The cluster is too small relative to market cap to signal material information. Monitor next quarterly earnings (2.02) for any fundamental deterioration; the strong historical win rate on ARCB reports suggests the stock may have near-term momentum, but this filing alone does not change the outlook.
Price Chart
Executive Summary
Two ARCB insiders — a director and the CHRO — sold a combined $1.08M in open-market sales on the same day. The $863K sale by the CHRO represents the bulk of the cluster, but at 0.03% of ARCB's $3.2B market cap, the total is trivial and likely driven by routine portfolio diversification or tax planning rather than a bearish signal. The historical win rate on ARCB reports is strong (75% T+20), but this cluster lacks material dollar weight to warrant a directional call.
Key Financial Metrics
Key Facts
- Director Judy R. McReynolds sold 1,500 shares at $144.78 for $217,170 on 2026-08-04.
- CHRO Erin K. Gattis sold 6,163 shares at $140.00 for $862,820 on 2026-08-04.
- Total insider sales of $1.08M represent ~0.03% of ARCB's $3.2B market cap — well below the 0.1% materiality threshold.
- Both sales were open-market (code S); no 10b5-1 plan designation was noted in the filing.
Financial Impact
Total insider sales of $1.08M, representing 0.03% of market cap.
Risk Factors
- Insider sales could accelerate if the stock continues to rally, but current volume is routine.
- No fundamental catalyst identified — the cluster is likely liquidity-driven.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-ARCB-1786039688262 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 15, 2026 6w ago | Institutional Cluster | $145.87 $134.80 | ▼ −7.59% | ▼ −5.61% | $133.74 (−8.31%) |
Aug 12, 2026 7w ago | Insider Cluster | $146.74 $134.86 | ▼ −8.10% | ▼ −6.35% | $133.74 (−8.86%) |
Aug 10, 2026 7w ago | Insider Cluster | $137.43 $138.10 | ▲ +0.48% | ▲ +1.40% | $133.74 (−2.68%) |
Aug 7, 2026 8w ago | Insider Cluster | $137.76 $141.12 | ▲ +2.44% | ▲ +2.84% | $133.74 (−2.91%) |
Aug 6, 2026 8w ago | Insider Cluster | $135.25 $137.34 | ▲ +1.55% | ▲ +0.95% | $133.74 (−1.11%) |
Aug 6, 2026 8w ago | Insider Cluster | $135.25 $137.34 | ▲ +1.55% | ▲ +0.95% | $133.74 (−1.11%) |
Jul 24, 2026 10w ago | 8-K | $154.30 $140.34 | ▼ −9.05% | ▼ −12.67% | $133.74 (−13.32%) |
Jun 4, 2026 17w ago | 8-K | $155.09 $142.37 | ▼ −8.20% | ▼ −10.06% | $133.74 (−13.76%) |
May 18, 2026 19w ago | 8-K | $118.70 $145.85 | ▲ +22.87% | ▲ +21.89% | $133.74 (+12.67%) |
Apr 24, 2026 23w ago | 8-K | $122.38 $124.41 | ▲ +1.66% | ▼ −2.37% | $133.74 (+9.29%) |
US Market Status
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