ACADIA Pharmaceuticals (ACAD) Short Interest Ratio & Short Volume $22.20 -0.10 (-0.45%) Closing price 06/10/2025 04:00 PM EasternExtended Trading$22.11 -0.09 (-0.40%) As of 04:20 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 InterestTrendsBuy This Stock ACADIA Pharmaceuticals Short Interest DataACADIA Pharmaceuticals (ACAD) has a short interest of 15.24 million shares, representing 12.77% of the float (the number of shares available for trading by the public). This marks a -0.13% decrease in short interest from the previous month. The short interest ratio (days to cover) is 7.3, indicating that it would take 7.3 days of the average trading volume of 1.93 million shares to cover all short positions.Current Short Interest15,240,000 sharesPrevious Short Interest15,260,000 sharesChange Vs. Previous Month-0.13%Dollar Volume Sold Short$268.22 millionShort Interest Ratio7.3 Days to CoverLast Record DateMay 15, 2025Outstanding Shares167,362,000 sharesShort Percent of Float12.77%Today's Trading Volume1,878,945 sharesAverage Trading Volume1,934,287 sharesToday's Volume Vs. Average97% Short Selling ACADIA Pharmaceuticals? Sign up to receive the latest short interest report for ACADIA 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 ChartACAD Short Interest Over TimeACAD Days to Cover Over TimeACAD Percentage of Float Shorted Over Time ACADIA 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 5/15/202515,240,000 shares $268.22 million -0.1%12.8%7.3 $17.60 4/30/202515,260,000 shares $222.80 million -0.4%N/A8.5 $14.60 4/15/202515,320,000 shares $229.65 million -1.9%12.8%9.1 $14.99 3/31/202515,620,000 shares $259.45 million +8.3%13.1%8.5 $16.61 3/15/202514,430,000 shares $252.53 million +0.2%12.1%5.8 $17.50 2/28/202514,400,000 shares $282.24 million -5.3%12.1%5.7 $19.60 2/15/202515,210,000 shares $304.81 million -6.3%12.7%6.3 $20.04 1/31/202516,230,000 shares $302.85 million -5.2%N/A6.8 $18.66 1/15/202517,120,000 shares $299.77 million +59.7%N/A7.3 $17.51 12/31/202410,720,000 shares $196.71 million +14.5%N/A4.8 $18.35 Get the Latest News and Ratings for ACAD and Related StocksEnter your email address below to receive the latest news and analysts' ratings for ACADIA Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 12/15/20249,360,000 shares $161.55 million -5.6%N/A6.1 $17.26 11/30/20249,910,000 shares $161.73 million -3.2%N/A7.1 $16.32 11/15/202410,240,000 shares $171.72 million +7.5%N/A7.7 $16.77 10/31/20249,530,000 shares $139.04 million +16.5%N/A7 $14.59 10/15/20248,180,000 shares $121.96 million +2.5%N/A5.2 $14.91 9/30/20247,980,000 shares $122.73 million -13.5%N/A4.6 $15.38 9/15/20249,230,000 shares $150.63 million -10.1%N/A5.5 $16.32 8/31/202410,270,000 shares $170.28 million -3.7%N/A5.8 $16.58 8/15/202410,660,000 shares $164.16 million -7.4%N/A5.8 $15.40 7/31/202411,510,000 shares $218.92 million +1.6%N/A6 $19.02 7/15/202411,330,000 shares $204.28 million -5.0%N/A6.5 $18.03 6/30/202411,930,000 shares $193.86 million -5.5%N/A7.3 $16.25 6/15/202412,630,000 shares $188.31 million +4.0%N/A7.7 $14.91 5/31/202412,140,000 shares $183.31 million +1.3%N/A6.7 $15.10 5/15/202411,980,000 shares $181.14 million -0.4%N/A6.2 $15.12 4/30/202412,030,000 shares $201.02 million +7.8%N/A6.6 $16.71 4/15/202411,160,000 shares $188.49 million -0.4%N/A6.2 $16.89 3/31/202411,200,000 shares $207.09 million +5.4%N/A6.1 $18.49 3/15/202410,630,000 shares $196.44 million -1.7%N/A5.8 $18.48 2/29/202410,810,000 shares $251.22 million +14.8%N/A5.5 $23.24 2/15/20249,420,000 shares $237.20 million +22.7%N/A5.3 $25.18 1/31/20247,680,000 shares $198.99 million -5.3%N/A4.4 $25.91 1/15/20248,110,000 shares $233.00 million +2.5%N/A4.6 $28.73 12/31/20237,910,000 shares $247.66 million +2.9%N/A4.6 $31.31 12/15/20237,690,000 shares $219.78 million -0.5%N/A4 $28.58 11/30/20237,730,000 shares $172.22 million -0.8%N/A4.8 $22.28 11/15/20237,790,000 shares $175.82 million +3.3%N/A5 $22.57 10/31/20237,540,000 shares $170.18 million +4.0%N/A4.7 $22.57 10/15/20237,250,000 shares $167.77 million -19.1%N/A4.4 $23.14 9/30/20238,960,000 shares $186.73 million -16.3%N/A4.8 $20.84REVEALED FREE: Our top 3 stocks to own in 2025 and beyond (Ad)Every time Weiss Ratings flashed green like this, the average gain on each and every stock has been 303% (including the losers!). Click here for the names of our three top stocks to own this year (no purchase necessary). 