Susanna Gatti High

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
18 Sep 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	34.41	4,636	159.52 k	131,636
18 Sep 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	34.41	4,340	149.34 k	136,272
11 Sep 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	31.89	2,722	86.80 k	140,612
11 Sep 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	31.89	2,548	81.26 k	143,334
19 Aug 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	46	328	15.09 k	145,882
19 Aug 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	45.01	2,582	116.22 k	146,210
24 Jun 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	35.33	10,163	359.06 k	148,792
24 Jun 24	DYN Dyne Therapeutics	Common Stock	Option exercise	Acquire M	No	No	5.54	10,163	56.30 k	158,955
24 Jun 24	DYN Dyne Therapeutics	Stock option Common Stock	Option exercise	Dispose M	No	No	5.54	10,163	56.30 k	60,536
24 Jun 24	DYN Dyne Therapeutics	Common Stock	Sell	Dispose S	No	Yes	35.33	10,213	360.83 k	148,792

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.