Everett Cunningham - 19 Jan 2026 Form 4 Insider Report for Quanterix Corp (QTRX)

Reporting relationship: President and CEO, Director
Issuer ticker: QTRX
Reported as of: 19 Jan 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 21 Jan 2026, 16:15:00 UTC
Prior SEC filing: 08 Jul 2025
Source filing: View source filing
Reporting owner signature: /s/ Daniel Char, Attorney-in-Fact

Key filing fact

Everett Cunningham filed Form 4 for Quanterix Corp (QTRX) on 21 Jan 2026.

Key facts

This page summarizes Everett Cunningham's Form 4 filing for Quanterix Corp (QTRX).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 21 Jan 2026, 16:15.

Change

Previous filing in this sequence was filed on 08 Jul 2025.
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 0001564777 Primary reporting owner

Cunningham Everett

Relationship: President and CEO, Director
Address: C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA
Signature: /s/ Daniel Char, Attorney-in-Fact
Signature date: 20 Jan 2026

Reported derivative securities

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

QTRX transaction Derivative

Performance-Based Restricted Stock Units

Award

Transaction value: $0
Shares: +813,750
Change %
Price: $0.000000
Shares after: 813,750
Date: 19 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 813,750
Exercise price
Footnotes: F1

QTRX transaction Derivative

Time-Based Restricted Stock Units

Award

Transaction value: $0
Shares: +1,070,000
Change %: +131%
Price: $0.000000
Shares after: 1,883,750
Date: 19 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,070,000
Exercise price
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

Each performance-based restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. The performance-based RSUs vest upon the volume-weighted average price of the Issuer's common stock meeting certain thresholds within a four-year period, except as provided for under Section 8(y) of the Employment Agreement by and between the Issuer and the Reporting Person dated January 8, 2026.

Footnote F2

Each time-based RSU represents a contingent right to receive one share of the Issuer's common stock. The time-based RSUs vest as to one-fourth of the total number of shares on each of January 19, 2027, January 19, 2028, January 19, 2029 and January 19, 2030, except as provided for under Section 8(d) or 8(y) of the Employment Agreement by and between the Issuer and the Reporting Person dated January 8, 2026.