Every Form 4 that Quanterix Corporation (QTRX) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow QTRX and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full QTRX filings page.
Quanterix (QTRX) reported an insider tax-withholding event by its President & CEO and Director. On October 31, 2025, 254 shares of common stock were withheld at $5.34 to cover taxes upon vesting of 761 RSUs.
After this transaction, the insider beneficially owns 511,442 shares, which includes 219,086 RSUs. The filing reflects routine administration of equity compensation rather than an open‑market sale.