Prothena (PRTA) Short Interest Ratio & Short Volume $14.41 +0.01 (+0.07%) (As of 10:31 AM ET) Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrends Prothena Short Interest DataProthena (PRTA) has a short interest of 7.53 million shares. This marks a 10.90% increase in short interest from the previous month. The short interest ratio (days to cover) is 16.3, indicating that it would take 16.3 days of the average trading volume of 580,591 shares to cover all short positions.Current Short Interest7,530,000 sharesPrevious Short Interest6,790,000 sharesChange Vs. Previous Month+10.90%Dollar Volume Sold Short$128.01 millionShort Interest Ratio16.3 Days to CoverLast Record DateOctober 31, 2024Outstanding Shares53,810,000 sharesPercentage of Shares Shorted13.99%Today's Trading Volume21,339 sharesAverage Trading Volume580,591 sharesToday's Volume Vs. Average4% Short Selling Prothena? Sign up to receive the latest short interest report for Prothena and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartPRTA Short Interest Over TimePRTA Days to Cover Over TimePRTA Percentage of Float Shorted Over Time Ad WealthPressThis Bull Market Indicator called NVDA at $116Every now and again we find an investment idea so incredible we can’t help but share. And today is one of those rare days… Except, today we won't be giving you insight on any one particular stock… But rather, insight on a revolutionary new stock picking indicator… In fact, within the last year, this indicator has become famous for a multitude of reasons… But one of the biggest was because of the buy signal it issued on October 18th, 2022. In fact, on that very day, it said to buy NVDA at $116.37… Anyone who did would be sitting on a tremendously large return today… But even if you missed the original buy signal from October, this incredible indicator issued 11 other buy signals while Nvidia made its epic run…All you have to do is follow this link here Prothena Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 10/31/20247,530,000 shares $128.01 million +10.9%N/A16.3 $17.00 10/15/20246,790,000 shares $114.89 million +28.1%N/A15.3 $16.92 9/30/20245,300,000 shares $88.67 million -7.3%N/A11.5 $16.73 9/15/20245,720,000 shares $126.47 million +2.3%N/A14.9 $22.11 8/31/20245,590,000 shares $124.49 million +3.9%N/A12.8 $22.27 8/15/20245,380,000 shares $112.28 million No ChangeN/A11.4 $20.87 Get the Latest News and Ratings for PRTA and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Prothena and its competitors with MarketBeat's FREE daily newsletter. 7/31/20245,380,000 shares $125.25 million +12.8%N/A10.7 $23.28 7/15/20244,770,000 shares $107.75 million -6.5%N/A9.1 $22.59 6/30/20245,100,000 shares $105.26 million -23.4%N/A9.7 $20.64 6/15/20246,660,000 shares $135.93 million -0.8%N/A12.2 $20.41 5/31/20246,710,000 shares $139.64 million +3.1%N/A12.6 $20.81 5/15/20246,510,000 shares $145.76 million -3.6%N/A11.9 $22.39 4/30/20246,750,000 shares $137.30 million +1.8%N/A11.1 $20.34 4/15/20246,630,000 shares $145.79 million +2.5%N/A10.1 $21.99 3/31/20246,470,000 shares $160.26 million +3.5%N/A8.1 $24.77 3/15/20246,250,000 shares $162.94 million +3.0%N/A7.6 $26.07 2/29/20246,070,000 shares $167.47 million +4.5%N/A7 $27.59 2/15/20245,810,000 shares $165.70 million +1.0%N/A6.6 $28.52 1/31/20245,750,000 shares $163.24 million -8.2%N/A6.8 $28.39 1/15/20246,260,000 shares $217.03 million +3.0%N/A7 $34.67 12/31/20236,080,000 shares $220.95 million +4.5%N/A6.8 $36.34 12/15/20235,820,000 shares $232.74 million -15.0%N/A7.6 $39.99 11/30/20236,850,000 shares $223.17 million +10.7%N/A10.1 $32.58 11/15/20236,190,000 shares $217.15 million -4.8%N/A9.6 $35.08 10/31/20236,500,000 shares $236.99 million +28.0%N/A10.6 $36.46 10/15/20235,080,000 shares $223.93 million +15.7%N/A10.4 $44.08 9/30/20234,390,000 shares $211.82 million +2.6%N/A10.7 $48.25 9/15/20234,280,000 shares $224.53 million +3.9%N/A11.2 $52.46 8/31/20234,120,000 shares $217.62 million +11.4%N/A10.6 $52.82 8/15/20233,700,000 shares $223.33 million +0.8%N/A9.4 $60.36 7/31/20233,670,000 shares $252.75 million +0.8%N/A9 $68.87 7/15/20233,640,000 shares $254.84 million +3.4%N/A8.3 $70.01 6/30/20233,520,000 shares $240.35 million -4.4%N/A7.9 $68.28 6/15/20233,680,000 shares $267.06 million +10.8%N/A7.8 $72.57 5/31/20233,320,000 shares $220.55 million +3.4%N/A7.1 $66.43 5/15/20233,210,000 shares $240.65 million -1.8%N/A6.7 $74.97 4/30/20233,270,000 shares $172.07 million No ChangeN/A6.9 $52.62 4/15/20233,270,000 shares $164.91 million -11.9%N/A7.5 $50.43 3/31/20233,710,000 shares $179.82 million +7.5%N/A8.3 $48.47 3/15/20233,450,000 shares $169.15 million +11.7%N/A6.9 $49.03My #1 Pre IPO Trade for 2025 – NAME and TICKER (Ad)One tiny company... 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Get urgent details inside this free report...The Next SpaceX Pre-IPO 2/28/20233,090,000 shares $172.30 million +4.4%N/A5.9 $55.76 2/15/20232,960,000 shares $159.60 million +6.5%N/A5.6 $53.92 1/31/20232,780,000 shares $157.21 million -3.5%N/A5 $56.55 1/15/20232,880,000 shares $163.87 million +9.1%N/A5 $56.90 12/30/20222,640,000 shares $159.06 million +9.5%N/A4.4 $60.25 12/15/20222,410,000 shares $141.03 million +6.6%N/A2.9 $58.52 11/30/20222,260,000 shares $141.27 million +1.4%N/A2.7 $62.51 11/15/20222,230,000 shares $138.64 million -8.2%N/A2.7 $62.17 10/31/20222,430,000 shares $149.30 million -10.7%N/A3.1 $61.44 10/15/20222,720,000 shares $149.19 million -16.6%6.2%3.7 $54.85 9/30/20223,260,000 shares $197.65 million +32.5%7.4%4.8 $60.63 9/15/20222,460,000 shares $73.80 million -8.2%5.6%6.5 $30.00 8/31/20222,680,000 shares $73.89 million +2.3%6.1%7.5 $27.57 8/15/20222,620,000 shares $85.57 million -0.4%6.0%7.9 $32.66 7/31/20222,630,000 shares $81.69 million -12.9%6.0%6.9 $31.06 7/15/20223,020,000 shares $92.74 million -0.3%6.9%7.2 $30.71 6/30/20223,030,000 shares $82.26 million -8.7%6.9%7.1 $27.15 6/15/20223,320,000 shares $78.62 million -7.8%8.3%7.8 $23.68 5/31/20223,600,000 shares $98.03 million +4.4%N/A8.8 $27.23 5/15/20223,450,000 shares $90.74 million +31.2%N/A8 $26.30 4/30/20222,630,000 shares $76.69 million +1.5%N/A6.3 $29.16 4/15/20222,590,000 shares $93.63 million +0.8%N/A6.3 $36.15 3/31/20222,570,000 shares $93.98 million -8.2%N/A5.9 $36.57 3/15/20222,800,000 shares $93.32 million -7.9%N/A6.2 $33.33 2/28/20223,040,000 shares $105.18 million -6.2%N/A6.3 $34.60 2/15/20223,240,000 shares $121.40 million +12.5%N/A6.7 $37.47 1/31/20222,880,000 shares $98.15 million +14.3%N/A6.5 $34.08 1/15/20222,520,000 shares $99.62 million +2.0%N/A6 $39.53 12/31/20212,470,000 shares $122.02 million +13.8%N/A6.7 $49.40 12/15/20212,170,000 shares $98.00 million +14.2%N/A6.1 $45.16 11/30/20211,900,000 shares $95.29 million +11.8%N/A5.7 $50.15 11/15/20211,700,000 shares $97.22 million -9.6%N/A5 $57.19 10/29/20211,880,000 shares $104.06 million +27.0%N/A5.5 $55.35 10/15/20211,480,000 shares $93.92 million -0.7%N/A4.3 $63.46 9/30/20211,490,000 shares $106.13 million +5.7%N/A4.1 $71.23 9/15/20211,410,000 shares $105.50 million +4.4%N/A3.3 $74.82 8/31/20211,350,000 shares $90.61 million -6.3%N/A2.8 $67.12 8/13/20211,440,000 shares $84.17 million -4.6%N/A3 $58.45 7/30/20211,510,000 shares $75.65 million +0.7%N/A3.1 $50.10 7/15/20211,500,000 shares $77.64 million -8.0%3.4%3.1 $51.76 6/30/20211,630,000 shares $83.80 million -23.8%3.7%3.5 $51.41 6/15/20212,140,000 shares $111.22 million +24.4%4.9%4.8 $51.97 5/28/20211,720,000 shares $50.17 million -3.9%3.9%4.3 $29.17 5/14/20211,790,000 shares $38.72 million -11.4%N/A4.9 $21.63 4/30/20212,020,000 shares $54.24 million -1.5%N/A4.5 $26.85 4/15/20212,050,000 shares $49.12 million +9.0%N/A4.2 $23.96 3/31/20211,880,000 shares $42.60 million +101.7%N/A3.9 $22.66 3/15/2021931,900 shares $21.47 million -4.9%N/A2 $23.04 2/26/2021979,700 shares $22.14 million +38.2%N/A2.3 $22.60 2/12/2021709,000 shares $11.13 million +5.1%N/A1.8 $15.70My #1 Pre IPO Trade for 2025 – NAME and TICKER (Ad)One tiny company... 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Get urgent details inside this free report...The Next SpaceX Pre-IPO 1/29/2021674,400 shares $8.05 million +4.4%1.8%2.2 $11.93 1/15/2021646,200 shares $9.31 million -11.6%N/A2.6 $14.40 12/31/2020731,100 shares $9.05 million -49.2%N/A2.8 $12.38 12/15/20201,440,000 shares $18.33 million +12.5%N/A5.3 $12.73 11/30/20201,280,000 shares $14.45 million -2.3%N/A4.4 $11.29 11/15/20201,310,000 shares $16.11 million -6.4%N/A4.9 $12.30 10/30/20201,400,000 shares $15.76 million +7.7%N/A5.3 $11.26 10/15/20201,300,000 shares $14.60 million -3.0%N/A5.2 $11.23 9/30/20201,340,000 shares $13.39 million -17.8%N/A5.1 $9.99 9/15/20201,630,000 shares $19.33 million +10.1%N/A5.4 $11.86 8/31/20201,480,000 shares $19.18 million -3.3%N/A5.3 $12.96 8/14/20201,530,000 shares $18.85 million +15.9%N/A5.3 $12.32 7/31/20201,320,000 shares $16.16 million -5.0%N/A4.4 $12.24 7/15/20201,390,000 shares $17.44 million +4.5%N/A4.5 $12.55 6/30/20201,330,000 shares $13.91 million +30.4%N/A4.4 $10.46 6/15/20201,020,000 shares $9.86 million -6.4%N/A3.7 $9.67 5/29/20201,090,000 shares $12.11 million -14.8%N/A4 $11.11 5/15/20201,280,000 shares $14.45 million -2.3%N/A4.9 $11.29 4/30/20201,310,000 shares $14.58 million -14.4%N/A5.3 $11.13 4/15/20201,530,000 shares $17.23 million -3.8%N/A6.8 $11.26 3/31/20201,590,000 shares $19.00 million -2.5%N/A7.6 $11.95 3/13/20201,631,000 shares $18.92 million +5.2%N/A8.5 $11.60 2/28/20201,550,000 shares $14.17 million +2.7%N/A7.6 $9.14 2/14/20201,510,000 shares $15.08 million -12.7%N/A7 $9.99 1/31/20201,730,000 shares $20.76 million -4.4%N/A7.6 $12.00 1/15/20201,810,000 shares $23.40 million +1.7%N/A8 $12.93 12/31/20191,780,000 shares $23.34 million -8.7%N/A8 $13.11 PRTA Short Interest - Frequently Asked Questions What is Prothena's current short interest? Short interest is the volume of Prothena shares that have been sold short but have not yet been covered or closed out. As of October 31st, investors have sold 7,530,000 shares of PRTA short. Learn More on Prothena's current short interest. What is a good short interest ratio for Prothena? 