The director's selling of ~1.4% of the company's float in two days is the standout signal. While cluster sells are often liquidity-driven, the magnitude here is unusual and not explained by routine 10b5-1 plans (no evidence provided). Monitor for any near-term news (e.g., upcoming data readout, FDA interaction) that could have prompted the sale. If the stock weakens, the selling pressure could accelerate given the prior month's $72M in sales.
Price Chart
Executive Summary
Director Jason P. Rhodes sold ~$65.2M worth of DYN shares (1.4% of market cap) in a cluster over two days, while CEO John Cox made a minor $131K sale. This is the largest insider sale at Dyne in the current reporting window and occurs against a backdrop of heavy institutional ownership and a bullish analyst consensus. The sheer size and concentration of the sales, particularly the director's, warrant attention despite the academic literature discounting the predictive power of cluster sales.
Key Financial Metrics
Key Facts
- Director Jason P. Rhodes sold ~2.5M shares for ~$65.2M on August 13-14, 2026.
- CEO John Cox sold 4,986 shares for ~$131K on August 13, 2026.
- Total insider sales of ~$65.3M represent ~1.4% of DYN's $4.8B market cap.
- All sales were open-market transactions (code S).
- Prior 30-day insider activity: 9 sells totaling $72.0M.
- Analyst consensus is 90% bullish (19 Buy/7 Strong Buy, 2 Hold).
Financial Impact
~$65.3M in insider selling (1.4% of $4.8B market cap)
Risk Factors
- Potential upcoming negative catalyst (e.g., clinical data miss, regulatory setback) that motivated the large insider sale.
- Further insider selling by remaining large holders if the stock declines.
- High institutional ownership (BlackRock, Fidelity, State Street) could exacerbate sell-off if they reduce positions.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-DYN-1787034007865 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 17, 2026 6w ago | Insider Cluster | $26.15 $17.90 | ▲ +31.55% | ▲ +29.57% | $15.20 (+41.87%) |
Aug 14, 2026 6w ago | 144 | $26.15 $18.52 | ▼ −29.18% | ▼ −27.65% | $15.20 (−41.87%) |
Aug 13, 2026 7w ago | 144 | $25.70 $18.52 | ▲ +27.94% | ▲ +25.95% | $15.20 (+40.86%) |
Aug 13, 2026 7w ago | 144 | $25.70 $18.52 | ▼ −27.94% | ▼ −25.95% | $15.20 (−40.86%) |
Aug 13, 2026 7w ago | 144 | $25.70 $18.52 | ▼ −27.94% | ▼ −25.95% | $15.20 (−40.86%) |
Jul 29, 2026 9w ago | Press Release | $25.73 $26.09 | ▲ +1.40% | ▼ −2.57% | $15.20 (−40.92%) |
Jul 22, 2026 10w ago | Press Release | $23.21 $26.78 | ▼ −15.38% | ▼ −12.48% | $15.20 (+34.51%) |
Jul 20, 2026 10w ago | 8-K | $23.45 $26.15 | ▲ +11.51% | ▲ +7.39% | $15.20 (−35.18%) |
Jun 30, 2026 13w ago | Insider Cluster | $21.79 $25.10 | ▲ +15.19% | ▲ +17.38% | $15.20 (−30.24%) |
Jun 29, 2026 13w ago | 144 | $22.21 $25.63 | ▼ −15.40% | ▼ −16.43% | $15.20 (+31.56%) |
US Market Status
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