The CEO+CFO same-day cluster sale is a modest bearish signal per insider-trading literature, but the dollar amount is immaterial at 0.01% of market cap. Monitor for any upcoming 8-K filing (earnings, guidance, or material agreement) that may have prompted the selling — the cluster occurred near all-time highs. Given the stock's strong run (+41.5% T+20 on the last neutral report), this could be routine profit-taking rather than informed selling. Watch for any Form 144 filings or additional insider sales in the next 30 days to confirm pattern.
Price Chart
Executive Summary
CEO Robert Mionis and CFO Mandeep Chawla sold a combined ~$3.9M in open-market sales on July 31, 2026, representing ~0.01% of CLS's $38.1B market cap. While the dollar value is trivial relative to market cap, the cluster involves both top C-suite executives selling on the same day, which per academic literature is a modestly bearish signal, though the proportionality check shows the amount is immaterial. The historical calibration shows past CLS reports had strong positive T+20 performance (avg +11.59%), but the observed_p for score-7 filings is only 43-44% with negative average losses on misses, suggesting caution against over-scoring.
Key Financial Metrics
Key Facts
- CEO Robert Mionis sold 7,843 shares across 10 trades on July 31, 2026, totaling ~$3.42M at prices from $360.47 to $374.49.
- CFO Mandeep Chawla sold 883 shares across 10 trades on July 31, 2026, totaling ~$338,635 at prices from $360 to $374.03.
- Combined open-market sales by CEO and CFO on same day: ~$3.76M, representing ~0.01% of CLS's $38.1B market cap.
- Both executives sold at prices near all-time highs (stock ~$360-374 range), suggesting potential profit-taking at elevated valuation.
- No 10b5-1 plan pattern evident — sales were concentrated on a single day across multiple price points, indicating discretionary selling.
- Prior 30-day insider activity shows 10 sells totaling $2.5M, making this cluster a significant acceleration in insider selling.
Financial Impact
~$3.76M in open-market sales by CEO and CFO on a single day, but only ~0.01% of $38.1B market cap — economically trivial.
Risk Factors
- Insider selling at all-time highs may signal management's view that the stock is fully valued.
- Concentrated same-day selling by both CEO and CFO could indicate upcoming negative news (earnings miss, guidance cut) that they are front-running.
- No 10b5-1 plan disclosed — sales appear discretionary, increasing the informational content.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-CLS-1785795658443 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 24, 2026 7d ago | Insider Cluster | $365.44 $356.53 | ▼ −2.44% | ▼ −1.69% | $373.09 (+2.09%) |
Sep 11, 2026 20d ago | 8-K | $316.08 $316.81 | ▲ +0.23% | ▲ +0.69% | $373.09 (+18.04%) |
Aug 26, 2026 5w ago | Institutional Cluster | $317.38 $298.70 | ▼ −5.89% | ▼ −5.66% | $373.09 (+17.55%) |
Aug 7, 2026 8w ago | Insider Cluster | $317.83 $314.59 | ▼ −1.02% | ▼ −0.99% | $373.09 (+17.39%) |
Aug 7, 2026 8w ago | Insider Cluster | $317.83 $314.59 | ▼ −1.02% | ▼ −0.99% | $373.09 (+17.39%) |
Aug 3, 2026 8w ago | Insider Cluster | $371.15 $362.76 | ▲ +2.26% | ▲ +2.06% | $373.09 (−0.52%) |
Jul 27, 2026 9w ago | Press Release | $350.20 $328.43 | ▼ −6.22% | ▼ −4.68% | $373.09 (+6.54%) |
Jun 18, 2026 15w ago | Insider Cluster | $372.55 $376.84 | ▲ +1.15% | ▲ +1.47% | $373.09 (+0.14%) |
Apr 28, 2026 22w ago | 8-K | $361.54 $376.54 | ▲ +4.15% | ▲ +4.16% | $373.09 (+3.19%) |
Apr 27, 2026 22w ago | 8-K | $361.54 $360.65 | ▼ −0.25% | ▼ −0.24% | $373.09 (+3.19%) |
US Market Status
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