Opthea (OPT) Short Interest Ratio & Short Volume $3.41 +0.23 (+7.23%) As of 08/14/2025 Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsFDA EventsFinancialsHeadlinesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Opthea Short Interest DataOpthea (OPT) has a short interest of 533,800 shares, representing 0.36% of the float (the number of shares available for trading by the public). This marks a 2.22% increase in short interest from the previous month. The short interest ratio (days to cover) is 18.0, indicating that it would take 18.0 days of the average trading volume of 0 shares to cover all short positions.Current Short Interest533,800 sharesPrevious Short Interest522,200 sharesChange Vs. Previous Month+2.22%Dollar Volume Sold Short$1.82 millionShort Interest Ratio18.0 Days to CoverLast Record DateMarch 31, 2025Outstanding Shares153,910,000 sharesShort Percent of Float0.36%Today's Trading Volume3,000 sharesAverage Trading Volume0 sharesToday's Volume Vs. Average∞ Short Selling Opthea? Sign up to receive the latest short interest report for Opthea and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartOPT Short Interest Over TimeOPT Days to Cover Over TimeOPT Percentage of Float Shorted Over Time Opthea Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 3/31/2025533,800 shares $1.82 million +2.2%0.4%18 $3.41 3/15/2025522,200 shares $1.66 million +20.7%0.4%16.5 $3.18 2/28/2025432,800 shares $1.94 million +2.3%0.3%14 $4.48 2/15/2025422,900 shares $2.20 million +0.7%0.3%17.1 $5.21 1/31/2025420,100 shares $2.34 million +196.9%N/A14.6 $5.56 1/15/2025141,500 shares $507.99 thousand +113.1%N/A5.2 $3.59 12/31/202466,400 shares $260.95 thousand -2.6%N/A2.8 $3.93 12/15/202468,200 shares $221.65 thousand -5.2%N/A2.4 $3.25 11/30/202471,900 shares $265.31 thousand +9.6%N/A2.4 $3.69 11/15/202465,600 shares $215.17 thousand -10.9%N/A2.2 $3.28 Get the Latest News and Ratings for OPT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Opthea and its competitors with MarketBeat's FREE daily newsletter. 10/31/202473,600 shares $320.90 thousand +2.7%N/A3 $4.36 10/15/202471,700 shares $352.05 thousand +10.0%N/A3.1 $4.91 9/30/202465,200 shares $265.36 thousand -6.9%N/A3.2 $4.07 9/15/202470,000 shares $220.52 thousand -2.0%N/A4.3 $3.15 8/31/202471,400 shares $220.31 thousand +2.4%N/A4.4 $3.09 8/15/202469,700 shares $167.98 thousand -6.9%N/A3.8 $2.41 7/31/202474,900 shares $170.02 thousand -4.7%N/A3.1 $2.27 7/15/202478,600 shares $164.27 thousand -4.4%N/A3.4 $2.09 6/30/202482,200 shares $158.65 thousand +19.1%N/A3.7 $1.93 6/15/202469,000 shares $134.90 thousand -3.1%N/A3.1 $1.96 5/31/202471,200 shares $202.21 thousand -35.2%N/A3.4 $2.84 5/15/2024109,800 shares $393.08 thousand -13.2%N/A4.9 $3.58 4/30/2024126,500 shares $433.90 thousand +3.2%N/A5.8 $3.43 4/15/2024122,600 shares $436.46 thousand -3.7%N/A5.6 $3.56 3/31/2024127,300 shares $523.20 thousand -5.8%N/A4.9 $4.11 3/15/2024135,100 shares $466.10 thousand +8.9%N/A3.4 $3.45 2/29/2024124,100 shares $434.35 thousand -21.1%N/A3.4 $3.50 2/15/2024157,200 shares $452.74 thousand +26.4%N/A4.4 $2.88 1/31/2024124,400 shares $337.12 thousand +8.2%N/A4 $2.71 1/15/2024115,000 shares $332.35 thousand -23.5%N/A4.4 $2.89 12/31/2023150,300 shares $443.39 thousand +70.4%N/A6.8 $2.95 12/15/202388,200 shares $222.26 thousand -4.2%N/A4.7 $2.52 11/30/202392,100 shares $236.70 thousand +2.6%N/A9.6 $2.57 11/15/202389,800 shares $154.46 thousand -0.8%N/A7.4 $1.72 10/31/202390,500 shares $152.49 thousand -14.0%N/A7.1 $1.69 10/15/2023105,200 shares $190.94 thousand +1.4%N/A8 $1.82 9/30/2023103,800 shares $180.82 thousand -1.2%N/A8 $1.74 9/15/2023105,100 shares $218.61 thousand -7.2%N/A8.1 $2.08 8/31/2023113,200 