Moleculin Biotech (MBRX) Short Interest Ratio & Short Volume $0.67 -0.02 (-3.05%) As of 04:00 PM Eastern Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Moleculin Biotech Short Interest DataMoleculin Biotech (MBRX) has a short interest of 603,000 shares, representing 4.30% of the float (the number of shares available for trading by the public). This marks a -38.59% decrease 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 1.53 million shares to cover all short positions.Current Short Interest603,000 sharesPrevious Short Interest981,900 sharesChange Vs. Previous Month-38.59%Dollar Volume Sold Short$540.65 thousandShort Interest Ratio1.0 Days to CoverLast Record DateMay 31, 2025Outstanding Shares14,127,000 sharesFloat Size14,010,000 sharesShort Percent of Float4.30%Today's Trading Volume494,907 sharesAverage Trading Volume1,529,112 sharesToday's Volume Vs. Average32% Short Selling Moleculin Biotech? Sign up to receive the latest short interest report for Moleculin 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 ChartMBRX Short Interest Over TimeMBRX Days to Cover Over TimeMBRX Percentage of Float Shorted Over Time Moleculin 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 5/31/2025603,000 shares $540.65 thousand -38.6%4.3%1 $0.90 5/15/2025981,900 shares $895.39 thousand +35.4%7.0%0.7 $0.91 4/30/2025725,100 shares $768.61 thousand +55.9%5.2%0.1 $1.06 4/15/2025465,200 shares $394.95 thousand -18.7%3.3%0.1 $0.85 3/31/2025572,100 shares $554.94 thousand +23.4%4.1%0.1 $0.97 3/15/2025463,600 shares $523.87 thousand -57.1%3.3%0.1 $1.13 2/28/20251,080,000 shares $1.39 million -50.9%8.4%0.2 $1.29 2/15/20252,200,000 shares $4.80 million +1,169.5%54.6%0.4 $2.18 1/31/2025173,300 shares $261.68 thousand +2.0%5.3%1.3 $1.51 1/15/2025169,900 shares $307.52 thousand +106.9%5.5%3.2 $1.81 Get the Latest News and Ratings for MBRX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Moleculin Biotech and its competitors with MarketBeat's FREE daily newsletter. 12/31/202482,100 shares $139.57 thousand +139.4%2.7%1.6 $1.70 12/15/202434,300 shares $79.58 thousand +65.7%1.1%0.7 $2.32 11/30/202420,700 shares $57.34 thousand -61.7%0.7%0.5 $2.77 11/15/202454,100 shares $146.61 thousand -55.8%1.9%1.3 $2.71 10/31/2024122,400 shares $318.24 thousand -28.6%4.5%3.8 $2.60 10/15/2024171,500 shares $399.60 thousand +0.4%6.3%4.2 $2.33 9/30/2024170,900 shares $485.36 thousand +36.5%6.2%4.3 $2.84 9/15/2024125,200 shares $304.24 thousand +17.0%4.6%3.4 $2.43 8/31/2024107,000 shares $272.85 thousand +108.6%3.9%3.3 $2.55 8/15/202451,300 shares $114.40 thousand +83.9%1.9%1.6 $2.23 7/31/202427,900 shares $87.89 thousand +30.4%1.1%1 $3.15 7/15/202421,400 shares $90.31 thousand -28.7%1.0%1 $4.22 6/30/202430,000 shares $105.60 thousand +31.0%1.4%1.4 $3.52 6/15/202422,900 shares $94.81 thousand +8.5%1.0%0.6 $4.14 5/31/202421,100 shares $100.65 thousand -38.3%1.0%0.5 $4.77 5/15/202434,200 shares $168.26 thousand +10.0%1.5%0.9 $4.92 4/30/202431,100 shares $156.12 thousand +16.5%1.5%0.8 $5.02 4/15/202426,700 shares $119.08 thousand -40.7%1.2%0.8 $4.46 3/31/202445,000 shares $265.95 thousand +2,042.9%2.1%1.4 $5.91 3/15/20242,100 shares $15.58 thousand -98.4%0.1%0.1 $7.42 2/29/2024134,400 shares $84.54 thousand -2.4%N/A0.8 $0.63 2/15/2024137,700 shares $68.85 thousand -37.4%N/A0.9 $0.50 