Masoud Toloue - 16 Jan 2026 Form 4 Insider Report for Quanterix Corp (QTRX)

Role
President & CEO, Director
Signature
/s/ Bonnie McManus, Attorney-in-Fact
Issuer symbol
QTRX
Transactions as of
16 Jan 2026
Net transactions value
-$14,445
Form type
4
Filing time
20 Jan 2026, 16:37:02 UTC
Previous filing
05 Jan 2026
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/ Bonnie McManus, Attorney-in-Fact 20 Jan 2026 0001867276

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction QTRX Common Stock Tax liability $14,445 -1,817 -0.36% $7.95 507,310 15 Jan 2026 Direct F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Masoud Toloue is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id Content
F1 Shares withheld by Quanterix Corporation solely to cover tax obligations upon vesting of 3,722 restricted stock units (RSUs).
F2 QTRX year-end reconciliation revealed a variance of 681 shares. Corrected balance as shown
F3 Includes 206,398 RSUs.