Atossa Therapeutics (ATOS) Short Interest Ratio & Short Volume $0.87 -0.07 (-7.58%) Closing price 04:00 PM EasternExtended Trading$0.87 +0.00 (+0.26%) As of 06:03 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Atossa Therapeutics Short Interest DataAtossa Therapeutics (ATOS) has a short interest of 7.13 million shares. This marks a -6.55% decrease in short interest from the previous month. The short interest ratio (days to cover) is 11.6, indicating that it would take 11.6 days of the average trading volume of 791,630 shares to cover all short positions.Current Short Interest7,130,000 sharesPrevious Short Interest7,630,000 sharesChange Vs. Previous Month-6.55%Dollar Volume Sold Short$6.40 millionShort Interest Ratio11.6 Days to CoverLast Record DateApril 30, 2025Outstanding Shares129,170,000 sharesPercentage of Shares Shorted5.52%Today's Trading Volume946,179 sharesAverage Trading Volume791,630 sharesToday's Volume Vs. Average120% Short Selling Atossa Therapeutics? Sign up to receive the latest short interest report for Atossa Therapeutics and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartATOS Short Interest Over TimeATOS Days to Cover Over TimeATOS Percentage of Float Shorted Over Time Atossa 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 4/30/20257,130,000 shares $6.40 million -6.6%N/A11.6 $0.90 4/15/20257,630,000 shares $4.76 million -5.8%6.6%12 $0.62 3/31/20258,100,000 shares $5.45 million -5.6%7.0%12 $0.67 3/15/20258,580,000 shares $6.18 million -3.2%7.4%12.3 $0.72 2/28/20258,860,000 shares $6.78 million -1.5%7.6%11.5 $0.77 2/15/20258,990,000 shares $7.46 million -2.8%7.7%10.9 $0.83 1/31/20259,250,000 shares $7.79 million +5.8%N/A10.6 $0.84 1/15/20258,740,000 shares $7.60 million +2.0%N/A10.6 $0.87 12/31/20248,570,000 shares $8.09 million +4.5%N/A11.3 $0.94 12/15/20248,200,000 shares $9.18 million -29.3%N/A11.6 $1.12 Get the Latest News and Ratings for ATOS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Atossa Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 11/30/202411,600,000 shares $15.08 million -6.8%N/A18.5 $1.30 11/15/202412,450,000 shares $15.94 million -2.5%N/A20.5 $1.28 10/31/202412,770,000 shares $17.62 million -2.2%N/A24.4 $1.38 10/15/202413,050,000 shares $18.66 million +0.9%N/A24.1 $1.43 9/30/202412,930,000 shares $19.65 million -1.9%N/A20 $1.52 9/15/202413,180,000 shares $20.03 million +2.2%N/A13.2 $1.52 8/31/202412,900,000 shares $17.67 million +0.3%N/A12.8 $1.37 8/15/202412,860,000 shares $16.46 million +1.1%N/A12 $1.28 7/31/202412,720,000 shares $17.17 million +3.1%N/A10.4 $1.35 7/15/202412,340,000 shares $17.28 million +20.0%N/A9.3 $1.40 6/30/202410,280,000 shares $12.23 million -5.6%N/A6.8 $1.19 6/15/202410,890,000 shares $13.07 million -2.9%N/A6.4 $1.20 5/31/202411,220,000 shares $14.59 million -2.3%N/A5.9 $1.30 5/15/202411,480,000 shares $18.48 million +0.4%N/A6 $1.61 4/30/202411,440,000 shares $17.27 million -7.4%N/A6.4 $1.51 4/15/202412,350,000 shares $21.12 million +17.0%N/A7.6 $1.71 3/31/202410,560,000 shares $19.01 million +24.5%N/A7.7 $1.80 3/15/20248,480,000 shares $10.94 million +18.6%N/A9 $1.29 2/29/20247,150,000 shares $6.99 million +1.6%N/A13.6 $0.98 2/15/20247,040,000 shares $7.11 million +2.9%N/A16.8 $1.01 1/31/20246,840,000 shares $5.84 million -2.2%N/A17.4 $0.85 1/15/20246,990,000 shares $6.36 million +9.9%N/A18.4 $0.91 12/31/20236,360,000 shares $5.60 million +1.0%N/A16.7 $0.88 12/15/20236,300,000 shares $4.67 million +1.0%N/A19.3 $0.74 11/30/20236,240,000 shares $4.64 million -2.0%N/A19.3 $0.74 11/15/20236,370,000 shares $4.17 million -4.2%N/A17.4 $0.65 10/31/20236,650,000 shares $4.46 million -5.7%N/A16.4 $0.67 10/15/20237,050,000 shares $4.65 million -2.8%N/A16.3 $0.66 9/30/20237,250,000 shares $5.34 million -8.8%N/A13.1 $0.74 9/15/20237,950,000 shares $6.28 million -3.1%N/A9.7 $0.79Trump’s treachery (Ad)Trump’s Final Reset Inside the shocking plot to re-engineer America’s financial system…and why you need to move your money