Apellis Pharmaceuticals (APLS) Short Interest Ratio & Short Volume $19.58 +0.19 (+0.98%) Closing price 06/10/2025 04:00 PM EasternExtended Trading$19.82 +0.24 (+1.25%) As of 04:45 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 Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Apellis Pharmaceuticals Short Interest DataApellis Pharmaceuticals (APLS) has a short interest of 27.25 million shares, representing 23.50% of the float (the number of shares available for trading by the public). This marks a -5.28% decrease in short interest from the previous month. The short interest ratio (days to cover) is 11.0, indicating that it would take 11.0 days of the average trading volume of 2.31 million shares to cover all short positions.Current Short Interest27,250,000 sharesPrevious Short Interest28,770,000 sharesChange Vs. Previous Month-5.28%Dollar Volume Sold Short$445.81 millionShort Interest Ratio11.0 Days to CoverLast Record DateMay 15, 2025Outstanding Shares125,682,000 sharesShort Percent of Float23.50%Today's Trading Volume1,720,668 sharesAverage Trading Volume2,313,174 sharesToday's Volume Vs. Average74% Short Selling Apellis Pharmaceuticals? Sign up to receive the latest short interest report for Apellis Pharmaceuticals and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartAPLS Short Interest Over TimeAPLS Days to Cover Over TimeAPLS Percentage of Float Shorted Over Time Apellis Pharmaceuticals Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/202527,250,000 shares $445.81 million -5.3%23.5%11 $16.36 4/30/202528,770,000 shares $552.67 million +7.2%N/A12.6 $19.21 4/15/202526,830,000 shares $508.97 million +19.2%23.1%13.4 $18.97 3/31/202522,510,000 shares $492.29 million +16.6%19.4%11.4 $21.87 3/15/202519,310,000 shares $476.18 million -7.3%16.7%11 $24.66 2/28/202520,820,000 shares $523.62 million +20.1%18.0%10.5 $25.15 2/15/202517,340,000 shares $475.12 million +1.6%15.0%8 $27.40 1/31/202517,060,000 shares $494.91 million -5.4%N/A6.5 $29.01 1/15/202518,040,000 shares $523.70 million -16.0%N/A6 $29.03 12/31/202421,480,000 shares $685.43 million +7.4%N/A6.9 $31.91 Get the Latest News and Ratings for APLS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Apellis Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 12/15/202420,010,000 shares $664.13 million -8.3%N/A6 $33.19 11/30/202421,810,000 shares $740.01 million -5.9%N/A6.7 $33.93 11/15/202423,180,000 shares $608.94 million +11.5%N/A7.7 $26.27 10/31/202420,790,000 shares $566.74 million -1.4%N/A8.7 $27.26 10/15/202421,090,000 shares $589.47 million +38.2%N/A9.9 $27.95 9/30/202415,260,000 shares $440.10 million -0.1%N/A7.9 $28.84 9/15/202415,280,000 shares $574.83 million -5.5%N/A9.6 $37.62 8/31/202416,170,000 shares $629.01 million -0.6%N/A11.2 $38.90 8/15/202416,270,000 shares $612.08 million +2.2%N/A11.2 $37.62 7/31/202415,920,000 shares $630.43 million +4.9%N/A10.6 $39.60 7/15/202415,170,000 shares $606.80 million +2.4%N/A10.3 $40.00 6/30/202414,810,000 shares $568.11 million +6.6%N/A10.1 $38.36 6/15/202413,900,000 shares $583.80 million +6.0%N/A10.1 $42.00 5/31/202413,120,000 shares $514.96 million +4.2%N/A9.6 $39.25 5/15/202412,590,000 shares $527.77 million +1.6%N/A8.6 $41.92 4/30/202412,390,000 shares $547.51 million +16.1%N/A8.4 $44.19 4/15/202410,670,000 shares $549.51 million +2.2%N/A8 $51.50 3/31/202410,440,000 shares $613.66 million -1.4%N/A7.1 $58.78 3/15/202410,590,000 shares $600.88 million +5.3%N/A6.7 $56.74 2/29/202410,060,000 shares $623.42 million -2.0%N/A5.1 $61.97 2/15/202410,270,000 shares $694.05 million -3.8%N/A4.9 $67.58 1/31/202410,670,000 shares $675.30 million -11.3%N/A5.1 $63.29 1/15/202412,030,000 shares $844.87 million +2.9%N/A5.4 $70.23 12/31/202311,690,000 shares $699.76 million -9.9%N/A5.1 $59.86 12/15/202312,980,000 shares $683.79 million -14.9%N/A5.2 $52.68 11/30/202315,260,000 shares $822.06 million -5.5%N/A6.4 $53.87 11/15/202316,140,000 shares $781.18 million -0.6%N/A6.9 $48.40 10/31/202316,230,000 shares $789.75 million -12.7%N/A5.2 $48.66 10/15/202318,590,000 shares $900.50 million +10.9%N/A4.5 $48.44 9/30/202316,770,000 shares $637.93 million +23.2%N/A3.3 $38.04Market Panic: Trump Just Dropped a Bomb on Your Stocks (Ad)tock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tariffs just lit the fuse. 