Aptose Biosciences (APTO) Short Interest Ratio & Short Volume Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Aptose Biosciences Short Interest DataAptose Biosciences (APTO) has a short interest of 53,200 shares, representing 3.30% of the float (the number of shares available for trading by the public). This marks a -56.61% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.1, indicating that it would take 0.1 days of the average trading volume of 227,964 shares to cover all short positions.Current Short Interest53,200 sharesPrevious Short Interest122,600 sharesChange Vs. Previous Month-56.61%Dollar Volume Sold Short$196,308.00Short Interest Ratio0.1 Days to CoverLast Record DateMarch 15, 2025Outstanding Shares2,141,000 sharesFloat Size1,610,000 sharesShort Percent of Float3.30%Today's Trading Volume650,294 sharesAverage Trading Volume227,964 sharesToday's Volume Vs. Average285% Short Selling Aptose Biosciences? Sign up to receive the latest short interest report for Aptose Biosciences and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartAPTO Short Interest Over TimeAPTO Days to Cover Over TimeAPTO Percentage of Float Shorted Over Time Aptose Biosciences Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 3/15/202553,200 shares $196,308.00 -56.6%3.3%0.1 $3.69 2/28/2025122,600 shares $391,094.00 +63.7%6.1%0.3 $3.19 2/15/202574,900 shares $404,460.00 -92.5%3.7%0.2 $5.40 1/31/2025993,200 shares $174,803.20 -24.2%1.8%0.2 $0.18 1/15/20251,310,000 shares $269,991.00 -37.3%2.3%0.2 $0.21 12/31/20242,090,000 shares $470,877.00 +1,012.9%3.7%0.3 $0.23 12/15/2024187,800 shares $36,245.40 +84.5%0.3%0 $0.19 11/30/2024101,800 shares $18,324.00 -15.7%0.2%0.2 $0.18 11/15/2024120,700 shares $44,049.34 -2.0%0.8%0.2 $0.36 10/31/2024123,200 shares $46,902.24 -36.1%0.8%0.2 $0.38 Get the Latest News and Ratings for APTO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Aptose Biosciences and its competitors with MarketBeat's FREE daily newsletter. 10/15/2024192,700 shares $71,106.30 -6.4%1.3%0.4 $0.37 9/30/2024205,900 shares $84,604.31 -74.9%1.4%0.4 $0.41 9/15/2024818,700 shares $305,948.19 +520.2%5.5%1.5 $0.37 8/31/2024132,000 shares $53,592.00 +167.2%0.9%0.3 $0.41 8/15/202449,400 shares $23,870.08 -45.8%0.3%0.6 $0.48 7/31/202491,200 shares $52,713.60 +12.9%0.6%1.2 $0.58 7/15/202480,800 shares $56,802.40 -13.1%0.5%1.2 $0.70 6/30/202493,000 shares $70,587.00 -17.6%0.6%1.6 $0.76 6/15/2024112,800 shares $100,392.00 +46.5%0.8%1.6 $0.89 5/31/202477,000 shares $75,075.00 +13.1%0.5%1.2 $0.98 5/15/202468,100 shares $82,401.00 -18.4%0.7%1 $1.21 4/30/202483,500 shares $100,200.00 +52.1%0.9%1.1 $1.20 4/15/202454,900 shares $71,370.00 -35.9%0.6%0.6 $1.30 3/31/202485,600 shares $142,096.00 +70.5%0.9%0.9 $1.66 3/15/202450,200 shares $76,304.00 -28.7%0.5%0.5 $1.52 2/29/202470,400 shares $126,720.00 -22.3%0.8%0.8 $1.80 2/15/202490,600 shares $183,265.68 -53.0%1.0%1 $2.02 1/31/2024192,600 shares $385,200.00 +31.9%6.2%2.5 $2.00 1/15/2024146,000 shares $332,880.00 +66.5%4.0%2.6 $2.28 12/31/202387,700 shares $222,758.00 +32.3%2.4%1.6 $2.54 12/15/202366,300 shares $157,131.00 +193.4%1.8%1.3 $2.37 11/30/202322,600 