Black Diamond Therapeutics (BDTX) Short Interest Ratio & Short Volume $2.58 -0.17 (-6.18%) Closing price 05/18/2026 04:00 PM EasternExtended Trading$2.61 +0.03 (+1.24%) As of 07:03 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 Massive. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Black Diamond Therapeutics Short Interest OverviewAs of April 30, 2026, Black Diamond Therapeutics (BDTX) had a short interest of 4.48 million shares sold short, representing 8.61% of the public float. This marks a -18.19% decrease in short interest since the prior report. The short interest ratio (days to cover) is 5.3, meaning it would take 5.3 days of the average trading volume of 910,094 shares to cover all short positions.Current Short Interest4,477,803 sharesPrevious Short Interest5,473,560 sharesChange Vs. Previous Month-18.19%Dollar Volume Sold Short$11.87 millionShort Interest Ratio5.3 Days to CoverLast Record DateApril 30, 2026Outstanding Shares57,300,000 sharesShort Percent of Float8.61%Today's Trading Volume678,504 sharesAverage Trading Volume910,094 sharesToday's Volume Vs. Average75% Short Selling Black Diamond Therapeutics? Sign up to receive the latest short interest report for Black Diamond Therapeutics and its competitors with MarketBeat's FREE newsletter. Email Address Get Report View SMS TermsSMS is currently available in Australia, Belgium, Canada, France, Germany, Ireland, Italy, New Zealand, the Netherlands, Singapore, South Africa, Spain, Switzerland, the United Kingdom, and the United States. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartBDTX Short Interest Over TimeBDTX Days to Cover Over TimeBDTX Percentage of Float Shorted Over Time Black Diamond Therapeutics Tesla Short Interest History & Recent Changes ExportReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 4/30/20264,477,803 shares $11.87 million -18.2%8.6%5.26 $2.65 4/15/20265,473,560 shares $15.71 million +8.0%10.2%6.68 $2.87 3/31/20265,067,871 shares $10.79 million +0.2%9.4%10.36 $2.13 3/13/20265,058,624 shares $10.72 million +9.4%9.4%6.5 $2.12 2/27/20264,625,166 shares $11.42 million +12.1%8.6%10.66 $2.47 2/13/20264,127,917 shares $9.16 million -0.1%7.7%5.44 $2.22 1/30/20264,133,091 shares $10.29 million +10.1%7.7%4.75 $2.49 1/15/20263,754,051 shares $10.02 million -0.9%7.0%4.03 $2.67 12/31/20253,787,526 shares $9.20 million -39.9%7.1%4.15 $2.43 12/15/20256,298,943 shares $16.69 million +2.9%11.8%2.87 $2.65 Get the Latest News and Ratings for BDTX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Black Diamond Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 11/28/20256,123,148 shares $23.60 million -3.7%11.4%5.91 $3.86 11/14/20256,356,283 shares $25.49 million +2.9%11.9%4.94 $4.01 10/31/20256,174,621 shares $23.90 million -0.4%11.5%8.64 $3.87 10/15/20256,200,000 shares $25.73 million -2.1%11.6%6.6 $4.15 9/30/20256,330,000 shares $23.99 million -11.3%N/A6.7 $3.79 9/15/20257,140,000 shares $22.78 million +1.6%N/A7 $3.19 8/31/20257,030,000 shares $19.33 million +1.9%13.1%7 $2.75 8/15/20256,900,000 shares $19.04 million +6.5%N/A6.4 $2.76 7/31/20256,480,000 shares $17.24 million +6.9%12.1%5.5 $2.66 7/15/20256,060,000 shares $17.88 million +4.3%N/A5.3 $2.95 6/30/20255,810,000 shares $14.41 million -15.1%10.9%5 $2.48 6/15/20256,840,000 shares $15.80 million -9.6%12.8%5.2 $2.31 5/31/20257,570,000 