Cox John Insider Trading Activity
Cox John has been net-selling over the last 12 months with 1 purchase and 4 sales across 1 company.
DYN is the most-traded position with 5 trades. The largest single transaction was a purchase of DYN for $911K on Jul 14, 2025.
Performance Scorecard
Forward stock performance after each transaction by Cox John. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | +34.4% | +8.3% | 80% | 5 |
| 90 days | +54.0% | -12.3% | 40% | 5 |
| 120 days | +115.9% | -7.4% | 75% | 4 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersDYN · Dyne Therapeutics, Inc.
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Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| DYN | Dyne Therapeutics, Inc. | 6 | $1.2M |
Other insiders at Dyne Therapeutics, Inc.
5 other tracked filers at DYN.