QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

COMMONWEALTH EQUITY SERVICES, LLC's Holding History (CIK: 0000312272)

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

Q4 2025

Shares 11,238 Value ($000) $71 Avg Close $6.21 Range $4.50 - $7.88

Q3 2025

Shares 17,465 Value ($000) $0 Avg Close $5.32 Range $4.15 - $7.09

Q2 2025

Shares 17,915 Value ($000) $0 Avg Close $5.57 Range $4.05 - $7.03

Q1 2025

Shares 18,015 Value ($000) $0 Avg Close $8.34 Range $6.16 - $12.41

Q1 2021

Shares 4,750 Value ($000) $277 Avg Close $67.60 Range $42.92 - $92.57

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	11,238	$71	$6.21	$4.50 - $7.88
Q3 2025	17,465	$0	$5.32	$4.15 - $7.09
Q2 2025	17,915	$0	$5.57	$4.05 - $7.03
Q1 2025	18,015	$0	$8.34	$6.16 - $12.41
Q1 2021	4,750	$277	$67.60	$42.92 - $92.57