QTRXNasdaqLaboratory Analytical InstrumentsFiscal year ends December 31
Quanterix Corp
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 10, 2026
$2.77−0.10 (-3.48%)
Close on Oct 19, 2026
- Market cap
- $130.65M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
68.1%
32M of 47M shares
Institutional holders
133
37 new, 31 sold out
Net institutional buying
-4M
In Q2 2026
Insider trades, 12 months
3 buys · 0 sales
Net bought $296.05K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Ameriprise Financial, Inc. | 3,542,374 | 7.50% | 13G (passive) amendment | Mar 31, 2026 |
| George McCabe | 2,945,823 | 6.25% | 13G (passive) amendment | Mar 31, 2026 |
| BlackRock, Inc. | 2,843,760 | 7.30% | 13G (passive) amendment | Jun 30, 2025 |
| First Eagle Investment Management, LLC | 2,753,165 | 5.80% | 13G (passive) | Jun 30, 2026 |
| Kent Lake PR LLC | 2,645,086 | 6.90% | 13D (active) amendment | Feb 28, 2025 |
| Telegraph Hill Partners III Investment Management, LLC | 2,504,648 | 5.40% | 13G (passive) | Sep 30, 2025 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of QTRX | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| First Eagle Investment Management, LLC | 5,506,330 | 11.64% | $23.79M | +4,206,243 | 0.02% |
| BlackRock, Inc. | 3,635,411 | 7.69% | $15.70M | +357,816 | 0.00% |
| Blue Water Life Science Advisors, LP | 3,474,202 | 7.35% | $15.01M | +1,332,055 | 9.45% |
| Portolan Capital Management, LLC | 1,899,308 | 4.02% | $8.21M | −1,046,515 | 0.31% |
| Vanguard Capital Management LLC | 1,800,644 | 3.81% | $7.78M | +16,031 | 0.00% |
| Lionhunter Capital Management, LLC | 1,500,427 | 3.17% | $6.48M | New | 2.92% |
| Aqr Capital Management LLC | 1,343,005 | 2.84% | $5.80M | +1,258,873 | 0.00% |
| Geode Capital Management, LLC | 1,131,377 | 2.39% | $4.89M | +136,613 | 0.00% |
| Ameriprise Financial Inc | 987,424 | 2.09% | $4.27M | −2,554,950 | 0.00% |
| Marshall Wace, Llp | 973,872 | 2.06% | $4.21M | +351,492 | 0.00% |
| State Street Corp | 932,307 | 1.97% | $4.03M | +34,030 | 0.00% |
| Tikvah Management LLC | 571,555 | 1.21% | $2.47M | −64 | 0.75% |
| Vanguard Portfolio Management LLC | 489,566 | 1.04% | $2.11M | −87,034 | 0.00% |
| Jacobs Levy Equity Management, Inc | 487,600 | 1.03% | $2.11M | New | 0.01% |
| Morgan Stanley | 447,688 | 0.95% | $1.93M | −160,168 | 0.00% |
| Jane Street Group, LLC | 419,050 | 0.89% | $1.81M | +263,395 | 0.00% |
| Gsa Capital Partners Llp | 410,252 | 0.87% | $1.77K | +314,724 | 0.11% |
| Tudor Investment Corp Et Al | 400,402 | 0.85% | $1.73M | +84,401 | 0.00% |
| Dimensional Fund Advisors LP | 397,833 | 0.84% | $1.72M | −45,285 | 0.00% |
| Northern Trust Corp | 337,227 | 0.71% | $1.46M | −12,431 | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 133 | 32M | 68.1% | 37 / 44 | 30 / 31 | 12M | 16M |
| Q1 2026 | 128 | 36M | 77.1% | 19 / 51 | 36 / 23 | 10M | 6M |
| Q4 2025 | 134 | 35M | 74.2% | 21 / 42 | 43 / 13 | 5M | 5M |
| Q3 2025 | 129 | 36M | 75.9% | 20 / 46 | 36 / 26 | 5M | 4M |
| Q2 2025 | 137 | 35M | 73.9% | 25 / 47 | 42 / 36 | 6M | 7M |
| Q1 2025 | 149 | 35M | 74.1% | 37 / 57 | 34 / 37 | 10M | 9M |
| Q4 2024 | 151 | 35M | 74.0% | 26 / 56 | 44 / 23 | 6M | 5M |
| Q3 2024 | 149 | 34M | 70.9% | 25 / 43 | 53 / 29 | 8M | 4M |
| Q2 2024 | 155 | 33M | 69.0% | 21 / 57 | 48 / 30 | 6M | 8M |
| Q1 2024 | 165 | 35M | 73.2% | 22 / 59 | 56 / 28 | 5M | 3M |
| Q4 2023 | 172 | 33M | 70.8% | 31 / 55 | 58 / 17 | 5M | 5M |
| Q3 2023 | 158 | 33M | 70.6% | 27 / 56 | 50 / 6 | 7M | 6M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of QTRX | Value | % of fund | As of |
|---|---|---|---|---|---|
| First Eagle Small Cap Opportunity Fund | 2,733,357 | 5.78% | $9.51M | 0.33% | Jul 31, 2026 |
| Strategic Advisers U.S. Total Stock Fund | 1,700,770 | 3.60% | $5.20M | 0.01% | May 31, 2026 |
| Vanguard Total Stock Market Index Fund | 1,254,850 | 2.65% | $5.42M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 1,124,040 | 2.38% | $4.86M | 0.01% | Jun 30, 2026 |
| Columbia Small Cap Value Discovery Fund | 689,236 | 1.46% | $2.40M | 0.10% | Jul 31, 2026 |
| Vanguard Extended Market Index Fund | 482,359 | 1.02% | $2.08M | 0.00% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 464,940 | 0.98% | $1.62M | 0.00% | Jul 31, 2026 |
