Quanterix
QTRX · NASDAQ
$2.72−$0.05 (−1.81%)TodayMarket closed ·
Prev close $2.77
Who owns QTRX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 45.8% of QTRX’s shares.
- Blue Water Life Science Advisors, LP.7.4%
- BlackRock Institutional Trust Company, N.A.7.0%
- First Eagle Investment Management, L.L.C.5.8%
- Telegraph Hill Partners5.3%
- Next 6 largest institutions20.3%
- All other shareholders54.2%
| Holder | Shares | % of shares |
|---|---|---|
| Blue Water Life Science Advisors, LP. | 3.47M | 7.37% |
| BlackRock Institutional Trust Company, N.A. | 3.30M | 7.01% |
| First Eagle Investment Management, L.L.C. | 2.75M | 5.84% |
| Telegraph Hill Partners | 2.50M | 5.32% |
| Portolan Capital Management, L.L.C. | 1.90M | 4.03% |
| Walt (David R) | 1.87M | 3.96% |
| Vanguard Capital Management, LLC | 1.80M | 3.82% |
| Lionhunter Capital Management, LLC | 1.50M | 3.18% |
| AQR Capital Management, LLC | 1.34M | 2.85% |
| Geode Capital Management, L.L.C. | 1.13M | 2.40% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| First Eagle Small Cap Opportunity Fund | 2.39M | 5.07% |
| Strategic Advisers US Total Stock Fund | 1.44M | 3.06% |
| Vanguard Total Stock Market Index Fund | 1.25M | 2.66% |
| iShares Russell 2000 ETF | 1.12M | 2.38% |
| Invenomic Fund | 771.54K | 1.64% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $296.05K (3 trades) of QTRX on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Miller Michael Francis | Option exercise | 834 | — |
| Miller Michael Francis | Option exercise | 372 | — |
| Miller Michael Francis | Option exercise | 135 | — |
| Miller Michael Francis | Option exercise | 136 | — |
| Miller Michael Francis | Option exercise | 81 | — |
| Miller Michael Francis | Tax withholding | 249 | $764 |
| Miller Michael Francis | Option exercise | 834 | — |
| Miller Michael Francis | Tax withholding | 111 | $341 |
| Miller Michael Francis | Option exercise | 372 | — |
| Miller Michael Francis | Tax withholding | 41 | $126 |
Short interest
Settled Sep 30, 2026
- Shares short
- 5.05M
- Days to cover
- 7.43
- % of shares outstanding
- 10.71%
- Average daily volume
- 679.62K
- Change since last report
- +1.4%
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