Quanterix (QTRX) Director William Donnelly Converts 2,802 RSUs

What Happened William P. Donnelly, a director of Quanterix Corp (QTRX), had 2,802 restricted stock units (RSUs) convert into 2,802 common shares on August 17, 2026. The Form 4 shows an “acquired” entry for 2,802 shares (conversion/exercise of a derivative, code M) and a simultaneous “disposed” entry of 2,802 shares at $0.00. There were no cash proceeds reported from the disposition.

Key Details

• Transaction date: August 17, 2026; Form 4 filed August 19, 2026 (timely).
• Acquired: 2,802 shares via conversion of RSUs (derivative; code M); price listed as N/A.
• Disposed: 2,802 shares at $0.00 (no cash proceeds reported).
• Shares owned after transaction: not specified in the provided filing excerpt.
• Footnotes: F1 — RSUs convert to common stock one-for-one. F2 — original grant (8,238 RSUs) was on Aug 17, 2023 with 33%/33%/34% annual vesting (the 34% tranche equals 2,802 RSUs).
• No 10b5-1 plan or other special plan noted in the excerpt; disposition at $0.00 is recorded but not explicitly explained in the filing.

Context This was a routine vesting/conversion of RSUs rather than an open-market purchase or sale for cash. The matched $0.00 disposition on the Form 4 commonly reflects shares withheld to satisfy tax or withholding obligations, though the filing does not explicitly state that in this case. Such conversion events are neutral from a cash-flow perspective for the insider and do not by themselves indicate a buy or sell sentiment.