Mustang Bio (MBIO) Short Interest Ratio & Short Volume $1.57 +0.06 (+3.97%) Closing price 08/5/2025 04:00 PM EasternExtended Trading$1.55 -0.02 (-1.27%) As of 09:14 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 AnalysisChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Mustang Bio Short Interest DataMustang Bio (MBIO) has a short interest of 369,000 shares, representing 11.71% of the float (the number of shares available for trading by the public). This marks a 33,445.45% increase in short interest from the previous month. The short interest ratio (days to cover) is 0.1, indicating that it would take 0.1 days of the average trading volume of 2.32 million shares to cover all short positions.Current Short Interest369,000 sharesPrevious Short Interest1,100 sharesChange Vs. Previous Month+33,445.45%Dollar Volume Sold Short$881.91 thousandShort Interest Ratio0.1 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares4,380,000 sharesFloat Size3,150,000 sharesShort Percent of Float11.71%Today's Trading Volume108,509 sharesAverage Trading Volume2,317,333 sharesToday's Volume Vs. Average5% Short Selling Mustang Bio? Sign up to receive the latest short interest report for Mustang Bio and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartMBIO Short Interest Over TimeMBIO Days to Cover Over TimeMBIO Percentage of Float Shorted Over Time Mustang Bio Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/15/2025369,000 shares $881.91 thousand +33,445.5%11.7%0.1 $2.39 6/30/20251,100 shares $1.05 thousand -71.8%0.0%0 $0.96 6/15/20253,900 shares $4.56 thousand -96.0%0.1%0 $1.17 5/31/202597,100 shares $126.23 thousand +65.1%3.3%0.2 $1.30 5/15/202558,800 shares $66.44 thousand -70.5%1.9%0.1 $1.13 4/30/2025199,300 shares $217.24 thousand +228.3%10.2%0.5 $1.09 4/15/202560,700 shares $82.55 thousand +0.5%3.1%0.1 $1.36 3/31/202560,400 shares $75.50 thousand +37.3%3.1%0.3 $1.25 3/15/202544,000 shares $62.04 thousand -52.0%2.8%0.1 $1.41 2/28/202591,700 shares $183.40 thousand -22.4%6.4%0.3 $2.00 Get the Latest News and Ratings for MBIO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Mustang Bio and its competitors with MarketBeat's FREE daily newsletter. 2/15/2025118,200 shares $330.96 thousand -7.0%8.2%0.4 $2.80 1/31/2025127,100 shares $549.07 thousand +243.5%11.4%0.5 $4.32 1/15/202537,000 shares $232.36 thousand -89.5%3.3%0.2 $6.28 12/31/2024353,500 shares $62.57 thousand -4.7%0.9%0 $0.18 12/15/2024371,100 shares $71.73 thousand +46.5%0.8%0.2 $0.19 11/30/2024253,400 shares $50.68 thousand -40.4%0.6%0.1 $0.20 11/15/2024424,900 shares $97.00 thousand -20.5%1.0%0.2 $0.23 10/31/2024534,200 shares $149.58 thousand +6.4%1.6%0.3 $0.28 10/15/2024502,000 shares $109.59 thousand +31.4%1.5%0.3 $0.22 9/30/2024382,100 shares $89.91 thousand -41.8%1.1%0.3 $0.24 9/15/2024656,400 shares $177.23 thousand +1.3%2.0%0.2 $0.27 8/31/2024647,700 shares $182.13 thousand -60.0%1.9%0 $0.28 8/15/20241,620,000 shares $607.99 thousand +50.0%4.8%0.1 $0.38 7/31/20241,080,000 shares $362.66 thousand -15.0%3.4%0 $0.34 7/15/20241,270,000 shares $502.92 thousand -57.1%4.0%0 $0.40 6/30/20242,960,000 shares $1.40 million +334.7%9.4%0.1 $0.47 6/15/2024681,000 shares $88.53 thousand -70.8%3.0%0 $0.13 