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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 MillerCTO2026-08-1525$2.59
$64.75Sell
Michael Francis MillerCTO2026-08-1541$2.59
$106.19Sell
Michael Francis MillerCTO2026-08-15249$2.59
$644.91Sell
Michael Francis MillerCTO2026-08-15111$2.59
$287.49Sell
Michael Francis MillerCTO2026-08-1541$2.59
$106.19Sell
William P. DonnellyDirector2026-08-1372,245$2.93
$211.68kBuy
William P. DonnellyDirector2026-08-1227,155$2.75
$74.68kBuy
Michael Francis MillerCTO2026-07-3139$3.48
$135.72Sell
Michael Francis MillerCTO2026-07-15249$4.24
$1.06kSell
Michael Francis MillerCTO2026-07-15111$4.24
$470.64Sell

1 of 8

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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$17.14MInsider
Bain Capital Venture Investors LLC4.52%2,136,085$5.64MInsider
Biomerieux4.35%2,055,632$5.43MInsider
Flagship Ventures Fund 2004 L P4.29%2,030,495$5.36MInsider
David R. Walt3.96%1,872,890$4.94MInsider
Arch Venture Fund VI LP2.57%1,216,659$3.21MInsider
E. Kevin Hrusovsky1.92%910,249$2.40MInsider
Martin D. Madaus1.69%800,807$2.11MInsider
Masoud Toloue1.07%507,310$1.34MInsider
Paul M. Meister0.66%313,253$826.99kInsider

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QTRX vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
QTRX0.06%41.22%Net BuyingNet Buying
APYX0.05%20.99%Net BuyingNet Buying
MXCT0.06%12.93%Net Selling
INGN0.07%32.75%Net SellingNet Selling
LNSR0.04%51.49%Net Selling
View Top Medical Device Stocks

Quanterix Stock Ownership FAQ

Who owns Quanterix?

Quanterix (NASDAQ: QTRX) is owned by 0.06% institutional shareholders, 41.22% Quanterix insiders, and 58.71% 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 $17.34M.

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