Quanterix Corp director Myla Lai-Goldman exercised restricted stock units into common shares. She converted 8,073 restricted stock units into 8,073 shares of Common Stock at a reported price of $0.00 per share, increasing her direct common stock holdings to 15,041 shares.
Following this transaction, she also holds 16,391 restricted stock units, which convert into common stock on a one-for-one basis. These units come from a prior grant of 24,464 restricted stock units awarded on July 8, 2025, vesting 33%, 33%, and 34% over three years.
Mendel Scott reported acquisition or exercise transactions in this Form 4 filing.
Quanterix Corp director Scott Mendel received a stock grant as board compensation. He was awarded 3,456 shares of Common Stock at a reference price of $4.34 per share, issued in lieu of cash fees for his service on the Board and its committees for the second quarter of 2026. Following this grant, he holds 16,837 common shares directly.
DONNELLY WILLIAM P reported acquisition or exercise transactions in this Form 4 filing.
Quanterix Corp director William P. Donnelly received 5,472 shares of Common Stock as a grant, valued at $4.34 per share. The award was granted in lieu of cash fees for his service on the company’s Board of Directors and its committees for the second quarter of 2026. After this compensation-related stock grant, he directly holds a total of 160,305 Quanterix common shares.
Quanterix Corp Chief Technology Officer Michael Francis Miller reported routine equity compensation activity involving restricted stock units. He exercised RSUs that converted into 130 shares of common stock on a one-for-one basis and a portion of the resulting shares, 39 in total, was disposed of to cover tax obligations. These transactions did not involve any open-market buying or selling and reflect standard mechanisms for settling equity awards and related taxes.
Quanterix Corp Chief Financial Officer Vandana Sriram reported routine equity compensation activity involving restricted stock units. On June 15, 2026, restricted stock units converted into 1,833 shares of common stock, and 548 shares were withheld at $3.10 per share to cover tax obligations.
These transactions reflect RSU vesting and related tax-withholding dispositions, not open-market trades. Following the transactions, Sriram directly owns 31,283 shares of Quanterix common stock. Footnotes state RSUs convert one-for-one into common stock and describe multi-year vesting schedules for prior RSU grants.
Quanterix Corp Chief Financial Officer Jason F. Faessler has filed an initial Form 3, which is the first statement of his beneficial ownership as an insider. The filing reports no transactions in Quanterix stock and no option exercises or other activity in this excerpt.
Quanterix Corp Chief Technology Officer Michael Francis Miller reported routine equity compensation activity on June 15, 2026. He exercised derivative awards for a total of 1,558 common shares and used 467 shares, valued at $3.10 each, to cover tax obligations. Following these transactions, he directly holds 33,851 shares of common stock, and restricted stock units continue to vest over time under previously granted awards.
Quanterix Corp Chief Commercial Officer Benjamin Meadows reported an open-market purchase of company stock. On May 12, 2026, he bought 3,500 shares of Common Stock at a price of $2.77 per share. Following this transaction, he directly holds 3,500 shares of Quanterix common stock.
Quanterix Corp filed an initial ownership report for Chief Commercial Officer Benjamin Meadows, outlining his equity-based compensation. Meadows holds 76,234 stock options with an exercise price of $5.88 per share, expiring on October 6, 2035, vesting 25% after one year and the rest in 36 monthly installments.
He was granted 22,959 restricted stock units on October 6, 2025 with 25% vesting after one year and the remaining 75% in 36 monthly installments. On February 15, 2026, he received 70,223 restricted stock units vesting 25% per year for four years, and 70,223 performance stock units that may vest in four equal annual installments once performance conditions under the 2026 Employee Equity Guidelines are met.
Quanterix Corporation reported the results of its 2026 annual shareholder meeting held on June 9, 2026. Stockholders elected William P. Donnelly and Ivana Magovčević-Liebisch, Ph.D., J.D. as independent directors for one-year terms and approved the advisory vote on executive compensation.
Shareholders also ratified KPMG LLP as the company’s independent registered public accounting firm for the fiscal year ending December 31, 2026. However, they did not approve an amendment and restatement of the 2017 Employee, Director and Consultant Equity Incentive Plan that would have extended the plan through June 9, 2031.