5/31/20242,330,000 shares $468.80 thousand +842.6%10.9%0.7 $0.20 5/15/2024247,200 shares $68.47 thousand +200.7%2.7%0.2 $0.28 4/30/202482,200 shares $20.39 thousand -39.8%0.9%0.3 $0.25 4/15/2024136,500 shares $51.19 thousand -23.3%1.8%0.7 $0.38 3/31/2024178,000 shares $185.12 thousand -54.2%2.4%1.2 $1.04 3/15/2024389,000 shares $369.55 thousand +828.4%5.1%2.7 $0.95 2/29/202441,900 shares $56.57 thousand -1.9%0.6%0.3 $1.35 2/15/202442,700 shares $55.94 thousand -15.6%0.6%0.8 $1.31 1/31/202450,600 shares $72.86 thousand +58.6%0.7%0.8 $1.44 1/15/202431,900 shares $46.57 thousand -53.0%0.4%0.3 $1.46 12/31/202367,800 shares $91.53 thousand -18.2%1.0%0.7 $1.35 12/15/202382,900 shares $114.40 thousand -4.5%1.2%0.8 $1.38 11/30/202386,800 shares $124.99 thousand +15.9%1.4%1 $1.44Elon’s BIGGEST warning yet? (Ad)Tesla's About to Prove Everyone Wrong... Again Back in 2018, when Jeff Brown told everyone to buy Tesla… The "experts" said Elon was finished and Tesla was headed for bankruptcy. Now they're saying the same thing, but Jeff has uncovered Tesla's next breakthrough.Click here to see why Tesla's about to prove everyone wrong... again. 11/15/202374,900 shares $121.34 thousand -59.9%1.2%1 $1.62 10/31/2023186,700 shares $306.19 thousand +571.6%2.7%2.5 $1.64 10/15/202327,800 shares $46.43 thousand -53.0%0.5%1.1 $1.67 9/30/202359,200 shares $122.54 thousand +166.7%1.1%2.2 $2.07 9/15/202322,200 shares $55.94 thousand -59.9%0.4%0.7 $2.52 8/31/202355,400 shares $175.62 thousand +60.1%1.0%1.3 $3.17 8/15/202334,600 shares $131.48 thousand -19.9%0.6%0.7 $3.80 7/31/202343,200 shares $224.64 thousand -45.2%0.8%0.9 $5.20 7/15/202378,800 shares $409.76 thousand +47.3%1.5%1.4 $5.20 6/30/202353,500 shares $332.24 thousand -19.3%1.0%0.8 $6.21 6/15/202366,300 shares $484.65 thousand +10.3%1.2%0.9 $7.31 5/31/202360,100 shares $384.04 thousand -38.2%1.1%1 $6.39 5/15/202397,200 shares $422.82 thousand -34.7%1.8%1.9 $4.35 4/30/2023148,900 shares $631.34 thousand +30.6%2.6%3.1 $4.24 4/15/2023114,000 shares $386.46 thousand +850.0%2.0%2.5 $3.39 3/31/202312,000 shares $65.99 thousand -91.7%0.2%0.3 $5.50 3/15/2023144,400 shares $57.53 thousand -45.3%0.2%0.3 $0.40 2/28/2023264,000 shares $145.20 thousand +3.9%0.3%0.5 $0.55 2/15/2023254,200 shares $170.29 thousand -13.0%0.3%0.5 $0.67 1/31/2023292,000 shares $197.86 thousand -8.5%0.4%0.6 $0.68 1/15/2023319,000 shares $202.47 thousand -23.6%0.4%0.6 $0.63 12/30/2022417,700 shares $164.95 thousand +4.4%0.5%0.9 $0.39 12/15/2022400,000 shares $151.20 thousand +61.4%0.5%1.1 $0.38 11/30/2022247,900 shares $125.19 thousand -55.6%0.3%0.7 $0.51 11/15/2022558,300 shares $267.20 thousand -5.7%0.7%1.7 $0.48 10/31/2022591,800 shares $320.52 thousand +33.1%0.7%1.5 $0.54 10/15/2022444,800 shares $208.83 thousand -41.7%0.5%0.8 $0.47 9/30/2022762,400 shares $357.87 thousand +4.1%0.9%1.4 $0.47 9/15/2022732,100 shares $427.77 thousand +2.4%0.9%1 $0.58 8/31/2022714,800 shares $434.24 thousand +25.2%N/A0.8 $0.61 8/15/2022570,900 shares $428.12 thousand -44.6%0.7%0.6 $0.75 7/31/20221,030,000 shares $597.40 thousand +14.6%1.2%1 $0.58 7/15/2022899,000 shares $557.38 thousand -22.5%1.1%0.9 $0.62 6/30/20221,160,000 shares $678.60 thousand -69.6%1.4%1.1 $0.59 6/15/20223,810,000 