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 CEO2025-10-151,242$5.78
$7.18kSell
Vandana SriramChief Financial Officer2025-10-15229$5.78
$1.32kSell
Scott MendelDirector2025-10-012,084$5.54
$11.55kBuy
William P. DonnellyDirector2025-10-015,076$5.54
$28.12kBuy
David R. WaltDirector2025-10-012,594$5.54
$14.37kBuy
Goldman Myla LaiDirector2025-10-012,084$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
Vandana SriramChief Financial Officer2025-09-124,150$4.79
$19.88kBuy

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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$34.67MInsider
Ameriprise Financial Inc10.91%4,236,877$22.62MInstitution
Portolan Capital Management LLC9.36%3,633,622$19.40MInstitution
Blackrock Inc7.53%2,924,699$15.62MInstitution
Vanguard Group Inc6.51%2,528,950$13.50MInstitution
Kent Lake Pr LLC5.93%2,301,000$12.29MInstitution
Bain Capital Venture Investors LLC5.50%2,136,085$11.41MInsider
Biomerieux5.29%2,055,632$10.98MInsider
Flagship Ventures Fund 2004 L P5.23%2,030,495$10.84MInsider
David R. Walt4.82%1,871,675$9.99MInsider

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QTRX vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
QTRX64.34%35.66%Net BuyingNet Buying
CATX25.94%74.06%Net Buying
PMI0.00%0.00%
ELMD31.12%68.88%Net SellingNet Selling
INGN70.16%29.84%Net SellingNet Selling

Quanterix Stock Ownership FAQ

Who owns Quanterix?

Quanterix (NASDAQ: QTRX) is owned by 89.39% institutional shareholders, 49.54% Quanterix insiders, and 0.00% retail investors. Keith Crandell is the largest individual Quanterix shareholder, owning 6.49M shares representing 16.72% of the company. Keith Crandell's Quanterix shares are currently valued at $34.67M.

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