X0306 4 2020-01-02 false 0001503274 Quanterix Corp QTRX 0001216068 DEKKERS MARIJN E C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 true false false false Common Stock 2020-01-02 4 A false 2270.00 0.00 A 6810.00 D Common Stock 27619.00 I Held by Novalis LifeSciences Investments I, L.P. Stock Option (Right to Buy) 23.12 2020-01-02 4 A false 7900.00 0.00 A 2020-12-31 2030-01-02 Common Stock 7900.00 7900.00 D Represents restricted stock units that vest as to 100% of the shares on December 31, 2020 granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock. Includes 2,270 restricted stock units. Reflects the portion of the 117,378 shares of the Issuer's common stock held by Novalis LifeSciences Investments I, L.P. (the "Fund") in which the Reporting Person has a pecuniary interest. The Fund owns an aggregate of 117,378 shares of common stock of the Issuer. The Reporting Person has sole voting and investment control over all of the shares owned by the Fund and has a pecuniary interest in 27,619 of the shares. Represents non-qualified stock option to purchase 7,900 shares of common stock granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. /s/ Brian Keane, as Attorney-in-Fact 2020-01-06