MKSI MKS INC
Price Chart
Executive Summary
Two MKSI insiders, including the CEO, sold a combined $3.56M in open-market sales over a 7-day window. The CEO's $3.15M sale is the dominant event, representing ~0.016% of the $21.7B market cap — a trivial proportion. The cluster is small relative to company size and lacks a clear catalyst, making it a routine liquidity event.
Key Financial Metrics
Actionable Insight
The CEO's $3.15M sale is notable in absolute terms but trivial relative to MKSI's $21.7B market cap. Without a 10b5-1 plan disclosure or a pattern of clustered selling, this is likely a routine diversification trade. Monitor for any subsequent Form 4 filings that might reveal a 10b5-1 plan or additional selling. The stock's strong analyst consensus (85% bullish) and the historical win rate on prior MKSI reports (71% at T+20) suggest the broader bullish narrative remains intact.
Key Facts
- CEO Lee John Tseng-Chung sold 10,000 shares at $315.48 for $3.15M on 2026-05-22
- Director Peter Cannone III sold 1,400 shares at $303.40 for $410K on 2026-05-18
- Total cluster value of $3.56M is ~0.016% of MKSI's $21.7B market cap
- Both sales were open-market (code S), not tax-withholding or derivative exercises
- No 10b5-1 plan information provided, but the CEO's sale is a single large transaction, not a recurring pattern
Financial Impact
Total insider sales of $3.56M, representing ~0.016% of market cap — immaterial relative to company size
Risk Factors
- CEO selling could be perceived negatively by the market if it precedes a negative catalyst, though no such catalyst is evident
- If additional insider sales emerge in the coming weeks, the cluster could become more material
Market Snapshot
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-MKSI-1779819379679 |
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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