Quanterix Ownership | Who Owns Quanterix?
Quanterix Ownership Summary
Quanterix is owned by 44.18% institutional investors, 6.18% insiders, and 49.64% retail investors. Portolan capital management is the largest institutional shareholder, holding 10.95% of QTRX shares. Strategic Advisers U.S. Total Stock{mg} is the top mutual fund, with 3.79% of its assets in Quanterix shares.
QTRX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Quanterix | 44.18% | 6.18% | 49.64% |
| Sector | Healthcare Stocks | 232.86% | 10.65% | -143.51% |
| Industry | Medical Device Stocks | 37.83% | 10.48% | 51.69% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Portolan capital management | 4.26M | 10.95% | $23.13M |
| Ameriprise financial | 4.24M | 10.91% | $23.04B |
| Blackrock | 3.14M | 8.23% | $41.45M |
| Blackrock funding, inc. /de | 3.38M | 7.33% | $21.47M |
| Vanguard group | 2.68M | 5.81% | $17.03M |
| William blair investment management | 2.08M | 4.45% | $7.33M |
| Invenomic capital management lp | 1.39M | 3.58% | $7.56M |
| Kent lake pr | 1.00M | 2.57% | $5.44M |
| Blue water life science advisors, lp | 957.75K | 2.46% | $5.20M |
| Geode capital management | 1.07M | 2.33% | $6.83M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Blue water life science advisors, lp | 957.75K | 4.74% | $5.20M |
| Kent lake pr | 1.00M | 2.75% | $5.44M |
| Trium capital llp | 994.22K | 2.46% | $3.50M |
| Ashford capital management | 771.30K | 1.38% | $10.19M |
| Portolan capital management | 4.26M | 1.25% | $23.13M |
| Tikvah management | 571.62K | 0.92% | $3.10M |
| Empire financial management company | 617.83K | 0.85% | $3.93M |
| Ironwood investment management | 172.33K | 0.46% | $1.10M |
| Kent lake capital | 75.00K | 0.45% | $990.75K |
| Invenomic capital management lp | 1.39M | 0.37% | $7.56M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Balyasny asset management | 767.80K | 0.01% | 723.29K |
| Portolan capital management | 4.26M | 1.25% | 626.23K |
| First eagle investment management | 531.43K | 0.01% | 531.43K |
| Envestnet asset management | 682.71K | 0.00% | 430.50K |
| Russell investments group | 641.98K | 0.00% | 385.84K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Millennium management | 55.71K | 0.00% | -2.13M |
| Lord, abbett | - | - | -1.76M |
| Kent lake pr | 1.00M | 2.75% | -1.30M |
| Pier capital | - | - | -848.35K |
| Easterly investment partners | - | - | -616.68K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| First eagle investment management | 531.43K | 0.01% | 531.43K | $3.38M |
| Vanguard fiduciary trust | 270.53K | 0.00% | 270.53K | $952.26K |
| Bridgeway capital management | 43.00K | 0.01% | 43.00K | $233.49K |
| Pharvision advisers | 36.14K | 0.11% | 36.14K | $196.26K |
| Atom investors lp | 19.57K | 0.01% | 19.57K | $106.27K |
Sold Out
| Holder | Change |
|---|---|
| Manchester capital management | -23.00 |
| Innealta capital | -26.00 |
| Ronald blue trust | -31.00 |
| National bank of canada /fi/ | -33.00 |
| Capital performance advisors llp | -34.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 91 | -30.00% | 20,350,001 | -42.95% | 44 | 0.53% | 44 | -34.33% | 27 | -25.00% |
| Sep 30, 2025 | 128 | -2.29% | 35,671,807 | 6.32% | 91 | 1.23% | 65 | -7.14% | 36 | -5.26% |
| Jun 30, 2025 | 135 | -10.60% | 34,762,673 | -0.84% | 89 | 1.09% | 70 | -23.91% | 41 | 17.14% |
| Mar 31, 2025 | 5 | -96.82% | 897,525 | -97.43% | 2 | 0.03% | 5 | -93.98% | - | -100.00% |
| Dec 31, 2024 | 156 | 3.31% | 34,445,404 | 3.64% | 89 | 1.20% | 83 | 20.29% | 43 | -17.31% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Strategic Advisers U.S. Total Stock{mg} | 1.45M | 3.79% | 91.44K |
| Strategic Advisers U.S. Total Stock | 1.61M | 3.41% | - |
| Strategic Advisers Small-Mid Cap | 1.30M | 3.39% | 283.56K |
| Vanguard US Total Market Shares ETF | 1.15M | 2.96% | - |
| CT (Lux) American Smaller Com 9U USD | 1.32M | 2.81% | -916.01K |
| Vanguard Total Stock Mkt Idx Inv | 1.25M | 2.67% | - |
| AB Small Cap Growth A | 1.26M | 2.53% | -30.56K |
| First Eagle US Small Cap Strategy | 1.13M | 2.41% | 669.11K |
| First Eagle Small Cap Opportunity I | 1.11M | 2.37% | 211.71K |
| iShares Russell 2000 ETF | 992.60K | 2.11% | 8.37K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 12, 2025 | Sriram Vandana | Chief Financial Officer | Buy | $19.88K |
| Jun 13, 2025 | WALT DAVID R | - | Buy | $760.80K |
| Jun 12, 2025 | WALT DAVID R | - | Buy | $224.17K |
| Jun 09, 2025 | Toloue Masoud | President & CEO | Buy | $248.72K |
| Jun 06, 2025 | WALT DAVID R | - | Buy | $716.58K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | - |
| 2026 Q1 | - | - |
| 2025 Q4 | - | - |
| 2025 Q3 | 1 | - |
| 2025 Q2 | 6 | - |
QTRX Ownership FAQ
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