Quanterix Corp
QTRX · Laboratory Analytical Instruments · 47.1M shares · +11%/yr ↑ dilution · EDGAR filings ↗
Reference price $2.77 · est. market cap ~$130M — last insider purchase, 2026-05-12 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
D44Ultra-sensitive biomarker-tools company (Simoa) with deep losses and cash burn, funded.
Strengths
- Strong liquidity — current ratio 2.8 (47th)
Risks
- Deep losses — operating margin -90%, net margin -77%
- Cash burn — FCF -$80M
- Tools-demand softness/integration — per 10-K
Notable findings
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Chronic dilutionShare count +11%/yr over 4y (dilution, book value/share -55%)
- Cash burnNegative free cash flow (-79.8M)
- Exec changeRecent 8-K item 5.02 8-K ↗
- Net lossNet loss (net margin -77.1%)
- Revenue declineRevenue -17.0% YoY
- Notable holderHeld by 5 notable fund(s): STATE STREET CORP, GOLDMAN SACHS GROUP INC, FMR LLC +2 more (as of 2026-03-31)
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Gross margin
46.8%
Operating margin
-90.4%
Net margin
-77.1%
Return on equity
-36.2%
Return on assets
-25.6%
Revenue growth (QoQ)
-17.0%
Current ratio
2.8×
Free cash flow
-$80M
EBITDA
-$110M
Tangible book value
$138M
Cash & investments
$118M
Cash runway
6q
Stock comp / revenue
14.9%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-15 | Sriram Vandana | Option exercise | 514 | — |
| 2026-06-15 | Sriram Vandana | Tax withheld | 154 | $3.10 |
| 2026-06-15 | Sriram Vandana | Option exercise | 263 | — |
| 2026-06-15 | Sriram Vandana | Option exercise | 1.1K | — |
| 2026-06-15 | Sriram Vandana | Tax withheld | 315 | $3.10 |
| 2026-06-15 | Miller Michael Francis | Option exercise | 81 | — |
| 2026-06-15 | Miller Michael Francis | Tax withheld | 25 | $3.10 |
| 2026-06-15 | Miller Michael Francis | Option exercise | 136 | — |
| 2026-06-15 | Miller Michael Francis | Tax withheld | 41 | $3.10 |
| 2026-06-15 | Miller Michael Francis | Option exercise | 135 | — |
| 2026-06-15 | Miller Michael Francis | Tax withheld | 41 | $3.10 |
| 2026-06-15 | Miller Michael Francis | Option exercise | 372 | — |
| 2026-06-15 | Miller Michael Francis | Tax withheld | 111 | $3.10 |
| 2026-06-15 | Miller Michael Francis | Option exercise | 834 | — |
| 2026-06-15 | Sriram Vandana | Tax withheld | 79 | $3.10 |
| 2026-06-15 | Miller Michael Francis | Tax withheld | 249 | $3.10 |
| 2026-05-31 | Miller Michael Francis | Tax withheld | 39 | $3.06 |
| 2026-05-31 | Miller Michael Francis | Option exercise | 130 | — |
| 2026-05-15 | Sriram Vandana | Tax withheld | 315 | $2.75 |
| 2026-05-15 | Miller Michael Francis | Option exercise | 81 | — |
| 2026-05-15 | Miller Michael Francis | Tax withheld | 25 | $2.75 |
| 2026-05-15 | Miller Michael Francis | Option exercise | 136 | — |
| 2026-05-15 | Miller Michael Francis | Tax withheld | 41 | $2.75 |
| 2026-05-15 | Miller Michael Francis | Option exercise | 135 | — |
| 2026-05-15 | Miller Michael Francis | Tax withheld | 41 | $2.75 |
| 2026-05-15 | Miller Michael Francis | Option exercise | 372 | — |
| 2026-05-15 | Miller Michael Francis | Tax withheld | 111 | $2.75 |
| 2026-05-15 | Miller Michael Francis | Option exercise | 834 | — |
| 2026-05-15 | Miller Michael Francis | Tax withheld | 249 | $2.75 |
