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Who owns Quanterix (QTRX) stock

128 funds reported Quanterix (QTRX) shares in their latest 13F filings, worth $163M in all. The largest holder is First Eagle Investment Management, LLC ($23.8M). Last quarter 73 funds added to their stakes and 55 cut them.

Largest holders of QTRX (13F)Largest holders of QTRX (13F)First Eagle Investment Management…$23.8MVanguard Group$17.0MBlackRock$15.7MBlue Water Life Science Advisors,…$15.0MPortolan Capital Management, LLC$8.2MVanguard Capital Management LLC$7.8MLionhunter Capital Management, LLC$6.5MAQR Capital Management LLC$5.8MKent Lake PR LLC$5.4MGeode Capital Management, LLC$4.9M

Largest holders (13F)

FundSharesValueChangeQuarter
First Eagle Investment Management, LLC5,506,330$23.8Mincrease2026-06-30
Vanguard Group2,677,833$17.0Mincrease2025-12-31
BlackRock3,635,411$15.7Mincrease2026-06-30
Blue Water Life Science Advisors, LP3,474,202$15.0Mincrease2026-06-30
Portolan Capital Management, LLC1,899,308$8.2Mdecrease2026-06-30
Vanguard Capital Management LLC1,800,644$7.8Mincrease2026-06-30
Lionhunter Capital Management, LLC1,500,427$6.5Mbase2026-06-30
AQR Capital Management LLC1,343,005$5.8Mincrease2026-06-30
Kent Lake PR LLC1,001,000$5.4Mdecrease2025-09-30
Geode Capital Management, LLC1,131,377$4.9Mincrease2026-06-30
Ameriprise Financial987,424$4.3Mdecrease2026-06-30
Marshall Wace, LLP973,872$4.2Mincrease2026-06-30
State Street932,307$4.0Mincrease2026-06-30
Tikvah Management LLC571,555$2.5Mdecrease2026-06-30
Vanguard Portfolio Management LLC489,566$2.1Mdecrease2026-06-30

Quanterix's latest quarter

Quanterix, Q2 2026: revenue $32.9M (+34% year over year), operating margin -150.2%, net loss $48.9M, operating cash flow −$5.1M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most QTRX stock?

By the latest 13F filings: First Eagle Investment Management, LLC ($23.8M); Vanguard Group ($17.0M); BlackRock ($15.7M); Blue Water Life Science Advisors, LP ($15.0M); Portolan Capital Management, LLC ($8.2M).

What is the short interest in QTRX?

4,678,542 shares were sold short at the 2026-10-15 settlement, -7.3% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.