Cytosorbents
CTSO • NASDAQ
Cytosorbents is a medical - devices company in the healthcare sector on NASDAQ, led by Phillip P. Chan, with a market cap of $42.9M. As of Q3 2025, 26% of shares are held by 48 institutional investors, with AVENIR CORP as the largest holder at 8.1%.
CEO and PresidentPhillip P. Chan
Market Cap$42.9M
Medical - Devices
Healthcare
Employees186.0
Websitecytosorbents.com
Country
United States of America
Overview
Overview of institutional ownership in CTSO as of Q3 2025 with a market cap of $58.6M
All Institutions
- Institutions
- 48
- Value Held
- $15.3M
- Shares Held
- 16.3M
- Avg Position
- $317.8K
- Median Position
- $48.4K
Hedge Funds
- Hedge Funds
- 6
- Value Held
- $2.3M
- Shares Held
- 2.5M
- Avg Position
- $384.2K
- Median Position
- $83.1K
Ownership Breakdown
Based on market cap of $58.6M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in CTSO as of Q3 2025
| Institution | Position Value |
|---|---|
 AVENIR CORP Long Only Manager | $4.7M 0.49% of portfolio |
 VANGUARD GROUP INC Institution | $2.1M 0.00% of portfolio |
 Skylands Capital, LLC Hedge Fund•Multi-Strategy | $2.0M 0.27% of portfolio |
N Neuberger Berman Group LLC Institution | $1.5M 0.00% of portfolio |
C CM Management, LLC Institution | $1.2M 1.00% of portfolio |
B BlackRock, Inc. Institution | $714.4K 0.00% of portfolio |
 Sargent Investment Group, LLC RIA/Wealth | $690.0K 0.10% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $562.0K 0.00% of portfolio |
A Atlantic Trust Group, LLC Institution | $161.3K 0.00% of portfolio |
 STATE STREET CORP Institution | $148.8K 0.00% of portfolio |
Net Capital Flow
Institutional buying and selling activity for CTSO in Q3 2025
- Traded
- −$76.3K
- Buyers
- 22
- Sellers
- 11
- Total Bought
- +$452.5K
- Total Sold
- −$528.8K
- Avg Position
- $299.1K
Biggest Buyers
| Institution | Net Bought |
|---|---|
 GSA CAPITAL PARTNERS LLP Hedge Fund•Quant | +$104.8K +112.2K shares |
VANGUARD GROUP INC Institution | +$74.3K +79.5K shares |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | +$61.4K +65.7K shares |
 Warren Averett Asset Management, LLC RIA/Wealth | +$51.9K +55.6K shares |
C CM Management, LLC Institution | +$35.6K +38.1K shares |
AVENIR CORP Long Only Manager | +$22.7K +24.3K shares |
B BlackRock, Inc. Institution | +$17.9K +19.2K shares |
 RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | +$17.0K +18.2K shares |
T TWO SIGMA SECURITIES, LLC Institution | +$14.7K +15.7K shares |
L LPL Financial LLC Institution | +$13.9K +14.9K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
Skylands Capital, LLC Hedge Fund•Multi-Strategy | −$457.2K −489.5K shares |
 SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | −$31.4K −33.6K shares |
S Squarepoint Ops LLC Hedge Fund•Quant | −$15.0K −11.7K shares |
Sargent Investment Group, LLC RIA/Wealth | −$7.0K −7.5K shares |
 UBS Group AG Institution | −$6.7K −7.1K shares |
 Kestra Advisory Services, LLC RIA/Wealth | −$5.9K −6.4K shares |
N N.E.W. Advisory Services LLC RIA/Wealth | −$3.5K −2.7K shares |
G Granite Springs Asset Management LLC Hedge Fund•Credit Arb | −$934.1 −1.0K shares |
 Creative Planning RIA/Wealth | −$616.5 −660.0 shares |
 BANK OF AMERICA CORP /DE/ Institution | −$346.5 −371.0 shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited CTSO in Q3 2025
- New Positions
- 5
- New Value
- $77.3K
- Exited Positions
- 3
- Exited Value
- $18.5K
New Positions
| Institution | Position Value |
|---|---|
Warren Averett Asset Management, LLC RIA/Wealth | $51.9K 55.6K shares |
L LPL Financial LLC Institution | $13.9K 14.9K shares |
 Centiva Capital, LP Hedge Fund•Multi-Strategy | $10.0K 10.7K shares |
 Rockefeller Capital Management L.P. Long Only Manager | $934.0 1.0K shares |
J JONES FINANCIAL COMPANIES LLLP Institution | $553.0 593.0 shares |
Exited Positions
| Institution | Previous Position |
|---|---|
S Squarepoint Ops LLC Hedge Fund•Quant | $15.0K 11.7K shares |
N N.E.W. Advisory Services LLC RIA/Wealth | $3.5K 2.7K shares |
S SIMPLEX TRADING, LLC Institution | - 100.0 shares |
Options Activity
Institutions with the largest Call and Put options positions in CTSO as of Q3 2025
- Call Positions
- 1
- Call Value
- -
- Put Positions
- 0
- Put Value
- -
Call Positions
| Institution | Position Value |
|---|---|
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | - - contracts |
Put Positions
| Institution | Position Value |
|---|---|
| No put positions found | |
Most Committed Institutions
Institutions with CTSO as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
C CM Management, LLC Institution | 1.00% $1.2M |
AVENIR CORP Long Only Manager | 0.49% $4.7M |
Skylands Capital, LLC Hedge Fund•Multi-Strategy | 0.27% $2.0M |
Sargent Investment Group, LLC RIA/Wealth | 0.10% $690.0K |
 Key Client Fiduciary Advisors, LLC RIA/Wealth | 0.02% $73.3K |
G Granite Springs Asset Management LLC Hedge Fund•Credit Arb | 0.01% $16.2K |
 NWF Advisory Services Inc. RIA/Wealth | 0.01% $97.3K |
GSA CAPITAL PARTNERS LLP Hedge Fund•Quant | 0.01% $104.8K |
T TWO SIGMA SECURITIES, LLC Institution | 0.00% $14.7K |
N Neuberger Berman Group LLC Institution | 0.00% $1.5M |
Hedge Fund Spotlight
Discover hedge funds investing in CTSO
CITADEL ADVISORS LLC
Hedge Fund • Multi-Strategy
Portfolio ManagerKenneth Cordele Griffin
- Portfolio Value
- $122.08B
- Positions
- 5,531
- Last Reported
- Q3 2025
Sector Allocation
Position in Cytosorbents
- Market Value
- $61.4K
- Shares Held
- 65.7K
- Portfolio Weight
- 0.00%
- Owned Since
- 2024-Q2
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
Software - Infrastructure Technology | $2.1B | 1.68% | |
Semiconductors Technology | $1.8B | 1.50% | |
Internet Content & Information Communication Services | $1.4B | 1.18% |
