Exact Sciences Corp (EXAS)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Vanguard Group Inc	17,637,674	$763,534,908	0.01%
2.	Blackrock, Inc.	11,920,721	$516,047,997	0.01%
3.	Mackenzie Financial Corp	3,281,639	$142,062,152	0.2%
4.	William Blair Investment Management, Llc	2,249,038	$97,360,855	0.27%
5.	Schwab Charles Investment Management Inc	1,391,599	$60,242,340	0.01%