X0306 4 2020-04-13 false 0001503274 Quanterix Corp QTRX 0001724565 Roskey Mark T. C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 false true false false SVP, Commercial & Accelerator Common Stock 2020-04-13 4 M false 5000.00 2.96 A 26836.00 D Common Stock 2020-04-13 4 S false 4300.00 20.8996 D 22536.00 D Common Stock 2020-04-13 4 S false 700.00 21.6357 D 21836.00 D Stock Option (Right to Buy) 2.96 2020-04-13 4 M false 5000.00 0.00 D 2024-09-23 Common Stock 5000.00 104455.00 D Includes 17,349 restricted stock units. The sale of shares reported on this Form 4 was made pursuant to a Rule 10b5-1 trading plan adopted on December 13, 2019. This transaction was executed in multiple trades at prices ranging from $20.47 to $21.40. 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 transaction was executed in multiple trades at prices ranging from $21.49 to $21.78. 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. Option is fully vested. /s/ Brian Keane, Attorney-in-fact 2020-04-14