| 2026-05-15 | Sriram Vandana | Option exercise | 263 | — |
| 2026-05-15 | Sriram Vandana | Tax withheld | 79 | $2.75 |
| 2026-05-15 | Sriram Vandana | Option exercise | 514 | — |
| 2026-05-15 | Sriram Vandana | Tax withheld | 154 | $2.75 |
| 2026-05-15 | Sriram Vandana | Option exercise | 1.1K | — |
| 2026-05-12 | Meadows Benjamin | Buy | 3.5K | $2.77 |
| 2026-04-30 | Miller Michael Francis | Option exercise | 130 | — |
| 2026-04-30 | Miller Michael Francis | Tax withheld | 39 | $3.13 |
| 2026-04-15 | Sriram Vandana | Option exercise | 1.1K | — |
| 2026-04-15 | Miller Michael Francis | Option exercise | 81 | — |
| 2026-04-15 | Miller Michael Francis | Tax withheld | 25 | $3.60 |
| 2026-04-15 | Miller Michael Francis | Option exercise | 136 | — |
| 2026-04-15 | Miller Michael Francis | Tax withheld | 41 | $3.60 |
| 2026-04-15 | Miller Michael Francis | Option exercise | 135 | — |
| 2026-04-15 | Miller Michael Francis | Tax withheld | 41 | $3.60 |
| 2026-04-15 | Miller Michael Francis | Option exercise | 372 | — |
| 2026-04-15 | Miller Michael Francis | Tax withheld | 111 | $3.60 |
| 2026-04-15 | Miller Michael Francis | Option exercise | 834 | — |
| 2026-04-15 | Miller Michael Francis | Tax withheld | 249 | $3.60 |
| 2026-04-15 | Sriram Vandana | Option exercise | 263 | — |
| 2026-04-15 | Sriram Vandana | Tax withheld | 79 | $3.60 |
| 2026-04-15 | Sriram Vandana | Option exercise | 514 | — |
| 2026-04-15 | Sriram Vandana | Tax withheld | 154 | $3.60 |
| 2026-04-15 | Sriram Vandana | Tax withheld | 315 | $3.60 |
| 2026-04-01 | Mendel Scott | Grant | 4.3K | — |
| 2026-04-01 | DONNELLY WILLIAM P | Grant | 6.2K | — |
| 2026-03-31 | Miller Michael Francis | Option exercise | 99 | — |
| 2026-03-31 | Miller Michael Francis | Tax withheld | 30 | $3.52 |
| 2026-03-31 | Miller Michael Francis | Option exercise | 130 | — |
| 2026-03-31 | Miller Michael Francis | Tax withheld | 39 | $3.52 |
| 2026-03-15 | Miller Michael Francis | Option exercise | 81 | — |
| 2026-03-15 | Miller Michael Francis | Tax withheld | 29 | $4.72 |
| 2026-03-15 | Miller Michael Francis | Option exercise | 136 | — |
| 2026-03-15 | Miller Michael Francis | Tax withheld | 48 | $4.72 |
| 2026-03-15 | Miller Michael Francis | Option exercise | 135 | — |
| 2026-03-15 | Miller Michael Francis | Tax withheld | 48 | $4.72 |
| 2026-03-15 | Miller Michael Francis | Option exercise | 372 | — |
| 2026-03-15 | Miller Michael Francis | Tax withheld | 131 | $4.72 |
| 2026-03-15 | Miller Michael Francis | Option exercise | 834 | — |
| 2026-03-15 | Miller Michael Francis | Tax withheld | 293 | $4.72 |
| 2026-03-15 | Sriram Vandana | Option exercise | 263 | — |
| 2026-03-15 | Sriram Vandana | Tax withheld | 93 | $4.72 |
| 2026-03-15 | Sriram Vandana | Option exercise | 514 | — |
| 2026-03-15 | Sriram Vandana | Tax withheld | 181 | $4.72 |
| 2026-03-15 | Sriram Vandana | Option exercise | 1.1K | — |
| 2026-03-15 | Sriram Vandana | Tax withheld | 371 | $4.72 |
| 2026-02-15 | Sriram Vandana | Option exercise | 514 | — |
| 2026-02-15 | Sriram Vandana | Tax withheld | 179 | $5.74 |
| 2026-02-15 | Sriram Vandana | Option exercise | 263 | — |
| 2026-02-15 | Sriram Vandana | Tax withheld | 92 | $5.74 |
| 2026-02-04 | Sriram Vandana | Tax withheld | 4.4K | — |
