Cytosorbents (CTSO) Short Interest Ratio & Short Volume $0.87 +0.03 (+3.55%) Closing price 04:00 PM EasternExtended Trading$0.87 0.00 (0.00%) As of 06:41 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Cytosorbents Short Interest DataCytosorbents (CTSO) has a short interest of 1.51 million shares. This marks a -6.79% decrease in short interest from the previous month. The short interest ratio (days to cover) is 12.3, indicating that it would take 12.3 days of the average trading volume of 145,916 shares to cover all short positions.Current Short Interest1,510,000 sharesPrevious Short Interest1,620,000 sharesChange Vs. Previous Month-6.79%Dollar Volume Sold Short$1.53 millionShort Interest Ratio12.3 Days to CoverLast Record DateApril 30, 2025Outstanding Shares62,610,000 sharesPercentage of Shares Shorted2.41%Today's Trading Volume45,797 sharesAverage Trading Volume145,916 sharesToday's Volume Vs. Average31% Short Selling Cytosorbents? Sign up to receive the latest short interest report for Cytosorbents and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCTSO Short Interest Over TimeCTSO Days to Cover Over TimeCTSO Percentage of Float Shorted Over Time Cytosorbents Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 4/30/20251,510,000 shares $1.53 million -6.8%N/A12.3 $1.01 4/15/20251,620,000 shares $1.64 million -7.4%3.2%16.2 $1.01 3/31/20251,750,000 shares $1.75 million -4.9%3.4%13 $1.00 3/15/20251,840,000 shares $2.02 million -0.5%3.6%7.5 $1.10 2/28/20251,850,000 shares $1.96 million -5.1%3.6%7.1 $1.06 2/15/20251,950,000 shares $2.54 million +1.0%3.8%7.5 $1.30 1/31/20251,930,000 shares $1.94 million +5.5%N/A7.5 $1.01 1/15/20251,830,000 shares $1.98 million +26.2%N/A7 $1.08 12/31/20241,450,000 shares $1.32 million +3.6%N/A5.7 $0.91 12/15/20241,400,000 shares $1.41 million +2.2%N/A10.7 $1.01 Get the Latest News and Ratings for CTSO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Cytosorbents and its competitors with MarketBeat's FREE daily newsletter. 11/30/20241,370,000 shares $1.33 million +5.4%N/A11.1 $0.97 11/15/20241,300,000 shares $1.16 million -4.4%N/A11.3 $0.90 10/31/20241,360,000 shares $1.37 million +0.7%N/A12.7 $1.01 10/15/20241,350,000 shares $1.47 million +1.5%N/A14.6 $1.09 9/30/20241,330,000 shares $2.00 million -5.7%N/A14.5 $1.50 9/15/20241,410,000 shares $1.52 million +1.4%N/A13.1 $1.08 8/31/20241,390,000 shares $1.46 million No ChangeN/A13.9 $1.05 8/15/20241,390,000 shares $1.42 million -2.1%N/A14.1 $1.02 7/31/20241,420,000 shares $1.70 million -2.1%N/A13.4 $1.20 7/15/20241,450,000 shares $1.55 million -2.0%N/A13.1 $1.07 6/30/20241,480,000 shares $1.04 million +0.7%N/A13.8 $0.70 6/15/20241,470,000 shares $1.24 million -3.3%N/A15.6 $0.84 5/31/20241,520,000 shares $1.37 million +4.1%N/A16.1 $0.90 5/15/20241,460,000 shares $1.23 million -5.8%N/A14.3 $0.84 4/30/20241,550,000 shares $1.26 million No ChangeN/A15.2 $0.81 4/15/20241,550,000 shares $1.34 million -4.3%N/A14.8 $0.87 3/31/20241,620,000 shares $1.54 million -3.0%N/A10.8 $0.95 3/15/20241,670,000 shares $1.47 million -2.9%N/A5.7 $0.88 2/29/20241,720,000 shares $1.65 million -1.7%N/A5 $0.96 2/15/20241,750,000 shares $1.77 million -2.8%N/A5 $1.01 1/31/20241,800,000 shares $1.82 million -17.1%N/A5 $1.01 1/15/20242,170,000 shares $2.16 million +7.4%N/A6.2 $0.99 12/31/20232,020,000 shares $2.24 million +8.6%N/A6.4 $1.11 12/15/20231,860,000 shares $3.18 million -0.5%N/A11.9 $1.71 11/30/20231,870,000 shares $2.24 million +11.3%4.9%18.8 $1.20 11/15/20231,680,000 shares $1.97 million +3.1%4.4%19 $1.17 10/31/20231,630,000 shares $2.51 million +0.6%4.3%23.5 $1.54 10/15/20231,620,000 shares $2.77 million +21.8%4.2%23.7 $1.71 9/30/20231,330,000 shares $2.50 million +9.0%3.5%18.3 $1.88 9/15/20231,220,000 shares $2.42 million +19.6%3.2%18.5 $1.98Gold Hits New Highs as Global Markets Spiral (Ad)When Trump took office in 2017, gold was just $1,100 an ounce. 