| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
President &CEO | Director | President &COO +2 more
2 companies
Lee John Tseng-Chung serves as a President &CEO at MKSI and has filed Form 4s across 2 companies. Across recent SEC filings that breaks down to 0 buys and 16 sells. Those positions are worth an estimated $40.7M at current prices.
The biggest single holding is MKSI (~$40.7M) as President &CEO. The recent filings there lean toward selling, a net 104,781 shares.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Aug 14, 2026 | MKSI Mks Inc. | President &CEO | Sell10b5-1 | 10,000 | $302.01 | $3,020,100.00 | -6.9% | - | - | |
| May 22, 2026 | MKSI Mks Inc. | President &CEO | Sell10b5-1 | 10,000 | $315.48 | $3,154,800.00 | -6.5% | -12.1% | - | |
| Feb 20, 2026 | MKSI Mks Inc. | President &CEO | Sell | 30,000 | $256.77 | $7,703,242.04 | -16.2% | +20.8% | - | |
| Feb 20, 2018 | MKSI Mks Inc | Sr. VP &COO | Sell | 13,432 | $115.38 | $1,549,781.86 | -100.0% | - | - | |
| Nov 13, 2017 | MKSI Mks Inc | Sr. VP &COO | Sell | 2,113 | $104.02 | $219,783.70 | -100.0% | - | - | |
| Feb 22, 2017 | MKSI Mks Inc | Sr. VP &COO | Sell | 14,734 | $67.99 | $1,001,764.66 | -100.0% | - | - | |
| Aug 10, 2016 | MKSI Mks Inc | Sr. VP, Business Units | Sell | 9,955 | $46.36 | $461,523.75 | -100.0% | - | - | |
| Feb 26, 2016 | MKSI Mks Inc | Sr. VP, Business Units | Sale+OE | 994 | $32.70 | $32,503.80 | -9.4% | - | - | |
| Feb 17, 2016 | MKSI Mks Inc | Sr. VP, Business Units | Sale+OE | 1,371 | $33.26 | $45,599.46 | -15.9% | - | - | |
| Feb 11, 2016 | MKSI Mks Inc | Sr. VP, Business Units | Sale+OE | 1,435 | $31.96 | $45,862.60 | -26.4% | - | - |