1/31/2024220,000 shares $110.88 thousand -8.5%N/A1.2 $0.50 1/15/2024240,300 shares $170.61 thousand -23.8%N/A1.3 $0.71 12/31/2023315,300 shares $270.65 thousand -7.5%N/A1.6 $0.86 12/15/2023340,800 shares $197.66 thousand +35.3%N/A2.1 $0.58 11/30/2023251,900 shares $150.81 thousand -15.2%N/A1.7 $0.60 11/15/2023296,900 shares $169.23 thousand +59.7%N/A1.9 $0.57 10/31/2023185,900 shares $90.01 thousand +131.8%N/A1.5 $0.48 10/15/202380,200 shares $36.09 thousand -55.3%N/A0.7 $0.45Gold is soaring. Here’s how to get paid from it (Ad)Gold just broke through $3,300… And while the headlines shout about price targets, something even more powerful is happening behind the scenes… Some investors are using a little-known ETF to collect up to $1,152/month from gold's surge. No trading gold futures. No mining stocks. No vaults. Just a simple fund delivering monthly payouts — like clockwork.Click here to discover the income ETF behind it all. 9/30/2023179,300 shares $76.65 thousand +260.0%N/A1.2 $0.43 9/15/202349,800 shares $19.77 thousand +30.7%N/A0.3 $0.40 8/31/202338,100 shares $21.34 thousand -75.4%N/A0.2 $0.56 8/15/2023155,100 shares $94.46 thousand +15.6%N/A1 $0.61 7/31/2023134,200 shares $84.98 thousand +42.6%N/A0.7 $0.63 7/15/202394,100 shares $59.28 thousand -20.8%N/A0.5 $0.63 6/30/2023118,800 shares $68.76 thousand +611.4%N/A0.4 $0.58 6/15/202316,700 shares $9.85 thousand +108.8%N/A0.1 $0.59 5/31/20238,000 shares $5.07 thousand -59.4%N/A0 $0.63 5/15/202319,700 shares $12.14 thousand +20.9%N/A0.1 $0.62 4/30/202316,300 shares $12.18 thousand -30.3%0.1%0.1 $0.75 4/15/202323,400 shares $21.29 thousand -14.6%0.1%0.1 $0.91 3/31/202327,400 shares $26.30 thousand -26.3%0.1%0.4 $0.96 3/15/202337,200 shares $35.34 thousand -13.9%0.1%0.5 $0.95 2/28/202343,200 shares $52.27 thousand -30.1%0.2%0.5 $1.21 2/15/202361,800 shares $80.34 thousand +56.9%0.2%0.7 $1.30 1/31/202339,400 shares $49.64 thousand -49.0%0.1%0.4 $1.26 1/15/202377,200 shares $100.36 thousand -34.9%0.3%0.8 $1.30 12/30/2022118,600 shares $125.72 thousand +48.3%0.4%1.2 $1.06 12/15/202280,000 shares $110.40 thousand -9.7%0.3%0.8 $1.38 11/30/202288,600 shares $127.58 thousand +30.3%0.3%0.9 $1.44 11/15/202268,000 shares $64.59 thousand +32.0%0.2%0.6 $0.95 10/31/202251,500 shares $51.50 thousand -9.8%0.2%0.5 $1.00 10/15/202257,100 shares $57.10 thousand -5.3%0.2%0.6 $1.00 9/30/202260,300 shares $63.92 thousand -36.4%0.2%0.6 $1.06 9/15/202294,800 shares $134.62 thousand -40.0%0.3%1 $1.42 8/31/2022158,100 shares $233.99 thousand +59.2%0.6%2 $1.48 8/15/202299,300 shares $178.74 thousand +85.6%0.4%2 $1.80 7/31/202253,500 shares $90.42 thousand -54.7%0.2%1 $1.69 7/15/2022118,200 shares $195.47 thousand +25.5%0.4%2 $1.65 6/30/202294,200 shares $136.59 thousand -37.9%0.3%1.4 $1.45 6/15/2022151,600 shares $210.72 thousand -39.0%0.5%1.9 $1.39 5/31/2022248,500 shares $372.75 thousand +31.0%0.9%2.9 $1.50 5/15/2022189,700 shares $235.23 thousand -37.0%0.7%1.9 $1.24 4/30/2022301,000 shares $478.59 thousand -28.0%1.1%2.8 $1.59 4/15/2022418,300 shares $836.60 thousand +0.6%1.5%3.5 $2.00 3/31/2022415,900 shares $740.30 thousand -4.7%1.5%3.4 $1.78 3/15/2022436,400 shares $554.23 thousand -9.6%1.6%2.4 $1.27 2/28/2022482,500 shares $670.68 thousand +9.2%1.8%2.4 $1.39 2/15/2022441,900 shares $645.17 thousand -9.9%1.7%1.8 $1.46 