shares $266.02 thousand +38.7%N/A10.1 $2.35 8/15/202381,600 shares $236.64 thousand +1.9%N/A10.5 $2.90Trump's New Plan to “Make China Pay” (Ad)Trump's AI Masterplan Could Crush China The White House just unleashed would could be the most aggressive economic move in U.S. history - and I don't mean Trump's tariff wars. Instead, I'm talking about a government-wide mandate that could send U.S. tech stocks – especially AI stocks – soaring... while this same masterplan crushes the competition in China. You'll want to get in before the plan goes live on Sept. 30.Watch this free video for details. 7/31/202380,100 shares $250.71 thousand +0.8%N/A10.3 $3.13 7/15/202379,500 shares $258.38 thousand +4.3%N/A9.9 $3.25 6/30/202376,200 shares $213.36 thousand -8.7%N/A8.9 $2.80 6/15/202383,500 shares $263.03 thousand +8.2%N/A7.9 $3.15 5/31/202377,200 shares $240.09 thousand +0.3%N/A9.4 $3.11 5/15/202377,000 shares $280.28 thousand +6.7%N/A8.9 $3.64 4/30/202372,200 shares $304.32 thousand -2.3%N/A9.8 $4.22 4/15/202373,900 shares $245.35 thousand -6.6%N/A11.4 $3.32 3/31/202379,100 shares $312.45 thousand +3.4%N/A14.9 $3.95 3/15/202376,500 shares $373.32 thousand +3.7%N/A36.4 $4.88 2/28/202373,800 shares $333.95 thousand +0.8%N/A36.9 $4.53 2/15/202373,200 shares $359.41 thousand -1.1%N/A45.8 $4.91 1/31/202374,000 shares $412.18 thousand -2.3%N/A74 $5.57 1/15/202375,700 shares $375.36 thousand -3.6%N/A108.1 $4.96 12/30/202278,500 shares $420.76 thousand +2.2%N/A98.1 $5.36 12/15/202276,800 shares $396.46 thousand -3.4%N/A69.8 $5.16 11/30/202279,500 shares $397.50 thousand -1.1%N/A72.3 $5.00 11/15/202280,400 shares $439.67 thousand -5.4%N/A40.2 $5.47 10/31/202285,000 shares $414.80 thousand -1.4%N/A38.6 $4.88 10/15/202286,200 shares $391.96 thousand -2.2%N/A39.2 $4.55 9/30/202288,100 shares $546.22 thousand +3.2%N/A38.3 $6.20 9/15/202285,400 shares $495.32 thousand +5.7%N/A37.1 $5.80 8/31/202280,800 shares $492.88 thousand -1.1%N/A31.1 $6.10 8/15/202281,700 shares $564.55 thousand -0.7%N/A26.4 $6.91 7/31/202282,300 shares $559.64 thousand -2.5%N/A24.9 $6.80 7/15/202284,400 shares $539.74 thousand +8.2%N/A22.8 $6.40 6/30/202278,000 shares $491.40 thousand +5.8%N/A21.7 $6.30 6/15/202273,700 shares $405.35 thousand -4.8%N/A18.4 $5.50 5/31/202277,400 shares $602.17 thousand +48.3%N/A17.6 $7.78 5/15/202252,200 shares $338.26 thousand -4.4%N/A12.4 $6.48 4/30/202254,600 shares $315.04 thousand +4.2%N/A14.4 $5.77 4/15/202252,400 shares $311.79 thousand -1.0%N/A9.9 $5.95 3/31/202252,900 shares $344.91 thousand +41.8%N/A9.4 $6.52 3/15/202237,300 shares $190.23 thousand -14.7%N/A6.4 $5.10 2/28/202243,700 shares $246.91 thousand -4.0%N/A6.9 $5.65 2/15/202245,500 shares $283.92 thousand -38.4%N/A7 $6.24 1/31/202273,900 shares $485.52 thousand -87.2%N/A9.2 $6.57 1/15/2022576,800 shares $4.35 million +704.5%N/A88.7 $7.55 12/31/202171,700 shares $541.34 thousand -10.8%N/A9.4 $7.55 12/15/202180,400 shares $567.62 thousand -19.1%N/A9.6 $7.06 11/30/202199,400 shares $654.05 thousand -4.3%N/A11.6 $6.58 11/15/2021103,900 shares $748.08 thousand +6.7%N/A10.1 $7.20 10/29/202197,400 shares $735.37 thousand -36.8%N/A7.9 $7.55 10/15/2021154,000 shares $1.19 million +15.1%N/A10.3 $7.72 9/30/2021133,800 shares $1.07 million -5.6%N/A8 $8.00 9/15/2021141,700 shares $1.09 million +4.1%N/A6.8 $7.70 8/31/2021136,100 shares $1.02 million -0.4%N/A1.2 $7.51 8/13/2021136,600 shares $980.79 thousand +11.2%N/A1.2 $7.18 7/30/2021122,800 shares $808.02 thousand -18.8%N/A1.1 $6.58 7/15/2021151,300 shares $1.13 million -0.3%N/A1.4 $7.49Trump's New Plan to “Make China Pay” (Ad)Trump's AI Masterplan Could Crush China The White House just unleashed would could be the most aggressive economic move in U.S. history - and I don't mean Trump's tariff wars. Instead, I'm talking about a government-wide mandate that could send U.S. tech stocks – especially AI stocks – soaring... while this same masterplan crushes the competition in China. You'll want to get in before the plan goes live on Sept. 30.Watch this free video for details. 