The dollar amount is immaterial relative to MKSI's $21.7B market cap. CEO/CFO co-selling on the same day is likely driven by shared blackout-window opening or 10b5-1 plan timing, not a coordinated bearish view. Monitor for any material adverse news in the next 8-K, but this cluster alone does not warrant action.
Price Chart
Executive Summary
Three MKSI insiders, including the CEO and CFO, sold a combined $6.34M in open-market sales over a 7-day window. The CEO and CFO both sold on May 22 at $315.48, accounting for $5.93M of the total. At $21.7B market cap, the cluster represents ~0.03% of market cap — well below the 0.1% materiality threshold — making this a routine, liquidity-driven event despite the C-suite participation.
Key Financial Metrics
Key Facts
- CEO Lee John Tseng-Chung sold 10,000 shares for $3.15M on May 22, 2026
- CFO Mayampurath Ramakumar sold 8,810 shares for $2.78M on May 22, 2026
- Director Peter Cannone III sold 1,400 shares for $410K on May 18, 2026
- Total cluster value of $6.34M represents ~0.03% of $21.7B market cap
- All three transactions were open-market sales (code S)
Financial Impact
Total insider sales of $6.34M, or ~0.03% of market cap — trivial relative to company size
Risk Factors
- CEO and CFO selling simultaneously could be misinterpreted by the market as a negative signal
- If a material adverse event emerges in the next 30 days, these sales may be viewed as informed in hindsight
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-MKSI-1779819559345 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 1, 2026 4w ago | 144 | $246.44 $265.36 | ▲ +7.68% | ▲ +7.36% | $282.86 (+14.78%) |
Jul 13, 2026 11w ago | Press Release | $352.03 $290.59 | ▼ −17.45% | ▼ −20.64% | $282.86 (−19.65%) |
Jun 8, 2026 16w ago | Insider Cluster | $312.09 $368.06 | ▲ +17.93% | ▲ +16.30% | $282.86 (−9.37%) |
Jun 2, 2026 17w ago | Insider Cluster | $329.66 $411.05 | ▲ +24.69% | ▲ +26.51% | $282.86 (−14.20%) |
Jun 2, 2026 17w ago | Insider Cluster | $329.66 $411.05 | ▲ +24.69% | ▲ +26.51% | $282.86 (−14.20%) |
May 28, 2026 18w ago | Insider Cluster | $323.41 $410.31 | ▲ +26.87% | ▲ +29.56% | $282.86 (−12.54%) |
May 28, 2026 18w ago | Insider Cluster | $323.41 $410.31 | ▲ +26.87% | ▲ +29.56% | $282.86 (−12.54%) |
May 26, 2026 18w ago | Insider Cluster | $332.43 $389.17 | ▲ +17.07% | ▲ +19.33% | $282.86 (−14.91%) |
May 26, 2026 18w ago | Insider Cluster | $332.43 $389.17 | ▲ +17.07% | ▲ +19.33% | $282.86 (−14.91%) |
May 19, 2026 19w ago | Insider Cluster | $293.92 $366.31 | ▲ +24.63% | ▲ +22.37% | $282.86 (−3.76%) |
US Market Status
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