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Google, Buffett, and a even tech billionaires like Gates, Bezos, and Zuckerberg are grabbing a stake.Find out why this could be the most lucrative "underground" energy story in America 8/13/20215,050,000 shares $290.17 million +2.9%7.5%6.4 $57.46 7/30/20214,910,000 shares $314.19 million -21.2%7.9%5.6 $63.99 7/15/20216,230,000 shares $390.18 million +4.9%10.0%7.1 $62.63 6/30/20215,940,000 shares $375.41 million -0.5%9.5%7 $63.20 6/15/20215,970,000 shares $362.08 million +6.4%9.6%7.7 $60.65 5/28/20215,610,000 shares $315.73 million -18.7%9.0%7.2 $56.28 5/14/20216,900,000 shares $314.92 million -10.6%11.0%8.9 $45.64 4/30/20217,720,000 shares $372.41 million -4.0%N/A12.1 $48.24 4/15/20218,040,000 shares $357.62 million +4.6%N/A12.4 $44.48 3/31/20217,690,000 shares $323.36 million +9.2%N/A11.7 $42.05 3/15/20217,040,000 shares $328.49 million -13.2%N/A10.7 $46.66 2/26/20218,110,000 shares $365.36 million +4.7%12.8%11.8 $45.05 2/12/20217,750,000 shares $366.73 million +1.2%12.4%11 $47.32 1/29/20217,660,000 shares $343.93 million -14.3%12.4%10.6 $44.90 1/15/20218,940,000 shares $479.18 million -1.1%15.1%12.5 $53.60 12/31/20209,040,000 shares $516.46 million +7.1%15.3%13.4 $57.13 12/15/20208,440,000 shares $439.30 million -6.6%14.3%12.3 $52.05 11/30/20209,040,000 shares $426.87 million -9.1%15.3%14.6 $47.22 11/15/20209,940,000 shares $384.98 million -2.5%16.8%16.7 $38.73 10/30/202010,190,000 shares $331.79 million -4.2%17.2%18.1 $32.56 10/15/202010,640,000 shares $376.87 million -2.4%18.0%18.6 $35.42 9/30/202010,900,000 shares $328.85 million +3.8%18.5%16.8 $30.17 9/15/202010,500,000 shares $327.60 million +1.9%17.8%15.5 $31.20 8/31/202010,300,000 shares $317.55 million +0.9%17.5%14 $30.83 8/14/202010,210,000 shares $289.76 million +0.7%17.3%13 $28.38 7/31/202010,140,000 shares $262.52 million +0.8%17.2%12 $25.89 7/15/202010,060,000 shares $321.01 million +4.4%17.1%10.9 $31.91 6/30/20209,640,000 shares $314.84 million +10.2%16.4%10.1 $32.66 6/15/20208,750,000 shares $285.16 million +7.2%14.9%9.1 $32.59 APLS Short Interest - Frequently Asked Questions What is Apellis Pharmaceuticals' current short interest? Short interest is the volume of Apellis Pharmaceuticals shares that have been sold short but have not yet been covered or closed out. As of May 15th, traders have sold 27,250,000 shares of APLS short. 23.50% of Apellis Pharmaceuticals' shares are currently sold short. Learn More on Apellis Pharmaceuticals' current short interest. What is a good short interest ratio for Apellis Pharmaceuticals? 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. APLS shares currently have a short interest ratio of 11.0. Learn More on Apellis Pharmaceuticals's short interest ratio. Which institutional investors are shorting Apellis Pharmaceuticals? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Apellis Pharmaceuticals: Jane Street Group LLC, Parallax Volatility Advisers L.P., Caption Management LLC, Walleye Trading LLC, Walleye Capital LLC, and Jefferies Financial Group Inc.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Apellis Pharmaceuticals? 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. 23.50% of Apellis Pharmaceuticals' floating shares are currently sold short. Is Apellis Pharmaceuticals' short interest increasing or decreasing? Apellis Pharmaceuticals saw a decrease in short interest in May. As of May 15th, there was short interest totaling 27,250,000 shares, a decrease of 5.3% from the previous total of 28,770,000 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 Apellis Pharmaceuticals' short interest compare to its competitors? 23.50% of Apellis Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Apellis Pharmaceuticals: Blueprint Medicines Co. (9.26%), Roivant Sciences Ltd. (11.23%), Revolution Medicines, Inc. (12.20%), Verona Pharma plc (10.60%), BridgeBio Pharma, Inc. (15.63%), Elanco Animal Health Incorporated (5.58%), Grifols, S.A. (1.46%), TG Therapeutics, Inc. (16.20%), Nuvalent, Inc. (13.13%), Legend Biotech Co. (4.15%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short Apellis Pharmaceuticals stock? Short selling APLS is an investing strategy that aims to generate trading profit from Apellis Pharmaceuticals as its price is falling. APLS shares are trading up $0.19 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 Apellis Pharmaceuticals? A short squeeze for Apellis Pharmaceuticals 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 APLS, which in turn drives the price of the stock up even further. How often is Apellis Pharmaceuticals' 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 APLS, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies BPMC Short Interest Data ROIV Short Interest Data RVMD Short Interest Data VRNA Short Interest Data BBIO Short Interest Data ELAN Short Interest Data GRFS Short Interest Data TGTX Short Interest Data NUVL Short Interest Data LEGN Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:APLS) was last updated on 6/11/2025 by MarketBeat.com Staff From Our PartnersMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? 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