X0609 4 2026-09-15 false 0001503274 Quanterix Corp QTRX 0002148276 Gute James Edward Jr. false C/O QUANTERIX CORPORATION 900 MIDDLESEX TURNPIKE BILLERICA MA 01821 false true false false Chief Commercial Officer false Restricted Stock Unit 0.00 2026-09-15 4 A false 260315.00 0.00 A Common Stock 260315.00 260315.00 D On September 15, 2026, the reporting person was granted 260,315 restricted stock units. The RSUs vest in four equal annual installments on the first four anniversaries of the grant date, subject to the reporting person's continued employment with the issuer or one of its subsidiaries through the vesting dates. /s/ Michael Lanieri, Attorney-in-Fact 2026-09-17