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Cytosorbents Corp

CTSO
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
SEC CIK
0001175151

In the last 90 days, Cytosorbents Corp insiders filed 4 open-market purchases and 0 sales; 50 institutions reported holding it in 13F filings for Q2 2026, worth $6.04M in total; no superinvestor holds it.

13F holders, Q4 2025

Institutional positions in Cytosorbents Corp as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
51
+3 vs. Q3 2025
Shares held
16.9M
+543.3K (+3.3%) vs. Q3 2025
Total value
$10.8M
−$4.46M (−29.3%) vs. Q3 2025
New holders
9
14 more added
Sold out
6
10 more reduced

1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting CTSO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2025: 51 institutions
Q1 2021: 96 institutionsQ2 2021: 102 institutionsQ3 2021: 96 institutionsQ4 2021: 91 institutionsQ1 2022: 88 institutionsQ2 2022: 78 institutionsQ3 2022: 60 institutionsQ4 2022: 53 institutionsQ1 2023: 59 institutionsQ2 2023: 58 institutionsQ3 2023: 53 institutionsQ4 2023: 54 institutionsQ1 2024: 50 institutionsQ2 2024: 50 institutionsQ3 2024: 53 institutionsQ4 2024: 51 institutionsQ1 2025: 49 institutionsQ2 2025: 45 institutionsQ3 2025: 49 institutionsQ4 2025: 51 institutionsQ1 2026: 50 institutionsQ2 2026: 50 institutions
Value heldQ4 2025: $10.8M
Q1 2021: $151.6MQ2 2021: $132.4MQ3 2021: $149.2MQ4 2021: $74.6MQ1 2022: $57.3MQ2 2022: $33.9MQ3 2022: $20.7MQ4 2022: $22.7MQ1 2023: $51.3MQ2 2023: $54.7MQ3 2023: $28.7MQ4 2023: $20.0MQ1 2024: $16.7MQ2 2024: $11.8MQ3 2024: $24.7MQ4 2024: $14.1MQ1 2025: $16.9MQ2 2025: $20.7MQ3 2025: $15.3MQ4 2025: $10.8MQ1 2026: $9.32MQ2 2026: $6.04M
Institutions holding CTSO and their total value by quarter
QuarterHoldersValue
Q2 202650$6.04M
Q1 202650$9.32M
Q4 202551$10.8M
Q3 202549$15.3M
Q2 202545$20.7M
Q1 202549$16.9M
Q4 202451$14.1M
Q3 202453$24.7M
Q2 202450$11.8M
Q1 202450$16.7M
Q4 202354$20.0M
Q3 202353$28.7M
Q2 202358$54.7M
Q1 202359$51.3M
Q4 202253$22.7M
Q3 202260$20.7M
Q2 202278$33.9M
Q1 202288$57.3M
Q4 202191$74.6M
Q3 202196$149.2M
Q2 2021102$132.4M
Q1 202196$151.6M

Institutions, Q4 2025

Shares, value and share of portfolio for each institution holding Cytosorbents Corp; share changes are against Q3 2025.