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. PRTA shares currently have a short interest ratio of 16.0. Learn More on Prothena's short interest ratio. Which institutional investors are shorting Prothena? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Prothena: Ikarian Capital LLC, and Walleye Capital LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Prothena's short interest increasing or decreasing? Prothena saw a increase in short interest during the month of October. As of October 31st, there was short interest totaling 7,530,000 shares, an increase of 10.9% from the previous total of 6,790,000 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 Prothena's short interest compare to its competitors? Here is how the short interest of companies in the sector of "medical" compare to Prothena: Akebia Therapeutics, Inc. (6.80%), UroGen Pharma Ltd. (28.14%), Puma Biotechnology, Inc. (9.07%), Marinus Pharmaceuticals, Inc. (10.26%), Dynavax Technologies Co. (14.33%), Dyne Therapeutics, Inc. (9.77%), Edgewise Therapeutics, Inc. (12.19%), Bausch Health Companies Inc. (3.59%), Xenon Pharmaceuticals Inc. (3.79%), Merus (12.65%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Charter Communications, Inc. ($4.08 billion), AppLovin Co. ($3.18 billion), Paychex, Inc. ($2.64 billion), Nu Holdings Ltd. ($2.54 billion), International Paper ($2.46 billion), Cencora, Inc. ($2.27 billion), Moderna, Inc. ($1.87 billion), SoFi Technologies, Inc. ($1.81 billion), Lululemon Athletica Inc. ($1.75 billion), and Onsemi ($1.71 billion). View all of the most shorted stocks. What does it mean to sell short Prothena stock? Short selling PRTA is an investing strategy that aims to generate trading profit from Prothena as its price is falling. PRTA shares are trading up $0.35 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 Prothena? A short squeeze for Prothena 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 PRTA, which in turn drives the price of the stock up even further. How often is Prothena'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 PRTA, twice per month. The most recent reporting period available is October, 31 2024. More Short Interest Resources from MarketBeat Related Companies Akebia Therapeutics Short Squeeze UroGen Pharma Short Squeeze Puma Biotechnology Short Squeeze Marinus Pharmaceuticals Short Squeeze Dynavax Technologies Short Squeeze HUTCHMED Short Squeeze Edgewise Therapeutics Short Squeeze Dyne Therapeutics Short Squeeze Xenon Pharmaceuticals Short Squeeze Bausch Health Companies 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:PRTA) was last updated on 11/21/2024 by MarketBeat.com Staff From Our PartnersMissed Nvidia? 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