X0306 4 2022-07-13 false 0001503274 Quanterix Corp QTRX 0001284533 DOYLE MICHAEL A C/O QUANTERIX CORPORATION 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 false true false false CFO and Treasurer Common Stock 2022-07-13 4 S false 434.00 18.1554 D 18651.00 D Common Stock 2022-08-01 4 S false 37.00 15.6147 D 18614.00 D The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 1,382 RSUs. Includes 17,703 restricted stock units. The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 115 RSUs. This transaction was executed in multiple trades at prices ranging from $15.58 to $15.6412. The price reported reflects the weighted average sale price. The reporting person undertakes to provide upon request to the SEC staff, the issuer or any security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. Includes 17,588 restricted stock units. /s/ Brian Keane, as Attorney-in-Fact 2022-08-03