MKSI MKS INC
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
Actionable Insight
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.
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
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 | ||||
|---|---|---|---|---|---|
|
Jun 8, 2026
6d ago
|
Insider Cluster
| $318.94 awaiting T+1 | awaiting T+1 | — | $355.69 (+11.52%) |
|
Jun 2, 2026
12d ago
|
Insider Cluster
| $329.66 $334.97 | ▲ +1.61% | ▲ +2.33% | $355.69 (+7.90%) |
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Jun 2, 2026
12d ago
|
Insider Cluster
| $329.66 $334.97 | ▲ +1.61% | ▲ +2.33% | $355.69 (+7.90%) |
|
May 28, 2026
17d ago
|
Insider Cluster
| $323.41 $322.60 | ▼ −0.25% | ▼ −0.49% | $355.69 (+9.98%) |
|
May 28, 2026
17d ago
|
Insider Cluster
| $323.41 $322.60 | ▼ −0.25% | ▼ −0.49% | $355.69 (+9.98%) |
|
May 26, 2026
19d ago
|
Insider Cluster
| $332.43 $326.37 | ▼ −1.82% | ▼ −1.84% | $355.69 (+7.00%) |
|
May 26, 2026
19d ago
|
Insider Cluster
| $332.43 $326.37 | ▼ −1.82% | ▼ −1.84% | $355.69 (+7.00%) |
|
May 19, 2026
26d ago
|
Insider Cluster
| $293.92 $311.24 | ▲ +5.89% | ▲ +4.85% | $355.69 (+21.02%) |
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May 15, 2026
4w ago
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Insider Cluster
| $302.72 $295.27 | ▼ −2.46% | ▼ −2.40% | $355.69 (+17.50%) |
|
May 11, 2026
5w ago
|
Insider Cluster
| $318.37 $311.57 | ▼ −2.14% | ▼ −2.00% | $355.69 (+11.72%) |
US Market Status
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