IO Biotech (IOBT) Short Interest Ratio & Short Volume $1.48 -0.07 (-4.52%) Closing price 06/10/2025 04:00 PM EasternExtended Trading$1.44 -0.04 (-2.70%) As of 05:05 AM 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 TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock IO Biotech Short Interest DataIO Biotech (IOBT) has a short interest of 167,500 shares, representing 0.35% of the float (the number of shares available for trading by the public). This marks a 52.55% increase in short interest from the previous month. The short interest ratio (days to cover) is 1.0, indicating that it would take 1.0 days of the average trading volume of 279,720 shares to cover all short positions.Current Short Interest167,500 sharesPrevious Short Interest109,800 sharesChange Vs. Previous Month+52.55%Dollar Volume Sold Short$170.85 thousandShort Interest Ratio1.0 Days to CoverLast Record DateMay 15, 2025Outstanding Shares65,881,000 sharesFloat Size48,450,000 sharesShort Percent of Float0.35%Today's Trading Volume178,441 sharesAverage Trading Volume279,720 sharesToday's Volume Vs. Average64% Short Selling IO Biotech? Sign up to receive the latest short interest report for IO Biotech and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartIOBT Short Interest Over TimeIOBT Days to Cover Over TimeIOBT Percentage of Float Shorted Over Time IO Biotech Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/2025167,500 shares $170.85 thousand +52.6%0.4%1 $1.02 4/30/2025109,800 shares $106.51 thousand -2.2%0.2%0.7 $0.97 4/15/2025112,300 shares $99.71 thousand -12.5%0.2%0.7 $0.89 3/31/2025128,300 shares $139.85 thousand +156.6%0.3%0.8 $1.09 3/15/202550,000 shares $43.94 thousand +54.8%0.1%0.3 $0.88 2/28/202532,300 shares $30.52 thousand +32.9%0.1%0.2 $0.95 2/15/202524,300 shares $22.63 thousand -31.0%0.1%0.1 $0.93 1/31/202535,200 shares $31.68 thousand -27.4%0.1%0.1 $0.90 1/15/202548,500 shares $38.32 thousand +6.8%0.1%0.1 $0.79 12/31/202445,400 shares $41.77 thousand -68.6%0.1%0.1 $0.92 Get the Latest News and Ratings for IOBT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for IO Biotech and its competitors with MarketBeat's FREE daily newsletter. 12/15/2024144,400 shares $116.96 thousand +210.5%0.3%0.4 $0.81 11/30/202446,500 shares $41.39 thousand -45.4%0.1%0.1 $0.89 11/15/202485,200 shares $69.86 thousand -57.6%0.2%0.1 $0.82 10/31/2024200,900 shares $249.12 thousand -27.5%0.5%0.4 $1.24 10/15/2024277,100 shares $329.75 thousand -12.7%0.6%0.7 $1.19 9/30/2024317,500 shares $333.38 thousand +160.0%0.7%0.7 $1.05 9/15/2024122,100 shares $91.70 thousand +136.2%0.3%0.3 $0.75 8/31/202451,700 shares $77.55 thousand -31.5%0.1%0.2 $1.50 8/15/202475,500 shares $101.93 thousand +56.6%0.2%0.5 $1.35 7/31/202448,200 shares $65.07 thousand -48.6%0.1%0.4 $1.35 7/15/202493,700 shares $129.31 thousand +3.3%0.2%0.7 $1.38 6/30/202490,700 shares $106.12 thousand -17.6%0.2%0.9 $1.17 6/15/2024110,100 shares $144.23 thousand +19.4%0.3%1 $1.31 5/31/202492,200 shares $108.80 thousand +129.4%0.2%0.9 $1.18 5/15/202440,200 shares $57.49 thousand +1.8%0.1%0.4 $1.43 4/30/202439,500 shares $57.67 thousand -36.1%0.1%0.3 $1.46 4/15/202461,800 shares $93.94 thousand -9.4%0.2%0.5 $1.52 3/31/202468,200 shares $117.99 thousand -16.4%0.2%0.5 $1.73 3/15/202481,600 shares $134.64 thousand +50.3%0.2%0.6 $1.65 2/29/202454,300 shares $86.88 thousand +10.4%0.1%0.4 $1.60 2/15/202449,200 shares $74.78 thousand +2.5%0.1%0.3 $1.52 1/31/202448,000 shares $83.52 thousand -30.9%0.1%0.5 $1.74 1/15/202469,500 shares $131.36 thousand -14.1%0.2%0.7 $1.89 12/31/202380,900 shares $152.09 thousand -56.4%0.2%0.6 $1.88 12/15/2023185,500 shares $262.48 thousand -7.7%0.5%1.5 $1.42 11/30/2023200,900 shares $235.05 thousand +17.0%0.6%1.3 $1.17 11/15/2023171,700 shares $168.27 thousand +3.5%0.5%1.2 $0.98 10/31/2023165,900 shares $142.16 thousand +26.9%0.9%1 $0.86 10/15/2023130,700 shares $150.31 thousand +12.4%0.7%0.8 $1.15 9/30/2023116,300 shares $163.98 thousand -57.2%0.7%0.9 $1.41Trump wipes out trillions overnight… (Ad)Is there anybody more powerful than Donald Trump right now? In a single tariff announcement, he wiped out nearly $5 trillion in wealth from the S&P 500 and $6.4 trillion from the Dow Jones… Not to mention the countless trillions of dollars lost in every market around the world… leaving the major political powers