The insider selling is routine in size and composition, occurring after a strong earnings beat and raised guidance. No bearish signal — the cluster is consistent with normal post-earnings portfolio rebalancing. Monitor for any C-suite sales in the coming weeks, which would carry more weight.
Price Chart
Executive Summary
Three MKSI insiders sold a total of $2.75M in open-market sales within a week of the company reporting strong Q1 2026 results that beat guidance and raised Q2 outlook. The sales are modest relative to MKSI's $21.4B market cap (~0.013%), and the cluster includes two EVPs and one director, with no C-suite selling. The sales follow a strong earnings beat and raised guidance, suggesting routine portfolio diversification rather than a bearish signal.
Key Financial Metrics
Key Facts
- Three insiders sold a total of $2.75M in open-market sales over a 7-day window ending May 13, 2026.
- Sales represent ~0.013% of MKSI's $21.4B market cap — well below the 0.1% materiality threshold.
- No C-suite insiders (CEO, CFO, COO) sold; the sellers were two EVPs and one director.
- The cluster follows MKSI's May 6 earnings release: Q1 revenue of $1.078B (at high end of guidance), Non-GAAP EPS of $2.30 (above guidance), and Q2 revenue guidance of $1.2B (+11% QoQ).
- Seven director grants of 782 shares each (non-cash, $0 value) occurred on May 11, representing routine annual equity compensation.
- The company raised its quarterly dividend from $0.22 to $0.25 per share and prepaid $100M on its term loan in May 2026.
Financial Impact
Total insider sales of $2.75M, or 0.013% of market cap — immaterial relative to company size.
Risk Factors
- If additional large insider sales emerge in the next 30 days, the pattern could shift from routine to concerning.
- The convertible notes are convertible at holder option in Q2 2026, which could create dilution overhang if converted.
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-1778771583415 |
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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