John Tseng-Chung Lee, Senior VP & COO at MKS INSTRUMENTS INC (MKSI), sold 4,226 shares at $104.02 ($440K) on 2017-11-13, disclosed to the SEC on 2017-11-14.
Open-market sale of $440k MKSI by Senior VP & COO. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Something here stands out, but not much.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $104.02 | 2,113 | $220K | 50.0% |
| 2 | $104.02 | 2,113 | $220K | 50.0% |
| Total | $104.02 avg | 4,226 | $440K | 100% |
| Filing → |
| MKSI | SELL | 2026-02-23 | $7.7M | — | Filing → |
| MKSI | SELL | 2018-02-21 | $2.9M | — | Filing → |
| MKSI | SELL | 2017-02-23 | $2.0M | — | Filing → |