| 2026-01-15 | Sriram Vandana | Tax withheld | 274 | $7.95 |
| 2026-01-15 | Toloue Masoud | Tax withheld | 1.8K | $7.95 |
| 2026-01-02 | Sachs Alan Bruce | Grant | 23K | — |
| 2026-01-02 | Magovcevic-Liebisch Ivana | Grant | 23K | — |
| 2026-01-02 | MEISTER PAUL M | Grant | 4.0K | — |
| 2026-01-02 | Elliott Jeffrey Thomas | Grant | 23K | — |
| 2026-01-02 | Hampton Malcolm Garret | Grant | 23K | — |
| 2026-01-02 | Flynn Karen | Grant | 23K | — |
| 2026-01-02 | Mendel Scott | Grant | 23K | — |
| 2026-01-02 | Mendel Scott | Grant | 1.9K | — |
| 2026-01-02 | DONNELLY WILLIAM P | Grant | 2.4K | — |
| 2026-01-02 | WALT DAVID R | Grant | 1.2K | — |
| 2026-01-02 | LAI GOLDMAN MYLA | Grant | 23K | — |
| 2026-01-02 | LAI GOLDMAN MYLA | Grant | 1.9K | — |
| 2025-12-31 | Toloue Masoud | Tax withheld | 258 | $6.36 |
| 2025-12-15 | Sriram Vandana | Tax withheld | 229 | $7.41 |
| 2025-12-15 | Toloue Masoud | Tax withheld | 1.2K | $7.41 |
| 2025-11-30 | Toloue Masoud | Tax withheld | 254 | $7.26 |
| 2025-11-20 | Sachs Alan Bruce | Grant | 47K | — |
| 2025-11-20 | Hampton Malcolm Garret | Grant | 47K | — |
| 2025-11-15 | Sriram Vandana | Tax withheld | 229 | $5.78 |
| 2025-11-15 | Toloue Masoud | Tax withheld | 1.2K | $5.74 |
| 2025-10-31 | Toloue Masoud | Tax withheld | 254 | $5.34 |
| 2025-10-15 | Sriram Vandana | Tax withheld | 229 | $5.78 |
| 2025-10-15 | Toloue Masoud | Tax withheld | 1.2K | $5.78 |
| 2025-10-01 | Mendel Scott | Grant | 2.1K | $5.54 |
| 2025-10-01 | DONNELLY WILLIAM P | Grant | 5.1K | $5.54 |
| 2025-10-01 | WALT DAVID R | Grant | 2.6K | $5.54 |
| 2025-10-01 | LAI GOLDMAN MYLA | Grant | 2.1K | $5.54 |
| 2025-09-30 | Toloue Masoud | Tax withheld | 254 | $5.43 |
| 2025-09-15 | Sriram Vandana | Tax withheld | 229 | $4.97 |
| 2025-09-15 | Toloue Masoud | Tax withheld | 1.2K | $4.97 |
| 2025-09-12 | Sriram Vandana | Buy | 4.2K | $4.79 |
| 2025-08-31 | Toloue Masoud | Tax withheld | 254 | $4.55 |
| 2025-08-15 | Sriram Vandana | Tax withheld | 229 | $4.57 |
| 2025-08-15 | Toloue Masoud | Tax withheld | 1.2K | $4.57 |
| 2025-07-31 | Toloue Masoud | Tax withheld | 254 | $5.94 |
| 2025-07-15 | Sriram Vandana | Tax withheld | 229 | $5.49 |
| 2025-07-15 | Toloue Masoud | Tax withheld | 1.2K | $5.49 |
| 2025-07-08 | LAI GOLDMAN MYLA | Grant | 2.9K | — |
| 2025-07-08 | LAI GOLDMAN MYLA | Grant | 24K | — |
| 2025-07-08 | Mendel Scott | Grant | 4.2K | — |
| 2025-07-08 | Mendel Scott | Grant | 24K | — |
| 2025-07-01 | Hlavinka Sarah E. | Grant | 2.6K | $6.69 |
| 2025-07-01 | MEISTER PAUL M | Grant | 2.2K | $6.69 |
| 2025-07-01 | DONNELLY WILLIAM P | Grant | 4.2K | $6.69 |
| 2025-07-01 | WALT DAVID R | Grant | 2.1K | $6.69 |
| 2025-06-30 | Toloue Masoud | Tax withheld | 254 | $6.65 |
| 2025-06-15 | Toloue Masoud | Tax withheld | 1.2K | $6.06 |
| 2025-06-15 | Sriram Vandana | Tax withheld | 229 | $6.06 |
| 2025-06-13 | WALT DAVID R | Buy | 124K | $6.14 |
| 2025-06-12 | WALT DAVID R | Buy | 36K | $6.23 |
| 2025-06-09 | Toloue Masoud | Buy | 46K | $5.42 |
| 2025-06-09 | WALT DAVID R | Buy | 78K | $5.34 |
| 2025-06-06 | WALT DAVID R | Buy | 132K | $5.43 |
| 2025-06-06 | DONNELLY WILLIAM P | Buy | 93K | $5.44 |
| 2025-05-31 | Toloue Masoud | Tax withheld | 254 | $5.20 |
