Form 4: Quanterix CEO's Tax-Related Stock Disposition

Quanterix Corporation's President & CEO, Masoud Toloue, reported a tax-related disposition of 1,242 common shares following the vesting of restricted stock units.

Summary

• Masoud Toloue, President & CEO and Director of Quanterix Corp (QTRX), reported a transaction on December 15, 2025.
• The transaction involved the disposition of 1,242 shares of Common Stock at a price of $7.41 per share.
• These shares were withheld by Quanterix Corporation solely to cover tax obligations upon the vesting of 3,722 restricted stock units (RSUs).
• Following this transaction, Masoud Toloue beneficially owns 508,704 shares of Common Stock, which includes 212,123 restricted stock units (RSUs).

Sentiment

Score: 5

Explanation: The transaction is a routine, non-discretionary disposition of shares to cover tax obligations upon RSU vesting, which is a neutral event for company sentiment.

Future Outlook

This filing does not contain any forward-looking statements or guidance.

Industry Context

This is a routine insider transaction related to compensation and tax obligations, and it does not provide specific insights into broader industry trends or competitive positioning.

Stakeholder Impact

• Shareholders: This is a routine, non-discretionary transaction by a key executive to cover tax liabilities upon RSU vesting and is unlikely to have a significant direct impact on shareholders.
• Employees: The vesting of RSUs is a standard component of executive compensation, reflecting the company's compensation structure.

Key Dates

Keywords

Quanterix, QTRX, Insider Transaction, Form 4, Stock Disposition, Restricted Stock Units, RSU Vesting, Tax Withholding, Masoud Toloue