This cluster is too small to warrant a trading signal. Monitor for any C-suite insider selling or a larger cluster (>0.5% of market cap) that would indicate a more informed bearish view. The next catalyst to watch is the upcoming quarterly earnings report.
Price Chart
Executive Summary
Two directors at Arrowhead Pharmaceuticals sold a combined $1.19M in open-market sales on August 18, 2026. This is a small cluster relative to the $12.6B market cap (0.009%), and both sellers are directors, not C-suite executives, which per academic literature makes cluster sales a weak signal. The sales are likely liquidity-driven and do not indicate a material bearish view on the company's prospects.
Key Financial Metrics
Key Facts
- Two directors sold shares on the same day: Michael S. Perry sold 11,600 shares at $87.30 ($1.01M), and Adeoye Y. Olukotun sold 2,000 shares at $86.96 ($174K).
- Total open-market sales of $1.19M represent only 0.009% of ARWR's $12.6B market cap, well below the 0.1% threshold for materiality.
- Both sellers are directors, not C-suite executives; insider sales by directors are less informative than sales by the CEO or CFO.
- No 10b5-1 plan or pattern information is available, but the small size and director status suggest routine portfolio diversification.
Financial Impact
$1.19M in insider sales, representing 0.009% of market cap
Risk Factors
- Insider sales could accelerate if management becomes concerned about upcoming clinical trial results or regulatory decisions.
- The stock is highly valued at $12.6B for a pre-commercial biotech; any pipeline setback could trigger significant downside.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-ARWR-1787292234568 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 10, 2026 22d ago | Institutional Cluster | $82.76 $67.74 | ▼ −18.15% | ▼ −17.65% | $64.19 (−22.43%) |
Aug 20, 2026 6w ago | Insider Cluster | $87.47 $88.59 | ▲ +1.28% | ▲ +0.17% | $64.19 (−26.61%) |
Jun 16, 2026 15w ago | 8-K | $81.04 $79.81 | ▼ −1.52% | ▼ −0.48% | $64.19 (−20.79%) |
US Market Status
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