QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

NEXT CENTURY GROWTH INVESTORS LLC's Holding History (CIK: 0001134007)

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

Q4 2020

Shares 101,537 Value ($000) $4,721 Avg Close $43.65 Range $33.55 - $52.75

Q3 2020

Shares 137,177 Value ($000) $4,628 Avg Close $32.20 Range $26.01 - $37.77

Q2 2020

Shares 147,917 Value ($000) $4,051 Avg Close $25.27 Range $17.12 - $28.99

Q1 2020

Shares 150,073 Value ($000) $2,756 Avg Close $22.82 Range $10.89 - $29.00

Q4 2019

Shares 154,659 Value ($000) $3,654 Avg Close $22.82 Range $19.08 - $26.07

Q3 2019

Shares 112,413 Value ($000) $2,468 Avg Close $27.89 Range $21.17 - $35.69

Q2 2019

Shares 116,197 Value ($000) $3,926 Avg Close $25.87 Range $19.54 - $36.15

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	101,537	$4,721	$43.65	$33.55 - $52.75
Q3 2020	137,177	$4,628	$32.20	$26.01 - $37.77
Q2 2020	147,917	$4,051	$25.27	$17.12 - $28.99
Q1 2020	150,073	$2,756	$22.82	$10.89 - $29.00
Q4 2019	154,659	$3,654	$22.82	$19.08 - $26.07
Q3 2019	112,413	$2,468	$27.89	$21.17 - $35.69
Q2 2019	116,197	$3,926	$25.87	$19.54 - $36.15