| 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 |
|---|---|---|---|---|---|---|---|---|---|
Insider activity in MKSI over the last quarter tilts toward selling: insiders offloaded a net 10,300 shares worth roughly $3.1M.
MKSI sits in the Electronic Equipment, Instruments & Components industry within the Information Technology sector, so this activity is best read against the sector's broader insider trend.
| Role | Insider | Shares | Value | 30d |
|---|---|---|---|---|
| CEO | 134.8K | $40.70M | - | |
| VP | 49.4K | $15.82M | - | |
| Dir | 20.0K | $6.78M | - | |
| COO | 19.2K | $6.63M | - | |
| Dir | 18.8K | $4.73M | - |
Buys and sells only
| Date | Insider | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Feb 20, 2026 | Lee John Tseng-Chung | President &CEO | Sell | 30,000 | $256.77 | $7,703,242.04 | -16.2% | +20.8% | - | |
| Dec 2, 2025 | Mora Elizabeth56 | Director | Sell10b5-1 | 300 | $158.81 | $47,643.00 | -1.6% | +51.7% | - | |
| Oct 22, 2025 | Schreiner James Alan | EVP &COO | Sell10b5-1 | 711 | $138.68 | $98,601.48 | -3.1% | +56.7% | +45.9% | |
| Oct 1, 2025 | Moloney Jacqueline F51 | Director | Sell10b5-1 | 300 | $122.14 | $36,642.00 | -2.5% | +23.3% | +106.6% | |
| Sep 18, 2025 | Schreiner James Alan | EVP &COO | Sell10b5-1 | 838 | $124.00 | $103,912.00 | -3.5% | +14.5% | +94.0% | |
| Sep 18, 2025 | Henry David Philip52 | EVP, Global Str Mktg &Gm, Msd | Sell10b5-1 | 5,000 | $130.00 | $650,000.00 | -24.3% | +14.5% | +94.0% | |
| Sep 2, 2025 | Mora Elizabeth56 | Director | Sell10b5-1 | 300 | $99.85 | $29,955.00 | -1.5% | +53.0% | +146.6% | |
| Aug 1, 2025 | Moloney Jacqueline F51 | Director | Sell10b5-1 | 300 | $92.10 | $27,630.00 | -2.5% | +50.2% | +220.7% | |
| Jul 7, 2025 | Schreiner James Alan | EVP &COO, Msd | Sell10b5-1 | 957 | $102.44 | $98,035.08 | -4.0% | +36.5% | +242.1% | |
| Jul 3, 2025 | Henry David Philip52 | EVP, Operations &Corp Mktg | Sell10b5-1 | 2,000 | $105.00 | $210,000.00 | -8.9% | +25.6% | +249.6% |