QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

Clearbridge Investments, LLC's Holding History (CIK: 0001348883)

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

Q3 2022

Shares 368,542 Value ($000) $4,061 Avg Close $12.71 Range $6.31 - $19.46

Q2 2022

Shares 486,160 Value ($000) $7,871 Avg Close $20.56 Range $14.58 - $31.33

Q1 2022

Shares 484,685 Value ($000) $14,148 Avg Close $30.56 Range $22.70 - $43.32

Q4 2021

Shares 481,263 Value ($000) $20,406 Avg Close $46.70 Range $35.02 - $60.92

Q3 2021

Shares 482,598 Value ($000) $24,029 Avg Close $51.55 Range $44.20 - $60.95

Q2 2021

Shares 484,051 Value ($000) $28,394 Avg Close $58.04 Range $41.76 - $69.22

Q1 2021

Shares 283,212 Value ($000) $16,559 Avg Close $67.60 Range $42.92 - $92.57

Q4 2020

Shares 284,836 Value ($000) $13,245 Avg Close $43.65 Range $33.55 - $52.75

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2022	368,542	$4,061	$12.71	$6.31 - $19.46
Q2 2022	486,160	$7,871	$20.56	$14.58 - $31.33
Q1 2022	484,685	$14,148	$30.56	$22.70 - $43.32
Q4 2021	481,263	$20,406	$46.70	$35.02 - $60.92
Q3 2021	482,598	$24,029	$51.55	$44.20 - $60.95
Q2 2021	484,051	$28,394	$58.04	$41.76 - $69.22
Q1 2021	283,212	$16,559	$67.60	$42.92 - $92.57
Q4 2020	284,836	$13,245	$43.65	$33.55 - $52.75