The cluster is too small relative to market cap to warrant a directional trade. Monitor for any upcoming 8-K or earnings release that could explain the selling, but the pattern is consistent with routine portfolio diversification and 10b5-1 plan activity. No immediate action required.
Price Chart
Executive Summary
Three MKSI insiders sold a total of $2.75M in open-market transactions over a one-week window, including the EVP of Global Strategic Marketing & GM of MSD ($1.89M), the SVP & Chief Accounting Officer ($767K), and a director ($95K). At a $20.4B market cap, the total represents ~0.013% — well below the 0.1% materiality threshold — and the cluster is dominated by sales, which per the literature are weak predictors. The historical calibration shows this segment's average net alpha at T+20 is -2.31% after costs, and the score-6/7/8 observed probabilities are all below 35%, further supporting a neutral, low-impact read.
Key Financial Metrics
Key Facts
- Three insiders sold a combined $2.75M in open-market sales over 7 days
- EVP David Philip Henry sold $1.89M (6K shares at ~$314.43)
- SVP & CAO Michelle McCarthy sold $767K (2.4K shares at ~$315.23)
- Director Elizabeth Mora sold $95K (300 shares at ~$318.02)
- Total sales represent ~0.013% of MKSI's $20.4B market cap
- No insider purchases were reported in the cluster window
- Prior 30-day insider activity shows 10 sells totaling $11.1M, consistent with routine selling pattern
Financial Impact
Total insider sales of $2.75M represent ~0.013% of market cap — immaterial
Risk Factors
- Insider sales could accelerate if broader sector headwinds emerge
- Larger unannounced sales by C-suite could appear in subsequent filings
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-1780930484140 |
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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