X0306 4 2020-10-01 false 0001503274 Quanterix Corp QTRX 0001310268 Madaus Martin D C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 true false false false Common Stock 2020-10-01 4 A false 520.00 34.70 A 11716.00 D Common Stock 164966.00 I See Footnote Consists of stock granted in lieu of cash fees for service on the Company's Board of Directors and committees thereof for the third quarter of 2020, pursuant to an election made in December 2019. Closing price of the Company's common stock on the Nasdaq Global Market on October 1, 2020. Includes 2,270 Restricted Stock Units. Held by a trust for which the Reporting Person is a trust advisor who shares voting and investment control. /s/ Brian Keane, Attorney-in-Fact 2020-10-05