| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Toloue Masoud | President & CEO, Director | C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA | /s/ Brian Keane, as Attorney-in-Fact | 04 Aug 2025 | 0001867276 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | QTRX | Common Stock | Tax liability | $1,509 | -254 | -0.05% | $5.94 | 515,930 | 31 Jul 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Shares withheld by Quanterix Corporation solely to cover tax obligations upon the vesting of 761 RSUs. |
| F2 | Includes 232,535 restricted stock units. |