Alterity Therapeutics (ATHE) Short Interest Ratio & Short Volume $5.01 +0.28 (+5.92%) Closing price 10/15/2025 04:00 PM EasternExtended Trading$5.04 +0.03 (+0.50%) As of 05:09 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 ForecastsChartCompetitorsFDA EventsHeadlinesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Alterity Therapeutics Short Interest DataAlterity Therapeutics (ATHE) has a short interest of 71,200 shares, representing 0.41% of the float (the number of shares available for trading by the public). This marks a -21.67% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.9, indicating that it would take 0.9 days of the average trading volume of 240,155 shares to cover all short positions.Current Short Interest71,200 sharesPrevious Short Interest90,900 sharesChange Vs. Previous Month-21.67%Dollar Volume Sold Short$330.37 thousandShort Interest Ratio0.9 Days to CoverLast Record DateSeptember 15, 2025Outstanding Shares8,870,000 sharesFloat Size17,280,000 sharesShort Percent of Float0.41%Today's Trading Volume74,002 sharesAverage Trading Volume240,155 sharesToday's Volume Vs. Average31% Short Selling Alterity Therapeutics? Sign up to receive the latest short interest report for Alterity Therapeutics and its competitors with MarketBeat's FREE newsletter. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartATHE Short Interest Over TimeATHE Days to Cover Over TimeATHE Percentage of Float Shorted Over Time Alterity Therapeutics Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/15/202571,200 shares $330.37 thousand -21.7%0.4%0.9 $4.64 8/31/202590,900 shares $449.05 thousand -14.3%0.6%1.2 $4.94 8/15/2025106,100 shares $552.78 thousand -24.7%0.7%1.3 $5.21 7/31/2025140,900 shares $712.95 thousand -9.2%1.0%1.7 $5.06 7/15/2025155,100 shares $693.30 thousand +20.3%1.1%2.4 $4.47 6/30/2025128,900 shares $527.20 thousand +10.4%0.9%3 $4.09 6/15/2025116,800 shares $513.92 thousand -8.6%0.8%2.8 $4.40 5/31/2025127,800 shares $569.99 thousand +2.9%0.9%3.2 $4.46 5/15/2025124,200 shares $470.72 thousand +147.9%0.9%2.9 $3.79 4/30/202550,100 shares $173.35 thousand -11.8%0.4%1.1 $3.46 Get the Latest News and Ratings for ATHE and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Alterity Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 4/15/202556,800 shares $187.44 thousand +32.7%0.4%0.1 $3.30 3/31/202542,800 shares $145.13 thousand -21.6%0.3%0.1 $3.39 3/15/202554,600 shares $215.12 thousand -46.4%0.5%0.1 $3.94 2/28/2025101,800 shares $403.54 thousand -36.2%1.0%0.2 $3.96 2/15/2025159,500 shares $704.99 thousand -71.2%1.5%0.4 $4.42 1/31/2025553,500 shares $2.66 million +556.6%6.4%1.2 $4.80 1/15/202584,300 shares $279.03 thousand -49.6%1.0%1.3 $3.31 12/31/2024167,300 shares $553.76 thousand +12.6%2.0%2.6 $3.31 12/15/2024148,600 shares $356.64 thousand +7,330.0%1.8%3.2 $2.40 11/30/20242,000 shares $2.82 thousand -46.0%0.0%0 $1.41 11/15/20243,700 shares $4.09 thousand +2.8%0.0%0.3 $1.11 10/31/20243,600 shares $4.14 thousand -41.9%0.0%0.3 $1.15 10/15/20246,200 shares $7.81 thousand -36.1%0.1%0.4 $1.26 9/30/20249,700 shares $12.73 thousand -22.4%0.1%0.3 $1.31 9/15/202412,500 shares $15.75 thousand -40.5%0.2%0.4 $1.26 8/31/202421,000 shares $31.29 thousand -8.7%0.3%0.6 $1.49 8/15/202423,000 shares $31.74 thousand -18.2%0.3%0.7 $1.38 7/31/202428,100 shares $44.96 thousand +57.0%0.3%0.8 $1.60 7/15/202417,900 shares $35.98 thousand +33.6%0.2%0.4 $2.01 6/30/202413,400 shares $24.25 thousand -40.4%0.2%0.2 $1.81 6/15/202422,500 shares $41.85 thousand +8.2%0.3%0.3 $1.86 5/31/202420,800 shares $38.90 thousand -40.6%0.3%0.3 $1.87 5/15/202435,000 shares $71.40 thousand -59.3%0.4%0.4 $2.04 4/30/202485,900 shares $179.96 thousand -4.9%1.0%1.1 $2.10 4/15/202490,300 shares $221.24 thousand +290.9%1.1%1.1 $2.45 3/31/202423,100 shares $47.82 thousand -12.5%0.3%0.6 $2.07 3/15/202426,400 shares $46.46 thousand +47.5%0.3%0.6 $1.76 2/29/202417,900 shares $33.47 thousand -52.7%0.2%0.3 $1.87 2/15/202437,800 shares $76.36 thousand +25.6%0.5%0.1 $2.02 1/31/202430,100 shares $63.51 thousand +85.8%N/A0 $2.11 1/15/202416,200 shares $30.78 thousand -77.0%0.3%0 $1.90 12/31/202370,500 shares $175.55 thousand +22.8%1.2%0.1 $2.49 12/15/202357,400 shares $173.92 thousand +12.6%1.3%0.1 $3.03 11/30/202351,000 shares $92.31 thousand +684.6%1.2%0.1 $1.81 11/15/20236,500 shares $15.93 thousand -11.0%0.2%1.2 $2.45 10/31/20237,300 shares $17.02 thousand -32.4%0.2%2.6 $2.33 10/15/202310,800 shares $26.24 thousand -12.9%0.3%3.4 $2.43 9/30/202312,400 shares $30.75 thousand -13.3%0.3%3.2 $2.48 9/15/202314,300 shares $37.18 thousand -14.4%0.4%3.6 $2.60 8/31/202316,700 shares $45.26 thousand -13.0%0.4%3.9 $2.71 8/15/202319,200 shares $54.53 thousand +12.9%0.5%4 $2.84 7/31/202317,000 shares $49.30 thousand +54.6%0.4%3.7 $2.90 7/15/202311,000 shares $31.13 thousand +15.8%0.3%2.3 $2.83 6/30/20239,500 shares $26.51 thousand -41.7%0.2%2.2 $2.79 6/15/202316,300 shares $47.11 thousand +6.5%0.4%2.3 $2.89 5/31/202315,300 shares $44.52 thousand +1.3%0.4%0.9 $2.91 5/15/202315,100 shares $43.79 thousand +0.7%0.4%0.9 $2.90 4/30/202315,000 shares $42.00 thousand -35.3%0.4%0.7 $2.80 4/15/202323,200 shares $66.82 thousand -27.3%0.6%1 $2.88 3/31/202331,900 shares $88.68 thousand +423.0%0.8%1.1 $2.78 3/15/20236,100 shares $15.92 thousand -14.1%0.2%0.2 $2.61 2/28/20237,100 shares $22.79 thousand +6.0%0.2%0.4 $3.21 2/15/20236,700 shares $20.17 thousand -22.1%0.2%0.4 $3.01 1/31/20238,600 shares $33.63 thousand -34.4%0.2%0.5 $3.91 1/15/202313,100 shares $54.37 thousand +10.1%0.3%1 $4.15 12/30/202211,900 shares $41.44 thousand -90.5%N/A1.1 $3.48 12/15/2022125,500 shares $40.17 thousand -3.9%N/A2.2 $0.32 11/30/2022130,600 shares $47.33 thousand -15.3%N/A1.5 $0.36 11/15/2022154,100 shares $61.64 thousand -33.1%N/A1.6 $0.40 10/31/2022230,200 shares $90.45 thousand -6.9%N/A2.3 $0.39 10/15/2022247,200 shares $113.69 thousand -2.4%N/A2.3 $0.46 9/30/2022253,200 shares $111.43 thousand -4.3%N/A2.3 $0.44 9/15/2022264,700 shares $153.47 thousand +22.5%N/A2.3 $0.58 8/31/2022216,100 shares $121.04 thousand +27.5%N/A2.5 $0.56 8/15/2022169,500 shares $105.12 thousand -34.9%N/A2.3 $0.62 7/31/2022260,300 shares $156.96 thousand +0.4%N/A3.5 $0.60 7/15/2022259,300 shares $163.36 thousand +9.7%N/A2.8 $0.63 6/30/2022236,400 shares $144.44 thousand +36.5%N/A2.8 $0.61 6/15/2022173,200 shares $107.42 thousand -30.2%N/A2 $0.62 5/31/2022248,000 shares $166.16 thousand -13.9%N/A2.8 $0.67 5/15/2022287,900 shares $190.76 thousand -25.4%N/A2.7 $0.66 4/30/2022385,700 shares $284.30 thousand +63.5%N/A2.9 $0.74 4/15/2022235,900 shares $184.00 thousand -7.6%N/A1.8 $0.78 3/31/2022255,200 shares $211.56 thousand +13.8%N/A0.1 $0.83 3/15/2022224,200 shares $159.74 thousand -37.9%N/A0.1 $0.71 2/28/2022360,800 shares $306.68 thousand -22.9%N/A0.2 $0.85 2/15/2022467,900 shares $427.66 thousand -24.4%N/A0.2 $0.91 1/31/2022619,200 shares $582.23 thousand -44.7%N/A0.3 $0.94 1/15/20221,120,000 shares $909.22 thousand +231.1%N/A0.4 $0.81 12/31/2021338,300 shares $243.58 thousand -16.6%N/A0.1 $0.72 12/15/2021405,600 shares $349.63 thousand -32.1%N/A1 $0.86 11/30/2021597,000 shares $579.09 thousand -2.4%N/A1.3 $0.97 11/15/2021611,900 shares $712.50 thousand -25.9%N/A1.3 $1.16 10/29/2021826,100 shares $1.01 million +19.1%N/A1.6 $1.22 10/15/2021693,500 shares $908.49 thousand -6.4%N/A0.5 $1.31 9/30/2021740,700 shares $940.69 thousand -13.0%N/A0.4 $1.27 9/15/2021851,600 shares $1.10 million +1.1%N/A0.1 $1.29 8/31/2021842,100 shares $1.15 million -11.4%N/A0.1 $1.36 8/13/2021950,600 shares $1.28 million -8.6%N/A0.1 $1.35 7/30/20211,040,000 shares $1.34 million -9.6%N/A0.2 $1.29 7/15/20211,150,000 shares $1.73 million +108.0%N/A0.2 $1.50 6/30/2021552,800 shares $718.64 thousand -13.4%N/A0.1 $1.30 6/15/2021638,400 shares $874.61 thousand +9.6%N/A0.4 $1.37 5/28/2021582,300 shares $780.28 thousand -9.3%N/A0.4 $1.34 5/14/2021642,200 shares $732.11 thousand -28.3%N/A0.4 $1.14 4/30/2021895,500 shares $1.33 million +304.1%N/A0.5 $1.49 4/15/2021221,600 shares $292.51 thousand +31.0%N/A0.1 $1.32 3/31/2021169,200 shares $240.26 thousand +18.0%N/A0.3 $1.42 3/15/2021143,400 shares $246.65 thousand +412.1%N/A0.2 $1.72 2/26/202128,000 shares $47.32 thousand -71.6%N/A0 $1.69 2/12/202198,700 shares $203.32 thousand +961.3%N/A0.1 $2.06 1/29/20219,300 shares $15.72 thousand -90.6%N/A0 $1.69 1/15/202199,200 shares $174.59 thousand +91.1%N/A0 $1.76 12/31/202051,900 shares $72.66 thousand -10.1%N/A0 $1.40 12/15/202057,700 shares $86.55 thousand -84.0%N/A0 $1.50 11/30/2020360,800 shares $559.24 thousand +574.4%N/A0.2 $1.55 11/15/202053,500 shares $61.53 thousand +29.5%N/A0 $1.15 10/30/202041,300 shares $56.99 thousand +1,232.3%N/A0.4 $1.38 ATHE Short Interest - Frequently Asked Questions What is Alterity Therapeutics' current short interest? Short interest is the volume of Alterity Therapeutics shares that have been sold short but have not yet been covered or closed out. As of September 15th, investors have sold 71,200 shares of ATHE short. 0.41% of Alterity Therapeutics' shares are currently sold short. Learn More on Alterity Therapeutics' current short interest. What is a good short interest ratio for Alterity Therapeutics? 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. ATHE shares currently have a short interest ratio of 1.0. Learn More on Alterity Therapeutics's short interest ratio. What is a good short interest percentage for Alterity Therapeutics? 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. 