SEC Form 4 · accession 0001207928-26-000008
Quanterix Corp · QTRX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
William P Donnelly
Director
Period of report
Aug 12, 2026
Accepted (ET)
Aug 14, 2026 · 4:01 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,F2 | Aug 12, 2026 | P | 27,155 | $2.75 | A | 27,155 | I | See footnote |
| Common StockF3,F2 | Aug 13, 2026 | P | 72,245 | $2.93 | A | 99,400 | I | See Footnote |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.58 to $2.95, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
- F2Owned jointly by trusts established by the reporting person and his spouse.
- F3The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.85 to $3.13, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.