PDS Biotechnology (PDSB) Short Interest Ratio & Short Volume $1.29 -0.01 (-0.77%) As of 09:39 AM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock PDS Biotechnology Short Interest DataPDS Biotechnology (PDSB) has a short interest of 1.99 million shares, representing 4.79% of the float (the number of shares available for trading by the public). This marks a -31.38% decrease in short interest from the previous month. The short interest ratio (days to cover) is 4.1, indicating that it would take 4.1 days of the average trading volume of 471,616 shares to cover all short positions.Current Short Interest1,990,000 sharesPrevious Short Interest2,900,000 sharesChange Vs. Previous Month-31.38%Dollar Volume Sold Short$3.48 millionShort Interest Ratio4.1 Days to CoverLast Record DateJune 15, 2025Outstanding Shares45,710,000 sharesShort Percent of Float4.79%Today's Trading Volume90,455 sharesAverage Trading Volume471,616 sharesToday's Volume Vs. Average19% Short Selling PDS Biotechnology? Sign up to receive the latest short interest report for PDS Biotechnology and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartPDSB Short Interest Over TimePDSB Days to Cover Over TimePDSB Percentage of Float Shorted Over Time PDS Biotechnology Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/15/20251,990,000 shares $3.48 million -31.4%4.8%4.1 $1.75 5/31/20252,900,000 shares $3.94 million +0.7%8.6%6.2 $1.36 5/15/20252,880,000 shares $3.89 million -3.0%8.5%3.9 $1.35 4/30/20252,970,000 shares $4.16 million -1.0%N/A4.9 $1.40 4/15/20253,000,000 shares $3.33 million -4.5%8.9%4.9 $1.11 3/31/20253,140,000 shares $3.74 million -18.7%9.3%5.1 $1.19 3/15/20253,860,000 shares $4.75 million -17.3%11.4%6.3 $1.23 2/28/20254,670,000 shares $6.21 million +20.7%13.8%7.4 $1.33 2/15/20253,870,000 shares $6.04 million -3.5%11.4%9.8 $1.56 1/31/20254,010,000 shares $6.58 million -2.4%N/A10.6 $1.64 Get the Latest News and Ratings for PDSB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for PDS Biotechnology and its competitors with MarketBeat's FREE daily newsletter. 1/15/20254,110,000 shares $5.96 million +1.2%N/A10.3 $1.45 12/31/20244,060,000 shares $6.62 million -4.0%N/A10.1 $1.63 12/15/20244,230,000 shares $7.78 million +9.0%N/A9.5 $1.84 11/30/20243,880,000 shares $8.50 million +0.3%N/A9.2 $2.19 11/15/20243,870,000 shares $7.78 million -13.4%N/A9.9 $2.01 10/31/20244,470,000 shares $14.26 million -6.9%N/A14.3 $3.19 10/15/20244,800,000 shares $15.50 million +0.2%N/A16.1 $3.23 9/30/20244,790,000 shares $18.30 million +3.9%N/A14.2 $3.82 9/15/20244,610,000 shares $13.83 million -3.2%N/A11.2 $3.00 8/31/20244,760,000 shares $15.23 million -5.4%N/A10.7 $3.20 8/15/20245,030,000 shares $16.25 million -0.8%N/A10.4 $3.23 7/31/20245,070,000 shares $18.05 million -11.1%N/A8.8 $3.56 7/15/20245,700,000 shares $24.08 million -18.6%N/A9.1 $4.23 6/30/20247,000,000 shares $20.51 million +3.7%N/A10.4 $2.93 6/15/20246,750,000 shares $18.80 million +0.6%N/A8.7 $2.79 5/31/20246,710,000 shares $20.00 million -2.0%N/A8.2 $2.98 5/15/20246,850,000 shares $23.98 million -0.2%N/A7.3 $3.50 4/30/20246,860,000 shares $22.98 million -3.9%N/A7.6 $3.35 4/15/20247,140,000 shares $20.13 million +16.1%N/A7.7 $2.82 3/31/20246,150,000 shares $24.35 million +11.6%N/A6.7 $3.96 3/15/20245,510,000 shares $27.00 million +9.5%N/A7 $4.90 2/29/20245,030,000 shares $33.15 million +0.4%N/A7.1 $6.59 2/15/20245,010,000 shares $27.35 million -5.1%N/A8.4 $5.46 1/31/20245,280,000 shares $28.25 million +1.9%N/A8.6 $5.35 1/15/20245,180,000 shares $22.38 million +5.5%N/A9.2 $4.32 12/31/20234,910,000 shares $24.40 million +4.7%N/A9.8 $4.97 12/15/20234,690,000 shares $23.92 million -3.5%N/A9 $5.10 11/30/20234,860,000 shares $25.56 million -7.4%N/A9.9 $5.26 11/15/20235,250,000 shares $33.18 million -4.9%N/A11.3 $6.32 10/31/20235,520,000 shares $23.02 million -6.3%N/A12 $4.17A grave, grave error. (Ad)I thought what happened 25 years ago was a once- in-a-lifetime event… but how wrong I was. Because here we are, a quarter of a century later, almost to the exact day, and it’s happening again. Here’s the full story for you. 10/15/20235,890,000 shares $26.56 million +11.8%N/A12.3 $4.51 9/30/20235,270,000 shares $26.61 million +15.3%N/A9.9 $5.05 9/15/20234,570,000 shares $24.40 million +6.5%N/A7.9 $5.34 8/31/20234,290,000 shares $25.18 million +7.8%N/A6.4 $5.87 8/15/20233,980,000 shares $23.40 million +0.5%N/A3.9 $5.88 7/31/20233,960,000 shares $22.63 million -5.5%N/A4.3 $5.72 7/15/20234,190,000 shares $21.49 million +8.0%N/A4.7 $5.13 6/30/20233,880,000 shares $19.52 million +32.0%N/A4.5 $5.03 6/15/20232,940,000 shares $18.29 million +9.7%N/A3.5 $6.22 5/31/20232,680,000 shares $25.67 million +27.0%N/A3.9 $9.58 5/15/20232,110,000 shares $14.62 million No ChangeN/A6.1 $6.93 4/30/20232,110,000 shares $12.83 million +3.4%N/A5.9 $6.08 4/15/20232,040,000 shares $14.06 million +2.5%N/A4.9 $6.89 3/31/20231,990,000 shares $12.24 million +7.6%N/A4.3 $6.15 3/15/20231,850,000 shares $12.27 million +1.7%N/A3.1 $6.63 2/28/20231,820,000 shares $13.92 million +15.2%N/A3 $7.65 2/15/20231,580,000 shares $13.84 million -3.7%N/A2.5 $8.76 1/31/20231,640,000 shares $13.66 million +9.3%N/A1.6 $8.33 1/15/20231,500,000 shares $15.57 million +5.6%N/A1.5 $10.38 12/30/20221,420,000 shares $18.74 million +34.0%N/A1.4 $13.20 12/15/20221,060,000 shares $10.01 million -2.8%N/A1.3 $9.44 11/30/20221,090,000 shares $9.84 million -26.4%N/A1.4 $9.03 11/15/20221,480,000 shares $12.85 million +5.7%N/A2.1 $8.68 10/31/20221,400,000 shares $7.34 million +6.9%N/A5.7 $5.24 10/15/20221,310,000 shares $5.23 million +0.8%N/A5.4 $3.99 9/30/20221,300,000 shares $3.86 million -6.5%N/A5.9 $2.97 9/15/20221,390,000 shares $5.45 million -6.1%N/A6 $3.92 8/31/20221,480,000 shares $6.20 million -1.3%N/A5.3 $4.19 8/15/20221,500,000 shares $8.69 million -10.2%N/A2.4 $5.79 7/31/20221,670,000 shares $7.15 million -5.1%N/A2.5 $4.28 7/15/20221,760,000 shares $7.00 million -6.9%N/A2.7 $3.98 6/30/20221,890,000 shares $6.90 million +0.5%N/A3 $3.65 6/15/20221,880,000 shares $6.07 million +20.5%N/A3 $3.23 5/31/20221,560,000 shares $6.12 million +4.0%N/A2.6 $3.92 5/15/20221,500,000 shares $6.84 million +2.0%N/A5.6 $4.56 4/30/20221,470,000 shares $8.13 million +1.4%N/A5.8 $5.53 4/15/20221,450,000 shares $8.12 