X0306 4 2021-01-11 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 2021-01-11 4 M false 7900.00 18.24 A 16980.00 D Common Stock 2021-01-11 4 M false 7900.00 14.80 A 24880.00 D Common Stock 2021-01-11 4 M false 29162.00 8.16 A 54042.00 D Common Stock 2021-01-11 4 S false 7200.00 47.1656 D 46842.00 D Common Stock 2021-01-11 4 S false 22830.00 47.8651 D 24012.00 D Common Stock 2021-01-11 4 S false 2333.00 49.1564 D 21679.00 D Common Stock 2021-01-11 4 S false 4400.00 50.3767 D 17279.00 D Common Stock 2021-01-11 4 S false 8199.00 51.0821 D 9080.00 D Stock Option (Right to Buy) 18.24 2021-01-11 4 M false 7900.00 0.00 D 2019-12-31 2029-01-02 Common Stock 7900.00 0.00 D Stock Option (Right to Buy) 14.80 2021-01-11 4 M false 7900.00 0.00 D 2018-12-31 2028-08-07 Common Stock 7900.00 0.00 D Stock Option (right to buy) 8.16 2021-01-11 4 M false 29162.00 0.00 D 2027-03-31 Common Stock 29162.00 1951.00 D The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 9, 2020. This transaction was executed in multiple trades at prices ranging from $46.47 to $47.46. 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 transaction was executed in multiple trades at prices ranging from $47.47 to $48.43. 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 transaction was executed in multiple trades at prices ranging from $48.74 to $49.70. 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 transaction was executed in multiple trades at prices ranging from $49.79 to $50.78. 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 transaction was executed in multiple trades at prices ranging from $50.79 to $51.64. 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 2,270 restricted stock units. The option vests as to 25% of the shares on March 13, 2018 and vests as to an additional 2.083% of the shares per month thereafter until February 28, 2021. /s/ Brian Keane, as Attorney-in-Fact 2021-01-13