shares $16.88 million -6.3%14.7%2.2 $2.23 5/15/20258,080,000 shares $15.59 million -14.4%15.7%2.5 $1.93 4/30/20259,440,000 shares $16.05 million -2.1%N/A3 $1.70 4/15/20259,640,000 shares $13.69 million -5.2%18.7%3.1 $1.42 3/31/202510,170,000 shares $15.76 million +42.0%19.7%3.1 $1.55 3/15/20257,160,000 shares $12.32 million -3.4%13.9%2.4 $1.72 2/28/20257,410,000 shares $14.89 million -4.0%14.4%9.8 $2.01 2/15/20257,720,000 shares $18.30 million +9.5%15.0%10.2 $2.37 1/31/20257,050,000 shares $18.47 million -5.9%N/A9.3 $2.62 1/15/20257,490,000 shares $15.80 million +17.8%N/A9.7 $2.11 12/31/20246,360,000 shares $13.61 million -0.6%N/A11.2 $2.14 12/15/20246,400,000 shares $16.38 million +4.4%N/A9.3 $2.56 11/30/20246,130,000 shares $16.24 million +3.2%N/A5.2 $2.65 11/15/20245,940,000 shares $15.56 million -6.2%N/A5 $2.62 10/31/20246,330,000 shares $17.34 million -13.5%N/A5.2 $2.74 10/15/20247,320,000 shares $24.89 million +5.9%N/A6.2 $3.40 9/30/20246,910,000 shares $30.06 million +17.9%N/A6.2 $4.35 9/15/20245,860,000 shares $36.27 million -3.5%N/A5.2 $6.19ALERT: Drop these 5 stocks before the market opens tomorrow! 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If any of these are in your portfolio, now is the time to review your positions.See the 5 stocks to avoid 8/31/20246,070,000 shares $37.03 million +1.0%N/A9.4 $6.10 8/15/20246,010,000 shares $29.93 million +35.4%N/A9.4 $4.98 7/31/20244,440,000 shares $27.04 million -6.1%N/A6.4 $6.09 7/15/20244,730,000 shares $28.47 million +47.4%N/A6.2 $6.02 6/30/20243,210,000 shares $14.96 million +8.5%N/A4.1 $4.66 6/15/20242,960,000 shares $17.67 million +13.0%N/A4.4 $5.97 5/31/20242,620,000 shares $12.52 million +22.4%N/A3.9 $4.78 5/15/20242,140,000 shares $11.64 million +7.0%N/A3.3 $5.44 4/30/20242,000,000 shares $11.14 million +13.6%N/A3 $5.57 4/15/20241,760,000 shares $9.19 million -13.7%N/A2.8 $5.22 3/31/20242,040,000 shares $10.34 million +12.7%N/A3.4 $5.07 3/15/20241,810,000 shares $8.67 million +1.7%N/A3.1 $4.79 2/29/20241,780,000 shares $9.16 million -5.3%N/A3.1 $5.15 2/15/20241,880,000 shares $9.51 million -21.7%N/A3.5 $5.06 1/31/20242,400,000 shares $9.22 million -33.0%N/A4.5 $3.84 1/15/20243,580,000 shares $10.67 million -1.1%N/A7.9 $2.98 12/31/20233,620,000 shares $10.17 million -0.6%N/A7.1 $2.81 12/15/20233,640,000 shares $9.86 million +6.4%N/A7 $2.71 11/30/20233,420,000 shares $8.00 million +1.8%N/A6.2 $2.34 11/15/20233,360,000 shares $7.56 million +0.3%N/A6 $2.25 10/31/20233,350,000 shares $6.30 million +12.8%9.8%6.2 $1.88 10/15/20232,970,000 shares $6.80 million +24.3%8.7%5.6 $2.29 9/30/20232,390,000 shares $6.86 million +68.3%7.0%3.9 $2.87 9/15/20231,420,000 shares $5.04 million +24.6%4.1%0.3 $3.55 8/31/20231,140,000 shares $3.84 million +7.6%3.2%0.3 $3.37 8/15/20231,060,000 shares $3.36 million +1.9%2.9%0.3 $3.17 7/31/20231,040,000 shares $3.88 million -67.3%4.7%0.3 $3.73 7/15/20233,180,000 shares $15.42 million -38.4%14.4%0.8 $4.85 6/30/20235,160,000 shares $26.06 million +166.0%23.4%1.3 $5.05 6/15/20231,940,000 shares $4.07 million No Change8.4%31.3 $2.10 5/31/20231,940,000 shares $3.61 million No Change8.4%22.7 $1.86 5/15/20231,940,000 shares $3.74 million -1.5%8.4%24.1 $1.93 4/30/20231,970,000 shares $2.82 million No Change8.6%24.1 $1.43 4/15/20231,970,000 shares $2.94 million -1.5%8.6%22.6 $1.49 3/31/20232,000,000 