Toloue Masoud 4
4 · Quanterix Corp · Filed Jan 20, 2026
Insider Transaction Report
Form 4Exit
Quanterix CorpQTRX
Toloue Masoud
DirectorPresident & CEO
Transactions
- Tax Payment
Common Stock
[F1][F2][F3]2026-01-15$7.95/sh−1,817$14,445→ 507,310 total
Footnotes (3)
- [F1]Shares withheld by Quanterix Corporation solely to cover tax obligations upon vesting of 3,722 restricted stock units (RSUs).
- [F2]QTRX year-end reconciliation revealed a variance of 681 shares. Corrected balance as shown
- [F3]Includes 206,398 RSUs.
Signature
/s/ Bonnie McManus, Attorney-in-Fact|2026-01-20