1/31/2022490,200 shares $740.20 thousand -7.8%1.8%1.9 $1.51 1/15/2022531,600 shares $909.04 thousand +2.0%2.0%1.9 $1.71 12/31/2021521,100 shares $969.25 thousand -11.0%1.9%1.8 $1.86 12/15/2021585,400 shares $1.22 million +2.2%2.2%2.3 $2.08 11/30/2021572,600 shares $1.19 million -8.7%2.1%2.4 $2.07 11/15/2021626,800 shares $1.49 million -3.3%2.3%3.2 $2.38 10/29/2021648,000 shares $1.71 million -6.1%2.4%3.5 $2.64 10/15/2021690,400 shares $1.87 million +3.6%2.6%4 $2.71 9/30/2021666,700 shares $2.00 million -6.3%2.5%3.8 $3.00 9/15/2021711,400 shares $2.07 million -5.6%2.7%3.7 $2.91Gold is soaring. Here’s how to get paid from it (Ad)Gold just broke through $3,300… And while the headlines shout about price targets, something even more powerful is happening behind the scenes… Some investors are using a little-known ETF to collect up to $1,152/month from gold's surge. No trading gold futures. No mining stocks. No vaults. Just a simple fund delivering monthly payouts — like clockwork.Click here to discover the income ETF behind it all. 8/31/2021753,900 shares $2.32 million +5.4%2.8%3.5 $3.08 8/13/2021715,200 shares $2.12 million -7.3%2.7%2.9 $2.97 7/30/2021771,800 shares $2.41 million -18.8%2.9%2.9 $3.12 7/15/2021949,900 shares $3.25 million -1.0%3.6%3.3 $3.42 6/30/2021959,300 shares $3.52 million +17.8%3.6%1.7 $3.67 6/15/2021814,600 shares $3.08 million -13.8%3.1%0.7 $3.78 5/28/2021944,700 shares $3.50 million -14.9%3.5%0.8 $3.70 5/14/20211,110,000 shares $3.63 million -4.3%4.2%0.9 $3.27 4/30/20211,160,000 shares $4.21 million +26.7%4.4%0.7 $3.63 4/15/2021915,500 shares $3.38 million +78.0%3.4%0.3 $3.69 3/31/2021514,200 shares $2.19 million +70.9%1.9%0.2 $4.25 3/15/2021300,800 shares $1.34 million -50.1%1.1%0.1 $4.44 2/26/2021602,500 shares $2.62 million +44.7%2.6%0.3 $4.35 2/12/2021416,500 shares $2.23 million -84.9%1.8%0.2 $5.36 1/29/20212,760,000 shares $16.06 million +8.2%12.6%1.4 $5.82 1/15/20212,550,000 shares $15.45 million +4.9%N/A1 $6.06 12/31/20202,430,000 shares $12.17 million +4.7%N/A1.2 $5.01 12/15/20202,320,000 shares $10.75 million -0.4%N/A1.6 $4.63 11/30/20202,330,000 shares $10.82 million -7.2%N/A1.7 $4.64 11/15/20202,510,000 shares $11.58 million -3.5%N/A5 $4.61 10/30/20202,600,000 shares $11.23 million -11.3%N/A4.9 $4.32 10/15/20202,930,000 shares $14.29 million -5.5%N/A4.1 $4.88 9/30/20203,100,000 shares $15.12 million +2.0%N/A1 $4.88 9/15/20203,040,000 shares $14.85 million -10.3%N/A1 $4.88 8/31/20203,390,000 shares $17.83 million -7.6%N/A1.1 $5.26 8/14/20203,670,000 shares $21.58 million -5.4%N/A1.1 $5.88 7/31/20203,880,000 shares $26.77 million +19.0%N/A1.2 $6.90 7/15/20203,260,000 shares $20.93 million -11.7%N/A1 $6.42 6/30/20203,690,000 shares $21.43 million -13.2%N/A0.7 $5.81 6/15/20204,250,000 shares $28.56 million -3.2%N/A0.8 $6.72 MBRX Short Interest - Frequently Asked Questions What is Moleculin Biotech's current short interest? Short interest is the volume of Moleculin Biotech shares that have been sold short but have not yet been covered or closed out. As of May 31st, traders have sold 603,000 shares of MBRX short. 