Cox John - Insider Non-Derivative Transactions at Dyne Therapeutics, Inc. (DYN) - (SEC)
Updated on January 3, 2026.
According to recent SEC insider information filed on Dec 5, 2025, Cox John's relationship to Dyne Therapeutics, Inc. (DYN) is Director,Officer (CEO & President), and currently has 196,877 shares of Common Stock.
The chart below shows the number of shares owned, and the table shows the recent insider transactions.
You can see similar information for other DYN insiders.
Related Topics: SEC Topic List.
Data Source: SEC.
Cox John - Insider Non-Derivative Transactions of DYN Common Stock
Cox John - Insider Non-Derivative Transactions at DYN
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| Date | Transaction | No. of Shares | Price Per Share | Shares Owned After Transactions |
|---|---|---|---|---|
| Dec 6, 2025 | Sell -- (Common Stock) | 2662 | 20.72 | 196877 |
| Sep 6, 2025 | Sell -- (Common Stock) | 2640 | 13.41 | 199539 |
| Jul 16, 2025 | G -- (Common Stock) | 10000 | 0 | 202179 |
| Jul 16, 2025 | G -- (Common Stock) | 10000 | 0 | 212179 |
| Jul 16, 2025 | G -- (Common Stock) | 10000 | 0 | 222179 |
| Jul 16, 2025 | G -- (Common Stock) | 10000 | 0 | 232179 |
| Jul 15, 2025 | P -- (Common Stock) | 100000 | 9.11 | 242179 |
| Jun 6, 2025 | Sell -- (Common Stock) | 4060 | 13.35 | 142179 |
| Mar 6, 2025 | Sell -- (Common Stock) | 4061 | 11.83 | 146239 |
| Dec 5, 2024 | Acquisition -- (Common Stock) | 145300 | 0 | 150300 |
| Sep 5, 2024 | P -- (Common Stock) | 800 | 32.57 | 800 |
| Sep 5, 2024 | P -- (Common Stock) | 7200 | 33.09 | 8000 |
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