QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

D.A. DAVIDSON & CO.'s Holding History (CIK: 0001080107)

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

Q1 2022

Shares 7,200 Value ($000) $210 Avg Close $30.56 Range $22.70 - $43.32

Q4 2021

Shares 35,436 Value ($000) $1,502 Avg Close $46.70 Range $35.02 - $60.92

Q3 2021

Shares 36,505 Value ($000) $1,818 Avg Close $51.55 Range $44.20 - $60.95

Q2 2021

Shares 32,553 Value ($000) $1,910 Avg Close $58.04 Range $41.76 - $69.22

Q1 2021

Shares 24,790 Value ($000) $1,449 Avg Close $67.60 Range $42.92 - $92.57

Q4 2020

Shares 24,414 Value ($000) $1,135 Avg Close $43.65 Range $33.55 - $52.75

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2022	7,200	$210	$30.56	$22.70 - $43.32
Q4 2021	35,436	$1,502	$46.70	$35.02 - $60.92
Q3 2021	36,505	$1,818	$51.55	$44.20 - $60.95
Q2 2021	32,553	$1,910	$58.04	$41.76 - $69.22
Q1 2021	24,790	$1,449	$67.60	$42.92 - $92.57
Q4 2020	24,414	$1,135	$43.65	$33.55 - $52.75