4.30% of Moleculin Biotech's shares are currently sold short. Learn More on Moleculin Biotech's current short interest. What is a good short interest ratio for Moleculin 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. MBRX shares currently have a short interest ratio of 1.0. Learn More on Moleculin Biotech's short interest ratio. What is a good short interest percentage for Moleculin 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. 4.30% of Moleculin Biotech's floating shares are currently sold short. Is Moleculin Biotech's short interest increasing or decreasing? Moleculin Biotech saw a decrease in short interest during the month of May. As of May 31st, there was short interest totaling 603,000 shares, a decrease of 38.6% from the previous total of 981,900 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 Moleculin Biotech's float size? Moleculin Biotech currently has issued a total of 14,127,000 shares. Some of Moleculin 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. Moleculin Biotech currently has a public float of 14,010,000 shares. How does Moleculin Biotech's short interest compare to its competitors? 4.30% of Moleculin Biotech's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Moleculin Biotech: FibroBiologics, Inc. (4.21%), Karyopharm Therapeutics Inc. (26.01%), Lantern Pharma Inc. (3.28%), Xilio Therapeutics, Inc. (4.82%), Estrella Immunopharma, Inc. (0.11%), LAVA Therapeutics (0.54%), Pluri Inc. (0.82%), SCYNEXIS, Inc. (1.74%), Rani Therapeutics Holdings, Inc. (13.65%), Tempest Therapeutics, Inc. (3.30%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($64.96 billion), Invesco QQQ ($27.88 billion), iShares Russell 2000 ETF ($19.94 billion), iShares 20+ Year Treasury Bond ETF ($9.69 billion), Strategy Incorporated ($8.58 billion), SPDR S&P Biotech ETF ($5.72 billion), Invesco S&P 500 Equal Weight ETF ($5.45 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.70 billion), Charter Communications, Inc. ($4.54 billion), and Industrial Select Sector SPDR Fund ($4.49 billion). View all of the most shorted stocks. What does it mean to sell short Moleculin Biotech stock? Short selling MBRX is an investing strategy that aims to generate trading profit from Moleculin Biotech as its price is falling. MBRX shares are trading down $0.02 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 Moleculin Biotech? A short squeeze for Moleculin 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 MBRX, which in turn drives the price of the stock up even further. How often is Moleculin 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 MBRX, twice per month. The most recent reporting period available is May, 31 2025. More Short Interest Resources from MarketBeat Related Companies FibroBiologics Short Squeeze Karyopharm Therapeutics Short Squeeze Lantern Pharma Short Squeeze Xilio Therapeutics Short Squeeze Estrella Immunopharma Short Squeeze LAVA Therapeutics Short Squeeze Pluri Short Squeeze SCYNEXIS Short Squeeze Rani Therapeutics Short Squeeze Tempest Therapeutics Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:MBRX) was last updated on 6/12/2025 by MarketBeat.com Staff From Our PartnersTrump’s Exec Order #14154 could be a “Millionaire-Maker”Former Presidential Advisor, Jim Rickards, says Trump could “rewire our economy and hand millions of Americans...Paradigm Press | SponsoredTrump wipes out trillions overnight…Is there anybody more powerful than Donald Trump right now? 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