shares $3.78 million -1.5%8.7%17.3 $1.89 3/15/20232,030,000 shares $3.41 million +3.1%8.8%13.5 $1.68 2/28/20231,970,000 shares $3.49 million -1.0%8.6%14.6 $1.77 2/15/20231,990,000 shares $5.23 million No Change8.7%14.6 $2.63 1/31/20231,990,000 shares $5.97 million -2.0%8.7%13.3 $3.00 1/15/20232,030,000 shares $5.36 million -2.4%8.9%9.6 $2.64 12/30/20222,080,000 shares $3.74 million +5.6%9.1%10 $1.80 12/15/20221,970,000 shares $2.96 million No Change8.6%10.5 $1.50 11/30/20221,970,000 shares $4.16 million -2.5%8.6%11.1 $2.11 11/15/20222,020,000 shares $4.79 million -2.4%8.8%11.2 $2.37 10/31/20222,070,000 shares $4.78 million -7.2%9.1%11.3 $2.31 10/15/20222,230,000 shares $2.83 million +6.2%9.8%14.9 $1.27 9/30/20222,100,000 shares $3.55 million No Change9.2%15.8 $1.69 9/15/20222,100,000 shares $5.50 million -3.7%9.2%11.1 $2.62 8/31/20222,180,000 shares $6.95 million -0.5%9.5%10.7 $3.19 8/15/20222,190,000 shares $8.78 million -4.0%9.6%9.7 $4.01$30 stock to buy before Starlink goes public (WATCH NOW!) (Ad)In the next 3 minutes… James Altucher – legendary investor and venture capitalist… And someone who’s known for playing his cards “close to the vest”… Is going to give you the name and ticker symbol of a company he believes will skyrocket thanks to the coming Starlink IPO…Click here to watch this short 3-minute video now. 7/31/20222,280,000 shares $7.98 million -8.1%10.0%9.6 $3.50 7/15/20222,480,000 shares $7.79 million -5.0%10.9%9.8 $3.14 6/30/20222,610,000 shares $6.42 million -18.2%11.4%9.3 $2.46 6/15/20223,190,000 shares $6.73 million -9.9%14.0%11.5 $2.11 5/31/20223,540,000 shares $5.98 million -1.9%15.5%15.1 $1.69 5/15/20223,610,000 shares $6.39 million +1.4%15.8%15.1 $1.77 4/30/20223,560,000 shares $8.65 million +8.5%15.6%14.6 $2.43 4/15/20223,280,000 shares $11.18 million +3.8%14.4%12.1 $3.41 3/31/20223,160,000 shares $8.75 million -1.6%13.8%5.5 $2.77 3/15/20223,210,000 shares $8.86 million -1.8%14.1%5.5 $2.76 2/28/20223,270,000 shares $10.27 million +3.2%14.3%5.5 $3.14 2/15/20223,170,000 shares $12.01 million -5.9%13.9%5.3 $3.79 1/31/20223,370,000 shares $14.05 million -8.4%14.8%5.7 $4.17 1/15/20223,680,000 shares $15.60 million +19.5%14.8%6.7 $4.24 12/31/20213,080,000 shares $16.42 million +2.7%12.4%5.8 $5.33 12/15/20213,000,000 shares $15.93 million -3.9%12.1%12.9 $5.31 11/30/20213,120,000 shares $18.72 million +1.3%12.6%13.8 $6.00 11/15/20213,080,000 shares $23.56 million -5.5%12.4%13.5 $7.65 10/29/20213,260,000 shares $24.97 million -12.6%13.0%13.7 $7.66 10/15/20213,730,000 shares $30.51 million -4.1%14.9%14.8 $8.18 9/30/20213,890,000 shares $32.91 million -7.8%15.5%14.4 $8.46 9/15/20214,220,000 shares $40.68 million -0.5%16.8%13.5 $9.64 8/31/20214,240,000 shares $42.82 million +2.9%16.8%9.9 $10.10 8/13/20214,120,000 shares $38.23 million +2.0%16.4%7.4 $9.28 7/30/20214,040,000 shares $38.62 million +5.5%16.1%5.1 $9.56 7/15/20213,830,000 shares $38.45 million -1.8%15.2%4.9 $10.04 6/30/20213,900,000 shares $47.54 million -3.0%15.5%4.9 $12.19 6/15/20214,020,000 shares $51.34 million -7.2%16.0%5.3 $12.77 5/28/20214,330,000 shares $56.81 million -6.9%17.2%6.4 $13.12 BDTX Short Interest - Frequently Asked Questions What is Black Diamond Therapeutics' current short interest? Short interest is the volume of Black Diamond Therapeutics shares that have been sold short but have not yet been closed out or covered. As of April 30th, traders have sold 4,477,803 shares of BDTX short. 