Masoud Toloue - Oct 31, 2025 Form 4 Insider Report for Quanterix Corp (QTRX)

Role
President & CEO, Director
Signature
/s/ Brian Keane, as Attorney-in-Fact
Stock symbol
QTRX
Transactions as of
Oct 31, 2025
Transactions value $
-$1,356
Form type
4
Date filed
11/5/2025, 01:12 PM
Previous filing
Oct 17, 2025
Next filing
Nov 24, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Toloue Masoud President & CEO, Director C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA /s/ Brian Keane, as Attorney-in-Fact 2025-11-04 0001867276

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction QTRX Common Stock Tax liability -$1.36K -254 -0.05% $5.34 511K Oct 31, 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Shares withheld by Quanterix Corporation solely to cover tax obligations upon vesting of 761 restricted stock units (RSUs).
F2 Includes 219,086 RSUs