QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

Clearstead Advisors, LLC's Holding History (CIK: 0000842775)

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

Q4 2025

Shares 5 Value ($000) $0 Avg Close $6.21 Range $4.50 - $7.88

Q3 2025

Shares 132 Value ($000) $1 Avg Close $5.32 Range $4.15 - $7.09

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	5	$0	$6.21	$4.50 - $7.88
Q3 2025	132	$1	$5.32	$4.15 - $7.09