| iShares Russell 2000 Value ETF | 392,069 | 0.83% | $1.69M | 0.01% | Jun 30, 2026 |
| iShares Biotechnology ETF | 280,438 | 0.59% | $1.21M | 0.01% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 231,225 | 0.49% | $707.55K | 0.00% | May 31, 2026 |
| Vanguard Russell 2000 Index Fund | 212,946 | 0.45% | $651.61K | 0.00% | May 31, 2026 |
| Schwab U.S. Small-Cap ETF | 206,512 | 0.44% | $631.93K | 0.00% | May 31, 2026 |
| Fidelity Enhanced Small Cap Core ETF | 200,221 | 0.42% | $864.95K | 0.01% | Jun 30, 2026 |
| U.S. Micro Cap Portfolio | 159,063 | 0.34% | $553.54K | 0.01% | Jul 31, 2026 |
| College Retirement Equities Fund - Total Global Stock Account | 149,880 | 0.32% | $647.48K | 0.00% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Everett Cunningham | President and CEO, Director | – | – | Jan 21, 2026 |
| Masoud Toloue | President & CEO, Director | 507,310 | 1.07% | Jan 20, 2026 |
| James Edward Gute Jr. | Chief Commercial Officer | – | – | Sep 17, 2026 |
| Michael Francis Miller | Chief Technology Officer | 37,417 | 0.08% | Sep 16, 2026 |
| Jason F. Faessler | Chief Financial Officer | – | – | Jul 16, 2026 |
| Vandana Sriram | Chief Financial Officer | 31,598 | 0.07% | Jun 23, 2026 |
| Benjamin Meadows | Chief Commercial Officer | 3,500 | 0.01% | Jun 12, 2026 |
| Daniel Char | Chief Legal Officer | – | – | Mar 24, 2026 |
| Jeffrey Thomas Elliott | Director | 15,345 | 0.03% | Aug 20, 2026 |
| William P. Donnelly | Director | 261,801 | 0.55% | Aug 19, 2026 |
| Goldman Myla Lai | Director | 15,041 | 0.03% | Jul 9, 2026 |
| Scott Mendel | Director | 24,056 | 0.05% | Jul 9, 2026 |
| Paul M. Meister | Director | 313,253 | 0.66% | Jan 15, 2026 |
| Ivana Magovcevic-Liebisch | Director | 43,607 | 0.09% | Jan 15, 2026 |
| Alan Bruce Sachs | Director | 70,099 | 0.15% | Jan 6, 2026 |
| David R. Walt | Director | 1,872,890 | 3.96% | Jan 6, 2026 |
| Karen Flynn | Director | 57,212 | 0.12% | Jan 6, 2026 |
| Malcolm Garret Hampton | Director | 70,099 | 0.15% | Jan 6, 2026 |
| Sarah E. Hlavinka | Director | 60,070 | 0.13% | Jul 3, 2025 |
| Martin D. Madaus | Director | 291,541 | 0.62% | Jan 6, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Tax withholding | −25 | $2.72 | $68 | 37,417 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Option exercise | +81 | – | – | 37,442 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Tax withholding | −249 | $2.72 | $677 | 38,452 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Option exercise | +136 | – | – | 37,553 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Tax withholding | −41 | $2.72 | $112 | 37,512 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Option exercise | +135 | – | – | 37,647 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Tax withholding | −41 | $2.72 | $112 | 37,606 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Option exercise | +372 | – | – | 37,978 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Option exercise | +834 | – | – | 38,701 |
| Michael Francis Miller Chief Technology Officer | Sep 15, 2026 | Tax withholding | −111 | $2.72 | $302 | 37,867 |
| Michael Francis Miller Chief Technology Officer | Aug 31, 2026 | Option exercise | +159 | – | – | 37,409 |
| Michael Francis Miller Chief Technology Officer | Aug 31, 2026 | Tax withholding | −48 | $2.67 | $128 | 37,361 |
| Jeffrey Thomas Elliott Director | Aug 19, 2026 | Option exercise | +3,955 | – | – | 15,345 |
| William P. Donnelly Director | Aug 17, 2026 | Option exercise | +2,802 | – | – | 162,401 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Tax withholding | −249 | $2.59 | $645 | 37,250 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Option exercise | +834 | – | – | 37,499 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Tax withholding | −111 | $2.59 | $287 | 36,665 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Option exercise | +372 | – | – | 36,776 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Tax withholding | −41 | $2.59 | $106 | 36,404 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Option exercise | +135 | – | – | 36,445 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Tax withholding | −41 | $2.59 | $106 | 36,310 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Option exercise | +136 | – | – | 36,351 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Tax withholding | −25 | $2.59 | $65 | 36,215 |
