William P. Donnelly - Oct 1, 2025 Form 4 Insider Report for Quanterix Corp (QTRX)

Role
Director
Signature
/s/ Brian Keane, as Attorney-in-Fact
Stock symbol
QTRX
Transactions as of
Oct 1, 2025
Transactions value $
$28,121
Form type
4
Date filed
10/3/2025, 08:54 PM
Previous filing
Sep 30, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
DONNELLY WILLIAM P Director C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA /s/ Brian Keane, as Attorney-in-Fact 2025-10-01 0001207928

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction QTRX Common Stock Award $28.1K +5.08K +3.54% $5.54 148K Oct 1, 2025 Direct F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Consists of stock granted in lieu of cash fees for service on the Company's Board of Directors and committees thereof for the third quarter of 2025.
F2 Closing price of the Company's common stock on the Nasdaq Global Market on October 1, 2025.
F3 Includes 12,955 restricted stock units.