Institutions holding CTSO in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Avenir Corp5,230,099$3.34M0.36%+147,261+2.9%Added
Vanguard Group Inc2,204,294$1.41M0.00%00.0%Unchanged
Skylands Capital, LLC1,854,515$1.19M0.16%−272,750−12.8%Reduced
Neuberger Berman Group LLC1,625,640$1.04M0.00%+27,642+1.7%Added
CM Management, LLC1,476,500$943.8K0.80%+188,372+14.6%Added
BlackRock, Inc.770,551$492.5K0.00%+5,742+0.8%Added
Sargent Investment Group, LLC612,000$391.2K0.05%−126,700−17.2%Reduced
Geode Capital Management, LLC603,767$386.0K0.00%+2,316+0.4%Added
Pathstone Holdings, LLC499,955$319.6K0.00%+499,955New
CIBC Private Wealth Group, LLC172,649$110.4K0.00%00.0%Unchanged
State Street Corp159,293$101.8K0.00%00.0%Unchanged
Citadel Advisors LLC149,279$95.4K0.00%+83,589+127.2%Added
Gsa Capital Partners LLP148,374$95.0K0.01%+36,157+32.2%Added
Advisor Group Holdings, Inc.130,419$83.4K0.00%00.0%Unchanged
Morgan Stanley116,480$74.5K0.00%+9,224+8.6%Added
UBS Group AG115,272$73.7K0.00%+69+0.1%Added
Raymond James Financial Inc108,702$69.5K0.00%−190.0%Reduced
NWF Advisory Services Inc.104,139$66.6K0.01%00.0%Unchanged
Renaissance Technologies LLC100,120$64.0K0.00%−34,685−25.7%Reduced
Northern Trust Corp92,540$59.2K0.00%+980+1.1%Added
Susquehanna International Group, LLP83,363$53.3K0.00%−14,858−15.1%Reduced
Key Client Fiduciary Advisors, LLC78,457$50.1K0.02%00.0%Unchanged
Warren Averett Asset Management, LLC55,556$35.5K0.00%00.0%Unchanged
Stifel Financial Corp48,000$30.7K0.00%00.0%Unchanged
Bank of America Corp38,706$24.7K0.00%+30.0%Added
Goldman Sachs Group Inc35,952$23.0K0.00%−24,600−40.6%Reduced
XTX Topco Ltd29,682$19.0K0.00%+29,682New
EP Wealth Advisors, LLC28,000$17.9K0.00%+28,000New
Atomi Financial Group, Inc.27,443$17.5K0.00%00.0%Unchanged
Kestra Advisory Services, LLC25,700$16.4K0.00%−38,828−60.2%Reduced
LPL Financial LLC23,066$14.7K0.00%+8,160+54.7%Added
Creative Planning21,295$13.6K0.00%−160−0.7%Reduced
Seelaus Asset Management LLC17,300$11.1K0.01%00.0%Unchanged
Merit Financial Group, LLC15,297$9.78K0.00%00.0%Unchanged
First National Bank of Omaha15,225$9.78K0.00%+15,225New
Texas Capital Bank Wealth Management Services Inc11,000$7.03K0.00%+11,000New
Virtu Financial LLC10,780$7.00K0.00%+10,780New
Millennium Management LLC10,205$6.52K0.00%+10,205New
Comerica Bank4,376$2.80K0.00%+819+23.0%Added
Rockefeller Capital Management L.P.2,566$1.64K0.00%+1,566+156.6%Added
Global Retirement Partners, LLC2,265$1.45K0.00%+2,265New
Tower Research Capital LLC (TRC)2,170$1.39K0.00%−3,437−61.3%Reduced
Wells Fargo & Company730$4670.00%00.0%Unchanged
FMR LLC384$2450.00%+384New
JPMorgan Chase & Co372$2380.00%00.0%Unchanged
Your Advocates Ltd., LLP250$1600.00%00.0%Unchanged
MAI Capital Management233$1490.00%00.0%Unchanged
Jones Financial Companies LLLP93$590.00%−500−84.3%Reduced
Medallion Wealth Advisors, LLC45$290.00%00.0%Unchanged
The PNC Financial Services Group, Inc.31$200.00%00.0%Unchanged
BNP Paribas Arbitrage, SA20$130.00%00.0%Unchanged
SEI Investments Co0$00.00%−17,734−100.0%Sold out
Two Sigma Securities, LLC0$00.00%−15,737−100.0%Sold out
Chicago Partners Investment Group LLC0$00.00%−14,209−100.0%Sold out
Centiva Capital, LP0$00.00%−10,737−100.0%Sold out
Royal Bank of Canada0$00.00%−1,100−100.0%Sold out
SBI Securities Co., Ltd.0$00.00%−1−100.0%Sold out
Country Club Bank––––Not filed