QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

IRONWOOD INVESTMENT MANAGEMENT LLC's Holding History (CIK: 0001127761)

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

Q4 2025

Shares 172,330 Value ($000) $1,096 Avg Close $6.21 Range $4.50 - $7.88

Q3 2025

Shares 194,074 Value ($000) $1,054 Avg Close $5.32 Range $4.15 - $7.09

Q2 2025

Shares 21,297 Value ($000) $142 Avg Close $5.57 Range $4.05 - $7.03

Q2 2023

Shares 11,301 Value ($000) $255 Avg Close $17.82 Range $10.64 - $24.14

Q1 2023

Shares 11,301 Value ($000) $127 Avg Close $12.78 Range $10.02 - $15.63

Q4 2022

Shares 11,301 Value ($000) $157 Avg Close $11.51 Range $8.19 - $14.55

Q3 2022

Shares 11,353 Value ($000) $125 Avg Close $12.71 Range $6.31 - $19.46

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	172,330	$1,096	$6.21	$4.50 - $7.88
Q3 2025	194,074	$1,054	$5.32	$4.15 - $7.09
Q2 2025	21,297	$142	$5.57	$4.05 - $7.03
Q2 2023	11,301	$255	$17.82	$10.64 - $24.14
Q1 2023	11,301	$127	$12.78	$10.02 - $15.63
Q4 2022	11,301	$157	$11.51	$8.19 - $14.55
Q3 2022	11,353	$125	$12.71	$6.31 - $19.46