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NASDAQ: QTRX
Quanterix Corp Stock Ownership - Who owns Quanterix?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Quanterix Corp insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Michael Francis MillerCTO2026-10-15249$3.07
$764.43Sell
Michael Francis MillerCTO2026-10-1525$3.07
$76.75Sell
Michael Francis MillerCTO2026-10-1541$3.07
$125.87Sell
Michael Francis MillerCTO2026-10-1541$3.07
$125.87Sell
Michael Francis MillerCTO2026-10-15111$3.07
$340.77Sell
William P. DonnellyDirector2026-10-016,964$3.41
$23.75kBuy
Scott MendelDirector2026-10-014,398$3.41
$15.00kBuy
Michael Francis MillerCTO2026-09-1541$2.72
$111.52Sell
Michael Francis MillerCTO2026-09-1541$2.72
$111.52Sell
Michael Francis MillerCTO2026-09-1525$2.72
$68.00Sell

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Net Insider Buy/Sell (L12M) Ownership

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QTRX Shareholders

What type of owners hold Quanterix Corp stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Keith Crandell13.73%6,492,922$19.93MInsider
Bain Capital Venture Investors LLC4.52%2,136,085$6.56MInsider
Biomerieux4.35%2,055,632$6.31MInsider
Flagship Ventures Fund 2004 L P4.29%2,030,495$6.23MInsider
David R. Walt3.96%1,872,890$5.75MInsider
Arch Venture Fund VI LP2.57%1,216,659$3.74MInsider
E. Kevin Hrusovsky1.92%910,249$2.79MInsider
Martin D. Madaus1.69%800,807$2.46MInsider
Masoud Toloue1.07%507,310$1.56MInsider
Paul M. Meister0.66%313,253$961.69kInsider

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QTRX vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
QTRX0.06%41.19%Net BuyingNet Buying
MXCT0.06%12.93%Net Selling
APYX0.05%20.99%Net Buying
INGN0.07%32.80%Net SellingNet Selling
LUCD0.03%21.12%Net Buying
View Top Medical Device Stocks

Quanterix Stock Ownership FAQ

Who owns Quanterix?

Quanterix (NASDAQ: QTRX) is owned by 0.06% institutional shareholders, 41.19% Quanterix insiders, and 58.74% retail investors. Keith Crandell is the largest individual Quanterix shareholder, owning 6.49M shares representing 13.73% of the company. Keith Crandell's Quanterix shares are currently valued at $18.63M.

If you're new to stock investing, here's how to buy Quanterix stock.
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