Mersana Therapeutics Inc. (MRSN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Nextech Invest, Ltd.	12,067,246	$4,153,546	0.97%
2.	Bain Capital Life Sciences Investors, Llc	8,663,673	$2,982,036	0.44%
3.	Vanguard Group Inc	8,377,767	$2,881,951	0%
4.	Blackrock, Inc.	8,326,182	$2,865,872	0%
5.	Vr Adviser, Llc	3,574,325	$1,230,283	0.1%