Quanterix Corp insiders have been one-way buyers this past year: two people put roughly $296,000 into the stock and nobody sold on the open market.
The largest purchase came from DONNELLY WILLIAM P (Director), about $212,000.
Zooming out by quarter: 2 quarters in a row of net buying by insiders. Insiders bought in 4 of the last 7 full quarters. Big money check: 133 institutions held QTRX as of Q2 2026, and more funds bought than sold.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Aug 14, 2026 | DONNELLY WILLIAM P | Director | Buy | 27,155 | $2.75 | $75K | SEC |
| Aug 14, 2026 | DONNELLY WILLIAM P | Director | Buy | 72,245 | $2.93 | $212K | SEC |
| Jun 12, 2026 | Meadows Benjamin | Executive Officer | Buy | 3,500 | $2.77 | $10K | SEC |
| Sep 17, 2025 | Sriram Vandana | CFO | Buy | 4,150 | $4.79 | $20K | SEC |
| Jun 13, 2025 | WALT DAVID R | Director | Buy | 36,010 | $6.23 | $224K | SEC |
| Jun 13, 2025 | WALT DAVID R | Director | Buy | 123,990 | $6.14 | $761K | SEC |
| Jun 10, 2025 | Toloue Masoud | CEO | Buy | 45,900 | $5.42 | $249K | SEC |
| Jun 9, 2025 | WALT DAVID R | Director | Buy | 131,869 | $5.43 | $716K | SEC |
| Jun 9, 2025 | WALT DAVID R | Director | Buy | 78,131 | $5.34 | $417K | SEC |
| Jun 9, 2025 | DONNELLY WILLIAM P | Director | Buy | 93,113 | $5.44 | $507K | SEC |
| Sep 17, 2024 | WALT DAVID R | Director | Buy | 47,000 | $13.29 | $625K | SEC |
| Aug 15, 2024 | Toloue Masoud | CEO | Buy | 19,000 | $10.90 | $207K | SEC |
| May 14, 2024 | OLSON LAURIE J | Director | Sell | 1,500 | $16.98 | $25K | SEC |
| Apr 2, 2024 | OLSON LAURIE J | Director | Sell | 1,000 | $23.50 | $24K | SEC |
| Feb 15, 2024 | OLSON LAURIE J | Director | Sell | 1,500 | $24.35 | $37K | SEC |
In the last 12 months Quanterix Corp insiders made open-market purchases worth about $296,000 and sales worth about $0. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in QTRX was filed on 2026-08-14.
133 investment managers reported holding QTRX in SEC Form 13F filings for Q2 2026.
No congressional trades in QTRX were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).