8.61% of Black Diamond Therapeutics' shares are currently sold short. Learn More on Black Diamond Therapeutics' current short interest. What is a good short interest ratio for Black Diamond Therapeutics? 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. BDTX shares currently have a short interest ratio of 5.3. Learn More on Black Diamond Therapeutics's short interest ratio. What is a good short interest percentage for Black Diamond Therapeutics? 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. 8.61% of Black Diamond Therapeutics' floating shares are currently sold short. Is Black Diamond Therapeutics' short interest increasing or decreasing? Black Diamond Therapeutics saw a decrease in short interest in April. As of April 30th, there was short interest totaling 4,477,803 shares, a decrease of 18.2% from the previous total of 5,473,560 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 Black Diamond Therapeutics' short interest compare to its competitors? 8.61% of Black Diamond Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Black Diamond Therapeutics: CytomX Therapeutics, Inc. (18.71%), Sutro Biopharma, Inc. (6.27%), Zevra Therapeutics, Inc. (8.63%), Arvinas, Inc. (7.39%), Climb Bio, Inc. (3.19%), Tilray Brands, Inc. (16.80%), CorMedix Inc (21.43%), Candel Therapeutics, Inc. (23.38%), Prime Medicine, Inc. (21.75%), Avalo Therapeutics, Inc. (22.46%), 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 ($86.09 billion), Invesco QQQ ($39.89 billion), iShares Russell 2000 ETF ($26.13 billion), Western Digital Corporation ($12.66 billion), Salesforce Inc. ($12.29 billion), Sandisk Corporation ($11.87 billion), SPDR S&P Biotech ETF ($9.82 billion), Lumentum Holdings Inc. ($8.51 billion), iShares 20+ Year Treasury Bond ETF ($7.76 billion), and Bloom Energy Corporation ($7.40 billion). View all of the most shorted stocks. What does it mean to sell short Black Diamond Therapeutics stock? Short selling BDTX is an investing strategy that aims to generate trading profit from Black Diamond Therapeutics as its price is falling. BDTX shares are trading down $0.17 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 Black Diamond Therapeutics? A short squeeze for Black Diamond Therapeutics occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of BDTX, which in turn drives the price of the stock up even further. How often is Black Diamond Therapeutics' 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 BDTX, twice per month. The most recent reporting period available is April, 30 2026. What do BDTX's short interest metrics mean? Understanding short interest metrics can help you assess how traders are positioning around a stock like BDTX:Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity. More Short Interest Resources from MarketBeat Related Companies CytomX Therapeutics Short Squeeze Sutro Biopharma Short Squeeze Zevra Therapeutics Short Squeeze Arvinas Short Squeeze Climb Bio Short Squeeze Tilray Brands Short Squeeze CorMedix Short Squeeze Candel Therapeutics Short Squeeze Prime Medicine Short Squeeze Avalo 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:BDTX) was last updated on 5/19/2026 by MarketBeat.com Staff. 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