Daniel Char - 23 Feb 2026 Form 3 Insider Report for Quanterix Corp (QTRX)

Reporting relationship: Chief Legal Officer
Issuer ticker: QTRX
Reported as of: 23 Feb 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 24 Mar 2026, 16:06:50 UTC
Prior SEC filing: 12 Feb 2024
Source filing: View source filing
Reporting owner signature: /s/ Bonnie McManus, Attorney-in-Fact

Key filing fact

Daniel Char filed Form 3 for Quanterix Corp (QTRX) on 24 Mar 2026.

Key facts

This page summarizes Daniel Char's Form 3 filing for Quanterix Corp (QTRX).
0 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 24 Mar 2026, 16:06.

Change

Previous filing in this sequence was filed on 12 Feb 2024.
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

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0001757122 Primary reporting owner

Char Daniel

Relationship: Chief Legal Officer
Address: C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA
Signature: /s/ Bonnie McManus, Attorney-in-Fact
Signature date: 24 Mar 2026

Reported derivative securities

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

QTRX holding Derivative

Restricted Stock Unit

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 23 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 33,962
Exercise price: $0.000000
Footnotes: F1

QTRX holding Derivative

Stock Options (Right to buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 23 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 113,171
Exercise price: $7.95
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

On January 15, 2026, the reporting person was granted 33,962 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 15th day of each month thereafter.

Footnote F2

On January 15, 2026, the reporting person was granted 113,171 stock options, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.