Quanterix (QTRX) Director Elliott Converts 3,955 RSUs

What Happened
Elliott Jeffrey Thomas, a director of Quanterix Corp (QTRX), reported the conversion (exercise) on 2026-08-19 of 3,955 restricted stock units (RSUs) into 3,955 shares of common stock. The filing also shows a simultaneous disposition of 3,955 shares at $0.00 (derivative entry). No cash proceeds were reported for the disposition.

Key Details

• Transaction date: August 19, 2026; Form filed August 20, 2026 (timely).
• Reported activity: Code M — exercise/conversion of derivative (RSU conversion).
• Shares acquired: 3,955 common shares (from RSU conversion).
• Shares disposed: 3,955 shares at $0.00 (reported as a derivative disposition).
• Shares owned after transaction: not disclosed in the filing.
• Footnotes: F1 — RSUs convert one-for-one into common stock. F2 — these RSUs were originally granted Aug 19, 2024 (11,985 RSUs) and vest 33% / 33% / 34% on each anniversary; the 3,955 shares represent the 33% tranche that vested on Aug 19, 2026.
• Typical interpretation: a $0.00 disposition line commonly reflects shares withheld to satisfy tax obligations upon vesting (filing shows the conversion and the matching disposition).

Context
This transaction reflects routine compensation vesting (an award converting to stock), not an open-market buy or sale expressing a trading view. After the two 33% vestings (2025 and 2026), the remaining ~4,075 RSUs (34% of the original grant) are scheduled to vest on the third anniversary (Aug 19, 2027).