Douglas Kerr Dyne Therapeutics, Inc. (DYN) insider trading activity

Douglas Kerr is Chief Medical Officer of Dyne Therapeutics, Inc.. Currently has a direct ownership of 87,510 shares of DYN, which is worth approximately $1.65 Million. The most recent transaction as insider was on Dec 05, 2025, when has been sold 880 shares (Common Stock) at a price of $20.72 per share, resulting in proceeds of $18,233. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 87.5K

1.0% 3M change

8.37% 12M change

Total Value Held $1.65 Million

Douglas Kerr Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Dec 05 2025	SELL Open market or private sale	$18,233 $20.72 p/Share	880 Reduced 1.0%	87,510 Common Stock
Sep 05 2025	SELL Open market or private sale	$11,706 $13.41 p/Share	873 Reduced 0.98%	88,390 Common Stock
Sep 04 2025	SELL Open market or private sale	$47,135 $13.27 p/Share	3,552 Reduced 3.83%	89,263 Common Stock
Jun 05 2025	SELL Open market or private sale	$17,915 $13.35 p/Share	1,342 Reduced 1.43%	92,815 Common Stock
Mar 05 2025	SELL Open market or private sale	$15,887 $11.83 p/Share	1,343 Reduced 1.41%	94,157 Common Stock
Dec 04 2024	BUY Grant, award, or other acquisition	-	48,000 Added 33.45%	95,500 Common Stock
Sep 03 2024	BUY Grant, award, or other acquisition	-	47,500 Added 50.0%	47,500 Common Stock

Also insider at

GBIO

Generation Bio Co. Healthcare

CHIEF MEDICAL OFFICER

Douglas Kerr

Chief Medical Officer

Cambridge, MA

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