2Seventy Bio Inc. (TSVT)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Morgan Stanley	4,842,810	$20,678,800	0%
2.	Goldman Sachs Group Inc	4,508,800	$19,252,576	0%
3.	Vanguard Group Inc	3,985,770	$17,019,237	0%
4.	Blackrock Inc.	3,911,724	$16,703,061	0%
5.	Bain Capital Life Sciences Investors, Llc	1,331,801	$5,686,790	0.54%