Who
John Tseng-Chung Lee
President & CEO
Company insider
Files Form 4 as: President & CEO, Mks; Director, Cognex.
In numbers
- Trades disclosed
- 432
- Buys
- 3
- Sells
- 23
- Bought
- $31K
- Sold
- $33.1M
- Companies
- 2
- Companies where not an officer
- 1
- First trade
- 10 Oct 2007
- Last trade
- 14 Aug 2026
- Last filed
- 17 Aug 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 14 Aug 2026filed 17 Aug 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.0M10,000 at $302.01 | filing |
| 14 Aug 2026filed 17 Aug 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.0M10,000 at $302.01 | filing |
| 22 May 2026filed 26 May 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.2M10,000 at $315.48 | filing |
| 22 May 2026filed 26 May 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.2M10,000 at $315.48 | filing |
| 21 Feb 2026filed 24 Feb 2026 | CGNX CognexLife-science tools | SEC FORM 4 Code M | —2,913 at $0.00 | filing |
| 21 Feb 2026filed 24 Feb 2026 | CGNX Cognexoption or derivative · Life-science tools | SEC FORM 4 Code M | —2,913 at $0.00 | filing |
| 21 Feb 2026filed 24 Feb 2026 | CGNX Cognexoption or derivative · Life-science tools | SEC FORM 4 Code M | —2,913 at $0.00 | filing |
| 21 Feb 2026filed 24 Feb 2026 | CGNX CognexLife-science tools | SEC FORM 4 Code M | —2,913 at $0.00 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.4M13,310 at $256.05 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.3M12,812 at $256.93 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $513K1,988 at $257.81 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $491K1,890 at $259.70 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.4M13,310 at $256.05 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $3.3M12,812 at $256.93 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $513K1,988 at $257.81 | filing |
| 20 Feb 2026filed 23 Feb 2026 | MKSI MksLife-science tools | SEC FORM 4 Sold | $491K1,890 at $259.70 | filing |
| 18 Feb 2026filed 19 Feb 2026 | CGNX CognexLife-science tools | SEC FORM 4 Code M | —8,324 at $0.00 | filing |
| 18 Feb 2026filed 19 Feb 2026 | CGNX Cognexoption or derivative · Life-science tools | SEC FORM 4 Code M | —8,324 at $0.00 | filing |
| 18 Feb 2026filed 19 Feb 2026 | CGNX Cognexoption or derivative · Life-science tools | SEC FORM 4 Code M | —8,324 at $0.00 | filing |
| 18 Feb 2026filed 19 Feb 2026 | CGNX CognexLife-science tools | SEC FORM 4 Code M | —8,324 at $0.00 | filing |
News
Head to Head Survey: POET Technologies (NASDAQ:POET) versus MKS (NASDAQ:MKSI)MKSI · dailypolitical.com · 25 Oct 2026MKS (NASDAQ:MKSI) and MaxLinear (NASDAQ:MXL) Head to Head ReviewMKSI · themarketsdaily.com · 17 Oct 2026Analyzing Magnachip Semiconductor (NYSE:MX) & MKS (NASDAQ:MKSI)MKSI · themarketsdaily.com · 14 Oct 2026
0 headlines in the last 90 days name John Tseng-Chung Lee; 3 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.