QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q2 2021

Shares 237,711 Value ($000) $13,944 Avg Close $58.04 Range $41.76 - $69.22

Q1 2021

Shares 318,855 Value ($000) $18,643 Avg Close $67.60 Range $42.92 - $92.57

Q4 2020

Shares 433,241 Value ($000) $20,146 Avg Close $43.65 Range $33.55 - $52.75

Q3 2020

Shares 444,044 Value ($000) $14,982 Avg Close $32.20 Range $26.01 - $37.77

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2021	237,711	$13,944	$58.04	$41.76 - $69.22
Q1 2021	318,855	$18,643	$67.60	$42.92 - $92.57
Q4 2020	433,241	$20,146	$43.65	$33.55 - $52.75
Q3 2020	444,044	$14,982	$32.20	$26.01 - $37.77