Prothena (PRTA) Short Interest Ratio & Short Volume $15.22 -0.79 (-4.93%) (As of 12/20/2024 05:51 PM ET) Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrends Prothena Short Interest DataProthena (PRTA) has a short interest of 8.06 million shares. This marks a 2.28% increase in short interest from the previous month. The short interest ratio (days to cover) is 15.3, indicating that it would take 15.3 days of the average trading volume of 592,325 shares to cover all short positions.Current Short Interest8,060,000 sharesPrevious Short Interest7,880,000 sharesChange Vs. Previous Month+2.28%Dollar Volume Sold Short$130.65 millionShort Interest Ratio15.3 Days to CoverLast Record DateNovember 30, 2024Outstanding Shares53,809,000 sharesPercentage of Shares Shorted14.98%Today's Trading Volume1,557,225 sharesAverage Trading Volume592,325 sharesToday's Volume Vs. Average263% 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 Crypto 101 MediaThis Crypto Is Set to Explode in DecemberIt's a groundbreaking opportunity that could be poised for extraordinary gains. The catalyst behind this surge is a massive new blockchain development…YES, I WANT THE #1 CRYPTO NOW 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 11/30/20248,060,000 shares $130.65 million +2.3%N/A15.3 $16.21 11/15/20247,880,000 shares $110.40 million +4.7%N/A15.9 $14.01 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 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. 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 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 $50.43This Crypto Is Set to Explode in December (Ad)It's a groundbreaking opportunity that could be poised for extraordinary gains. The catalyst behind this surge is a massive new blockchain development…YES, I WANT THE #1 CRYPTO NOW 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 $49.03 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 $23.04This Crypto Is Set to Explode in December (Ad)It's a groundbreaking opportunity that could be poised for extraordinary gains. The catalyst behind this surge is a massive new blockchain development…YES, I WANT THE #1 CRYPTO NOW 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 $15.70 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 closed out or covered. As of November 30th, traders have sold 8,060,000 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 15.0. 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 in November. As of November 30th, there was short interest totaling 8,060,000 shares, an increase of 2.3% from the previous total of 7,880,000 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 industry of "pharmaceutical products" compare to Prothena: Dyne Therapeutics, Inc. (10.17%), HUTCHMED (China) Limited (0.29%), Catalyst Pharmaceuticals, Inc. (5.11%), Agios Pharmaceuticals, Inc. (8.29%), Protagonist Therapeutics, Inc. (5.70%), Iovance Biotherapeutics, Inc. (23.06%), Amneal Pharmaceuticals, Inc. (3.69%), Longboard Pharmaceuticals, Inc. (5.94%), NewAmsterdam Pharma (6.04%), IDEAYA Biosciences, Inc. (11.57%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Co. ($5.70 billion), Charter Communications, Inc. ($4.55 billion), Spotify Technology S.A. ($3.84 billion), Royal Caribbean Cruises Ltd. ($3.07 billion), International Paper ($3.00 billion), Coinbase Global, Inc. ($2.93 billion), Cencora, Inc. ($2.54 billion), Paychex, Inc. ($2.53 billion), SoFi Technologies, Inc. ($2.24 billion), and Reddit, Inc. ($2.00 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 down $0.79 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 November, 30 2024. More Short Interest Resources from MarketBeat Related Companies Dyne Therapeutics Short Squeeze HUTCHMED Short Squeeze Catalyst Pharmaceuticals Short Squeeze Agios Pharmaceuticals Short Squeeze Protagonist Therapeutics Short Squeeze Iovance Biotherapeutics Short Squeeze Amneal Pharmaceuticals Short Squeeze Longboard Pharmaceuticals Short Squeeze NewAmsterdam Pharma Short Squeeze IDEAYA Biosciences 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 12/21/2024 by MarketBeat.com Staff From Our PartnersAmazon coin set to soar 25X – starting December 16th?This tiny 3-cent crypto just partnered with one of the biggest companies in the world… Amazon. And one team...True Market Insiders | SponsoredDid You See Trump’s Bombshell Exec. Order 001?Biden broke it... Now Trump is going to fix it. Starting with "Exec. 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