| $350M | ||
| $217M | ||
| $172M | ||
| $109M | ||
| $107M | ||
| $104M |
Buys | $296,049 | 3 | 100 |
Sells | $0 | 0 | 0 |
| DONNELLY WILLIAM P | director | 2 | $286,354 | 0 | $0 | $286,354 |
| Meadows Benjamin | Chief Commercial Officer | 1 | $9,695 | 0 | $0 | $9,695 |
Quanterix Corporation, based in Billerica, Massachusetts, is a life sciences enterprise dedicated to pioneering and commercializing advanced digital immunoassay platforms. These sophisticated systems are designed to enhance precision health in both scientific research and diagnostic applications, reaching markets across North America, Europe, the Middle East, Africa, and the Asia Pacific regions. The company's core offerings include several innovative instruments: The HD-X instrument, which provides highly sensitive and automated multiplex …
Over the last 12 months, insiders at Quanterix Corporation have bought $296,049 and sold $0 worth of Quanterix Corporation stock.
On average, over the past 5 years, insiders at Quanterix Corporation have bought $1.66M and sold $1.04M worth of stock each year.
Highest buying activity among insiders over the last 12 months: DONNELLY WILLIAM P (director) — $286,354. Meadows Benjamin (Chief Commercial Officer) — $9,695.
The last purchase of 72,245 shares for transaction amount of $211,678 was made by DONNELLY WILLIAM P (director) on 2026‑08‑13.
| 2026-08-13 | DONNELLY WILLIAM P | director | 72,245 0.1571% | $2.93 | $211,678 | +1.75% | ||
| 2026-08-12 | DONNELLY WILLIAM P | director | 27,155 0.0541% | $2.75 | $74,676 | -0.77% | ||
| 2026-05-12 | Meadows Benjamin | Chief Commercial Officer | 3,500 0.0071% | $2.77 | $9,695 | +7.22% | ||
| 2025-09-12 | Sriram Vandana | Chief Financial Officer | 4,150 0.0089% | $4.79 | $19,879 | -1.87% | ||
| 2025-06-13 | WALT DAVID R | director | 123,990 0.3233% | $6.14 | $760,803 | -9.08% | ||
| 2025-06-12 | WALT DAVID R | director | 36,010 0.0933% | $6.23 | $224,166 | -10.99% | ||
| 2025-06-09 | WALT DAVID R | director | 78,131 0.2124% | $5.34 | $417,220 | +10.28% | ||
| 2025-06-09 | Toloue Masoud | President & CEO | 45,900 0.1266% | $5.42 | $248,723 | +10.28% | ||
| 2025-06-06 | WALT DAVID R | director | 131,869 0.3437% | $5.43 | $716,576 | +4.19% | ||
| 2025-06-06 | DONNELLY WILLIAM P | director | 93,113 0.2428% | $5.44 | $506,348 | +4.19% | ||
| 2024-08-20 | WALT DAVID R | director | 47,000 0.1231% | $13.29 | $624,630 | -40.92% | ||
| 2024-08-13 | Toloue Masoud | President & CEO | 19,000 0.0485% | $10.90 | $207,100 | -27.92% | ||
| 2024-05-14 | Sale | OLSON LAURIE J | director | 1,500 0.004% | $16.98 | $25,470 | -29.19% | |
| 2024-04-01 | Sale | OLSON LAURIE J | director | 1,000 0.0026% | $23.50 | $23,500 | -47.35% | |
| 2024-02-14 | Sale | OLSON LAURIE J | director | 1,500 0.004% | $24.35 | $36,525 | -46.35% | |
