MKSI MKS INC
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
Actionable Insight
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.
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
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 | ||||
|---|---|---|---|---|---|
|
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%) |
|
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%) |
|
May 15, 2026
4w ago
|
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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