Siga Technologies (SIGA) Short Interest Ratio & Short Volume $8.86 -0.44 (-4.75%) As of 12:26 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisChartCompetitorsDividendEarningsFDA EventsFinancialsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Siga Technologies Short Interest DataSiga Technologies (SIGA) has a short interest of 2.76 million shares, representing 6.83% of the float (the number of shares available for trading by the public). This marks a -4.83% decrease in short interest from the previous month. The short interest ratio (days to cover) is 6.3, indicating that it would take 6.3 days of the average trading volume of 470,576 shares to cover all short positions.Current Short Interest2,760,000 sharesPrevious Short Interest2,900,000 sharesChange Vs. Previous Month-4.83%Dollar Volume Sold Short$18.49 millionShort Interest Ratio6.3 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares71,610,000 sharesFloat Size40,410,000 sharesShort Percent of Float6.83%Today's Trading Volume242,769 sharesAverage Trading Volume470,576 sharesToday's Volume Vs. Average52% Short Selling Siga Technologies? Sign up to receive the latest short interest report for Siga Technologies and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartSIGA Short Interest Over TimeSIGA Days to Cover Over TimeSIGA Percentage of Float Shorted Over Time Siga Technologies Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/15/20252,760,000 shares $18.49 million -4.8%6.8%6.3 $6.70 6/30/20252,900,000 shares $18.91 million -5.2%7.2%5.8 $6.52 6/15/20253,060,000 shares $19.46 million +0.3%7.6%6.2 $6.36 5/31/20253,050,000 shares $18.33 million -16.0%7.5%5.9 $6.01 5/15/20253,630,000 shares $21.49 million -12.5%9.0%6.8 $5.92 4/30/20254,150,000 shares $22.91 million No Change10.2%7.8 $5.52 4/15/20254,150,000 shares $25.07 million +3.8%10.2%8.4 $6.04 3/31/20254,000,000 shares $21.92 million +4.7%9.9%8.9 $5.48 3/15/20253,820,000 shares $21.32 million -6.8%9.4%8.7 $5.58 2/28/20254,100,000 shares $22.51 million +28.5%10.1%9.2 $5.49 Get the Latest News and Ratings for SIGA and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Siga Technologies and its competitors with MarketBeat's FREE daily newsletter. 2/15/20253,190,000 shares $19.59 million -9.4%7.9%7 $6.14 1/31/20253,520,000 shares $21.05 million +3.5%8.7%7.7 $5.98 1/15/20253,400,000 shares $21.59 million -2.6%8.4%7.1 $6.35 12/31/20243,490,000 shares $20.97 million -0.9%8.6%7.1 $6.01 12/15/20243,520,000 shares $21.75 million -4.9%8.7%6.7 $6.18 11/30/20243,700,000 shares $26.94 million +4.8%9.1%6.7 $7.28 11/15/20243,530,000 shares $20.97 million -22.8%8.7%6 $5.94 10/31/20244,570,000 shares $33.00 million -7.3%11.3%3.4 $7.22 10/15/20244,930,000 shares $33.23 million -2.4%12.2%3.5 $6.74 9/30/20245,050,000 shares $34.09 million -8.5%12.5%3.6 $6.75 9/15/20245,520,000 shares $43.61 million +6.6%13.6%3.9 $7.90 8/31/20245,180,000 shares $46.78 million -15.6%12.8%3.7 $9.03 8/15/20246,140,000 shares $59.07 million +11.2%15.2%4.6 $9.62 7/31/20245,520,000 shares $55.09 million -4.3%13.7%8.3 $9.98 7/15/20245,770,000 shares $52.68 million +3.4%14.3%8.4 $9.13 6/30/20245,580,000 shares $42.35 million +6.3%13.9%7.7 $7.59 6/15/20245,250,000 shares $35.02 million +2.5%13.0%6.4 $6.67 5/31/20245,120,000 shares $38.30 million +2.4%12.7%5 $7.48 5/15/20245,000,000 shares $39 million -8.3%12.4%5 $7.80 4/30/20245,450,000 shares $47.85 million +10.1%13.5%5.9 $8.78 4/15/20244,950,000 shares $43.96 million -3.7%12.3%6.3 $8.88 3/31/20245,140,000 shares $44.00 million -6.9%12.8%7.2 $8.56 3/15/20245,520,000 shares $40.46 million +8.0%13.7%9.5 $7.33 2/29/20245,110,000 shares $26.62 million +1.2%12.7%14.3 $5.21 2/15/20245,050,000 shares $26.01 million -4.5%12.5%13.7 $5.15 1/31/20245,290,000 shares $25.82 million +3.7%13.1%13.2 $4.88 1/15/20245,100,000 shares $27.44 million -2.3%12.6%13.2 $5.38 12/31/20235,220,000 shares $29.23 million -0.4%12.9%13.2 $5.60 12/15/20235,240,000 shares $29.13 million -12.7%13.0%12.3 $5.56 11/30/20236,000,000 shares $32.58 million -1.5%14.8%13.4 $5.43He Called Nvidia at $1.10. Now, He Says THIS Stock Will… (Ad)The original Magnificent Seven returned 16,894%—turning $7K into $1.18 million. Now, the man who called