9/15/202310,700,000 shares $264.50 million +5.1%N/A6.6 $24.72 8/31/202310,180,000 shares $275.06 million +4.2%N/A6.5 $27.02 8/15/20239,770,000 shares $280.59 million +10.3%N/A6 $28.72 7/31/20238,860,000 shares $259.07 million +0.9%N/A5.3 $29.24 7/15/20238,780,000 shares $282.54 million +5.0%N/A5.7 $32.18 6/30/20238,360,000 shares $200.22 million -10.9%N/A6.3 $23.95 6/15/20239,380,000 shares $228.78 million -6.6%N/A7 $24.39 5/31/202310,040,000 shares $235.94 million +0.7%N/A6.5 $23.50 5/15/20239,970,000 shares $220.54 million +3.3%N/A6.1 $22.12 4/30/20239,650,000 shares $205.83 million +0.4%6.0%6.1 $21.33 4/15/20239,610,000 shares $172.88 million +17.5%6.0%6 $17.99 3/31/20238,180,000 shares $153.95 million -3.8%5.1%5.2 $18.82 3/15/20238,500,000 shares $168.73 million +5.7%5.3%5.6 $19.85 2/28/20238,040,000 shares $166.35 million -0.3%5.0%6.3 $20.69 2/15/20238,060,000 shares $152.90 million -0.5%5.1%7.1 $18.97 1/31/20238,100,000 shares $154.14 million +1.1%5.1%6.9 $19.03 1/15/20238,010,000 shares $147.38 million -4.5%5.0%6.5 $18.40 12/30/20228,390,000 shares $133.57 million -3.6%5.3%6.8 $15.92 12/15/20228,700,000 shares $131.11 million -10.0%5.5%6.6 $15.07 11/30/20229,670,000 shares $150.66 million +7.0%6.1%7 $15.58 11/15/20229,040,000 shares $141.84 million -13.4%5.7%6.2 $15.69 10/31/202210,440,000 shares $167.35 million +9.7%6.5%6.7 $16.03 10/15/20229,520,000 shares $149.65 million -1.7%6.0%6.1 $15.72 9/30/20229,680,000 shares $158.36 million +0.8%6.1%5.9 $16.36 9/15/20229,600,000 shares $175.39 million -3.7%6.0%5.4 $18.27 8/31/20229,970,000 shares $163.81 million -1.5%6.3%3.9 $16.43 8/15/202210,120,000 shares $167.99 million +4.7%6.4%3.9 $16.60 7/31/20229,670,000 shares $142.05 million -0.5%6.8%3.7 $14.69 7/15/20229,720,000 shares $148.52 million -7.0%6.8%3.7 $15.28 6/30/202210,450,000 shares $147.24 million -10.8%7.3%4 $14.09 6/15/202211,720,000 shares $219.98 million -9.1%8.2%4.7 $18.77 5/31/202212,890,000 shares $208.17 million -1.0%8.1%7.7 $16.15 5/15/202213,020,000 shares $219.39 million +8.5%8.2%8 $16.85 4/30/202212,000,000 shares $221.28 million +48.0%7.5%7.6 $18.44 4/15/20228,110,000 shares $190.34 million +17.7%5.1%5.3 $23.47 3/31/20226,890,000 shares $166.88 million -3.1%4.3%4.7 $24.22 3/15/20227,110,000 shares $163.89 million +17.9%4.4%4.4 $23.05 2/28/20226,030,000 shares $153.22 million +1.3%3.8%3.5 $25.41 2/15/20225,950,000 shares $162.32 million +6.6%3.7%3.6 $27.28 1/31/20225,580,000 shares $125.49 million -17.3%3.5%3.3 $22.49 1/15/20226,750,000 shares $155.59 million +2.0%4.2%4.1 $23.05 12/31/20216,620,000 shares $154.51 million +1.9%4.1%4.1 $23.34 12/15/20216,500,000 shares $158.47 million +11.9%4.1%4 $24.38 11/30/20215,810,000 shares $111.55 million -20.6%3.6%4.4 $19.20 11/15/20217,320,000 shares $144.72 million -6.5%4.6%5.9 $19.77 10/29/20217,830,000 shares $140.55 million +3.2%4.9%6.3 $17.95 10/15/20217,590,000 shares $132.90 million +6.8%4.8%5.8 $17.51 9/30/20217,110,000 shares $118.10 million +1.3%4.5%5.5 $16.61 9/15/20217,020,000 shares $111.62 million -3.6%4.4%4.5 $15.90 8/31/20217,280,000 shares $127.47 million -7.7%4.6%4.6 $17.51The Robotics Revolution has arrived … and one $7 stock could take off as a result. 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Click here to find out more. 8/13/20217,890,000 shares $138.71 million -2.6%4.9%4.8 $17.58 7/30/20218,100,000 shares $175.20 million +0.9%5.1%4.7 $21.63 7/15/20218,030,000 shares $185.97 million -1.7%5.0%4.6 $23.16 6/30/20218,170,000 shares $199.27 million +36.9%5.1%4.3 $24.39 6/15/20215,970,000 shares $156.83 million +2.9%3.7%3 $26.27 5/28/20215,800,000 shares $129.57 million -20.0%3.6%2.6 $22.34 5/14/20217,250,000 shares $153.85 million -3.3%N/A2.7 $21.22 4/30/20217,500,000 shares $154.43 million -6.1%N/A2.9 $20.59 4/15/20217,990,000 shares $170.03 million +14.0%N/A3.3 $21.28 3/31/20217,010,000 shares $180.23 million +7.5%N/A3.1 $25.71 3/15/20216,520,000 shares $176.30 million -1.4%N/A3.6 $27.04 2/26/20216,610,000 shares $312.72 million +7.8%N/A5 $47.31 2/12/20216,130,000 shares $314.10 million +1.0%N/A6.8 $51.24 1/29/20216,070,000 shares $300.71 million -2.6%N/A6.4 $49.54 1/15/20216,230,000 shares $339.29 million -1.6%N/A6.2 $54.46 12/31/20206,330,000 shares $339.86 million -10.0%N/A6.4 $53.69 12/15/20207,030,000 shares $366.47 million -10.3%N/A7 $52.13 11/30/20207,840,000 shares $439.04 million -2.0%N/A7.6 $56.00 11/15/20208,000,000 shares $412.56 million -9.5%N/A7.6 $51.57 10/30/20208,840,000 shares $418.57 million -0.6%N/A7.8 $47.35 10/15/20208,890,000 shares $381.56 million -3.5%N/A7.6 $42.92 9/30/20209,210,000 shares $379.91 million +2.7%N/A6.5 $41.25 9/15/20208,970,000 shares $347.95 million -4.0%N/A4.8 $38.79 8/31/20209,340,000 shares $369.77 million -0.2%N/A5 $39.59 8/14/20209,360,000 shares $368.32 million -5.4%N/A5 $39.35 7/31/20209,890,000 shares $411.13 million +4.1%N/A5.6 $41.57 7/15/20209,500,000 shares $523.74 million -3.3%N/A5.5 $55.13 6/30/20209,820,000 shares $475.98 million -14.5%N/A6.3 $48.47 6/15/202011,490,000 shares $534.17 million +2.3%N/A9.2 $46.49 ACAD Short Interest - Frequently Asked Questions What is ACADIA Pharmaceuticals' current short interest? Short interest is the volume of ACADIA Pharmaceuticals shares that have been sold short but have not yet been closed out or covered. As of May 15th, investors have sold 15,240,000 shares of ACAD short. 12.77% of ACADIA Pharmaceuticals' shares are currently sold short. Learn More on ACADIA Pharmaceuticals' current short interest. What is a good short interest ratio for ACADIA 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. ACAD shares currently have a short interest ratio of 7.0. Learn More on ACADIA Pharmaceuticals's short interest ratio. Which institutional investors are shorting ACADIA Pharmaceuticals? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of ACADIA Pharmaceuticals: Jane Street Group LLC, Goldman Sachs Group Inc., Caption Management LLC, Simplex Trading LLC, and Citigroup Inc.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for ACADIA 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. 12.77% of ACADIA Pharmaceuticals' floating shares are currently sold short. Is ACADIA Pharmaceuticals' short interest increasing or decreasing? ACADIA Pharmaceuticals saw a decrease in short interest during the month of May. As of May 15th, there was short interest totaling 15,240,000 shares, a decrease of 0.1% from the previous total of 15,260,000 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 ACADIA Pharmaceuticals' short interest compare to its competitors? 12.77% of ACADIA Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to ACADIA Pharmaceuticals: Intra-Cellular Therapies, Inc. (2.58%), Genmab A/S (0.45%), Summit Therapeutics Inc. (29.82%), Dr. Reddy's Laboratories Limited (1.83%), Ascendis Pharma A/S (10.33%), Moderna, Inc. (19.64%), Viatris Inc. (4.53%), Qiagen (2.81%), Blueprint Medicines Co. (9.26%), Roivant Sciences Ltd. (11.23%), 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 ACADIA Pharmaceuticals stock? Short selling ACAD is an investing strategy that aims to generate trading profit from ACADIA Pharmaceuticals as its price is falling. ACAD shares are trading down $0.10 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 ACADIA Pharmaceuticals? A short squeeze for ACADIA 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 ACAD, which in turn drives the price of the stock up even further. How often is ACADIA 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 ACAD, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies Intra-Cellular Therapies Short Interest Genmab A/S Short Interest Summit Therapeutics Short Interest Dr. Reddy's Laboratories Short Interest Ascendis Pharma A/S Short Interest Moderna Short Interest Viatris Short Interest Qiagen Short Interest Blueprint Medicines Short Interest Roivant Sciences Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:ACAD) 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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