Generation Bio Co. (GBIO)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Atlas Venture Life Science Advisors, Llc	8,279,484	$8,776,253	1.07%
2.	Fmr Llc	4,626,045	$4,903,608	0%
3.	Blackrock, Inc.	3,459,065	$3,666,611	0%
4.	Bank Of America Corp	2,997,739	$3,177,603	0%
5.	Vanguard Group Inc	2,641,996	$2,800,515	0%