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	$326,980,660	57.48%
2.	Vanguard Group Inc	8,106,247	$116,648,894	0%
3.	Blackrock Inc.	4,440,790	$63,902,969	0%
4.	Clearbridge Investments, Llc	3,494,608	$50,287,403	0.04%
5.	Goldman Sachs Group Inc	2,740,011	$39,428,758	0%