Quanterix Corp Insider Trading Activity
Every SEC Form 4 insider transaction reported for Quanterix Corp (QTRX), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are QTRX insiders buying or selling?
In the last 12 months, Quanterix Corp insiders reported 2 open-market purchases ($296.0K) and 0 sales ($0) — net buying of $296.0K. Since June 2018, Trabud has recorded 324 Form 4 filings for QTRX: 19 buys ($11.6M) and 305 sells ($34.4M).
Source: SEC EDGAR Form 4
What stands out
- The largest open-market purchase in the last 12 months was $286.4K by William P Donnelly (Director) on Aug 14, 2026. SEC ↗
- The most recent open-market purchase was reported on Aug 14, 2026 (2 months ago).
Key Statistics (June 2018 – Aug 14, 2026)
Total Form 4 filings
324
SEC EDGAR
Insider filers
20
Insider buys (19)
$11.6M
Insider sells (305)
$34.4M
Insider sentiment
Net sellingNet insider flow of $22.8M in net selling since June 2018, and $296.0K in net buying over the last 12 months. 1 insider buy in the last 90 days.
Recent QTRX insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Aug 14, 2026 | William P Donnelly | Director | Purchase | 99.4K | $2.88 | $286.4K | SEC ↗ |
| Jun 12, 2026 | Benjamin Meadows | Chief Commercial Officer | Purchase | 3.5K | $2.77 | $9.7K | SEC ↗ |
| Sep 17, 2025 | Vandana Sriram | Chief Financial Officer | Purchase | 4.2K | $4.79 | $19.9K | SEC ↗ |
| Jun 13, 2025 | David R Walt | Director | Purchase | 160.0K | $6.16 | $985.0K | SEC ↗ |
| Jun 10, 2025 | Masoud Toloue | President & CEO | Purchase | 45.9K | $5.42 | $248.7K | SEC ↗ |
| Jun 9, 2025 | David R Walt | Director | Purchase | 210.0K | $5.40 | $1.1M | SEC ↗ |
| Jun 9, 2025 | William P Donnelly | Director | Purchase | 93.1K | $5.44 | $506.3K | SEC ↗ |
| Sep 17, 2024 | David R Walt | Director | Purchase | 47.0K | $13.29 | $624.6K | SEC ↗ |
| Aug 15, 2024 | Masoud Toloue | President & CEO | Purchase | 19.0K | $10.90 | $207.1K | SEC ↗ |
| May 14, 2024 | Laurie J Olson | Director | Sale | 1.5K | $16.98 | $25.5K | SEC ↗ |
| Apr 2, 2024 | Laurie J Olson | Director | Sale | 1.0K | $23.50 | $23.5K | SEC ↗ |
| Feb 15, 2024 | Laurie J Olson | Director | Sale | 1.5K | $24.35 | $36.5K | SEC ↗ |
| Jan 4, 2024 | Laurie J Olson | Director | Sale | 1.0K | $26.91 | $26.9K | SEC ↗ |
| Nov 14, 2023 | Laurie J Olson | Director | Sale | 1.5K | $21.89 | $32.8K | SEC ↗ |
| Sep 11, 2023 | William P Donnelly | Director | Purchase | 20.2K | $24.85 | $502.0K | SEC ↗ |
| Aug 16, 2022 | Michael A Doyle | CFO and Treasurer | Purchase | 30.0K | $10.30 | $308.9K | SEC ↗ |
| Aug 16, 2022 | Masoud Toloue | President & CEO | Purchase | 105.0K | $10.43 | $1.1M | SEC ↗ |
| Aug 11, 2022 | Sarah E. Hlavinka | Director | Purchase | 10.2K | $9.89 | $100.4K | SEC ↗ |
| Aug 10, 2022 | David R Walt | Director | Purchase | 150.0K | $8.62 | $1.3M | SEC ↗ |
| Aug 10, 2022 | Paul M Meister | Director | Purchase | 234.3K | $8.53 | $2.0M | SEC ↗ |
| Aug 10, 2022 | Martin D Madaus | Director | Purchase | 89.7K | $8.43 | $755.5K | SEC ↗ |
| Aug 3, 2022 | Masoud Toloue | President & CEO | Sale | 446 | $15.61 | $7.0K | SEC ↗ |
| Aug 3, 2022 | Michael A Doyle | CFO and Treasurer | Sale | 471 | $17.96 | $8.5K | SEC ↗ |
| Aug 3, 2022 | John J Fry | General Counsel & Secretary | Sale | 401 | $15.61 | $6.3K | SEC ↗ |
| Jul 6, 2022 | Kevin E Hrusovsky | Executive Chairman | Sale | 960 | $16.57 | $15.9K | SEC ↗ |
Showing the 25 most recent of 324 Form 4 filings for Quanterix Corp.
Most active QTRX insiders
- Kevin E Hrusovsky90 filings
- Dawn Mattoon44 filings
- Mark T. Roskey44 filings
- David C. Duffy35 filings
- John J Fry29 filings
Ask anything about QTRX insider activity
Use Trabud's AI agent to query Quanterix Corp's Form 4 history in plain English — "Show me QTRX CEO purchases this year" or compare it against any other ticker.
Open the AI agentQTRX insider trading FAQ
Are Quanterix Corp insiders buying or selling?
In the last 12 months, Quanterix Corp insiders reported 2 open-market purchases ($296.0K) and 0 sales ($0) — net buying of $296.0K. Since June 2018, Trabud has recorded 324 Form 4 filings for QTRX: 19 buys ($11.6M) and 305 sells ($34.4M). Over the full record that is net selling of $22.8M.
How many insiders trade QTRX stock?
20 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Quanterix Corp. The most recent filing was accepted on Aug 14, 2026.
Where does Trabud get QTRX insider trading data?
All QTRX insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.