<div id="readability-page-1"><div>Sriram Vandana Chief Financial Officer of Quanterix Corp [QTRX] filed a Form 4 on November 24, 2025 with the Securities and Exchange Commission disclosing the following changes in ownership:<div><table><tbody><tr><th>Date</th><th>Transaction</th><th>Shares</th><th>Price</th><th>Value</th></tr><tr><td>11/15/25</td><td>Exercise</td><td>777</td><td>$0.00</td><td>N/A</td></tr><tr><td>11/15/25</td><td>Surrender(1)</td><td>229</td><td>$5.78</td><td>$1,324</td></tr></tbody></table></div>Ending Holdings: 86,206 - Direct<ul><li>(1)</li><li>Surrender of shares back to company to pay option exercise cost and/or resulting tax liability.</li></ul>For a free trial, or to learn more about our insider trading analysis and data services, please visit http://www.washingtonservice.com or contact us at (301) 913-5100 or send an email to info@washingtonservice.com.Founded in 1970, The Washington Service provides securities professionals with financial, economic and public policy research and data. </div></div>

QTRX

Sriram Vandana, CFO of Quanterix Corp [QTRX], filed a Form 4 on November 24, 2025, disclosing changes in ownership. Transactions included exercising 777 shares and surrendering 229 shares at $5.78 each. Ending holdings are 86,206 shares directly. Surrendered shares were to cover option exercise costs and/or tax liabilities.

CFO Sriram Acquires 548 Of Quanterix Corp [QTRX]