MKSI MKS INC
Price Chart
Executive Summary
Five MKSI insiders sold $7.60M in open-market shares over a 7-day window, including the CEO ($3.15M) and CFO ($2.78M). At $22.2B market cap, the cluster represents only ~0.034% of market cap, which is trivial by proportionality standards. Insider sells are weak predictors per academic literature, and CEO/CFO sales at similar prices on the same date (May 22) may share a vesting or 10b5-1 catalyst — not necessarily a bearish signal.
Key Financial Metrics
Actionable Insight
This insider sell cluster is too small relative to MKSI's $22.2B market cap to be actionable on its own. Monitor next quarterly filing for any guidance revision or segment trends, but the sell pattern (tight window, similar prices for CEO/CFO) suggests pre-planned diversification rather than informed bearish view. The cross-filing amplifiers in the calibration data do not override the proportionality floor.
Key Facts
- 5 insiders sold open-market shares totaling $7.60M from May 22-27, 2026
- CEO John Lee sold 10,000 shares at $315.48 for $3.15M
- CFO Ramakumar Mayampurath sold 8,810 shares at $315.48 for $2.78M
- All trades were open-market sales (code S) — no option exercises or tax-withholding events
- Total cluster value is ~0.034% of $22.2B market cap — well below 0.1% trivial threshold
- Recent 30d insider activity: 8 prior sells totaling $8.8M — this cluster continues a routine selling pattern
- 85% of analysts rate MKSI as Strong Buy/Buy — no fundamental red flags
Financial Impact
Total insider sales of $7.60M, representing 0.034% of market cap — trivial relative to company size
Risk Factors
- CEO and CFO both selling on same date (May 22) could indicate coordinated 10b5-1 plan — still carries no near-term signal
- Insider selling pace ($16.4M over 30 days including this cluster) may accelerate if stock continues to rally
- Historical calibration shows score=2/3 filings on MKSI have poor T+20 predictive power — this cluster is unlikely to be an exception
Market Snapshot
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-MKSI-1779991701602 |
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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