QTRX (Quanterix Corporation Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by QTRX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-01 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-08-20 | Jeffrey Thomas Elliott | Director | M | — | — |
| 2026-08-19 | WILLIAM P DONNELLY | Director | M | — | — |
| 2026-08-17 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-08-14 | WILLIAM P DONNELLY | Director | Buy | — | — |
| 2026-08-04 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-07-16 | Jason F. Faessler | Chief Financial Officer | A | — | — |
| 2026-07-16 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-07-09 | GOLDMAN MYLA LAI | Director | M | — | — |
| 2026-07-09 | Scott Mendel | Director | M | — | — |
| 2026-07-02 | WILLIAM P DONNELLY | Director | A | — | — |
| 2026-07-02 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-07-02 | Scott Mendel | Director | A | — | — |
| 2026-06-23 | Vandana Sriram | Chief Financial Officer | MIXED | — | — |
| 2026-06-16 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-06-12 | Benjamin Meadows | Chief Commercial Officer | Buy | — | — |
| 2026-06-01 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-05-18 | Vandana Sriram | Chief Financial Officer | MIXED | — | — |
| 2026-05-18 | Michael Francis Miller | Chief Technology Officer | MIXED | — | — |
| 2026-05-01 | Michael Francis Miller | Chief Operating Officer | MIXED | — | — |
| 2026-04-17 | Vandana Sriram | Chief Financial Officer | MIXED | — | — |
| 2026-04-17 | Michael Francis Miller | Chief Operating Officer | MIXED | — | — |
| 2026-04-07 | Scott Mendel | Director | A | — | — |
| 2026-04-07 | WILLIAM P DONNELLY | Executive Chair | A | — | — |
| 2026-04-02 | Michael Francis Miller | Chief Operating Officer | MIXED | — | — |
| 2026-03-17 | Michael Francis Miller | Chief Operating Officer | MIXED | — | — |
| 2026-03-16 | Vandana Sriram | Chief Financial Officer | MIXED | — | — |
| 2026-02-18 | Vandana Sriram | Chief Financial Officer | MIXED | — | — |
| 2026-02-06 | Vandana Sriram | Chief Financial Officer | F | — | — |
| 2026-01-21 | Everett Cunningham | President and CEO | A | — | — |
| 2026-01-20 | Masoud Toloue | President & CEO | F | — | — |
| 2026-01-20 | Vandana Sriram | Chief Financial Officer | F | — | — |
| 2026-01-15 | Ivana Magovcevic-Liebisch | Director | A | — | — |
| 2026-01-15 | PAUL M MEISTER | Director | A | — | — |
| 2026-01-14 | Jeffrey Thomas Elliott | Director | A | — | — |
| 2026-01-06 | Karen Flynn | Director | A | — | — |
| 2026-01-06 | DAVID R WALT | Director | A | — | — |
| 2026-01-06 | Malcolm Garret Hampton | Director | A | — | — |
| 2026-01-06 | WILLIAM P DONNELLY | Executive Chair | A | — | — |
| 2026-01-06 | GOLDMAN MYLA LAI | Director | A | — | — |
| 2026-01-06 | Alan Bruce Sachs | Director | A | — | — |
| 2026-01-06 | Scott Mendel | Director | A | — | — |
| 2026-01-05 | Masoud Toloue | President & CEO | F | — | — |
| 2025-12-18 | Masoud Toloue | President & CEO | F | — | — |
| 2025-12-18 | Vandana Sriram | Chief Financial Officer | F | — | — |
| 2025-12-08 | Alan Bruce Sachs | Director | A | — | — |
| 2025-12-03 | Masoud Toloue | President & CEO | F | — | — |
| 2025-11-25 | Malcolm Garret Hampton | Director | A | — | — |
| 2025-11-24 | Vandana Sriram | Chief Financial Officer | F | — | — |
| 2025-11-24 | Masoud Toloue | President & CEO | F | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 2,055,632 | — |
| — | 10%+ Owner | 1,906,335 | — |
| — | 10%+ Owner | 1,901,515 | — |
| — | Director | 1,872,890 | — |
| — | 10%+ Owner | 1,443,683 | — |
| — | Executive Chairman | 910,249 | — |
| — | President & CEO | 507,310 | — |
| — | Director | 313,253 | — |
| — | Director | 308,483 | — |
| — | Director | 291,541 | — |
| — | Executive Chair | 261,801 | — |
| — | CFO and Treasurer | 88,332 | — |
| — | Director | 70,099 | — |
| — | Director | 70,099 | — |
| — | Director | 60,070 | — |
| — | Director | 57,212 | — |
| — | SVP R&D and CTO | 54,730 | — |
| — | SVP Finance and Corporate Dev | 48,802 | — |
| — | Chief Operating Officer | 44,951 | — |
| — | Director | 43,607 | — |
| — | General Counsel & Secretary | 37,671 | — |
| — | Chief Technology Officer | 37,361 | — |
| — | Sr. VP, Diagnostics | 36,876 | — |
| — | SVP, Corp Dev & Strategy | 32,515 | — |
| — | Chief Financial Officer | 31,283 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the QTRX quote page; the site-wide leaderboard is on the insider transactions hub.