John Tseng-Chung Lee, Senior VP, Controls & PFMC at MKS INSTRUMENTS INC (MKSI), sold 8,595 shares at $29.13 ($250K) on 2012-03-09, disclosed to the SEC on 2012-03-12.
Seasonal sale ($250k) by Senior VP, Controls & PFMC — this insider has traded MKSI in March in at least three consecutive prior years. Pattern-driven, low signal.
Nothing distinguishes this filing.
| Filing → |
| MKSI | SELL | 2026-02-23 | $7.7M | — | Filing → |
| MKSI | SELL | 2018-02-21 | $2.9M | — | Filing → |
| MKSI | SELL | 2017-11-14 | $440K | — | Filing → |