Cox John
SEC CIK 1498428 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| DYN | Dyne Therapeutics, Inc. | CEO, Pres, Dir | 357.5K | $1.97M | $581.3K | 14 | 2024-09-04 | 2026-09-08 |
Most active insiders at DYN, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Rhodes Jason P | Dir | — | $129.10M |
| 2 | Kersten Dirk | Dir | — | $38.57M |
| 3 | Cox John | CEO, Pres, Dir | — | $443.7K |
| 4 | Posner Brian S | Dir | $274.8K | — |
| 5 | Kerr Douglas | Chief Medical Off | — | $233.1K |
| 6 | Lucera Erick | CFO | — | $228.7K |
| 7 | Friedl-Naderer Johanna | Chief Commercial Off | — | $43.4K |
| 8 | Lubner David Charles | Dir | — | — |
Transactions 14
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| T | 2026-09-08 16:13 | 2026-09-08 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $18.88 | -5,658 | 357.5K | -2% | -$106.8K |
| T | 2026-08-17 16:07 | 2026-08-13 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $26.28 | -4,986 | 363.2K | -1% | -$131.0K |
| T | 2026-06-17 16:07 | 2026-06-16 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $18.33 | -2,683 | 368.2K | -0.7% | -$49.2K |
| T | 2026-05-14 16:02 | 2026-05-13 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $18.36 | -3,311 | 370.8K | -0.9% | -$60.8K |
| T | 2026-03-06 | 2026-03-05 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $14.90 | -2,732 | 374.1K | -0.7% | -$40.7K |
| D | 2026-02-17 | 2026-02-12 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | A - Grant | $0.00 | +180.0K | 376.9K | +91% | $0 |
| T | 2025-12-05 | 2025-12-05 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $20.72 | -2,662 | 196.9K | -1% | -$55.2K |
| T | 2025-09-09 | 2025-09-05 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $13.41 | -2,640 | 199.5K | -1% | -$35.4K |
| 2025-07-15 | 2025-07-14 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | P - Purchase | $9.11 | +100.0K | 242.2K | +70% | +$911.0K | |
| M | 2025-07-15 | 2025-07-15 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | G - Gift | $0.00 | -40.0K | 202.2K | -17% | $0 |
| T | 2025-06-06 | 2025-06-05 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $13.35 | -4,060 | 142.2K | -3% | -$54.2K |
| T | 2025-03-07 | 2025-03-05 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | S - Sale | $11.83 | -4,061 | 146.2K | -3% | -$48.0K |
| D | 2024-12-06 | 2024-12-04 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | A - Grant | $0.00 | +145.3K | 150.3K | +2,906% | $0 |
| MI | 2024-09-04 | 2024-09-04 | DYN | Dyne Therapeutics, Inc. | Cox John | CEO, Pres, Dir | P - Purchase | $33.04 | +32.0K | 800 | New | +$1.06M |
Purchase Sale Sale after option exercise All abbreviations