Nvidia at $1.10 reveals AI’s Next Magnificent Seven… including one stock he says could become America’s next trillion-dollar giant.See his full breakdown of the seven stocks to own now 11/15/20236,090,000 shares $31.12 million -2.3%15.1%13.9 $5.11 10/31/20236,230,000 shares $31.77 million -0.3%15.4%12.6 $5.10 10/15/20236,250,000 shares $34 million +1.6%15.5%7.2 $5.44 9/30/20236,150,000 shares $32.29 million -0.3%15.2%7.1 $5.25 9/15/20236,170,000 shares $28.20 million +13.8%15.3%7.1 $4.57 8/31/20235,420,000 shares $24.88 million -0.9%13.4%6.1 $4.59 8/15/20235,470,000 shares $27.73 million +17.9%13.5%6 $5.07 7/31/20234,640,000 shares $26.63 million -4.9%11.4%4.7 $5.74 7/15/20234,880,000 shares $24.06 million -1.6%12.0%7.6 $4.93 6/30/20234,960,000 shares $25.05 million +0.6%12.2%7.4 $5.05 6/15/20234,930,000 shares $28.50 million -4.1%12.1%7.1 $5.78 5/31/20235,140,000 shares $28.84 million +0.8%12.6%6.6 $5.61 5/15/20235,100,000 shares $29.58 million +39.7%12.5%6.2 $5.80 4/30/20233,650,000 shares $21.28 million +7.4%8.9%4.7 $5.83 4/15/20233,400,000 shares $20.23 million -1.2%8.2%4.5 $5.95 3/31/20233,440,000 shares $19.78 million +9.9%8.2%4.4 $5.75 3/15/20233,130,000 shares $17.59 million No Change7.5%3.9 $5.62 2/28/20233,130,000 shares $21.44 million +12.6%7.5%4.1 $6.85 2/15/20232,780,000 shares $19.18 million No Change6.6%3.7 $6.90 1/31/20232,780,000 shares $20.38 million -25.3%6.6%3.2 $7.33 1/15/20233,720,000 shares $31.32 million -5.3%8.8%3.9 $8.42 12/30/20223,930,000 shares $28.92 million -13.4%9.6%3.8 $7.36 12/15/20224,540,000 shares $34.50 million +0.7%11.1%3.7 $7.60 11/30/20224,510,000 shares $41.40 million -7.4%11.0%3 $9.18 11/15/20224,870,000 shares $45.97 million -0.6%11.9%2.4 $9.44 10/31/20224,900,000 shares $45.03 million +0.8%12.0%1.6 $9.19 10/15/20224,860,000 shares $44.81 million +3.6%11.9%0.7 $9.22 9/30/20224,690,000 shares $48.31 million -14.3%11.5%0.5 $10.30 9/15/20225,470,000 shares $69.63 million -3.5%13.4%0.6 $12.73 8/31/20225,670,000 shares $85.50 million -14.6%14.0%0.5 $15.08 8/15/20226,640,000 shares $173.64 million +17.9%16.4%0.4 $26.15 7/31/20225,630,000 shares $96.78 million +58.6%14.0%0.3 $17.19 7/15/20223,550,000 shares $53.11 million -12.8%8.8%0.3 $14.96 6/30/20224,070,000 shares $47.13 million -4.5%10.1%0.4 $11.58 6/15/20224,260,000 shares $44.05 million +50.0%10.6%0.5 $10.34 5/31/20222,840,000 shares $31.07 million +90.6%7.0%0.4 $10.94 5/15/20221,490,000 shares $11.12 million +16.4%3.7%0.4 $7.46 4/30/20221,280,000 shares $8.79 million +5.8%3.1%8.4 $6.87 4/15/20221,210,000 shares $8.32 million -3.2%3.0%7.8 $6.88 3/31/20221,250,000 shares $8.86 million No Change3.0%7.8 $7.09 3/15/20221,250,000 shares $8.89 million +2.5%3.0%7.9 $7.11 2/28/20221,220,000 shares $7.32 million +0.8%2.9%5.9 $6.00 2/15/20221,210,000 shares $7.60 million -2.4%2.9%5.1 $6.28 1/31/20221,240,000 shares $8.07 million +1.6%2.9%3.9 $6.51 1/15/20221,220,000 shares $8.53 million -3.9%2.9%3.8 $6.99 12/31/20211,270,000 shares $9.55 million -13.0%3.0%4.1 $7.52 12/15/20211,460,000 shares $10.96 million +14.1%3.5%4.4 $7.51 11/30/20211,280,000 shares $10.44 million -2.3%3.0%3.4 $8.16 11/15/20211,310,000 shares $9.98 million No Change3.1%3.9 $7.62 10/29/20211,310,000 shares $9.45 million +1.6%3.1%5.2 $7.21He Called Nvidia at $1.10. Now, He Says THIS Stock Will… (Ad)The original Magnificent Seven returned 16,894%—turning $7K into $1.18 million. Now, the man who called Nvidia at $1.10 reveals AI’s Next Magnificent Seven… including one stock he says could become America’s next trillion-dollar giant.See his full breakdown of the seven stocks to own now 10/15/20211,290,000 shares $9.17 million -19.4%3.0%5.1 $7.11 9/30/20211,600,000 shares $11.82 million -4.8%3.8%5 $7.39 9/15/20211,680,000 shares $11.21 million -6.2%3.9%5.1 $6.67 8/31/20211,790,000 shares $11.69 million +2.9%4.2%5.6 $6.53 8/13/20211,740,000 shares $11.00 million +3.0%4.0%5.8 $6.32 7/30/20211,690,000 shares $10.77 million +9.0%3.9%5.6 $6.37 7/15/20211,550,000 shares $8.96 million +15.7%3.6%5.2 $5.78 6/30/20211,340,000 shares $8.42 million -20.7%3.1%5 $6.28 6/15/20211,690,000 shares $11.10 million -2.9%3.9%6.4 $6.57 5/28/20211,740,000 shares $12.27 million -0.6%4.0%6.4 $7.05 