| 2024-01-02 | Sale | OLSON LAURIE J | director | 1,000 0.0026% | $26.91 | $26,910 | -45.06% | |
| 2023-09-08 | DONNELLY WILLIAM P | director | 20,200 0.0545% | $24.85 | $501,978 | -11.27% | ||
| 2022-08-12 | Toloue Masoud | President & CEO | 105,000 0.2829% | $10.43 | $1.1M | +23.14% | ||
| 2022-08-12 | DOYLE MICHAEL A | CFO and Treasurer | 15,000 0.0394% | $10.16 | $152,418 | +23.14% | ||
| 2022-08-11 | Hlavinka Sarah E. | 4,760 0.0132% | $10.46 | $49,788 | +26.57% |
| DONNELLY WILLIAM P | director | 99400 0.2102% | $292,236.00 | 4 | 0 | <0.0001% |
| Meadows Benjamin | Chief Commercial Officer | 3500 0.0074% | $10,290.00 | 1 | 0 | |
| WALT DAVID R | director | 1866933 3.9476% | $5.49M | 8 | 0 | +12.56% |
| CRANDELL KEITH | 1537684 3.2514% | $4.52M | 1 | 1 | <0.0001% | |
| ARCH VENTURE FUND VI LP | 10 percent owner | 1537684 3.2514% | $4.52M | 1 | 0 | <0.0001% |
| HRUSOVSKY E KEVIN | Executive Chairman | 910249 1.9247% | $2.68M | 1 | 103 | <0.0001% |
| Toloue Masoud | President & CEO | 518922 1.0972% | $1.53M | 3 | 3 | +1.83% |
| Madaus Martin D | 254633 0.5384% | $748,621.02 | 1 | 52 | +50% | |
| MEISTER PAUL M | 252611 0.5341% | $742,676.34 | 1 | 0 | +50% | |
| Sriram Vandana | Chief Financial Officer | 87200 0.1844% | $256,368.00 | 1 | 0 | <0.0001% |
| DOYLE MICHAEL A | CFO and Treasurer | 48614 0.1028% | $142,925.16 | 1 | 1 | +23.14% |
| Hlavinka Sarah E. | 26270 0.0555% | $77,233.80 | 1 | 0 | +26.57% | |
| Connolly John M | director | 4970 0.0105% | $14,611.80 | 1 | 0 | +26.86% |
| DEKKERS MARIJN E | director | 2270 0.0048% | $6,673.80 | 1 | 5 | <0.0001% |
| Increased Positions | 63 | +42.86% | 5M | +14.64% |
| Decreased Positions | 59 | -40.14% | 6M | -15.65% |
| New Positions | 20 | New | 1M | New |
| Sold Out Positions | 15 | Sold Out | 159,331 | Sold Out |
| Total Postitions | 151 | +2.72% | 37M | -1.01% |
| Portolan Capital Management, Llc | $27,391.00 | 9.06% | 4.26M | +626,229 | +17.23% | 2025-09-30 |
| Ameriprise Financial Inc | $27,286.00 | 9.03% | 4.24M | +6,635 | +0.16% | 2025-09-30 |
| Blackrock, Inc. | $20,016.00 | 6.62% | 3.11M | -311,229 | -9.09% | 2025-09-30 |
| Vanguard Group Inc | $17,024.00 | 5.63% | 2.65M | -1M | -28.89% | 2025-09-30 |
| Invenomic Capital Management Lp | $8,957.00 | 2.96% | 1.39M | +248,101 | +21.67% | 2025-09-30 |
| William Blair Investment Management, Llc | $8,457.00 | 2.8% | 1.32M | +187,299 | +16.61% | 2025-09-30 |
| Easterly Investment Partners Llc | $8,052.00 | 2.66% | 1.25M | +168,549 | +15.55% | 2025-09-30 |
| Millennium Management Llc | $7,775.00 | 2.57% | 1.21M | +1M | +1,066.14% | 2025-09-30 |
| Geode Capital Management, Llc | $6,506.00 | 2.15% | 1.01M | -120,855 | -10.67% | 2025-09-30 |
| Kent Lake Pr Llc | $6,436.00 | 2.13% | 1M | -1M | -56.5% | 2025-09-30 |