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