Dyne Therapeutics, Inc. 4

Dirk Kersten, an indirect insider of Dyne Therapeutics, Inc., sold about 264K shares of Dyne common stock for roughly $5.5M under a Rule 10b5‑1 plan.

On June 22 and 23, 2026, Dirk Kersten, reporting as an indirect insider of Dyne Therapeutics, Inc. through ForDyne B.V., executed a series of open‑market sales of Dyne common stock under a pre‑arranged Rule 10b5‑1 trading plan, selling an aggregate 263,962 shares at weighted average prices between approximately $20.57 and $21.47 per share, for total proceeds of roughly $5.5 million. Following these transactions, the indirectly held position reported for Kersten (through ForDyne and related Forbion entities) decreased from 3,921,542 shares to 3,848,256 shares of Dyne common stock, with the filing emphasizing that the shares are held by ForDyne, that various Forbion management entities may be deemed to share voting and dispositive power, and that Kersten disclaims beneficial ownership beyond his pecuniary interest.

Filing Facts

CIK

1818794

Ticker

DYN

Form

4

Source Type

sec

Accession

0001193125-26-281119

Alert Tier

7