Quanterix Corp (QTRX)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	3,070,115	$19,986,450	0%
2.	Vanguard Group Inc	2,525,679	$16,442,171	0%
3.	William Blair Investment Management, Llc	1,106,063	$7,200,470	0.02%
4.	Baillie Gifford & Co	600,812	$3,911,286	0%
5.	Envestnet Asset Management Inc	500,398	$3,257,591	0%