SEC Form 4 · accession 0001207928-26-000009
Quanterix Corp · QTRX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
William P Donnelly
Director
Period of report
Aug 17, 2026
Accepted (ET)
Aug 19, 2026 · 6:37 am 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 | Aug 17, 2026 | M | 2,802 | — | A | 162,401 | 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 | Aug 17, 2026 | M | 2,802 | D | — | — | Common Stock | 2,802 | 0 | D |
Explanation of responses
- F1Restricted stock units convert into common stock on a one-for-one basis.
- F2On August 17, 2023, the reporting person was granted 8,238 restricted stock units, vesting 33%, 33%, and 34% on the first, second, and third anniversaries of the grant date, respectively.