Mersana Therapeutics Inc. (MRSN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Vr Adviser, Llc	11,328,000	$26,280,960	1.8%
2.	Bain Capital Life Sciences Investors, Llc	8,663,673	$20,099,721	1.92%
3.	Blackrock Inc.	7,844,282	$18,198,734	0%
4.	Vanguard Group Inc	6,237,588	$14,471,204	0%
5.	Nextech Invest Ag	5,978,327	$13,869,719	2.58%