X0306 4 2022-02-09 false 0001503274 Quanterix Corp QTRX 0001731785 Mattoon Dawn C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 false true false false Sr. VP, Diagnostics Common Stock 2022-02-09 4 S false 318.00 34.9686 D 37404.00 D The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 919 RSUs. This transaction was executed in multiple trades at prices ranging from $34.9435 to $34.985. 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 10,785 restricted stock units. /s/ Brian Keane, as Attorney-in-Fact 2022-02-09