Quanterix Ownership | Who Owns Quanterix?
Quanterix Ownership Summary
Quanterix is owned by 63.30% institutional investors, 6.30% insiders, and 30.40% 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 | 63.30% | 6.30% | 30.40% |
| Sector | Healthcare Stocks | 50.44% | 12.38% | 37.18% |
| Industry | Medical Device Stocks | 49.22% | 12.60% | 38.18% |
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 |
| Blue water life science advisors, lp | 3.47M | 7.40% | $15.01M |
| First eagle investment management | 2.75M | 5.86% | $11.89M |
| Vanguard group | 2.68M | 5.81% | $17.03M |
| Portolan capital management | 1.90M | 4.04% | $8.21M |
| Vanguard capital management | 1.80M | 3.83% | $7.78M |
| Aqr capital management | 1.34M | 2.86% | $5.80M |
| Kent lake pr | 1.00M | 2.57% | $5.44M |
| Geode capital management | 1.13M | 2.41% | $4.89M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Blue water life science advisors, lp | 3.47M | 9.45% | $15.01M |
| Kent lake pr | 1.00M | 2.75% | $5.44M |
| Ashford capital management | 771.30K | 1.38% | $10.19M |
| Pharvision advisers | 13.04K | 1.06% | $56.33K |
| Tikvah management | 571.55K | 0.75% | $2.47M |
| Kent lake capital | 75.00K | 0.45% | $990.75K |
| Portolan capital management | 1.90M | 0.31% | $8.21M |
| Ironwood investment management | 170.56K | 0.25% | $736.80K |
| Gsa capital partners llp | 410.25K | 0.11% | $1.77M |
| Clarivest asset management | 43.03K | 0.06% | $568.49K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| First eagle investment management | 2.75M | 0.02% | 1.45M |
| Blue water life science advisors, lp | 3.47M | 9.45% | 1.33M |
| Aqr capital management | 1.34M | 0.00% | 1.26M |
| Balyasny asset management | 767.80K | 0.01% | 723.29K |
| Jacobs levy equity management | 487.60K | 0.01% | 487.60K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ameriprise financial | 987.42K | 0.00% | -2.55M |
| William blair investment management | - | - | -2.08M |
| Invenomic capital management lp | - | - | -1.93M |
| Lord, abbett | - | - | -1.76M |
| Levin capital strategies | - | - | -1.46M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Jacobs levy equity management | 487.60K | 0.01% | 487.60K | $2.11M |
| Sixth street partners management company | 310.70K | 0.00% | 310.70K | $1.34M |
| Cerity partners | 78.08K | 0.00% | 78.08K | $337.32K |
| Algert global | 55.22K | 0.00% | 55.22K | $238.54K |
| Susquehanna fundamental investments | 38.96K | 0.00% | 38.96K | $168.31K |
Sold Out
| Holder | Change |
|---|---|
| Ifp advisors | -8.00 |
| Advisory services network | -9.00 |
| Northwestern mutual wealth management | -13.00 |
| Manchester capital management | -23.00 |
| Innealta capital | -26.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 135 | 4.65% | 29,739,688 | -18.40% | 63 | 1.05% | 82 | 17.14% | 29 | -19.44% |
| 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% |
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 |
|---|---|---|---|---|
| Aug 12, 2026 | DONNELLY WILLIAM P | - | Buy | $74.68K |
| Aug 13, 2026 | DONNELLY WILLIAM P | - | Buy | $211.68K |
| May 12, 2026 | Meadows Benjamin | Chief Commercial Officer | Buy | $9.70K |
| Sep 12, 2025 | Sriram Vandana | Chief Financial Officer | Buy | $19.88K |
| Jun 13, 2025 | WALT DAVID R | - | Buy | $760.80K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | 2 | - |
| 2026 Q2 | 1 | - |
| 2026 Q1 | - | - |
| 2025 Q4 | - | - |
| 2025 Q3 | 1 | - |
QTRX Ownership FAQ
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