now.Millions of Americans are about to be wiped out, while others could make a fortune… click here to ma 8/31/20238,200,000 shares $6.48 million -1.8%N/A9.6 $0.79 8/15/20238,350,000 shares $7.36 million -1.7%N/A8.6 $0.88 7/31/20238,490,000 shares $9.34 million -2.6%N/A9.1 $1.10 7/15/20238,720,000 shares $10.81 million +12.5%N/A9.5 $1.24 6/30/20237,750,000 shares $9.77 million +6.9%N/A9.8 $1.26 6/15/20237,250,000 shares $6.52 million -3.6%N/A14.4 $0.90 5/31/20237,520,000 shares $6.99 million -3.2%N/A16.1 $0.93 5/15/20237,770,000 shares $5.50 million -3.7%N/A22.4 $0.71 4/30/20238,070,000 shares $5.16 million -3.1%N/A24.9 $0.64 4/15/20238,330,000 shares $6.12 million -1.3%N/A24.4 $0.74 3/31/20238,440,000 shares $6.12 million -1.9%N/A19.4 $0.72 3/15/20238,600,000 shares $5.59 million +0.6%N/A17.1 $0.65 2/28/20238,550,000 shares $6.33 million -2.2%N/A15.5 $0.74 2/15/20238,740,000 shares $6.69 million -0.6%N/A15.9 $0.77 1/31/20238,790,000 shares $7.04 million -3.2%N/A15.6 $0.80 1/15/20239,080,000 shares $7.75 million -1.7%N/A15.5 $0.85 12/30/20229,240,000 shares $4.88 million -3.7%N/A18.1 $0.53 12/15/20229,590,000 shares $5.61 million -4.3%N/A21.2 $0.59 11/30/202210,020,000 shares $7.52 million -4.1%N/A22.4 $0.75 11/15/202210,450,000 shares $8.58 million -0.2%N/A23.7 $0.82 10/31/202210,470,000 shares $10.32 million -1.2%N/A19.5 $0.99 10/15/202210,600,000 shares $8.59 million -5.8%N/A19.2 $0.81 9/30/202211,250,000 shares $9.37 million -1.6%N/A18.9 $0.83 9/15/202211,430,000 shares $10.53 million -2.8%N/A11.8 $0.92 8/31/202211,760,000 shares $10.83 million -1.3%N/A10.1 $0.92 8/15/202211,910,000 shares $13.58 million -3.7%N/A9 $1.14 7/31/202212,370,000 shares $11.64 million -1.9%N/A8.9 $0.94 7/15/202212,610,000 shares $12.99 million -3.7%N/A7.9 $1.03 6/30/202213,100,000 shares $14.28 million -18.3%N/A7.5 $1.09 6/15/202216,040,000 shares $16.68 million -1.3%N/A8.7 $1.04 5/31/202216,250,000 shares $15.80 million -5.2%N/A9.4 $0.97 5/15/202217,140,000 shares $16.90 million -11.4%N/A9.4 $0.99 4/30/202219,350,000 shares $19.54 million +8.9%N/A9.6 $1.01 4/15/202217,770,000 shares $19.72 million +1.7%N/A8.7 $1.11 3/31/202217,480,000 shares $21.85 million -2.7%N/A8.4 $1.25 3/15/202217,960,000 shares $21.19 million +7.4%N/A7.5 $1.18 2/28/202216,720,000 shares $20.40 million -1.1%N/A6.6 $1.22 2/15/202216,910,000 shares $23.34 million +2.3%N/A6.4 $1.38 1/31/202216,530,000 shares $22.65 million -3.7%14.1%5.7 $1.37 1/15/202217,160,000 shares $25.05 million -0.8%N/A5.7 $1.46 12/31/202117,290,000 shares $27.66 million -3.8%N/A5.3 $1.60 12/15/202117,980,000 shares $35.42 million No ChangeN/A5.3 $1.97 11/30/202117,980,000 shares $40.81 million -3.1%N/A4.6 $2.27 11/15/202118,550,000 shares $47.67 million -3.3%N/A4 $2.57 10/29/202119,190,000 shares $49.32 million -8.5%N/A3.9 $2.57 10/15/202120,970,000 shares $59.97 million -5.9%N/A3.3 $2.86 9/30/202122,280,000 shares $72.63 million -5.9%N/A2.4 $3.26 9/15/202123,670,000 shares $78.82 million -3.8%N/A1.7 $3.33 8/31/202124,600,000 shares $93.48 million +3.9%N/A1.5 $3.80 8/13/202123,670,000 shares $76.22 million -24.3%N/A1.2 $3.22Washington Is Broke—and Eyeing Your Savings Next (Ad)Washington is running out of money…And guess where they'll look next? 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The Department of Justice just admitted that cash isn't legally YOUR property.Get your free guide now by clicking here >> 7/30/202131,280,000 shares $93.53 million +21.6%N/A1.5 $2.99 7/15/202125,730,000 shares $144.60 million +25.3%21.3%1.2 $5.62 6/30/202120,530,000 shares $129.75 million +24.3%17.0%1.1 $6.32 6/15/202116,520,000 shares $76.32 million +20.0%13.7%1.1 $4.62 5/28/202113,770,000 shares $44.34 million +2.9%11.4%1 $3.22 5/14/202113,380,000 shares $31.58 million +0.7%N/A1.2 $2.36 4/30/202113,290,000 shares $30.83 million +26.7%N/A1.1 $2.32 4/15/202110,490,000 shares $19.51 million +4.5%N/A0.5 $1.86 3/31/202110,040,000 shares $20.58 million +52.4%N/A0.4 $2.05 3/15/20216,590,000 shares $19.18 million -6.7%N/A0.3 $2.91 2/26/20217,060,000 shares $20.54 million +22.6%N/A0.3 $2.91 2/12/20215,760,000 shares $18.37 million -37.4%N/A0.3 $3.19 1/29/20219,200,000 shares $19.14 million +9.0%N/A0.5 $2.08 1/15/20218,440,000 shares $10.55 million +1,172.4%N/A0.7 $1.25 12/31/2020663,300 shares $583,637.67 -76.3%N/A0.1 $0.88 12/15/20202,800,000 shares $2.53 million +529.6%N/A1.2 $0.90 11/30/2020444,700 shares $773,778.00 +53.1%N/A0.6 $1.74 11/15/2020290,400 shares $455,928.00 +45.1%N/A1.2 $1.57 10/30/2020200,100 shares $310,155.00 +15.9%N/A0.7 $1.55 10/15/2020172,700 shares $376,486.00 -15.2%N/A0.4 $2.18 9/30/2020203,600 shares $492,712.00 +53.7%N/A0.3 $2.42 9/15/2020132,500 shares $308,725.00 -35.0%N/A0.2 $2.33 8/31/2020203,700 shares $519,435.00 -20.3%N/A0.3 $2.55 8/14/2020255,500 shares $947,905.00 +43.4%N/A0.3 $3.71 7/31/2020178,200 shares $673,596.00 +5.4%N/A0.2 $3.78 7/15/2020169,100 shares $669,636.00 -12.8%N/A0.2 $3.96 6/30/2020193,800 shares $736,440.00 -17.6%N/A0.2 $3.80 6/15/2020235,300 shares $724,724.00 -23.1%N/A0.2 $3.08 5/29/2020306,000 shares $728,280.00 +46.9%N/A0.4 $2.38 ATOS Short Interest - Frequently Asked Questions What is Atossa Therapeutics' current short interest? Short interest is the volume of Atossa Therapeutics shares that have been sold short but have not yet been closed out or covered. As of April 30th, investors have sold 7,130,000 shares of ATOS short. Learn More on Atossa Therapeutics' current short interest. What is a good short interest ratio for Atossa 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. ATOS shares currently have a short interest ratio of 12.0. Learn More on Atossa Therapeutics's short interest ratio. Which institutional investors are shorting Atossa Therapeutics? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Atossa Therapeutics: Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Atossa Therapeutics' short interest increasing or decreasing? Atossa Therapeutics saw a decline in short interest during the month of April. As of April 30th, there was short interest totaling 7,130,000 shares, a decline of 6.6% from the previous total of 7,630,000 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 Atossa Therapeutics' short interest compare to its competitors? Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Atossa Therapeutics: SIGA Technologies, Inc. (10.24%), Zevra Therapeutics, Inc. (10.35%), Sage Therapeutics, Inc. (8.48%), Amylyx Pharmaceuticals, Inc. (6.30%), Prothena Co. plc (13.84%), PureTech Health plc (0.04%), ABIVAX Société Anonyme (2.48%), Tourmaline Bio, Inc. (19.89%), Precigen, Inc. (16.99%), REGENXBIO Inc. (10.31%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks. What does it mean to sell short Atossa Therapeutics stock? Short selling ATOS is an investing strategy that aims to generate trading profit from Atossa Therapeutics as its price is falling. ATOS shares are trading down $0.07 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 Atossa Therapeutics? A short squeeze for Atossa 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 ATOS, which in turn drives the price of the stock up even further. How often is Atossa 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 ATOS, twice per month. The most recent reporting period available is April, 30 2025. More Short Interest Resources from MarketBeat Related Companies SIGA Technologies Short Interest Zevra Therapeutics Short Interest Sage Therapeutics Short Interest Amylyx Pharmaceuticals Short Interest Prothena Short Interest PureTech Health Short Interest ABIVAX Société Anonyme Short Interest Tourmaline Bio Short Interest Precigen Short Interest REGENXBIO 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:ATOS) was last updated on 5/21/2025 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 | SponsoredGold Hits New Highs as Global Markets SpiralWhen Trump took office in 2017, gold was just $1,100 an ounce. 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