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

Insider buying vs selling

Have Quanterix Corp insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Masoud TolouePresident CEO2025-10-31254$5.34
$1.36kSell
Masoud TolouePresident CEO2025-10-151,242$5.78
$7.18kSell
Vandana SriramChief Financial Officer2025-10-15229$5.78
$1.32kSell
Goldman Myla LaiDirector2025-10-012,084$5.54
$11.55kBuy
William P. DonnellyDirector2025-10-015,076$5.54
$28.12kBuy
David R. WaltDirector2025-10-012,594$5.54
$14.37kBuy
Scott MendelDirector2025-10-012,084$5.54
$11.55kBuy
Masoud TolouePresident CEO2025-09-30254$5.43
$1.38kSell
Masoud TolouePresident CEO2025-09-151,242$4.97
$6.17kSell
Vandana SriramChief Financial Officer2025-09-15229$4.97
$1.14kSell

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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 Crandell16.72%6,492,922$33.24MInsider
Ameriprise Financial Inc10.91%4,236,877$21.69MInstitution
Portolan Capital Management LLC9.36%3,633,622$18.60MInstitution
Blackrock Inc7.53%2,924,699$14.97MInstitution
Vanguard Group Inc6.51%2,528,950$12.95MInstitution
Kent Lake Pr LLC5.93%2,301,000$11.78MInstitution
Bain Capital Venture Investors LLC5.50%2,136,085$10.94MInsider
Biomerieux5.29%2,055,632$10.52MInsider
Flagship Ventures Fund 2004 L P5.23%2,030,495$10.40MInsider
David R. Walt4.82%1,871,675$9.58MInsider

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QTRX vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
QTRX64.34%35.66%Net BuyingNet Buying
SI0.00%58.21%Net BuyingNet Buying
VMD67.31%13.52%Net SellingNet Selling
TLSI17.23%41.95%Net Buying
TMCI47.39%52.61%Net Buying

Quanterix Stock Ownership FAQ

Who owns Quanterix?

Quanterix (NASDAQ: QTRX) is owned by 74.31% institutional shareholders, 41.18% Quanterix insiders, and 0.00% retail investors. Keith Crandell is the largest individual Quanterix shareholder, owning 6.49M shares representing 13.90% of the company. Keith Crandell's Quanterix shares are currently valued at $32.46M.

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