CEO Cox's $2.24M sale is notable in absolute terms but trivial relative to MATX's $6.7B market cap. No bearish signal here — treat as routine portfolio diversification. Monitor next 8-K or earnings for any operational update that might have motivated the sale, but do not trade on this cluster alone.
Price Chart
Executive Summary
Chairman & CEO Matthew Cox sold $2.24M in open-market MATX shares on August 28, 2026, across three trades at ~$223-$225. Two EVPs also had small tax-withholding share surrenders (non-cash). The CEO's sales are material in absolute dollar terms but represent only ~0.03% of the $6.7B market cap, falling below the 0.1% proportionality threshold for routine sales. The cluster is entirely sells, but per academic literature, insider sales are weak predictors and cluster sells are not more informative than non-cluster sells — especially when driven by a single executive on a single day. This cluster does not change that baseline view.
Key Financial Metrics
Key Facts
- Chairman & CEO Matthew Cox sold 10,000 shares total (~$2.24M) in three open-market trades on August 28, 2026 at $223-$225
- Two EVPs had tax-withholding share surrenders totaling ~$35K — non-cash events with no economic signal
- Total cluster value of ~$2.27M represents ~0.03% of MATX's $6.7B market cap — well below the 0.1% materiality threshold
- No 10b5-1 plan indicated; single-day CEO selling pattern could be opportunistic but is not alarming at this scale
Financial Impact
CEO sold ~$2.24M of personal holdings, representing ~0.03% of market cap — immaterial from a supply/demand perspective
Risk Factors
- CEO selling could accelerate if stock continues to rally, creating overhang
- No 10b5-1 plan disclosed — future sales could be less predictable
- Water transportation sector is cyclical; any macro slowdown would hit MATX harder than this insider activity suggests
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-MATX-1788300182923 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 21, 2026 4d ago | Press Release | $227.48 $228.64 | ▲ +0.51% | ▲ +1.03% | $229.87 (+1.05%) |
Oct 20, 2026 5d ago | Press Release | $235.07 $227.48 | ▲ +3.23% | ▲ +2.05% | $229.87 (+2.21%) |
Aug 28, 2026 8w ago | Insider Cluster | $224.81 $219.26 | ▼ −2.47% | ▼ −1.78% | $229.87 (+2.25%) |
Aug 28, 2026 8w ago | Insider Cluster | $224.81 $219.26 | ▼ −2.47% | ▼ −1.78% | $229.87 (+2.25%) |
Aug 24, 2026 8w ago | Insider Cluster | $222.82 $221.65 | ▼ −0.53% | ▼ −0.55% | $229.87 (+3.16%) |
Aug 20, 2026 9w ago | Insider Cluster | $222.80 $222.68 | ▼ −0.05% | ▲ +0.24% | $229.87 (+3.17%) |
Aug 14, 2026 10w ago | Insider Cluster | $219.95 $218.28 | ▼ −0.76% | ▼ −0.08% | $229.87 (+4.51%) |
Aug 12, 2026 10w ago | Insider Cluster | $213.76 $217.30 | ▲ +1.66% | ▲ +1.85% | $229.87 (+7.54%) |
Jun 9, 2026 19w ago | Insider Cluster | $193.43 $198.98 | ▲ +2.87% | ▲ +1.17% | $229.87 (+18.84%) |
May 21, 2026 22w ago | Insider Cluster | $182.75 $181.84 | ▼ −0.50% | ▼ −0.94% | $229.87 (+25.78%) |
US Market Status
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