X0206 3 2017-12-06 0 0001503274 Quanterix Corp QTRX 0001392297 DRISCOLL JOSEPH C/O QUANTERIX CORPORATION, 113 HARTWELL AVENUE LEXINGTON MA 02421 0 1 0 0 Chief Financial Officer Stock Option (right to buy) 8.68 2027-06-02 Common Stock 301722 D Stock Option (right to buy) 9.42 2027-08-31 Common Stock 10976 D The option vests 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. In the event of successful completion of an initial public offering of the Issuer's common stock on or prior to April 24, 2018, the first 33% of the shares shall immediately vest. Reflects the 1-for-3.214 reverse stock split of the Issuer's common stock effected on December 4, 2017 in connection with the Issuer's initial public offering, pursuant to which (i) the number of shares of common stock underlying the option was divided by 3.214 and (ii) the exercise price of the option was multiplied by 3.214. Exhibit 24.1 - Power of Attorney /s/ Brian Keane, Attorney-in-fact 2017-12-06