Form 4 Filing for Dyne Therapeutics, Inc. - Officer/Director Stock Transactions

This filing details stock transactions by Dirk Kersten, a director at Dyne Therapeutics, Inc. On April 15, 2026, 81,840 shares of common stock were sold at a weighted average price of $20.2718, pursuant to a Rule 10b5-1 trading plan. On April 16, 2026, an additional 11,116 shares were sold at a weighted average price of $21.1039, and 6,657 shares were sold at a weighted average price of $20.0575, also under the trading plan. These transactions were indirect, with shares held by ForDyne B.V. The footnotes indicate complex ownership structures involving various Forbion entities and the reporting person’s role within them. Following these transactions, the post-transaction shares owned are 4,544,773.