| Michael Francis Miller Chief Technology Officer | Aug 15, 2026 | Option exercise | +81 | – | – | 36,240 |
| William P. Donnelly Director | Aug 13, 2026 | Buy | +72,245 | $2.93 | $211.68K | 99,400 |
| William P. Donnelly Director | Aug 12, 2026 | Buy | +27,155 | $2.75 | $74.68K | 27,155 |
| Michael Francis Miller Chief Technology Officer | Jul 31, 2026 | Option exercise | +130 | – | – | 36,198 |
| Michael Francis Miller Chief Technology Officer | Jul 31, 2026 | Tax withholding | −39 | $3.48 | $136 | 36,159 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Option exercise | +135 | – | – | 35,263 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Tax withholding | −41 | $4.24 | $174 | 35,128 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Tax withholding | −249 | $4.24 | $1.06K | 36,068 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Tax withholding | −25 | $4.24 | $106 | 35,033 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Option exercise | +81 | – | – | 35,058 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Tax withholding | −41 | $4.24 | $174 | 35,222 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Option exercise | +372 | – | – | 35,594 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Tax withholding | −111 | $4.24 | $471 | 35,483 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Option exercise | +834 | – | – | 36,317 |
| Michael Francis Miller Chief Technology Officer | Jul 15, 2026 | Option exercise | +136 | – | – | 35,169 |
| Goldman Myla Lai Director | Jul 8, 2026 | Option exercise | +8,073 | – | – | 15,041 |
| Scott Mendel Director | Jul 8, 2026 | Option exercise | +8,073 | – | – | 24,056 |
| Scott Mendel Director | Jul 1, 2026 | Award | +3,456 | $4.34 | $15.00K | 16,837 |
| William P. Donnelly Director | Jul 1, 2026 | Award | +5,472 | $4.34 | $23.75K | 160,305 |
| Michael Francis Miller Chief Technology Officer | Jun 30, 2026 | Tax withholding | −39 | $4.32 | $168 | 34,977 |
| Michael Francis Miller Chief Technology Officer | Jun 30, 2026 | Option exercise | +130 | – | – | 35,016 |
| Vandana Sriram Chief Financial Officer | Jun 15, 2026 | Option exercise | +1,056 | – | – | 31,598 |
| Vandana Sriram Chief Financial Officer | Jun 15, 2026 | Tax withholding | −154 | $3.10 | $477 | 30,542 |
| Vandana Sriram Chief Financial Officer | Jun 15, 2026 | Option exercise | +514 | – | – | 30,696 |
| Vandana Sriram Chief Financial Officer | Jun 15, 2026 | Tax withholding | −79 | $3.10 | $245 | 30,182 |
| Vandana Sriram Chief Financial Officer | Jun 15, 2026 | Option exercise | +263 | – | – | 30,261 |
| Vandana Sriram Chief Financial Officer | Jun 15, 2026 | Tax withholding | −315 | $3.10 | $977 | 31,283 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Tax withholding | −25 | $3.10 | $78 | 33,851 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Option exercise | +81 | – | – | 33,876 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Tax withholding | −41 | $3.10 | $127 | 34,040 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Option exercise | +372 | – | – | 34,412 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Tax withholding | −111 | $3.10 | $344 | 34,301 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Option exercise | +136 | – | – | 33,987 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Tax withholding | −41 | $3.10 | $127 | 33,946 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Option exercise | +135 | – | – | 34,081 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Tax withholding | −249 | $3.10 | $772 | 34,886 |
| Michael Francis Miller Chief Technology Officer | Jun 15, 2026 | Option exercise | +834 | – | – | 35,135 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Olson Laurie Director | Jun 12, 2024 | 20,915 | $378.14K | Jun 12, 2024 | Restricted Stock |
| Olson Laurie Director | Apr 1, 2024 | 1,000 | $23.50K | Apr 1, 2024 | Stock Option Exercise |
| Olson Laurie Director | Feb 14, 2024 | 1,500 | $36.53K | Feb 14, 2024 | Restricted Stock |
| Olson Laurie Director | Jan 2, 2024 | 1,000 | $26.91K | Jan 2, 2024 | Stock Option Exercise |