Altair Engineering Inc. (ALTR)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	7,478,856	$816,017,977	0.01%
2.	Vanguard Group Inc	6,894,230	$752,229,436	0.01%
3.	State Street Corp	2,122,319	$231,566,226	0%
4.	Geode Capital Management, Llc	1,394,124	$152,148,141	0.01%
5.	Conestoga Capital Advisors, Llc	1,112,548	$121,390,112	1.6%