QTRX · Insider Trading
Quanterix Corporation Common Stock
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-16 | Michael Francis Miller | Chief Technology Officer | MIXED | +1,091 | −$1.43K |
| 2026-10-02 | Ivana Magovcevic-Liebisch | Director | M | +4,224 | — |
| 2026-10-02 | William P Donnelly | Director | A | +6,964 | +$23.75K |
| 2026-10-02 | Scott Mendel | Director | A | +4,398 | +$15.00K |
| 2026-09-17 | James Edward Gute Jr. | Chief Commercial Officer | A | +260,315 deriv. | — |
| 2026-09-16 | Michael Francis Miller | Chief Technology Officer | MIXED | +1,091 | −$1.27K |
| 2026-09-01 | Michael Francis Miller | Chief Technology Officer | MIXED | +111 | −$128 |
| 2026-08-20 | Jeffrey Thomas Elliott | Director | M | +3,955 | — |
| 2026-08-19 | William P Donnelly | Director | M | +2,802 | — |
| 2026-08-17 | Michael Francis Miller | Chief Technology Officer | MIXED | +1,091 | −$1.21K |
| 2026-08-14 | William P Donnelly | Director | Buy | +99,400 | +$286.35K |
| 2026-08-04 | Michael Francis Miller | Chief Technology Officer | MIXED | +91 | −$136 |
| 2026-07-16 | Jason F. Faessler | Chief Financial Officer | A | +141,820 deriv. | — |
| 2026-07-16 | Michael Francis Miller | Chief Technology Officer | MIXED | +1,091 | −$1.98K |
| 2026-07-09 | Goldman Myla Lai | Director | M | +8,073 | — |
| 2026-07-09 | Scott Mendel | Director | M | +8,073 | — |
| 2026-07-02 | William P Donnelly | Director | A | +5,472 | +$23.75K |
| 2026-07-02 | Michael Francis Miller | Chief Technology Officer | MIXED | +91 | −$168 |
| 2026-07-02 | Scott Mendel | Director | A | +3,456 | +$15.00K |
| 2026-06-23 | Vandana Sriram | Chief Financial Officer | MIXED | +1,285 | −$1.70K |
| 2026-06-16 | Michael Francis Miller | Chief Technology Officer | MIXED | +1,091 | −$1.45K |
| 2026-06-12 | Benjamin Meadows | Chief Commercial Officer | Buy | +3,500 | +$9.70K |
| 2026-06-01 | Michael Francis Miller | Chief Technology Officer | MIXED | +91 | −$119 |
| 2026-05-18 | Vandana Sriram | Chief Financial Officer | MIXED | +1,285 | −$1.51K |
| 2026-05-18 | Michael Francis Miller | Chief Technology Officer | MIXED | +1,091 | −$1.28K |
| 2026-05-01 | Michael Francis Miller | Chief Operating Officer | MIXED | +91 | −$122 |
| 2026-04-17 | Vandana Sriram | Chief Financial Officer | MIXED | +1,285 | −$1.97K |
| 2026-04-17 | Michael Francis Miller | Chief Operating Officer | MIXED | +1,091 | −$1.68K |
| 2026-04-07 | Scott Mendel | Director | A | +4,310 | — |
| 2026-04-07 | William P Donnelly | Executive Chair | A | +6,178 | — |
| 2026-04-02 | Michael Francis Miller | Chief Operating Officer | MIXED | +160 | −$243 |
| 2026-03-17 | Michael Francis Miller | Chief Operating Officer | MIXED | +1,009 | −$2.59K |
| 2026-03-16 | Vandana Sriram | Chief Financial Officer | MIXED | +1,188 | −$3.04K |
| 2026-02-18 | Vandana Sriram | Chief Financial Officer | MIXED | +506 | −$1.56K |
| 2026-02-06 | Vandana Sriram | Chief Financial Officer | F | −4,395 | — |
| 2026-01-21 | Everett Cunningham | President and CEO | A | +1,883,750 deriv. | — |
| 2026-01-20 | Masoud Toloue | President & CEO | F | −1,817 | −$14.45K |
| 2026-01-20 | Vandana Sriram | Chief Financial Officer | F | −274 | −$2.18K |
| 2026-01-15 | Ivana Magovcevic-Liebisch | Director | A | +23,372 | — |
| 2026-01-15 | Paul M Meister | Director | A | +3,974 | — |
| 2026-01-14 | Jeffrey Thomas Elliott | Director | A | +23,372 | — |
| 2026-01-06 | Karen Flynn | Director | A | +23,372 | — |
| 2026-01-06 | David R Walt | Director | A | +1,215 | — |
| 2026-01-06 | Malcolm Garret Hampton | Director | A | +23,372 | — |
| 2026-01-06 | William P Donnelly | Executive Chair | A | +2,377 | — |
| 2026-01-06 | Goldman Myla Lai | Director | A | +25,316 | — |
| 2026-01-06 | Alan Bruce Sachs | Director | A | +23,372 | — |
| 2026-01-06 | Scott Mendel | Director | A | +25,316 | — |
| 2026-01-05 | Masoud Toloue | President & CEO | F | −258 | −$1.64K |
| 2025-12-18 | Masoud Toloue | President & CEO | F | −1,242 | −$9.20K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| David R Walt | Director | 1,872,890 | $5.30M |
| Masoud Toloue | President & CEO | 507,310 | $1.44M |
| Paul M Meister | Director | 313,253 | $886.51K |
| Martin D Madaus | Director | 291,541 | $825.06K |
| William P Donnelly | Executive Chair | 268,765 | $760.60K |
| Malcolm Garret Hampton | Director | 70,099 | $198.38K |
| Alan Bruce Sachs | Director | 70,099 | $198.38K |
| Sarah E. Hlavinka | Director | 60,070 | $170.00K |
| Karen Flynn | Director | 57,212 | $161.91K |
| Michael Francis Miller | Chief Technology Officer | 39,792 | $112.61K |
| Vandana Sriram | Chief Financial Officer | 31,283 | $88.53K |
| Scott Mendel | Director | 28,454 | $80.52K |
| Ivana Magovcevic-Liebisch | Director | 15,883 | $44.95K |
| Jeffrey Thomas Elliott | Director | 15,345 | $43.43K |
| Goldman Myla Lai | Director | 15,041 | $42.57K |
| Benjamin Meadows | Chief Commercial Officer | 3,500 | $9.90K |
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.
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.