0.41% of Alterity Therapeutics' floating shares are currently sold short. Is Alterity Therapeutics' short interest increasing or decreasing? Alterity Therapeutics saw a drop in short interest in the month of September. As of September 15th, there was short interest totaling 71,200 shares, a drop of 21.7% from the previous total of 90,900 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. What is Alterity Therapeutics' float size? Alterity Therapeutics currently has issued a total of 8,870,000 shares. Some of Alterity Therapeutics' outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Alterity Therapeutics currently has a public float of 17,280,000 shares. How does Alterity Therapeutics' short interest compare to its competitors? 0.41% of Alterity Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Alterity Therapeutics: Cardiff Oncology, Inc. (22.94%), biote Corp. (2.79%), Zhengye Biotechnology Holding Limited (4.29%), Oncolytics Biotech Inc. (2.61%), Tevogen Bio Holdings Inc. (4.91%), Atossa Genetics Inc. (2.17%), TuHURA Biosciences, Inc. (7.73%), Spruce Biosciences, Inc. (0.22%), Instil Bio, Inc. (24.51%), Climb Bio, Inc. (1.50%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Corporation ($8.81 billion), Canadian Natural Resources Limited ($5.82 billion), Reddit Inc. ($5.19 billion), Coinbase Global, Inc. ($4.52 billion), Robinhood Markets, Inc. ($4.30 billion), Charter Communications, Inc. ($3.75 billion), CoreWeave Inc. ($3.66 billion), Seagate Technology Holdings PLC ($3.57 billion), Live Nation Entertainment, Inc. ($3.33 billion), and Rocket Lab Corporation ($3.26 billion). View all of the most shorted stocks. What does it mean to sell short Alterity Therapeutics stock? Short selling ATHE is an investing strategy that aims to generate trading profit from Alterity Therapeutics as its price is falling. ATHE shares are trading up $0.28 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 Alterity Therapeutics? A short squeeze for Alterity Therapeutics 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 ATHE, which in turn drives the price of the stock up even further. How often is Alterity Therapeutics' 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 ATHE, twice per month. The most recent reporting period available is September, 15 2025. More Short Interest Resources from MarketBeat Related Companies Cardiff Oncology Short Interest Data biote Short Interest Data Zhengye Biotechnology Short Interest Data Oncolytics Biotech Short Interest Data Tevogen Bio Short Interest Data Atossa Genetics Short Interest Data TuHURA Biosciences Short Interest Data Spruce Biosciences Short Interest Data Instil Bio Short Interest Data Climb Bio 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:ATHE) was last updated on 10/16/2025 by MarketBeat.com Staff From Our PartnersURGENT: The Market's 3 Red Flags Are FlashingHere’s the uncomfortable truth: The smartest investors in the world are already preparing for a crash befor...StockEarnings | SponsoredOctober 16 Changes the Microchip Game — and InvestingWhile everyone's chasing the same AI plays, George Gilder is focused on something completely different. 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