shares $54,918.00 -25.9%0.7%0.5 $2.43 11/15/202330,500 shares $82,655.00 -27.2%1.0%0.8 $2.71 10/31/202341,900 shares $116,901.00 +37.8%1.7%1 $2.79 10/15/202330,400 shares $65,056.00 -24.4%1.2%0.7 $2.14 9/30/202340,200 shares $112,560.00 +37.7%1.8%1 $2.80 9/15/202329,200 shares $96,068.00 -22.8%1.3%0.7 $3.29 8/31/202337,800 shares $153,090.00 -7.1%1.8%0.8 $4.05 8/15/202340,700 shares $199,430.00 -12.9%1.3%0.9 $4.90 7/31/202346,700 shares $144,770.00 -28.4%2.2%1.1 $3.10Trump purposefully forcing markets to crash… (Ad)Whether you agree with the plan or not doesn’t matter. 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The only question is – are you ready for it?Click here to find out how to survive “Trump’s Reset” 7/15/202365,200 shares $288,836.00 -18.2%3.1%1.8 $4.43 6/30/202379,700 shares $369,808.00 -3.4%1.4%2.5 $4.64 6/15/202382,500 shares $485,925.00 +167.0%1.4%2.9 $5.89 5/31/202330,900 shares $190,035.00 -88.3%N/A1.6 $6.15 5/15/2023264,100 shares $124,655.20 +44.6%0.3%1.5 $0.47 4/30/2023182,700 shares $88,189.29 +11.3%0.2%1.1 $0.48 4/15/2023164,100 shares $84,027.41 -37.4%0.2%0.9 $0.51 3/31/2023262,200 shares $167,808.00 +53.3%0.3%1.4 $0.64 3/15/2023171,000 shares $99,180.00 -3.0%0.2%0.8 $0.58 2/28/2023176,200 shares $102,548.40 +0.7%0.2%0.6 $0.58 2/15/2023175,000 shares $119,000.00 -13.9%0.2%0.6 $0.68 1/31/2023203,300 shares $152,475.00 -74.0%0.2%0.7 $0.75 1/15/2023782,400 shares $547,680.00 -19.6%0.9%1.8 $0.70 12/30/2022973,500 shares $564,630.00 -3.6%N/A2.3 $0.58 12/15/20221,010,000 shares $591,153.00 +29.1%N/A2.5 $0.59 11/30/2022782,300 shares $520,229.50 +13.0%N/A2.2 $0.67 11/15/2022692,100 shares $472,289.04 +163.7%N/A1.9 $0.68 10/31/2022262,500 shares $120,881.25 -4.0%N/A0.7 $0.46 10/15/2022273,300 shares $155,808.33 +14.6%N/A1.3 $0.57 9/30/2022238,400 shares $141,848.00 -2.9%N/A1.3 $0.60 9/15/2022245,600 shares $170,937.60 +18.7%N/A1.3 $0.70 8/31/2022206,900 shares $161,795.80 -15.9%N/A1 $0.78 8/15/2022245,900 shares $213,933.00 -16.7%N/A1.1 $0.87 7/31/2022295,100 shares $218,993.71 +10.5%N/A1.1 $0.74 7/15/2022267,100 shares $223,055.21 +4.8%N/A0.9 $0.84 6/30/2022255,000 shares $189,235.50 -38.2%N/A0.7 $0.74 6/15/2022412,300 shares $349,671.63 -16.3%N/A1 $0.85 5/31/2022492,500 shares $497,425.00 +0.4%0.6%1.2 $1.01 5/15/2022490,800 shares $510,432.00 +5.0%0.6%1.2 $1.04 4/30/2022467,500 shares $556,325.00 +5.9%0.6%1.1 $1.19 4/15/2022441,500 shares $551,875.00 +3.8%0.5%1.1 $1.25 3/31/2022425,400 shares $578,544.00 -4.8%0.5%1 $1.36 3/15/2022446,600 shares $473,396.00 -21.7%0.6%0.9 $1.06 2/28/2022570,400 shares $684,480.00 +2.8%0.7%0.6 $1.20 2/15/2022554,900 shares $682,527.00 -5.7%0.7%0.6 $1.23 1/31/2022588,200 shares $764,660.00 -3.8%0.7%0.5 $1.30 1/15/2022611,700 shares $819,678.00 -4.2%0.8%0.5 $1.34 12/31/2021638,400 shares $861,840.00 -11.7%0.8%0.5 $1.35 12/15/2021722,700 shares $860,013.00 -2.9%0.9%0.6 $1.19 11/30/2021744,300 shares $1.64 million -16.3%0.9%0.9 $2.20 11/15/2021889,100 shares $2.29 million -5.2%1.1%1 $2.58 10/29/2021937,600 shares $1.92 million +2.4%1.2%1 $2.05 10/15/2021916,100 shares $2.11 million +16.6%1.2%1 $2.30 9/30/2021785,600 shares $1.71 million -16.7%1.0%0.8 $2.18 9/15/2021942,600 shares $2.55 million -7.6%1.2%0.9 $2.71 8/31/20211,020,000 shares $3.05 million -12.8%1.3%0.7 $2.99 8/13/20211,170,000 shares $3.08 million -7.9%1.5%0.9 $2.63 7/30/20211,270,000 shares $3.42 million -24.4%1.7%1 $2.69 7/15/20211,680,000 shares $4.80 million -42.3%2.0%1.4 $2.86 6/30/20212,910,000 shares $9.66 million -4.0%3.5%2.4 $3.32Trump purposefully forcing markets to crash… (Ad)Whether you agree with the plan or not doesn’t matter. 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The only question is – are you ready for it?Click here to find out how to survive “Trump’s Reset” 6/15/20213,030,000 shares $10.61 million -1.3%3.7%0.7 $3.50 5/28/20213,070,000 shares $16.27 million -1.3%3.7%0.8 $5.30 5/14/20213,110,000 shares $14.37 million -7.4%3.8%0.8 $4.62 4/30/20213,360,000 shares $18.92 million -8.9%4.1%0.8 $5.63 4/15/20213,690,000 shares $19.22 million -23.1%4.5%0.9 $5.21 3/31/20214,800,000 shares $29.86 million +98.4%5.9%1.1 $6.22 3/15/20212,420,000 shares $9.56 million +8.0%3.0%0.6 $3.95 2/26/20212,240,000 shares $8.92 million +1.8%2.7%1.5 $3.98 2/12/20212,200,000 shares $10.23 million -26.7%2.7%1.5 $4.65 1/29/20213,000,000 shares $12.75 million -11.8%3.6%1.9 $4.25 1/15/20213,400,000 shares $14.93 million -24.8%4.0%2.1 $4.39 12/31/20204,520,000 shares $19.26 million -3.8%5.4%2.8 $4.26 12/15/20204,700,000 shares $18.99 million +49.2%5.6%3.1 $4.04 11/30/20203,150,000 shares $19.78 million +38.2%3.8%2.3 $6.28 11/15/20202,280,000 shares $12.22 million +7.6%2.7%2.3 $5.36 10/30/20202,120,000 shares $9.75 million +12.8%2.6%2.5 $4.60 10/15/20201,880,000 shares $11.05 million -25.7%2.3%2.1 $5.88 9/30/20202,530,000 shares $15.18 million +5.0%3.1%2.6 $6.00 9/15/20202,410,000 shares $14.24 million +24.9%2.9%2.5 $5.91 8/31/20201,930,000 shares $10.81 million -5.9%2.3%2 $5.60 8/14/20202,050,000 shares $10.50 million -5.5%2.5%2.5 $5.12 7/31/20202,170,000 shares $10.98 million +22.6%2.7%2.5 $5.06 7/15/20201,770,000 shares $10.05 million +9.9%2.2%2 $5.68 6/30/20201,610,000 shares $10.16 million -13.4%2.3%2.1 $6.31 6/15/20201,860,000 shares $12.74 million +2.2%2.6%2.4 $6.85 5/29/20201,820,000 shares $13.43 million -8.1%2.6%2.1 $7.38 5/15/20201,980,000 shares $15.58 million +99.7%2.8%2.1 $7.87 4/30/2020991,600 shares $6.85 million +59.6%1.4%1 $6.91 APTO Short Interest - Frequently Asked Questions What is Aptose Biosciences' current short interest? Short interest is the volume of Aptose Biosciences shares that have been sold short but have not yet been closed out or covered. As of March 15th, investors have sold 53,200 shares of APTO short. 3.30% of Aptose Biosciences' shares are currently sold short. Learn More on Aptose Biosciences' current short interest. Which institutional investors are shorting Aptose Biosciences? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Aptose Biosciences: Concourse Financial Group Securities Inc.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Aptose Biosciences? 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. 