The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Williams John Edward since 2018.
This trader's CIK number is 1710173.
At the time of last reporting, Williams John Edward was the EVP & GM, PSD of Mks Inc. (stock ticker symbol MKSI).
Also see all insider trading activities at Mks Inc.
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2025 | MKSI | 0 | $0 | 0 | $0 | 5,400 | $0 |
| 2024 | MKSI | 0 | $0 | 1,800 | $213,678 | 946 | $0 |
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2018 | ESIO | 0 | $0 | 5,000 | $90,275 | 0 | $0 |
2. Electro Scientific Industries Inc (ESIO)
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-08-15 | MKSI | Option Ex | 947 | .00 | 0 |
| 2025-04-17 | MKSI | Option Ex | 1,740 | .00 | 0 |
| 2025-02-18 | MKSI | Option Ex | 2,713 | .00 | 0 |
| 2024-08-16 | MKSI | Sale | 1,800 | 118.71 | 213,678 |
| 2024-08-15 | MKSI | Option Ex | 946 | .00 | 0 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2018-02-28 | ESIO | Sale | 5,000 | 18.05 | 90,275 |
Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Williams John Edward (EVP & GM, PSD of Mks Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.