Prothena (PRTA) Short Interest Ratio & Short Volume → This Apple-like Innovator is Revolutionizing Healthcare (From Wall Street Star) (Ad) Free PRTA Stock Alerts $19.95 -0.09 (-0.45%) (As of 05/28/2024 ET) Add Compare Share Share Short InterestStock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsStock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrends Prothena Short Interest DataCurrent Short Interest6,510,000 sharesPrevious Short Interest6,750,000 sharesChange Vs. Previous Month-3.56%Dollar Volume Sold Short$145.76 millionShort Interest Ratio11.9 Days to CoverLast Record DateMay 15, 2024Outstanding Shares53,770,000 sharesPercentage of Shares Shorted12.11%Today's Trading Volume583,739 sharesAverage Trading Volume701,010 sharesToday's Volume Vs. Average83% 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 Resource Stock DigestDigitizing the $11T commodities sector with one tiny stockOne tiny company — trading completely undiscovered around 15-cents per share — has successfully partnered with some of the largest players in the industry to bring a first-of-its-kind digital solution to the global commodities supply chain sector. It’s an opportunity that likely won’t stay at these levels for long 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 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 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. 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 $49.03 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 $60.63Three basic steps to building the Ultimate Dividend Portfolio. 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But a company like Altria Group (MO) will.Click here to get them (for Free). 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 $15.70 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 $12.96Digitizing the $11T commodities sector with one tiny stock (Ad)One tiny company — trading completely undiscovered around 15-cents per share — has successfully partnered with some of the largest players in the industry to bring a first-of-its-kind digital solution to the global commodities supply chain sector. It’s an opportunity that likely won’t stay at these levels for long 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 11/15/20191,800,000 shares $21.73 million +3.5%4.5%9.7 $12.07 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 May 15th, traders have sold 6,510,000 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 12.0. 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. 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 drop in short interest during the month of May. As of May 15th, there was short interest totaling 6,510,000 shares, a drop of 3.6% from the previous total of 6,750,000 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 preparations" compare to Prothena: AbCellera Biologics Inc. (9.58%), Collegium Pharmaceutical, Inc. (21.67%), Gyre Therapeutics, Inc. (0.79%), Mirum Pharmaceuticals, Inc. (18.69%), Arcutis Biotherapeutics, Inc. (19.15%), Enliven Therapeutics, Inc. (19.75%), Cassava Sciences, Inc. (26.68%), Ironwood Pharmaceuticals, Inc. (14.52%), MannKind Co. (13.13%), Day One Biopharmaceuticals, Inc. (17.50%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: T-Mobile US, Inc. ($3.81 billion), Charter Communications, Inc. ($3.30 billion), Occidental Petroleum Co. ($3.10 billion), General Motors ($2.84 billion), Moderna, Inc. ($2.77 billion), AppLovin Co. ($2.22 billion), Royal Caribbean Cruises Ltd. ($2.22 billion), Coinbase Global, Inc. ($2.16 billion), Tractor Supply ($2.12 billion), and Williams-Sonoma, Inc. ($2.12 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 $0.09 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 May, 15 2024. More Short Interest Resources from MarketBeat Related Companies: AbCellera Biologics Short Squeeze Collegium Pharmaceutical Short Squeeze Gyre Therapeutics Short Squeeze Mirum Pharmaceuticals Short Squeeze Arcutis Biotherapeutics Short Squeeze Enliven Therapeutics Short Squeeze Cassava Sciences Short Squeeze Ironwood Pharmaceuticals Short Squeeze MannKind Short Squeeze Day One Biopharmaceuticals 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 5/28/2024 by MarketBeat.com Staff From Our PartnersWARNING about the death of the U.S. dollar…Colonial MetalsTech GIANT’s Plans to Revolutionize Crypto…Crypto 101 MediaExposed: 10 CENT Crypto to Explode May 20th?True Market InsidersDigitizing the $11T commodities sector with one tiny stockResource Stock DigestBiggest Prediction of My 50-Year Career on Wall StreetChaikin AnalyticsHe Is Giving Away BitcoinCrypto Swap ProfitsTim Sykes’ Urgent Trade Alert: “Make this move now”Timothy SykesTruth about Trump you’ve never heardPorter & Company Adding Choose a watchlist: Watchlist Adding You have already added five stocks to your watchlist. 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