Integral Ad Science Holding Corp. (IAS)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Atlas Venture Advisors, Inc.	22,722,770	$231,090,571	52.79%
2.	Vanguard Group Inc	9,043,380	$91,971,174	0%
3.	Blackrock, Inc.	6,757,261	$68,721,343	0%
4.	Dimensional Fund Advisors Lp	5,949,164	$60,502,884	0.01%
5.	Vivaldi Asset Management, Llc	2,088,796	$21,243,055	1.37%