SEC Form 4 · accession 0001908223-26-000010
Quanterix Corp · QTRX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Vandana Sriram
Officer — Chief Financial Officer
Period of report
Jun 15, 2026
Accepted (ET)
Jun 23, 2026 · 5:06 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001503274
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Jun 15, 2026 | M | 263 | — | A | 30,261 | D | |
| Common Stock | Jun 15, 2026 | F | 79 | $3.10 | D | 30,182 | D | |
| Common StockF1 | Jun 15, 2026 | M | 514 | — | A | 30,696 | D | |
| Common Stock | Jun 15, 2026 | F | 154 | $3.10 | D | 30,542 | D | |
| Common StockF1 | Jun 15, 2026 | M | 1,056 | — | A | 31,598 | D | |
| Common Stock | Jun 15, 2026 | F | 315 | $3.10 | D | 31,283 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitF2 | $0.00 | Jun 15, 2026 | M | 263 | D | — | — | Common Stock | 263 | 3,682 | D |
| Restricted Stock UnitF3 | $0.00 | Jun 15, 2026 | M | 514 | D | — | — | Common Stock | 514 | 10,283 | D |
| Restricted Stock UnitF4 | $0.00 | Jun 15, 2026 | M | 1,056 | D | — | — | Common Stock | 1,056 | 33,810 | D |
Explanation of responses
- F1Restricted stock units convert into common stock on a one-for-one basis.
- F2On August 21, 2023, the reporting person was granted 12,624 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
- F3On February 2, 2024, the reporting person was granted 24,675 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
- F4On February 4, 2025, the reporting person was granted 50,712 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.