Key facts
- This page summarizes Masoud Toloue's Form 4 filing for Quanterix Corp (QTRX).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 20 Jan 2026, 16:37.
Masoud Toloue - 16 Jan 2026 Form 4 Insider Report for Quanterix Corp (QTRX)
- Reporting relationship
- President & CEO, Director
- Issuer ticker
- QTRX
- Reported as of
- 16 Jan 2026
- Net transaction value
- -$14,445
- SEC form
- 4
- Accepted by SEC
- 20 Jan 2026, 16:37:02 UTC
- Prior SEC filing
- 05 Jan 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Bonnie McManus, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Masoud Toloue filed Form 4 for Quanterix Corp (QTRX) on 20 Jan 2026.
Change
- Previous filing in this sequence was filed on 05 Jan 2026.
- Current net transaction value: -$14,445.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001867276
Primary reporting owner
Toloue Masoud
- Relationship
- President & CEO, Director
- Address
- C/O QUANTERIX CORPORATION, 900 MIDDLESEX TURNPIKE, BILLERICA
- Signature
- /s/ Bonnie McManus, Attorney-in-Fact
- Signature date
- 20 Jan 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
QTRX
transaction
Common Stock
Tax liability
- Transaction value
- $14,445
- Shares
- -1,817
- Change %
- -0.36%
- Price
- $7.95
- Shares after
- 507,310
- Date
- 15 Jan 2026
- Ownership
- Direct
- Footnotes
- F1, F2, F3
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Section 16 status
Masoud Toloue is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.
Explanation of responses 3 footnotes
Footnote F1
Shares withheld by Quanterix Corporation solely to cover tax obligations upon vesting of 3,722 restricted stock units (RSUs).
Footnote F2
QTRX year-end reconciliation revealed a variance of 681 shares. Corrected balance as shown
Footnote F3
Includes 206,398 RSUs.