X0306 4 2019-10-01 false 0001503274 Quanterix Corp QTRX 0001433554 Hlavinka Sarah E. C/O QUANTERIX CORPORATION 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 true false false false Common Stock 2019-10-01 4 A false 320.00 21.41 A 4860.00 D 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 2019, pursuant to an election made in July 2019. Closing price of the Company's common stock on the Nasdaq Global Market on October 1, 2019. Includes 4,540 restricted stock units. /s/ Brian Keane, as Attorney-in-Fact 2019-10-03