5/14/20211,750,000 shares $11.88 million +4.8%4.0%6.5 $6.79 4/30/20211,670,000 shares $11.76 million -4.6%3.8%5.9 $7.04 4/15/20211,750,000 shares $12.23 million -9.8%3.9%6 $6.99 3/31/20211,940,000 shares $12.65 million +4.9%4.3%7.1 $6.52 3/15/20211,850,000 shares $12.86 million -7.0%4.1%7.4 $6.95 2/26/20211,990,000 shares $12.70 million +1.0%4.5%8.6 $6.38 2/12/20211,970,000 shares $12.77 million +3.7%4.4%8.8 $6.48 1/29/20211,900,000 shares $12.39 million -2.6%4.2%8.3 $6.52 1/15/20211,950,000 shares $14.43 million -7.6%4.3%9.1 $7.40 12/31/20202,110,000 shares $15.36 million -2.8%4.7%10 $7.28 12/15/20202,170,000 shares $15.30 million -8.4%4.8%10.1 $7.05 11/30/20202,370,000 shares $16.78 million -5.2%5.2%9.5 $7.08 11/15/20202,500,000 shares $19.03 million -2.7%5.5%9.8 $7.61 10/30/20202,570,000 shares $16.81 million +6.2%5.7%9.8 $6.54 10/15/20202,420,000 shares $16.34 million -2.8%5.3%8.5 $6.75 SIGA Short Interest - Frequently Asked Questions What is Siga Technologies' current short interest? Short interest is the volume of Siga Technologies shares that have been sold short but have not yet been closed out or covered. As of July 15th, traders have sold 2,760,000 shares of SIGA short. 6.83% of Siga Technologies' shares are currently sold short. Learn More on Siga Technologies' current short interest. What is a good short interest ratio for Siga Technologies? 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. SIGA shares currently have a short interest ratio of 6.0. Learn More on Siga Technologies's short interest ratio. What is a good short interest percentage for Siga Technologies? 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. 6.83% of Siga Technologies' floating shares are currently sold short. Is Siga Technologies' short interest increasing or decreasing? Siga Technologies saw a drop in short interest during the month of July. As of July 15th, there was short interest totaling 2,760,000 shares, a drop of 4.8% from the previous total of 2,900,000 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. What is Siga Technologies' float size? Siga Technologies currently has issued a total of 71,610,000 shares. Some of Siga Technologies' 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. Siga Technologies currently has a public float of 40,410,000 shares. How does Siga Technologies' short interest compare to its competitors? 6.83% of Siga Technologies' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Siga Technologies: Vericel Corporation (10.60%), Apogee Therapeutics Inc. (24.62%), Tarsus Pharmaceuticals, Inc. (19.45%), Arcutis Biotherapeutics, Inc. (14.40%), ARS Pharmaceuticals, Inc. (26.75%), Immunocore Holdings PLC Sponsored ADR (17.36%), Adaptive Biotechnologies Corporation (6.36%), Sarepta Therapeutics, Inc. (15.21%), Edgewise Therapeutics, Inc. (14.36%), Biohaven Ltd. (13.20%), 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 Siga Technologies stock? Short selling SIGA is an investing strategy that aims to generate trading profit from Siga Technologies as its price is falling. SIGA shares are trading down $0.44 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 Siga Technologies? A short squeeze for Siga Technologies 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 SIGA, which in turn drives the price of the stock up even further. How often is Siga Technologies' 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 SIGA, twice per month. The most recent reporting period available is July, 15 2025. More Short Interest Resources from MarketBeat Related Companies VCEL Short Squeeze APGE Short Squeeze TARS Short Squeeze ARQT Short Squeeze SPRY Short Squeeze IMCR Short Squeeze ADPT Short Squeeze SRPT Short Squeeze EWTX Short Squeeze BHVN Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:SIGA) was last updated on 8/13/2025 by MarketBeat.com Staff From Our PartnersTrump’s national nightmare is herePorter Stansberry and Jeff Brown say a new U.S. national emergency is already underway — and it could trigger ...Porter & Company | SponsoredThe Robotics Revolution has arrived … and one $7 stock could take off as a result.Something big is brewing in Washington. 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