QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

Susquehanna Portfolio Strategies, LLC's Holding History (CIK: 0001996449)

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

Q4 2025

Shares 55,150 Value ($000) $351 Avg Close $6.21 Range $4.50 - $7.88

Q3 2025

Shares 97,669 Value ($000) $530 Avg Close $5.32 Range $4.15 - $7.09

Q2 2025

Shares 158,532 Value ($000) $1,054 Avg Close $5.57 Range $4.05 - $7.03

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	55,150	$351	$6.21	$4.50 - $7.88
Q3 2025	97,669	$530	$5.32	$4.15 - $7.09
Q2 2025	158,532	$1,054	$5.57	$4.05 - $7.03