Ignore this cluster entirely. The $6.91M in sales equals ~3 basis points of MKSI's market cap — an economically trivial amount. CEO and CFO selling the same day at the same price is a classic blackout-window-opening pattern, not a coordinated bearish signal. The stock's significant positive drift over the past 60 days (T+20 alpha of +6% to +15% on recent neutral reads) has likely created normal portfolio-rebalancing liquidity needs. No trading action warranted.
Price Chart
Executive Summary
CEO, CFO, and two other executives sold a total of $6.9M in open-market sales over a 6-day window—the second cluster this month. The $3.15M CEO sale and $2.78M CFO sale on the same day at the same price ($315.48) are the most notable, but at 0.03% of the $22.2B market cap, the dollar amounts are trivial relative to the company's size and well within the routine liquidity/routine-pattern range. No informational signal is conveyed by this cluster.
Key Financial Metrics
Key Facts
- President & CEO John Lee sold 10,000 shares for $3.15M on May 22, 2026 at $315.48/share.
- EVP & CFO Ramakumar Mayampurath sold 8,810 shares for $2.78M on May 22, 2026 at $315.48/share.
- EVP Henry David Philip sold 2,500 shares for $826K on May 26, 2026 at $330.50/share.
- Director Gerald Colella sold 464 shares for $153K on May 27, 2026 at $330.38/share.
- Total cluster value = $6.91M, representing ~0.03% of the company's $22.2B market capitalization.
- All four trades are open-market sales — no 10b5-1 plan status disclosed, but the low dollar amount relative to market cap makes plan-driven vs discretionary distinction immaterial.
- Historical performance on MKSI shows strong positive realized alpha (+9.75% avg T+20) with 83% win rate, but this cluster's trivial size makes it non-informative.
Financial Impact
Total insider sales of $6.91M, which is 0.03% of the $22.2B market cap — well below the 0.1% materiality threshold.
Risk Factors
- Even small-scale insider sales can occasionally flag bad news that later becomes public, but here the dollar amounts are too small relative to market cap to carry predictive power (Alldredge 2019); cluster sales are not more informative than non-cluster sales.
- The cross-filing calibration shows all rule pairs as AMPLIFIERS, but no actual cross-filings (earnings, agreement, offering, etc.) are present in the provided context — these generic model priors should not override the clear proportionality analysis.
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-1779991501669 |
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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