John Tseng-Chung Lee
CIK 1414656 · President & CEO · last filed 2026-05-26
John Tseng-Chung Lee is a President & CEO who has filed 106 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing shows the insider sold $3.2M of MKSI on May 26, 2026. Across all open-market trades the lifetime net is −$15.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $53.0M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$53.05M
2
106
-$15.93M
Holdings By Company
Recent Filings
106 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-26 | MKSI | Sell (S) | −10,000 | -$3.15M | EDGAR |
| 2026-02-24 | CGNX | Exer (M) | +2,913 | $0 | EDGAR |
| 2026-02-23 | MKSI | Sell (S) | −30,000 | -$7.70M | EDGAR |
| 2026-02-19 | CGNX | Mixed | +8,324 | $0 | EDGAR |
| 2026-02-18 | MKSI | Mixed | +37,340 | -$8.49M | EDGAR |
| 2026-02-09 | MKSI | Grant (A) | — | $0 | EDGAR |
| 2025-11-04 | MKSI | Mixed | — | -$287.9K | EDGAR |
| 2025-05-12 | CGNX | Exer (M) | +1,848 | $0 | EDGAR |
| 2025-02-24 | CGNX | Exer (M) | +8,720 | $0 | EDGAR |
| 2025-02-20 | CGNX | Grant (A) | — | $0 | EDGAR |