QUANTERIX CORP

Ticker: QTRX CUSIP: 74766Q101 Class: Common Stock

LORD, ABBETT & CO. LLC's Holding History (CIK: 0000728100)

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

Q1 2024

Shares 1,757,153 Value ($000) $41 Avg Close $24.77 Range $21.53 - $29.70

Q4 2023

Shares 1,430,277 Value ($000) $39 Avg Close $23.54 Range $19.35 - $28.78

Q3 2023

Shares 1,022,253 Value ($000) $28 Avg Close $24.75 Range $20.57 - $28.77

Q1 2022

Shares 137,607 Value ($000) $4,017 Avg Close $30.56 Range $22.70 - $43.32

Q4 2021

Shares 296,492 Value ($000) $12,571 Avg Close $46.70 Range $35.02 - $60.92

Q3 2021

Shares 836,838 Value ($000) $41,666 Avg Close $51.55 Range $44.20 - $60.95

Q2 2021

Shares 852,474 Value ($000) $50,006 Avg Close $58.04 Range $41.76 - $69.22

Q1 2021

Shares 1,300,057 Value ($000) $76,014 Avg Close $67.60 Range $42.92 - $92.57

Q4 2020

Shares 347,916 Value ($000) $16,178 Avg Close $43.65 Range $33.55 - $52.75

Q3 2020

Shares 289,275 Value ($000) $9,760 Avg Close $32.20 Range $26.01 - $37.77

Q2 2020

Shares 232,339 Value ($000) $6,364 Avg Close $25.27 Range $17.12 - $28.99

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2024	1,757,153	$41	$24.77	$21.53 - $29.70
Q4 2023	1,430,277	$39	$23.54	$19.35 - $28.78
Q3 2023	1,022,253	$28	$24.75	$20.57 - $28.77
Q1 2022	137,607	$4,017	$30.56	$22.70 - $43.32
Q4 2021	296,492	$12,571	$46.70	$35.02 - $60.92
Q3 2021	836,838	$41,666	$51.55	$44.20 - $60.95
Q2 2021	852,474	$50,006	$58.04	$41.76 - $69.22
Q1 2021	1,300,057	$76,014	$67.60	$42.92 - $92.57
Q4 2020	347,916	$16,178	$43.65	$33.55 - $52.75
Q3 2020	289,275	$9,760	$32.20	$26.01 - $37.77
Q2 2020	232,339	$6,364	$25.27	$17.12 - $28.99