Insider Buying and Selling - DYN

Transaction	Filed	Name	Type	Shares @ Price	Value	Balance change		Ownership
09/08/2026 10b5-1	09/08/2026	Cox John CEO & President CEO Director	Sell	-5,658 @ $18.88	($106,823.04)	357,507	(-1.56%)	Direct
09/08/2026 10b5-1	09/08/2026	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-185 @ $18.88	($3,492.80)	152,897	(-0.12%)	Direct
09/08/2026 10b5-1	09/08/2026	Kerr Douglas Chief Medical Officer Officer	Sell	-1,290 @ $18.88	($24,355.20)	162,564	(-0.79%)	Direct
09/04/2026 10b5-1	09/08/2026	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-900 @ $24.35	($21,915.00)	153,082	(-0.58%)	Direct
09/04/2026 10b5-1	09/08/2026	Kerr Douglas Chief Medical Officer Officer	Sell	-3,745 @ $24.35	($91,190.75)	163,854	(-2.23%)	Direct
08/13/2026 10b5-1	08/17/2026	Cox John CEO & President CEO Director	Sell	-4,986 @ $26.28	($131,032.08)	363,165	(-1.35%)	Direct
08/13/2026 10b5-1	08/17/2026	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-226 @ $26.28	($5,939.28)	153,982	(-0.15%)	Direct
08/13/2026 10b5-1	08/17/2026	Kerr Douglas Chief Medical Officer Officer	Sell	-1,556 @ $26.28	($40,891.68)	167,599	(-0.92%)	Direct
08/13/2026 10b5-1	08/17/2026	Lucera Erick Chief Financial Officer CFO	Sell	-1,797 @ $26.28	($47,225.16)	119,766	(-1.48%)	Direct
06/25/2026	06/26/2026	Lucera Erick Chief Financial Officer CFO	Sell	-2,362 @ $20.37	($48,113.94)	121,563	(-1.91%)	Direct
06/16/2026 10b5-1	06/17/2026	Cox John CEO & President CEO Director	Sell	-2,683 @ $18.33	($49,179.39)	368,151	(-0.72%)	Direct
06/16/2026 10b5-1	06/17/2026	Friedl-Naderer Johanna Chief Commercial Officer Officer	Sell	-145 @ $18.33	($2,657.85)	154,208	(-0.09%)	Direct
06/16/2026 10b5-1	06/17/2026	Kerr Douglas Chief Medical Officer Officer	Sell	-887 @ $18.33	($16,258.71)	169,155	(-0.52%)	Direct
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

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Dyne Therapeutics, Inc. - DYN

Latest data: 9/9/2026 10:01:45 PM

Buy Breakdown

Total $274,840

Sell Breakdown

Total $948,858

Monthly Totals