million +0.7%N/A4.6 $5.60 3/31/20221,440,000 shares $8.91 million +0.7%N/A4.2 $6.19 3/15/20221,430,000 shares $7.81 million +14.4%N/A4 $5.46 2/28/20221,250,000 shares $7.48 million +50.7%N/A3.2 $5.98 2/15/2022829,500 shares $5.72 million +32.5%N/A2.1 $6.90 1/31/2022625,900 shares $3.73 million -5.5%N/A1.5 $5.96 1/15/2022662,000 shares $4.51 million +4.8%N/A1.8 $6.82 12/31/2021631,600 shares $5.12 million -10.6%N/A1.7 $8.10 12/15/2021706,800 shares $6.34 million +33.4%N/A1.7 $8.97 11/30/2021529,800 shares $5.22 million -26.5%N/A1.2 $9.85 11/15/2021720,300 shares $7.86 million -6.7%N/A1.6 $10.91 10/29/2021772,000 shares $9.29 million -5.0%N/A1.6 $12.04 10/15/2021812,700 shares $10.02 million +66.2%N/A1.7 $12.33 9/30/2021489,100 shares $7.29 million +10.2%N/A1 $14.90A grave, grave error. (Ad)I thought what happened 25 years ago was a once- in-a-lifetime event… but how wrong I was. Because here we are, a quarter of a century later, almost to the exact day, and it’s happening again. Here’s the full story for you. 9/15/2021443,900 shares $6.79 million -1.6%N/A0.8 $15.30 8/31/2021451,100 shares $7.01 million +11.9%2.0%0.5 $15.55 8/13/2021403,200 shares $4.29 million -19.3%1.8%0.4 $10.65 7/30/2021499,600 shares $5.33 million -18.7%2.3%0.3 $10.67 7/15/2021614,500 shares $6.00 million -26.5%2.9%0.3 $9.77 6/30/2021836,400 shares $10.50 million -31.4%4.2%0.5 $12.55 6/15/20211,220,000 shares $11.22 million +20.8%5.6%0.7 $9.20 5/28/20211,010,000 shares $12.32 million +18.8%5.7%0.5 $12.20 5/14/2021850,500 shares $3.81 million +27.8%N/A0.4 $4.48 4/30/2021665,600 shares $3.80 million -29.0%N/A0.4 $5.71 4/15/2021937,100 shares $4.92 million +207.3%N/A0.6 $5.25 3/31/2021305,000 shares $1.30 million -62.6%N/A0.2 $4.25 3/15/2021816,300 shares $4.61 million +73.6%N/A0.5 $5.65 2/26/2021470,300 shares $2.09 million +38.8%N/A0.5 $4.45 2/12/2021338,900 shares $1.90 million -26.2%N/A0.4 $5.61 1/29/2021458,900 shares $1.18 million +19.2%N/A0.6 $2.57 1/15/2021385,100 shares $1.06 million -40.7%N/A0.8 $2.76 12/31/2020648,900 shares $1.45 million +39.4%N/A1.4 $2.23 12/15/2020465,400 shares $981.99 thousand +8.1%N/A1 $2.11 11/30/2020430,400 shares $912.45 thousand +10.5%N/A0.9 $2.12 11/15/2020389,600 shares $798.68 thousand +10.9%N/A1 $2.05 10/30/2020351,300 shares $751.78 thousand +66.8%N/A0.6 $2.14 10/15/2020210,600 shares $494.91 thousand -32.1%N/A0.3 $2.35 9/30/2020310,000 shares $722.30 thousand -42.8%N/A0.3 $2.33 9/15/2020542,000 shares $1.36 million -22.9%N/A0.3 $2.51 8/31/2020702,900 shares $1.71 million +0.8%N/A0.4 $2.43 8/14/2020697,200 shares $1.95 million -1.5%N/A0.4 $2.79 7/31/2020708,100 shares $2.59 million +4.9%N/A0.4 $3.66 7/15/2020675,200 shares $1.38 million +279.8%N/A0.4 $2.04 PDSB Short Interest - Frequently Asked Questions What is PDS Biotechnology's current short interest? Short interest is the volume of PDS Biotechnology shares that have been sold short but have not yet been closed out or covered. As of June 15th, traders have sold 1,990,000 shares of PDSB short. 4.79% of PDS Biotechnology's shares are currently sold short. Learn More on PDS Biotechnology's current short interest. What is a good short interest ratio for PDS Biotechnology? 