shares $2.30 million -10.4%4.5%3.4 $0.60 5/31/20224,250,000 shares $2.74 million +9.0%5.0%4.8 $0.65 5/15/20223,900,000 shares $2.70 million +3.2%4.6%4.5 $0.69 4/30/20223,780,000 shares $2.81 million +15.6%4.5%4.1 $0.74 4/15/20223,270,000 shares $2.81 million -14.6%4.0%3.3 $0.86 3/31/20223,830,000 shares $3.87 million -12.8%4.7%3.9 $1.01 3/15/20224,390,000 shares $3.35 million +16.1%5.8%4.5 $0.76 2/28/20223,780,000 shares $3.29 million -1.8%5.0%3.6 $0.87 2/15/20223,850,000 shares $3.93 million +3.2%5.1%3.4 $1.02 1/31/20223,730,000 shares $4.40 million +10.7%5.0%3.3 $1.18 1/15/20223,370,000 shares $5.06 million +13.1%9.9%3 $1.50 12/31/20212,980,000 shares $4.95 million +13.7%8.7%2.8 $1.66 12/15/20212,620,000 shares $4.90 million -3.0%7.7%2.4 $1.87 11/30/20212,700,000 shares $5.45 million -4.6%7.9%2.6 $2.02 11/15/20212,830,000 shares $6.54 million +2.9%8.3%2.9 $2.31 10/29/20212,750,000 shares $6.16 million -8.6%8.1%2.6 $2.24Elon’s BIGGEST warning yet? (Ad)Tesla's About to Prove Everyone Wrong... Again Back in 2018, when Jeff Brown told everyone to buy Tesla… The "experts" said Elon was finished and Tesla was headed for bankruptcy. Now they're saying the same thing, but Jeff has uncovered Tesla's next breakthrough.Click here to see why Tesla's about to prove everyone wrong... again. 10/15/20213,010,000 shares $6.89 million +2.4%8.8%2.9 $2.29 9/30/20212,940,000 shares $7.91 million -3.9%8.6%2.7 $2.69 9/15/20213,060,000 shares $8.32 million -39.6%9.0%2.6 $2.72 8/31/20215,070,000 shares $15.41 million +11.4%15.0%3.7 $3.04 8/13/20214,550,000 shares $12.42 million +15.2%13.5%2.9 $2.73 7/30/20213,950,000 shares $11.42 million +10.0%11.7%2.3 $2.89 7/15/20213,590,000 shares $10.55 million -10.5%10.6%2.1 $2.94 6/30/20214,010,000 shares $13.31 million +3.9%11.9%2.2 $3.32 6/15/20213,860,000 shares $13.78 million -17.5%11.5%2 $3.57 5/28/20214,680,000 shares $15.68 million +4.9%14.0%2.5 $3.35 5/14/20214,460,000 shares $12.04 million +6.2%13.3%2.2 $2.70 4/30/20214,200,000 shares $13.65 million -4.1%12.0%2 $3.25 4/15/20214,380,000 shares $13.93 million +13.8%12.5%1.7 $3.18 3/31/20213,850,000 shares $12.28 million +30.5%11.7%1.3 $3.19 3/15/20212,950,000 shares $10.12 million +9.7%9.0%0.9 $3.43 2/26/20212,690,000 shares $9.28 million -10.0%8.2%0.7 $3.45 2/12/20212,990,000 shares $13.19 million -11.8%9.1%0.8 $4.41 1/29/20213,390,000 shares $14.31 million -18.3%10.3%1 $4.22 1/15/20214,150,000 shares $19.55 million -19.6%12.6%1.3 $4.71 12/31/20205,160,000 shares $20.23 million -0.4%15.6%1.7 $3.92 12/15/20205,180,000 shares $13.99 million +14.1%15.8%2 $2.70 11/30/20204,540,000 shares $15.71 million +2.7%13.8%2.2 $3.46 11/15/20204,420,000 shares $13.48 million +3.0%13.4%2.8 $3.05 10/30/20204,290,000 shares $12.10 million +44.9%13.6%2.8 $2.82 10/15/20202,960,000 shares $9.44 million +33.3%9.4%2 $3.19 9/30/20202,220,000 shares $6.99 million +47.0%7.0%1.7 $3.15 9/15/20201,510,000 shares $5.72 million +39.8%4.8%1.2 $3.79 8/31/20201,080,000 shares $3.53 million +11.8%3.4%0.9 $3.27 8/14/2020966,300 shares $2.99 million +28.4%3.1%0.8 $3.09 MBIO Short Interest - Frequently Asked Questions What is Mustang Bio's current short interest? Short interest is the volume of Mustang Bio shares that have been sold short but have not yet been covered or closed out. As of July 15th, investors have sold 369,000 shares of MBIO short. 