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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 Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Quick Answer
Are QTRX insiders buying or selling?
Quanterix Corp insiders reported 19 open-market buys ($11.6M) and 305 sells ($34.4M) across 324 Form 4 filings — a net selling position of $22.8M.
Source: SEC EDGAR Form 4
Key Statistics (as of 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. 2 insider buys in the last 90 days.
Recent QTRX insider transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 14, 2026 | William P Donnelly | Director | Purchase | 99.4K | $2.88 | $286.4K |
| Jun 12, 2026 | Benjamin Meadows | Chief Commercial Officer | Purchase | 3.5K | $2.77 | $9.7K |
| Sep 17, 2025 | Vandana Sriram | Chief Financial Officer | Purchase | 4.2K | $4.79 | $19.9K |
| Jun 13, 2025 | David R Walt | Director | Purchase | 160.0K | $6.16 | $985.0K |
| Jun 10, 2025 | Masoud Toloue | President & CEO | Purchase | 45.9K | $5.42 | $248.7K |
| Jun 9, 2025 | David R Walt | Director | Purchase | 210.0K | $5.40 | $1.1M |
| Jun 9, 2025 | William P Donnelly | Director | Purchase | 93.1K | $5.44 | $506.3K |
| Sep 17, 2024 | David R Walt | Director | Purchase | 47.0K | $13.29 | $624.6K |
| Aug 15, 2024 | Masoud Toloue | President & CEO | Purchase | 19.0K | $10.90 | $207.1K |
| May 14, 2024 | Laurie J Olson | Director | Sale | 1.5K | $16.98 | $25.5K |
| Apr 2, 2024 | Laurie J Olson | Director | Sale | 1.0K | $23.50 | $23.5K |
| Feb 15, 2024 | Laurie J Olson | Director | Sale | 1.5K | $24.35 | $36.5K |
| Jan 4, 2024 | Laurie J Olson | Director | Sale | 1.0K | $26.91 | $26.9K |
| Nov 14, 2023 | Laurie J Olson | Director | Sale | 1.5K | $21.89 | $32.8K |
| Sep 11, 2023 | William P Donnelly | Director | Purchase | 20.2K | $24.85 | $502.0K |
| Aug 16, 2022 | Michael A Doyle | CFO and Treasurer | Purchase | 30.0K | $10.30 | $308.9K |
| Aug 16, 2022 | Masoud Toloue | President & CEO | Purchase | 105.0K | $10.43 | $1.1M |
| Aug 11, 2022 | Sarah E. Hlavinka | Director | Purchase | 10.2K | $9.89 | $100.4K |
| Aug 10, 2022 | David R Walt | Director | Purchase | 150.0K | $8.62 | $1.3M |
| Aug 10, 2022 | Paul M Meister | Director | Purchase | 234.3K | $8.53 | $2.0M |
| Aug 10, 2022 | Martin D Madaus | Director | Purchase | 89.7K | $8.43 | $755.5K |
| Aug 3, 2022 | Masoud Toloue | President & CEO | Sale | 446 | $15.61 | $7.0K |
| Aug 3, 2022 | Michael A Doyle | CFO and Treasurer | Sale | 471 | $17.96 | $8.5K |
| Aug 3, 2022 | John J Fry | General Counsel & Secretary | Sale | 401 | $15.61 | $6.3K |
| Jul 6, 2022 | Kevin E Hrusovsky | Executive Chairman | Sale | 960 | $16.57 | $15.9K |
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?
Across 324 SEC Form 4 filings, Quanterix Corp (QTRX) insiders reported 19 open-market purchases totaling $11.6M and 305 sales totaling $34.4M. That is a net selling position 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.
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