Michael Francis Miller - 31 Jul 2026 Form 4 Insider Report for Quanterix Corp (QTRX)

Reporting relationship: Chief Technology Officer
Issuer ticker: QTRX
Reported as of: 31 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Aug 2026, 16:45:11 UTC
Prior SEC filing: 16 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Meghan Shevlin, Attorney-in-Fact

Key filing fact

Michael Francis Miller filed Form 4 for Quanterix Corp (QTRX) on 04 Aug 2026.

Key facts

This page summarizes Michael Francis Miller's Form 4 filing for Quanterix Corp (QTRX).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 Aug 2026, 16:45.

Change

Previous filing in this sequence was filed on 16 Jul 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002120516 Primary reporting owner

Miller Michael Francis

Relationship: Chief Technology Officer
Address: C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA
Signature: /s/ Meghan Shevlin, Attorney-in-Fact
Signature date: 04 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

QTRX transaction

Common Stock

Options Exercise

Transaction value
Shares: +130
Change %: +0.36%
Price
Shares after: 36,198
Date: 31 Jul 2026
Ownership: Direct
Footnotes: F1

QTRX transaction

Common Stock

Tax liability

Transaction value
Shares: -39
Change %: -0.11%
Price: $3.48^*
Shares after: 36,159
Date: 31 Jul 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

QTRX transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -130
Change %: -45%
Price: $0.000000^*
Shares after: 159
Date: 31 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 130
Exercise price: $0.000000
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Restricted stock units convert into common stock on a one-for-one basis.

Footnote F2

On September 23, 2022, the reporting person was granted 6,278 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the last day of each month thereafter.