Mendel Scott 4

What Happened

• Mendel Scott, a director of Quanterix Corp (QTRX), had 8,073 restricted stock units (RSUs) vest and convert into 8,073 common shares on July 8, 2026. The same 8,073 shares were then disposed of at $0.00 (reported as a derivative disposition), indicating they were surrendered rather than sold on the open market.

Key Details

• Transaction date: July 8, 2026; Form 4 filed July 9, 2026 (timely).
• Acquired via conversion: 8,073 shares (code M — exercise/conversion of derivative).
• Disposed: 8,073 shares at $0.00 (reported as derivative disposition).
• Shares owned after the transaction: not specified in the filing.
• Footnotes: F1 — RSUs convert one-for-one into common stock; F2 — these RSUs were part of a 24,464 RSU grant on July 8, 2025 that vests 33%/33%/34% annually (8,073 represents the ~33% tranche).
• No cash proceeds reported — this is not an open-market sale.

Context

• This transaction reflects RSU vesting and a simultaneous surrender of the vested shares (commonly done to satisfy tax withholding obligations). It is not a market sale and does not necessarily indicate a change in insider sentiment.
• Code M denotes conversion/exercise of a derivative; here it reflects RSU conversion. No purchase (P) or sale (S) for cash was reported.