X0306 4 2018-11-08 false 0001503274 Quanterix Corp QTRX 0001392297 DRISCOLL JOSEPH C/O QUANTERIX CORPORATION, 113 HARTWELL AVENUE LEXINGTON MA 02421 false true false false Chief Financial Officer Common Stock 2018-11-08 4 M false 2337.00 8.68 A 6725.00 D Common Stock 2018-11-08 4 S false 2337.00 17.36 D 4388.00 D Stock Option (right to buy) 8.68 2018-11-08 4 M false 2337.00 0.00 D 2027-06-02 Common Stock 2337.00 299385.00 D Includes 4,388 shares of common stock issuable upon vesting of restricted stock units that vest as to 25% of the shares on May 10, 2019 and as to an additional 2.083% of the shares per month for 36 months thereafter. This transaction was executed in multiple trades at prices ranging from $17.30 to $17.40. 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. This option to purchase 301,722 shares of common stock vested as to 25% of the shares on April 24, 2018 and vests as to an additional 2.083% of the shares per month thereafter until March 31, 2021. /s/ Brian Keane, as Attorney-in-Fact 2018-11-13