ACADIA Pharmaceuticals (ACAD) Short Interest Ratio & Short Volume $23.53 -0.30 (-1.26%) Closing price 08/1/2025 04:00 PM EasternExtended Trading$23.17 -0.36 (-1.53%) As of 08/1/2025 07:12 PM 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 ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock ACADIA Pharmaceuticals Short Interest DataACADIA Pharmaceuticals (ACAD) has a short interest of 11.48 million shares. This marks a -10.52% decrease in short interest from the previous month. The short interest ratio (days to cover) is 5.3, indicating that it would take 5.3 days of the average trading volume of 1.63 million shares to cover all short positions.Current Short Interest11,480,000 sharesPrevious Short Interest12,830,000 sharesChange Vs. Previous Month-10.52%Dollar Volume Sold Short$252.67 millionShort Interest Ratio5.3 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares167,360,000 sharesPercentage of Shares Shorted6.86%Today's Trading Volume1,750,031 sharesAverage Trading Volume1,634,986 sharesToday's Volume Vs. Average107% 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 7/15/202511,480,000 shares $252.67 million -10.5%N/A5.3 $22.01 6/30/202512,830,000 shares $276.74 million -16.9%10.4%5.9 $21.57 6/15/202515,440,000 shares $335.20 million -7.3%12.6%7.3 $21.71 5/31/202516,660,000 shares $359.86 million +9.3%14.0%8.1 $21.60 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 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. 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 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 $22.28BREAKING: The House just passed 3 pro-crypto bills! (Ad)THREE pro-crypto bills just passed the House! Now, experts believe altcoin season is officially here. Discover the under-the-radar project I believe will skyrocket as a result. 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 $20.84 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 $17.95BREAKING: The House just passed 3 pro-crypto bills! (Ad)THREE pro-crypto bills just passed the House! Now, experts believe altcoin season is officially here. Discover the under-the-radar project I believe will skyrocket as a result. 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 $17.51 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 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 covered or closed out. As of July 15th, investors have sold 11,480,000 shares of ACAD 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 5.0. 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. Is ACADIA Pharmaceuticals' short interest increasing or decreasing? ACADIA Pharmaceuticals saw a drop in short interest in the month of July. As of July 15th, there was short interest totaling 11,480,000 shares, a drop of 10.5% from the previous total of 12,830,000 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? Here is how the short interest of companies in the industry of "pharmaceutical products" compare to ACADIA Pharmaceuticals: Genmab A/S Sponsored ADR (0.60%), Moderna, Inc. (19.34%), Dr. Reddy's Laboratories Ltd (1.46%), Qiagen N.V. (2.93%), Viatris Inc. (3.32%), Ascendis Pharma A/S (4.46%), Verona Pharma PLC American Depositary Share (4.77%), BridgeBio Pharma, Inc. (10.26%), Blueprint Medicines Corporation (5.95%), Roivant Sciences Ltd. (10.56%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Coinbase Global, Inc. ($5.11 billion), Charter Communications, Inc. ($4.76 billion), Reddit Inc. ($2.84 billion), SoFi Technologies, Inc. ($2.79 billion), Seagate Technology Holdings PLC ($2.79 billion), Live Nation Entertainment, Inc. ($2.67 billion), Rocket Lab Corporation ($2.49 billion), AST SpaceMobile, Inc. ($2.12 billion), Moderna, Inc. ($2.09 billion), and Omnicom Group Inc. ($2.04 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 $0.30 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 appreciates 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 July, 15 2025. More Short Interest Resources from MarketBeat Related Companies Genmab A/S Short Interest Moderna Short Interest Dr. Reddy's Laboratories Short Interest Qiagen Short Interest Viatris Short Interest Ascendis Pharma A/S Short Interest Verona Pharma PLC American Depositary Share Short Interest BridgeBio Pharma 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 8/2/2025 by MarketBeat.com Staff From Our PartnersIs Elon's empire crumbling?The Tesla Shock Nobody Sees Coming While headlines scream "Tesla is doomed"... 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