 | — | — | SEC |
| Feb 18, 2026 | Exercise | 22,088.09 | — | — | SEC |
| Feb 18, 2026 | Exercise | 12,091 | — | — | SEC |
| Feb 18, 2026 | ExerciseD | -7,208 | — | — | SEC |
| Feb 18, 2026 | Exercise | 7,653.6 | — | — | SEC |
| Feb 9, 2026 | AwardD | 50,971.84 | — | — | SEC |