Company profile
Quanterix Corp Insider Trading
QTRXEvery SEC Form 4 insider trading filing for Quanterix Corp (QTRX) since April 2023: open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Laboratory Analytical Instruments
- CIK
- 0001503274
- Filings
- 196
- Insiders
- 23
- Last filing
- 2026-09-15
Activity summary
No discretionary insider buying or selling in the last 30 days. The 19 transactions filed were grants, option exercises or other non-open-market activity.
Three year balance
Buy and sell value by quarter, Q4 23 to Q3 26. Quanterix Corp insiders are net buyers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $2.9M.
90 day insight
Over the last 90 days, Quanterix Corp insiders bought $286K across 2 transactions with no open-market sales.
- Most active insider: Michael Francis Miller with 42 transactions totaling $3K.
- Largest single purchase: $212K by William P Donnelly on Aug 13, 2026.
Activity skews bullish: buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
Showing 5 of 50 transactions. The most significant are picked first.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | Michael Francis Miller | QTRX | Option Exercise | 81 | — | — |
| Sep 15, 2026 | Michael Francis Miller | QTRX | Tax Withholding | 25 | $2.72 | $68 |
| Sep 15, 2026 | Michael Francis Miller | QTRX | Option Exercise | 136 | — | — |
| Aug 13, 2026 | William P Donnelly | QTRX | Purchase | 72,245 | $2.93 | $212K |
| Aug 12, 2026 | William P Donnelly | QTRX | Purchase | 27,155 | $2.75 | $75K |
45 more transactions hidden
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-H "X-Api-Key: $KEY"Institutional Ownership
Top 13F-HR holders of Quanterix Corp as of 2026-06-30
Data source: quarterly 13F-HR filings: institutional holders report positions within 45 days of quarter end. Joined with insider activity above: see who's loading up institutionally while insiders are trading. Full 13F-HR API →