3.30% of Aptose Biosciences' floating shares are currently sold short. Is Aptose Biosciences' short interest increasing or decreasing? Aptose Biosciences saw a decline in short interest during the month of March. As of March 15th, there was short interest totaling 53,200 shares, a decline of 56.6% from the previous total of 122,600 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 Aptose Biosciences' float size? Aptose Biosciences currently has issued a total of 2,141,000 shares. Some of Aptose Biosciences' 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. Aptose Biosciences currently has a public float of 1,610,000 shares. How does Aptose Biosciences' short interest compare to its competitors? 3.30% of Aptose Biosciences' shares are currently sold short. Here is how the short interest of companies in the industry of "biological products, except diagnostic" compare to Aptose Biosciences: IN8bio, Inc. (1.56%), SAB Biotherapeutics, Inc. (1.24%), Curis, Inc. (1.74%), Athira Pharma, Inc. (2.62%), BioCardia, Inc. (1.43%), Turnstone Biologics Corp. (2.52%), PharmaCyte Biotech, Inc. (0.33%), Omega Therapeutics, Inc. (26.99%), Brainstorm Cell Therapeutics Inc. (2.71%), Avalon GloboCare Corp. (3.89%), 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 ($26.28 billion), iShares 20+ Year Treasury Bond ETF ($9.53 billion), Strategy Incorporated ($8.50 billion), Apollo Global Management, Inc. ($4.86 billion), Super Micro Computer, Inc. ($4.85 billion), Charter Communications, Inc. ($4.28 billion), Capital One Financial Co. ($4.08 billion), AppLovin Co. ($3.82 billion), Canadian Natural Resources Limited ($3.78 billion), and Schlumberger Limited ($2.87 billion). View all of the most shorted stocks. What does it mean to sell short Aptose Biosciences stock? Short selling APTO is an investing strategy that aims to generate trading profit from Aptose Biosciences as its price is falling. 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 Aptose Biosciences? A short squeeze for Aptose Biosciences 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 APTO, which in turn drives the price of the stock up even further. How often is Aptose Biosciences' 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 APTO, twice per month. The most recent reporting period available is March, 15 2025. More Short Interest Resources from MarketBeat Related Companies IN8bio Short Interest Data SAB Biotherapeutics Short Interest Data Curis Short Interest Data Athira Pharma Short Interest Data BioCardia Short Interest Data Turnstone Biologics Short Interest Data PharmaCyte Biotech Short Interest Data Omega Therapeutics Short Interest Data Brainstorm Cell Therapeutics Short Interest Data Avalon GloboCare 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:APTO) was last updated on 4/22/2025 by MarketBeat.com Staff From Our PartnersCollect $7k per month from Tesla’s SECRET dividendTesla doesn't pay a traditional dividend.... But I just discovered a secret backdoor to collect a secret 69...Investors Alley | SponsoredWarning: “DOGE Collapse” imminentElon Strikes Back You may already sense that the tide is turning against Elon Musk and DOGE. 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