| 2025-05-15 | Sriram Vandana | Tax withheld | 229 | $4.50 |
| 2025-05-15 | Toloue Masoud | Tax withheld | 1.2K | $4.50 |
| 2025-04-30 | Toloue Masoud | Tax withheld | 254 | $5.76 |
| 2025-04-15 | Sriram Vandana | Tax withheld | 229 | $5.36 |
| 2025-04-15 | Toloue Masoud | Tax withheld | 1.2K | $5.16 |
| 2025-04-01 | WALT DAVID R | Grant | 2.2K | $6.67 |
| 2025-04-01 | MEISTER PAUL M | Grant | 2.5K | $6.67 |
| 2025-04-01 | Hlavinka Sarah E. | Grant | 2.6K | $6.67 |
| 2025-04-01 | DONNELLY WILLIAM P | Grant | 2.7K | $6.67 |
| 2025-03-31 | Toloue Masoud | Tax withheld | 254 | $6.51 |
| 2025-03-15 | Toloue Masoud | Tax withheld | 1.2K | $7.06 |
| 2025-03-15 | Sriram Vandana | Tax withheld | 229 | $7.06 |
| 2025-02-28 | Toloue Masoud | Tax withheld | 247 | $7.59 |
| 2025-02-15 | Sriram Vandana | Tax withheld | 92 | $8.05 |
| 2025-02-15 | Toloue Masoud | Tax withheld | 752 | $8.05 |
| 2025-02-04 | Sriram Vandana | Grant | 51K | — |
| 2025-02-04 | Toloue Masoud | Grant | 139K | — |
| 2025-02-02 | Toloue Masoud | Tax withheld | 6.1K | $9.19 |
| 2025-02-02 | Sriram Vandana | Tax withheld | 2.2K | $9.19 |
| 2025-01-31 | Toloue Masoud | Tax withheld | 298 | $9.19 |
| 2025-01-15 | Sriram Vandana | Tax withheld | 93 | $8.62 |
| 2025-01-15 | Toloue Masoud | Tax withheld | 906 | $8.62 |
| 2025-01-02 | MEISTER PAUL M | Grant | 7.4K | — |
| 2025-01-02 | MEISTER PAUL M | Grant | 1.4K | $10.76 |
| 2025-01-02 | Hlavinka Sarah E. | Grant | 7.4K | — |
| 2025-01-02 | Hlavinka Sarah E. | Grant | 1.4K | $10.76 |
| 2025-01-02 | DONNELLY WILLIAM P | Grant | 7.4K | — |
| 2025-01-02 | DONNELLY WILLIAM P | Grant | 1.3K | $10.76 |
| 2025-01-02 | Elliott Jeffrey Thomas | Grant | 7.4K | — |
| 2025-01-02 | WALT DAVID R | Grant | 7.4K | — |
| 2025-01-02 | Magovcevic-Liebisch Ivana | Grant | 7.4K | — |
| 2025-01-02 | Madaus Martin D | Grant | 7.4K | — |
| 2025-01-02 | Flynn Karen | Grant | 7.4K | — |
| 2024-12-31 | Toloue Masoud | Tax withheld | 415 | $10.63 |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
| Date | Items | |
|---|---|---|
| 2026-06-10 | Shareholder vote | filing ↗ |
| 2026-06-09 | Exec/director changeReg FDExhibits | filing ↗ |
| 2026-05-26 | Exec/director changeExhibits | filing ↗ |
| 2026-05-12 | Exec/director changeReg FDExhibits | filing ↗ |
| 2026-05-06 | ResultsReg FDExhibits | filing ↗ |
| 2026-03-02 | ResultsExhibits | filing ↗ |
| 2026-01-08 | ResultsExec/director changeReg FDExhibits | filing ↗ |
| 2025-11-20 | Exec/director changeReg FDExhibits | filing ↗ |
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-06-10 | 2026-06-09 | 0001503274-26-000028 ↗ |
| 8-K | 2026-06-09 | 2026-06-09 | 0001628280-26-041773 ↗ |
| 8-K | 2026-05-26 | 2026-05-14 | 0001503274-26-000024 ↗ |
| 8-K | 2026-05-12 | 2026-05-11 | 0001628280-26-034124 ↗ |
| 10-Q | 2026-05-06 | 2026-03-31 | 0001503274-26-000021 ↗ |
| 8-K | 2026-05-06 | 2026-05-06 | 0001503274-26-000019 ↗ |
| 10-K | 2026-03-02 | 2025-12-31 | 0001503274-26-000013 ↗ |
| 8-K | 2026-03-02 | 2026-03-02 | 0001503274-26-000011 ↗ |
| 8-K | 2026-01-08 | 2026-01-08 | 0001628280-26-001369 ↗ |
| 8-K | 2025-11-20 | 2025-11-20 | 0001628280-25-053420 ↗ |
| 10-Q | 2025-11-10 | 2025-09-30 | 0001503274-25-000106 ↗ |
| 8-K | 2025-11-10 | 2025-11-10 | 0001503274-25-000104 ↗ |