NASDAQ: CTSO
Cytosorbents Corp Stock Ownership - Who owns Cytosorbents?

Insider buying vs selling

Have Cytosorbents Corp insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Alan D. SobelDirector2026-09-151,900$6.12
$11.63kBuy
Phillip P. ChanCEO2026-09-153,774$6.00
$22.64kBuy
Alan D. SobelDirector2026-09-15100$6.01
$601.00Buy
Alan D. SobelDirector2026-09-15500$6.05
$3.03kBuy
Vincent CapponiCOO;Pres2026-09-141,800$6.07
$10.93kBuy
Vincent CapponiCOO;Pres2026-09-14273$5.90
$1.61kBuy
Phillip P. ChanCEO2026-09-04200,000$0.35
$70.00kBuy
Peter J. MarianiChief Financial Officer2026-06-15100,000$0.44
$44.00kBuy
Phillip P. ChanChief Executive Officer2026-06-1510,333$0.43
$4.44kBuy
Phillip P. ChanChief Executive Officer2026-06-12251,136$0.40
$100.45kBuy

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Net Insider Buy/Sell (L12M) Ownership

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CTSO Shareholders

What type of owners hold Cytosorbents Corp stock?

Institutional
Insider
Retail
NameHoldSharesValueType
David Lamadrid249.43%7,837,500$45.07MInsider
Guillermina Vega Montiel158.94%4,993,984$28.72MInsider
Margie Chassman152.60%4,795,000$27.57MInsider
Robert Shipley94.61%2,972,819$17.09MInsider
Njtc Investment Fund LP81.31%2,554,999$14.69MInsider
Peter J. Mariani20.31%638,113$3.67MInsider
Kathleen P. Bloch19.53%613,641$3.53MInsider
Efthymios Deliargyris15.05%473,025$2.72MInsider
Joseph Rubin9.75%306,363$1.76MInsider
Alex Damico6.68%210,000$1.21MInsider

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CTSO vs Medical Device Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CTSO0.06%99.94%Net BuyingNet Buying
MODD0.02%99.98%
LFWD0.00%100.00%
PLSM0.01%30.99%
NMTC0.02%39.28%Net BuyingNet Buying

Cytosorbents Stock Ownership FAQ

Who owns Cytosorbents?

Cytosorbents (NASDAQ: CTSO) is owned by 0.51% institutional shareholders, 835.50% Cytosorbents insiders, and 0.00% retail investors. David Lamadrid is the largest individual Cytosorbents shareholder, owning 7.84M shares representing 249.43% of the company. David Lamadrid's Cytosorbents shares are currently valued at $45.07M.

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