Quanterix Ownership | Who Owns Quanterix?
Quanterix Ownership Summary
Quanterix is owned by 19.97% institutional investors, 6.24% insiders, and 73.80% retail investors. Blackrock is the largest institutional shareholder, holding 8.23% of QTRX shares. First Eagle US Small Cap Strategy is the top mutual fund, with 5.14% of its assets in Quanterix shares.
QTRX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Quanterix | 19.97% | 6.24% | 73.80% |
| Sector | Healthcare Stocks | 35.56% | 12.08% | 52.36% |
| Industry | Medical Device Stocks | 36.89% | 11.20% | 51.91% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 3.14M | 8.23% | $41.45M |
| Blackrock funding, inc. /de | 3.64M | 7.74% | $15.70M |
| Ameriprise financial | 3.54M | 7.57% | $12.47M |
| Portolan capital management | 2.95M | 6.30% | $10.37M |
| First eagle investment management | 2.75M | 5.86% | $11.89M |
| Vanguard group | 2.68M | 5.81% | $17.03M |
| Blue water life science advisors, lp | 2.14M | 4.58% | $7.54M |
| William blair investment management | 2.08M | 4.45% | $7.33M |
| Invenomic capital management lp | 1.93M | 4.13% | $6.80M |
| Kent lake pr | 1.00M | 2.57% | $5.44M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Blue water life science advisors, lp | 2.14M | 6.05% | $7.54M |
| Kent lake pr | 1.00M | 2.75% | $5.44M |
| Ashford capital management | 771.30K | 1.38% | $10.19M |
| Empire financial management company | 617.83K | 0.85% | $3.93M |
| Tikvah management | 571.62K | 0.62% | $2.01M |
| Portolan capital management | 2.95M | 0.55% | $10.37M |
| Kent lake capital | 75.00K | 0.45% | $990.75K |
| Topline capital management | 563.13K | 0.33% | $1.98M |
| Invenomic capital management lp | 1.93M | 0.31% | $6.80M |
| Ironwood investment management | 169.82K | 0.25% | $597.78K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| First eagle investment management | 2.75M | 0.02% | 1.45M |
| Balyasny asset management | 767.80K | 0.01% | 723.29K |
| Topline capital management | 563.13K | 0.33% | 563.13K |
| Marshall wace, llp | 622.38K | 0.00% | 467.21K |
| Invenomic capital management lp | 1.93M | 0.31% | 427.18K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Lord, abbett | - | - | -1.76M |
| Portolan capital management | 2.95M | 0.55% | -1.58M |
| Levin capital strategies | - | - | -1.46M |
| Ameriprise financial | 3.54M | 0.00% | -1.45M |
| Kent lake pr | 1.00M | 2.75% | -1.30M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Topline capital management | 563.13K | 0.33% | 563.13K | $1.98M |
| Vanguard fiduciary trust | 270.53K | 0.00% | 270.53K | $952.26K |
| Point72 asset management | 93.25K | 0.00% | 93.25K | $328.25K |
| Dynamic technology lab private | 77.87K | 0.04% | 77.87K | $274.11K |
| Pharvision advisers | 36.14K | 0.11% | 36.14K | $196.26K |
Sold Out
| Holder | Change |
|---|---|
| Ifp advisors | -8.00 |
| Manchester capital management | -23.00 |
| Innealta capital | -26.00 |
| Ronald blue trust | -31.00 |
| Capital performance advisors llp | -34.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 48 | -63.64% | 9,340,817 | -73.40% | 19 | 0.34% | 27 | -57.14% | 7 | -83.33% |
| 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% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| First Eagle US Small Cap Strategy | 2.42M | 5.14% | 1.29M |
| First Eagle Small Cap Opportunity I | 2.39M | 5.07% | 460.19K |
| Strategic Advisers U.S. Total Stock{mg} | 1.45M | 3.79% | 91.44K |
| Strategic Advisers Small-Mid Cap | 1.30M | 3.39% | 283.56K |
| Strategic Advisers U.S. Total Stock | 1.44M | 3.06% | -258.97K |
| 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 | 2.66% | - |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.25M | 2.66% | - |
| AB Small Cap Growth A | 1.26M | 2.53% | -30.56K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 12, 2026 | Meadows Benjamin | Chief Commercial Officer | Buy | $9.70K |
| Sep 12, 2025 | Sriram Vandana | Chief Financial Officer | Buy | $19.88K |
| Jun 12, 2025 | WALT DAVID R | - | Buy | $224.17K |
| Jun 13, 2025 | WALT DAVID R | - | Buy | $760.80K |
| Jun 09, 2025 | Toloue Masoud | President & CEO | Buy | $248.72K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | - | - |
| 2026 Q2 | 1 | - |
| 2026 Q1 | - | - |
| 2025 Q4 | - | - |
| 2025 Q3 | 1 | - |
QTRX Ownership FAQ
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