QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

BlackRock, Inc.'s Holding History (CIK: 0002012383)

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

Q4 2025

Shares 3,375,910 Value ($000) $21,471 Avg Close $6.21 Range $4.50 - $7.88

Q3 2025

Shares 3,112,980 Value ($000) $16,903 Avg Close $5.32 Range $4.15 - $7.09

Q2 2025

Shares 2,924,699 Value ($000) $19,449 Avg Close $5.57 Range $4.05 - $7.03

Q1 2025

Shares 3,070,115 Value ($000) $19,986 Avg Close $8.34 Range $6.16 - $12.41

Q4 2024

Shares 3,164,221 Value ($000) $33,636 Avg Close $12.16 Range $9.87 - $15.67

Q3 2024

Shares 3,210,916 Value ($000) $41,613 Avg Close $13.36 Range $10.50 - $16.74

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,375,910	$21,471	$6.21	$4.50 - $7.88
Q3 2025	3,112,980	$16,903	$5.32	$4.15 - $7.09
Q2 2025	2,924,699	$19,449	$5.57	$4.05 - $7.03
Q1 2025	3,070,115	$19,986	$8.34	$6.16 - $12.41
Q4 2024	3,164,221	$33,636	$12.16	$9.87 - $15.67
Q3 2024	3,210,916	$41,613	$13.36	$10.50 - $16.74