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Get Garrett’s Top Four picks now. 7/30/20212,140,000 shares $16.29 million -2.7%5.6%8.9 $7.61 7/15/20212,200,000 shares $16.87 million +18.3%5.8%8.8 $7.67 6/30/20211,860,000 shares $14.04 million -11.9%4.9%7.2 $7.55 6/15/20212,110,000 shares $17.39 million +1.4%5.5%9.8 $8.24 5/28/20212,080,000 shares $16.83 million -7.1%5.4%9 $8.09 5/14/20212,240,000 shares $18.21 million +0.5%5.9%8.6 $8.13 4/30/20212,230,000 shares $20.29 million +6.7%5.8%8.2 $9.10 4/15/20212,090,000 shares $19.33 million +0.5%5.5%6.6 $9.25 3/31/20212,080,000 shares $17.49 million -16.1%5.4%6 $8.41 3/15/20212,480,000 shares $21.55 million +2.1%6.5%6.9 $8.69 2/26/20212,430,000 shares $23.60 million -0.4%6.4%7 $9.71 2/12/20212,440,000 shares $27.74 million -16.4%6.4%7.3 $11.37 1/29/20212,920,000 shares $26.69 million +0.3%7.6%8.7 $9.14 1/15/20212,910,000 shares $25.67 million No Change7.6%10 $8.82 CTSO Short Interest - Frequently Asked Questions What is Cytosorbents' current short interest? Short interest is the volume of Cytosorbents shares that have been sold short but have not yet been covered or closed out. As of April 30th, investors have sold 1,510,000 shares of CTSO short. Learn More on Cytosorbents' current short interest. What is a good short interest ratio for Cytosorbents? The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. CTSO shares currently have a short interest ratio of 12.0. Learn More on Cytosorbents's short interest ratio. Is Cytosorbents' short interest increasing or decreasing? Cytosorbents saw a drop in short interest in April. As of April 30th, there was short interest totaling 1,510,000 shares, a drop of 6.8% from the previous total of 1,620,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment. How does Cytosorbents' short interest compare to its competitors? Here is how the short interest of companies in the industry of "medical equipment" compare to Cytosorbents: Nyxoah S.A. (0.80%), Alpha Tau Medical Ltd. (0.22%), AVITA Medical, Inc. (12.05%), Inogen, Inc. (3.83%), Lakeland Industries, Inc. (2.59%), BrainsWay Ltd. (0.52%), Sight Sciences, Inc. (4.63%), TriSalus Life Sciences, Inc. (0.26%), LENSAR, Inc. (1.61%), KORU Medical Systems, Inc. (1.20%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks. What does it mean to sell short Cytosorbents stock? Short selling CTSO is an investing strategy that aims to generate trading profit from Cytosorbents as its price is falling. CTSO shares are trading up $0.04 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit. How does a short squeeze work against Cytosorbents? A short squeeze for Cytosorbents occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of CTSO, which in turn drives the price of the stock up even further. How often is Cytosorbents' short interest reported? Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including CTSO, twice per month. The most recent reporting period available is April, 30 2025. More Short Interest Resources from MarketBeat Related Companies NYXH Short Interest DRTS Short Interest RCEL Short Interest INGN Short Interest LAKE Short Interest BWAY Short Interest SGHT Short Interest TLSI Short Interest LNSR Short Interest KRMD Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:CTSO) was last updated on 5/21/2025 by MarketBeat.com Staff From Our PartnersWhite House to reset Social Security?Elon Musk's parting DOGE gift looks set to shock America... A single announcement by July 22nd could soon b...Altimetry | SponsoredTrump’s treachery Trump’s Final Reset Inside the shocking plot to re-engineer America’s financial system…and why you need to ...Porter & Company | SponsoredMan who predicted $100K Bitcoin sees a huge run coming for another coin …Sure enough, Bitcoin took off on the exact day Juan said it would. 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And it's one the Big Banks are alread...Premier Gold Co | Sponsored Adding Choose a watchlist: Watchlist Adding You have already added five stocks to your watchlist. Upgrade to MarketBeat All Access to add more stocks to your watchlist. Adding Cytosorbents Co. Please log in to your account or sign up in order to add this asset to your watchlist. Share Cytosorbents With A Colleague Link copied to clipboard. Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. Start Your 30-Day Trial MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. Stock Ideas and Recommendations See daily stock ideas from top analysts. Receive short-term trading ideas from MarketBeat. Identify trending stocks on social media. 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