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. PDSB shares currently have a short interest ratio of 4.0. Learn More on PDS Biotechnology's short interest ratio. Which institutional investors are shorting PDS Biotechnology? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of PDS Biotechnology: Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for PDS Biotechnology? 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. 4.79% of PDS Biotechnology's floating shares are currently sold short. Is PDS Biotechnology's short interest increasing or decreasing? PDS Biotechnology saw a decrease in short interest in June. As of June 15th, there was short interest totaling 1,990,000 shares, a decrease of 31.4% from the previous total of 2,900,000 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 PDS Biotechnology's short interest compare to its competitors? 4.79% of PDS Biotechnology's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to PDS Biotechnology: Inozyme Pharma, Inc. (7.79%), Tonix Pharmaceuticals Holding Corp. (15.37%), Candel Therapeutics, Inc. (17.18%), DBV Technologies S.A. (0.08%), Sagimet Biosciences Inc. (16.13%), Prima BioMed Ltd (2.96%), Aurora Cannabis Inc. (8.98%), Neurogene Inc. (19.15%), biote Corp. (2.86%), Acelyrin, Inc. (4.87%), 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 ($69.26 billion), Invesco QQQ ($25.22 billion), iShares Russell 2000 ETF ($20.33 billion), iShares 20+ Year Treasury Bond ETF ($9.99 billion), MicroStrategy Incorporated ($9.12 billion), Canadian Natural Resources Limited ($6.73 billion), SPDR S&P Biotech ETF ($6.52 billion), Invesco S&P 500 Equal Weight ETF ($5.60 billion), Financial Select Sector SPDR Fund ($4.64 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.59 billion). View all of the most shorted stocks. What does it mean to sell short PDS Biotechnology stock? Short selling PDSB is an investing strategy that aims to generate trading profit from PDS Biotechnology as its price is falling. PDSB 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 PDS Biotechnology? A short squeeze for PDS Biotechnology 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 PDSB, which in turn drives the price of the stock up even further. How often is PDS Biotechnology'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 PDSB, twice per month. The most recent reporting period available is June, 15 2025. More Short Interest Resources from MarketBeat Related Companies Adherex Technologies Short Squeeze Inhibrx Biosciences Short Squeeze Canopy Growth Short Squeeze Esperion Therapeutics Short Squeeze biote Short Squeeze Nanobiotix Short Squeeze ProQR Therapeutics Short Squeeze Acelyrin Short Squeeze Semper Paratus Acquisition Short Squeeze Monopar 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:PDSB) was last updated on 7/11/2025 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 | SponsoredPresidential Bombshell: $150T Resource to Be Released as soon as this Summer?Something extraordinary is happening in Washington. 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