Lee John Tseng-Chung
Insider transactions at 2 companies
This page shows all SEC Form 4 filings attributed to Lee John Tseng-Chung. Form 4 disclosures are required whenever a corporate insider — director, officer, or 10%+ shareholder — buys, sells, or receives company stock. Each row represents a separate reported transaction. All data is sourced directly from the SEC EDGAR public database.
| Company | Title | Type | Shares | Price | Value | Date |
|---|---|---|---|---|---|---|
| MKSI | President & CEO | Option Exercise | 352 | — | — | Oct 31, 2025 |
| CGNX | Option Exercise | 1,848 | — | — | May 9, 2025 | |
| CGNX | Option Exercise | 6,973 | — | — | Feb 21, 2025 | |
| MKSI | President & CEO | Option Exercise | 14,041 | — | — | Feb 18, 2025 |
| MKSI | President & CEO | Option Exercise | 2,010 | — | — | Dec 6, 2024 |
| CGNX | Option Exercise | 1,109 | — | — | May 9, 2024 | |
| CGNX | Option Exercise | 1,166 | — | — | Feb 21, 2024 | |
| MKSI | President & CEO | Option Exercise | 23,093 | — | — | Feb 15, 2024 |
| MKSI | President & CEO | Option Exercise | 160 | — | — | Dec 1, 2023 |
| CGNX | Option Exercise | 740 | — | — | May 9, 2023 | |
| MKSI | President & CEO | Tax Withholding | 20,862 | $100.29 | $2,092,250 | Feb 15, 2023 |
| MKSI | President & CEO | Option Exercise | 9,624 | — | — | Feb 15, 2022 |
| MKSI | President & CEO | Option Exercise | 1,951 | — | — | Feb 16, 2021 |
| MKSI | President & CEO | Option Exercise | 2,755 | — | — | Feb 18, 2020 |
| MKSI | President & COO | Option Exercise | 257 | — | — | Feb 15, 2019 |
| MKSI | Sr. VP & COO | Sale | 11,832 | $115.31 | $1,364,348 | Feb 20, 2018 |
| MKSI | Sr. VP & COO | Option Exercise | 3,074 | — | — | Feb 15, 2018 |
| MKSI | Sr. VP & COO | Sale | 2,113 | $104.02 | $219,794 | Nov 13, 2017 |
| MKSI | Sr. VP & COO | Tax Withholding | 1,674 | $80.50 | $134,757 | May 11, 2017 |
| MKSI | Sr. VP & COO | Sale | 14,734 | $67.99 | $1,001,765 | Feb 22, 2017 |
| MKSI | Sr. VP & COO | Tax Withholding | 6,449 | $67.70 | $436,597 | Feb 15, 2017 |
| MKSI | Sr. VP & COO | Tax Withholding | 2,377 | $66.95 | $159,140 | Feb 10, 2017 |
| MKSI | Sr. VP, Business Units | Sale | 9,955 | $46.36 | $461,514 | Aug 10, 2016 |
| MKSI | Sr. VP, Business Units | Option Exercise | 2,863 | — | — | Feb 25, 2016 |
| MKSI | Sr. VP, Business Units | Option Exercise | 3,780 | — | — | Feb 16, 2016 |
| MKSI | Sr. VP, Business Units | Option Exercise | 2,870 | — | — | Feb 10, 2016 |
| MKSI | Sr. VP, Business Units | Award / Grant | 346 | $30.74 | $10,627 | May 29, 2015 |
| MKSI | Sr. VP, Business Units | Sale | 10,747 | $36.36 | $390,761 | May 14, 2015 |
| MKSI | Sr. VP, Business Units | Option Exercise | 2,863 | — | — | Feb 25, 2015 |
| MKSI | Sr. VP, Business Units | Option Exercise | 1,325 | — | — | Feb 23, 2015 |
| MKSI | Sr. VP, Business Units | Tax Withholding | 2,417 | $35.86 | $86,674 | Feb 10, 2015 |
| MKSI | Sr. VP, Business Units | Award / Grant | 431 | $24.33 | $10,483 | Nov 28, 2014 |
| MKSI | Sr. VP, Business Units | Sale | 9,128 | $29.55 | $269,732 | Jun 13, 2014 |
| MKSI | Sr. VP, Business Units | Award / Grant | 433 | $24.52 | $10,624 | May 30, 2014 |
| MKSI | Sr. VP, Business Units | Option Exercise | 1,333 | — | — | Feb 28, 2014 |
| MKSI | Sr. VP and GM, Business Units | Option Exercise | 2,105 | — | — | Feb 24, 2014 |
| MKSI | Sr. VP, HPS, Controls & PFMC | Purchase | 443 | $23.96 | $10,624 | Nov 29, 2013 |
| MKSI | Sr. VP, HPS, Controls & PFMC | Purchase | 520 | $20.42 | $10,627 | May 31, 2013 |
| MKSI | Sr. VP, HPS, Controls & PFMC | Sale | 8,160 | $27.64 | $225,542 | Mar 14, 2013 |
| MKSI | Sr. VP, HPS, Controls & PFMC | Option Exercise | 2,813 | — | — | Mar 4, 2013 |
| MKSI | Sr. VP, HPS, Controls & PFMC | Option Exercise | 1,332 | — | — | Feb 28, 2013 |
| MKSI | Sr. VP, HPS, Controls & PFMC | Option Exercise | 1,324 | — | — | Feb 25, 2013 |
| MKSI | Sr. VP, Controls & PFMC | Purchase | 479 | $20.61 | $9,875 | Nov 30, 2012 |
| MKSI | Sr. VP, Controls & PFMC | Sale | 2,868 | $26.67 | $76,490 | Aug 6, 2012 |
| MKSI | Sr. VP, Controls & PFMC | Award / Grant | 478 | $22.23 | $10,626 | May 31, 2012 |
| MKSI | Sr. VP, Controls & PFMC | Tax Withholding | 1,111 | $29.60 | $32,886 | Mar 16, 2012 |
| MKSI | Sr. VP, Controls & PFMC | Sale | 8,595 | $29.13 | $250,372 | Mar 9, 2012 |
| MKSI | Sr. VP, Controls & PFMC | Option Exercise | 2,083 | — | — | Mar 5, 2012 |
| MKSI | Sr. VP, Controls & PFMC | Option Exercise | 1,332 | — | — | Feb 28, 2012 |
| MKSI | Sr. VP, Controls & PFMC | Award / Grant | 491 | $21.62 | $10,623 | Nov 30, 2011 |