11.71% of Mustang Bio's shares are currently sold short. Learn More on Mustang Bio's current short interest. What is a good short interest percentage for Mustang Bio? 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. 11.71% of Mustang Bio's floating shares are currently sold short. Is Mustang Bio's short interest increasing or decreasing? Mustang Bio saw a increase in short interest in the month of July. As of July 15th, there was short interest totaling 369,000 shares, an increase of 33,445.5% from the previous total of 1,100 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 Mustang Bio's float size? Mustang Bio currently has issued a total of 4,380,000 shares. Some of Mustang Bio'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. Mustang Bio currently has a public float of 3,150,000 shares. How does Mustang Bio's short interest compare to its competitors? 11.71% of Mustang Bio's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Mustang Bio: FibroBiologics Inc. (2.46%), NanoViricides, Inc. (0.66%), Equillium, Inc. (5.19%), Promis Neurosciences (7.66%), Biodexa Pharmaceuticals PLC Unsponsored ADR (9.99%), Longeveron Inc. (5.20%), Q32 Bio Inc. (12.54%), Natural Alternatives International, Inc. (0.55%), Rallybio Corporation (9.67%), Dare Bioscience, Inc. (12.74%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Coinbase Global, Inc. ($5.11 billion), Charter Communications, Inc. ($4.76 billion), Reddit Inc. ($2.84 billion), SoFi Technologies, Inc. ($2.79 billion), Seagate Technology Holdings PLC ($2.79 billion), Live Nation Entertainment, Inc. ($2.67 billion), Rocket Lab Corporation ($2.49 billion), AST SpaceMobile, Inc. ($2.12 billion), Moderna, Inc. ($2.09 billion), and Omnicom Group Inc. ($2.04 billion). View all of the most shorted stocks. What does it mean to sell short Mustang Bio stock? Short selling MBIO is an investing strategy that aims to generate trading profit from Mustang Bio as its price is falling. MBIO shares are trading up $0.06 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 Mustang Bio? A short squeeze for Mustang Bio 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 MBIO, which in turn drives the price of the stock up even further. How often is Mustang Bio'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 MBIO, twice per month. The most recent reporting period available is July, 15 2025. More Short Interest Resources from MarketBeat Related Companies FBLG Short Interest Data NNVC Short Interest Data EQ Short Interest Data PMN Short Interest Data BDRX Short Interest Data LGVN Short Interest Data QTTB Short Interest Data NAII Short Interest Data RLYB Short Interest Data DARE Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:MBIO) was last updated on 8/6/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | Sponsored[Warning] Buffett Indicator hits new All-Time-HighWarren Buffett has leaned on one key indicator for decades—and it just hit an all-time high. That’s not bullis...Golden Portfolio | SponsoredAltucher: $900 to $108,000? 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