6/30/2021151,800 shares $1.21 million +95.9%N/A1.4 $7.94 6/15/202177,500 shares $666.50 thousand -8.5%N/A0.8 $8.60 5/28/202184,700 shares $775.01 thousand +20.5%N/A12.6 $9.15 5/14/202170,300 shares $564.51 thousand -0.1%N/A7.9 $8.03 4/30/202170,400 shares $649.79 thousand -0.7%N/A7.3 $9.23 4/15/202170,900 shares $684.19 thousand +10.3%N/A5.7 $9.65 3/31/202164,300 shares $572.27 thousand -15.5%N/A5 $8.90 3/15/202176,100 shares $747.30 thousand +61.2%N/A5.3 $9.82 2/26/202147,200 shares $472.47 thousand +128.0%N/A2.6 $10.01 2/12/202120,700 shares $234.12 thousand -47.5%N/A1.2 $11.31 1/29/202139,400 shares $470.83 thousand +6.2%N/A2.2 $11.95 1/15/202137,100 shares $473.40 thousand No ChangeN/A1.6 $12.76 OPT Short Interest - Frequently Asked Questions What is Opthea's current short interest? Short interest is the volume of Opthea shares that have been sold short but have not yet been closed out or covered. As of March 31st, traders have sold 533,800 shares of OPT short. 0.36% of Opthea's shares are currently sold short. Learn More on Opthea's current short interest. What is a good short interest ratio for Opthea? 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. OPT shares currently have a short interest ratio of 18.0. Learn More on Opthea's short interest ratio. What is a good short interest percentage for Opthea? 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. 0.36% of Opthea's floating shares are currently sold short. Is Opthea's short interest increasing or decreasing? Opthea saw a increase in short interest during the month of March. As of March 31st, there was short interest totaling 533,800 shares, an increase of 2.2% from the previous total of 522,200 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 Opthea's short interest compare to its competitors? 0.36% of Opthea's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Opthea: Belite Bio, Inc. Sponsored ADR (0.61%), ImmunityBio, Inc. (35.13%), Disc Medicine, Inc. (10.66%), Agios Pharmaceuticals, Inc. (7.38%), Twist Bioscience Corporation (17.83%), CG Oncology, Inc. (24.51%), Harmony Biosciences Holdings, Inc. (9.66%), Denali Therapeutics Inc. (10.21%), Mesoblast Limited (2.29%), Ocular Therapeutix, Inc. (7.55%), 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 ($21.93 billion), iShares 20+ Year Treasury Bond ETF ($9.31 billion), MicroStrategy Incorporated ($8.42 billion), Charter Communications, Inc. ($4.52 billion), Apollo Global Management Inc. ($4.26 billion), Super Micro Computer, Inc. ($3.98 billion), Capital One Financial Corporation ($3.79 billion), TC Energy Corporation ($3.43 billion), AppLovin Corporation ($2.91 billion), and Schlumberger Limited ($2.89 billion). View all of the most shorted stocks. What does it mean to sell short Opthea stock? Short selling OPT is an investing strategy that aims to generate trading profit from Opthea as its price is falling. OPT shares are trading up $0.23 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 Opthea? A short squeeze for Opthea 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 OPT, which in turn drives the price of the stock up even further. How often is Opthea'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 OPT, twice per month. The most recent reporting period available is March, 31 2025. 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