Insider Buying and Selling - DYN

Transaction	Filed	Name	Type	Shares @ Price	Value	Balance change		Ownership
06/08/2026	06/09/2026	Posner Brian S Director	Buy	2,000 @ $16.94	$33,880.00	24,500	(8.89%)	Direct
06/03/2026	06/05/2026	Posner Brian S Director	Buy	2,500 @ $17.48	$43,700.00	22,500	(12.50%)	Direct
05/26/2026	05/28/2026	Posner Brian S Director	Buy	2,000 @ $18.21	$36,420.00	20,000	(11.11%)	Direct
05/20/2026	05/22/2026	Posner Brian S Director	Buy	2,500 @ $17.12	$42,800.00	18,000	(16.13%)	Direct
05/13/2026 10b5-1	05/14/2026	Cox John CEO & President CEO Director	Sell	-3,311 @ $18.36	($60,789.96)	370,834	(-0.88%)	Direct
05/13/2026 10b5-1	05/14/2026	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-228 @ $18.36	($4,186.08)	154,353	(-0.15%)	Direct
05/13/2026 10b5-1	05/14/2026	Kerr Douglas Chief Medical Officer Officer	Sell	-1,564 @ $18.36	($28,715.04)	170,042	(-0.91%)	Direct
05/13/2026 10b5-1	05/14/2026	Lucera Erick Chief Financial Officer CFO	Sell	-1,448 @ $18.36	($26,585.28)	123,925	(-1.15%)	Direct
04/01/2026 10b5-1	04/03/2026	Lucera Erick Chief Financial Officer CFO	Sell	-5,727 @ $18.64	($106,751.28)	125,373	(-4.37%)	Direct
03/30/2026	04/01/2026	Posner Brian S Director	Buy	2,000 @ $17.08	$34,160.00	15,500	(14.81%)	Direct
03/11/2026	03/13/2026	Posner Brian S Director	Buy	2,000 @ $19.35	$38,700.00	13,500	(17.39%)	Direct
03/06/2026	03/10/2026	Posner Brian S Director	Buy	3,000 @ $15.06	$45,180.00	11,500	(35.29%)	Direct
03/05/2026 10b5-1	03/06/2026	Cox John CEO & President CEO Director	Sell	-2,732 @ $14.90	($40,706.80)	374,145	(-0.72%)	Direct
03/05/2026 10b5-1	03/06/2026	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-148 @ $14.90	($2,205.20)	154,581	(-0.10%)	Direct
03/05/2026 10b5-1	03/06/2026	Kerr Douglas Chief Medical Officer Officer	Sell	-904 @ $14.90	($13,469.60)	171,606	(-0.52%)	Direct
12/05/2025 10b5-1	12/05/2025	Cox John CEO & President CEO Director	Sell	-2,662 @ $20.72	($55,156.64)	196,877	(-1.33%)	Direct
12/05/2025 10b5-1	12/05/2025	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-144 @ $20.72	($2,983.68)	94,729	(-0.15%)	Direct
12/05/2025 10b5-1	12/05/2025	Kerr Douglas Chief Medical Officer Officer	Sell	-880 @ $20.72	($18,233.60)	87,510	(-1.00%)	Direct
09/05/2025 10b5-1	09/09/2025	Cox John CEO & President CEO Director	Sell	-2,640 @ $13.41	($35,402.40)	199,539	(-1.31%)	Direct
09/05/2025 10b5-1	09/08/2025	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-144 @ $13.41	($1,931.04)	94,873	(-0.15%)	Direct
09/05/2025 10b5-1	09/08/2025	Kerr Douglas Chief Medical Officer Officer	Sell	-873 @ $13.41	($11,706.93)	88,390	(-0.98%)	Direct
09/04/2025 10b5-1	09/08/2025	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-894 @ $13.27	($11,863.38)	95,017	(-0.93%)	Direct
09/04/2025 10b5-1	09/08/2025	Kerr Douglas Chief Medical Officer Officer	Sell	-3,552 @ $13.27	($47,135.04)	89,263	(-3.83%)	Direct
07/14/2025	07/15/2025	Cox John CEO & President CEO Director	Buy	100,000 @ $9.11	$911,000.00	242,179	(70.33%)	Direct

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Dyne Therapeutics, Inc. - DYN

Latest data: 6/9/2026 10:01:39 PM

Buy Breakdown

Total $1,185,840

Sell Breakdown

Total $467,822

Monthly Totals