Tracy Zimmermann

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
29 Jan 24	GBIO Generation Bio	Common Stock	Payment of exercise	Dispose F	No	No	1.9	1,476	2.80 k	49,164
29 Jan 24	GBIO Generation Bio	Common Stock	Option exercise	Acquire M	No	No	0	5,021	0.00	50,640
29 Jan 24	GBIO Generation Bio	RSU Common Stock	Option exercise	Dispose M	No	No	0	5,021	0.00	0
15 Jan 24	GBIO Generation Bio	Common Stock	Payment of exercise	Dispose F	No	No	1.91	2,320	4.43 k	45,619
15 Jan 24	GBIO Generation Bio	Common Stock	Option exercise	Acquire M	No	No	0	6,694	0.00	47,939
15 Jan 24	GBIO Generation Bio	Common Stock	Payment of exercise	Dispose F	No	No	1.91	2,577	4.92 k	41,245
15 Jan 24	GBIO Generation Bio	Common Stock	Option exercise	Acquire M	No	No	0	7,437	0.00	43,822
15 Jan 24	GBIO Generation Bio	RSU Common Stock	Option exercise	Dispose M	No	No	0	6,694	0.00	20,081
15 Jan 24	GBIO Generation Bio	RSU Common Stock	Option exercise	Dispose M	No	No	0	7,437	0.00	0
15 Oct 23	GBIO Generation Bio	Common Stock	Payment of exercise	Dispose F	No	No	3.24	2,183	7.07 k	36,385

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