QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

Monashee Investment Management LLC's Holding History (CIK: 0001627608)

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

Q2 2021

Shares 25,000 Value ($000) $1,467 Avg Close $58.04 Range $41.76 - $69.22

Q1 2021

Shares 100,000 Value ($000) $5,847 Avg Close $67.60 Range $42.92 - $92.57

Q4 2020

Shares 400,000 Value ($000) $18,600 Avg Close $43.65 Range $33.55 - $52.75

Q3 2020

Shares 195,000 Value ($000) $6,579 Avg Close $32.20 Range $26.01 - $37.77

Q4 2017

Shares 177,500 Value ($000) $3,811 Avg Close $19.52 Range $15.56 - $23.70

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2021	25,000	$1,467	$58.04	$41.76 - $69.22
Q1 2021	100,000	$5,847	$67.60	$42.92 - $92.57
Q4 2020	400,000	$18,600	$43.65	$33.55 - $52.75
Q3 2020	195,000	$6,579	$32.20	$26.01 - $37.77
Q4 2017	177,500	$3,811	$19.52	$15.56 - $23.70