Quanterix Corp Chief Technology Officer Michael Francis Miller reported restricted stock unit conversions into common stock on October 15, 2026. The five conversions covered 1,558 RSUs, which convert one-for-one into common shares. Separately, 467 shares were delivered or withheld for payment of exercise price or tax liability, at a reported $3.07 per share.
Quanterix Corp director Ivana Magovcevic-Liebisch converted 4,224 restricted stock units into 4,224 common shares on October 2, 2026, on a one-for-one basis. After the conversion, she directly held 4,352 restricted stock units and 15,883 common shares. The units were part of a 12,800-unit grant dated October 2, 2024.
Quanterix Corp director Scott Mendel received a grant of 4,398 common shares on October 1, 2026, in lieu of cash fees for service on the board and its committees during the third quarter of 2026. The shares were directly held, and his reported direct common-stock position after the grant was 28,454 shares.
Quanterix Corp director William P. Donnelly acquired 6,964 shares of common stock on October 1, 2026, at a reported price of $3.41 per share. The shares were granted in lieu of cash fees for service on the company’s board and committees for the third quarter of 2026. Donnelly’s reported direct holdings after the transaction were 169,365 shares.
Quanterix Corp (QTRX) reported that Chief Commercial Officer James Edward Gute Jr. received a grant of 260,315 restricted stock units (RSUs) on September 15, 2026. The RSUs convert into common stock and vest in four equal annual installments on each of the first four anniversaries of the grant date, contingent on his continued employment. Following this award, he holds 260,315 RSUs directly.
Quanterix Corp (QTRX) reported that Chief Technology Officer Michael Francis Miller exercised restricted stock units into common stock on September 15, 2026. A total of 1,558 restricted stock units converted into common shares on a one-for-one basis, and 467 common shares were delivered or withheld to pay the exercise price or related tax liability at $2.72 per share. No Rule 10b5-1 trading plan is indicated for these transactions.
Quanterix Corp (QTRX) reported insider equity activity by Chief Technology Officer Michael Francis Miller. On August 31, 2026, 159 restricted stock units converted into 159 shares of common stock, and 48 of those shares were delivered or withheld at $2.67 per share for payment of exercise price or tax liability. The RSU award referenced in this filing was part of a 6,278-unit grant originally awarded on September 23, 2022, with vesting over four years.
Quanterix Corp (QTRX) director Jeffrey Thomas Elliott reported an exercise and conversion of restricted stock units (RSUs) into common stock. On August 19, 2026, 3,955 RSUs were converted into 3,955 shares of common stock on a one-for-one basis. Following the transactions, Elliott directly held 15,345 shares of common stock and 4,075 RSUs. The RSUs relate to a prior grant of 11,985 RSUs, vesting 33%, 33%, and 34% on the first, second, and third anniversaries of the August 19, 2024 grant date, respectively.
Quanterix Corp (ticker QTRX) reports that James Edward Gute Jr., its Chief Commercial Officer, has filed an initial statement of beneficial ownership of securities on Form 3. The filing shows no reportable holdings or transactions in Quanterix Corp securities as of this filing.
Quanterix Corp (QTRX) director William P. Donnelly reported the vesting and conversion of restricted stock units into common stock. On 2026-08-17, 2,802 restricted stock units converted into 2,802 shares of common stock on a one-for-one basis, eliminating that RSU position. Following this transaction, Donnelly directly holds 162,401 shares of Quanterix common stock.