scrambling in fear of Trump’s next move.Whether you take some of that wealth for yourself depends on if you watch this controversial exposé 9/15/2023271,800 shares $385.96 thousand -57.0%1.5%2.1 $1.42 8/31/2023631,700 shares $1.16 million +15.5%3.6%3 $1.84 8/15/2023546,900 shares $1.09 million +29.9%3.1%2.7 $2.00 7/31/2023421,000 shares $774.64 thousand -5.9%2.1%2.4 $1.84 7/15/2023447,500 shares $796.55 thousand +5.7%2.3%2.8 $1.78 6/30/2023423,200 shares $829.47 thousand -11.2%2.2%2.7 $1.96 6/15/2023476,300 shares $976.42 thousand +11.9%2.4%3.2 $2.05 5/31/2023425,700 shares $885.46 thousand +36.3%2.2%13.2 $2.08 5/15/2023312,400 shares $624.80 thousand No Change1.7%11.2 $2.00 10/31/20229,400 shares $23.22 thousand +59.3%0.1%0.2 $2.47 10/15/20225,900 shares $14.04 thousand -14.5%0.0%0.1 $2.38 9/30/20226,900 shares $18.70 thousand -25.0%0.0%0.2 $2.71 9/15/20229,200 shares $26.68 thousand +13.6%0.1%0.2 $2.90 8/31/20228,100 shares $26.89 thousand +1,250.0%0.0%0.2 $3.32 8/15/2022600 shares $2.41 thousand -50.0%N/A0 $4.01 7/31/20221,200 shares $4.64 thousand -62.5%0.0%0 $3.87 7/15/20223,200 shares $13.44 thousand -74.2%0.0%0.1 $4.20 6/30/202212,400 shares $57.91 thousand +106.7%0.1%0.2 $4.67 6/15/20226,000 shares $23.64 thousand +106.9%0.0%0.1 $3.94 5/31/20222,900 shares $14.01 thousand -44.2%0.0%0.1 $4.83 5/15/20225,200 shares $39.16 thousand -50.0%0.0%0.1 $7.53 4/30/202210,400 shares $75.40 thousand -24.6%0.1%0.3 $7.25 4/15/202213,800 shares $99.22 thousand +68.3%0.1%0.5 $7.19 3/31/20228,200 shares $43.46 thousand -78.3%N/A0 $5.30 3/15/202237,700 shares $143.26 thousand +19.7%0.3%1.4 $3.80 2/28/202231,500 shares $226.17 thousand -20.1%0.2%0.8 $7.18 2/15/202239,400 shares $335.69 thousand -14.5%0.3%0.4 $8.52 1/31/202246,100 shares $394.16 thousand -28.5%0.3%0.4 $8.55 1/15/202264,500 shares $490.20 thousand -21.3%N/A0.4 $7.60 12/31/202181,900 shares $524.16 thousand No Change0.6%0.4 $6.40 IOBT Short Interest - Frequently Asked Questions What is IO Biotech's current short interest? Short interest is the volume of IO Biotech shares that have been sold short but have not yet been covered or closed out. As of May 15th, investors have sold 167,500 shares of IOBT short. 0.35% of IO Biotech's shares are currently sold short. Learn More on IO Biotech's current short interest. What is a good short interest ratio for IO Biotech? 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. IOBT shares currently have a short interest ratio of 1.0. Learn More on IO Biotech's short interest ratio. What is a good short interest percentage for IO Biotech? Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 0.35% of IO Biotech's floating shares are currently sold short. Is IO Biotech's short interest increasing or decreasing? IO Biotech saw a increase in short interest in May. As of May 15th, there was short interest totaling 167,500 shares, an increase of 52.6% from the previous total of 109,800 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. What is IO Biotech's float size? IO Biotech currently has issued a total of 65,881,000 shares. Some of IO Biotech's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. IO Biotech currently has a public float of 48,450,000 shares. How does IO Biotech's short interest compare to its competitors? 0.35% of IO Biotech's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to IO Biotech: Atyr PHARMA INC (14.73%), Ginkgo Bioworks Holdings, Inc. (30.71%), Sage Therapeutics, Inc. (9.09%), MeiraGTx Holdings plc (3.95%), COMPASS Pathways plc (7.78%), Humacyte, Inc. (24.14%), Mereo BioPharma Group plc (5.34%), Erasca, Inc. (13.07%), ABIVAX Société Anonyme (2.12%), Benitec Biopharma Inc. (1.90%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short IO Biotech stock? Short selling IOBT is an investing strategy that aims to generate trading profit from IO Biotech as its price is falling. IOBT shares are trading down $0.07 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 IO Biotech? A short squeeze for IO Biotech 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 IOBT, which in turn drives the price of the stock up even further. How often is IO Biotech's 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 IOBT, twice per month. The most recent reporting period available is May, 15 2025. 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