QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

Select Equity Group, L.P.'s Holding History (CIK: 0001592643)

Note: Option positions (PUT/CALL) are excluded.

Q4 2021

Shares 322,720 Value ($000) $13,683 Avg Close $46.70 Range $35.02 - $60.92

Q3 2021

Shares 316,902 Value ($000) $15,778,551 Avg Close $51.55 Range $44.20 - $60.95

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2021	322,720	$13,683	$46.70	$35.02 - $60.92
Q3 2021	316,902	$15,778,551	$51.55	$44.20 - $60.95