SELLAS Life Sciences Group (SLS) Short Interest Ratio & Short Volume $10.15 -0.23 (-2.22%) Closing price 10/29/2026 04:00 PM EasternExtended Trading$9.98 -0.17 (-1.67%) As of 04:26 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 Massive. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsInsider TradesNews and TrendsOptions ChainOwnershipSEC FilingsShort Interest SELLAS Life Sciences Group Short Interest OverviewAs of October 15, 2026, SELLAS Life Sciences Group (SLS) had a short interest of 53.76 million shares sold short, representing 26.97% of the public float. This marks a 2.48% decrease in short interest since the prior report. The short interest ratio (days to cover) is 12.0, meaning it would take 12.0 days of the average trading volume of 6.51 million shares to cover all short positions.Current Short Interest53,759,252 sharesPrevious Short Interest55,128,974 sharesChange Vs. Previous Report-2.48%Dollar Volume Sold Short$609.63 millionShort Interest Ratio12.0 Days to CoverLast Record DateOctober 15, 2026Outstanding Shares201,950,000 sharesShort Percent of Float26.97%Today's Trading Volume8,323,696 sharesAverage Trading Volume6,514,191 sharesToday's Volume Vs. Average128% Short Selling SELLAS Life Sciences Group? Sign up to receive the latest short interest report for SELLAS Life Sciences Group and its competitors with MarketBeat's FREE newsletter. Email Address Get Report View SMS TermsSMS is currently available in Australia, Belgium, Canada, France, Germany, Ireland, Italy, New Zealand, the Netherlands, Singapore, South Africa, Spain, Switzerland, the United Kingdom, and the United States. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartSLS Short Interest Over TimeSLS Days to Cover Over TimeSLS Percentage of Float Shorted Over Time SELLAS Life Sciences Group Tesla Short Interest History & Recent Changes ExportReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 10/15/202653,759,252 shares $609.63 million -2.5%27.0%11.95 $11.34 9/30/202655,128,974 shares $678.64 million -6.7%27.7%9.45 $12.31 9/15/202659,068,630 shares $666.88 million +2.0%29.6%8.6 $11.29 8/31/202657,926,912 shares $772.75 million +2.8%29.1%6.88 $13.34 8/14/202656,371,865 shares $720.43 million +2.5%28.3%10.44 $12.78 7/31/202654,975,815 shares $550.31 million -0.6%28.3%7.89 $10.01 7/15/202655,280,869 shares $707.04 million -12.7%28.5%5.93 $12.79 6/30/202663,307,462 shares $934.42 million -0.1%32.6%4.75 $14.76 6/15/202663,360,925 shares $489.78 million +3.9%32.6%9.25 $7.73 5/29/202661,000,107 shares $567.91 million +6.9%31.4%4.42 $9.31 Get the Latest News and Ratings for SLS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for SELLAS Life Sciences Group and its competitors with MarketBeat's FREE daily newsletter. 5/15/202657,070,692 shares $404.06 million -0.1%31.1%7.14 $7.08 4/30/202657,147,188 shares $282.88 million +0.9%31.3%11.68 $4.95 4/15/202656,642,215 shares $278.11 million +5.8%29.2%13.63 $4.91 3/31/202653,525,042 shares $226.41 million +16.9%27.6%5.96 $4.23 3/13/202645,790,317 shares $245.89 million -6.8%32.5%6.25 $5.37 2/27/202649,129,452 shares $242.21 million +6.7%34.9%7.79 $4.93 2/13/202646,050,545 shares $165.32 million +11.4%23.7%10.01 $3.59 1/30/202641,330,037 shares $155.81 million -1.7%29.4%6.26 $3.77 1/15/202642,044,430 shares $161.45 million -14.9%29.9%2.59 $3.84 12/31/202549,429,420 shares $186.35 million +22.2%35.1%4.31 $3.77 12/15/202540,466,622 shares $82.55 million +21.7%28.8%7.07 $2.04 11/28/202533,260,681 shares $53.72 million +4.6%23.6%10.24 $1.62 11/14/202531,792,641 shares $45.46 million +9.8%25.8%8.9 $1.43 10/31/202528,964,581 shares $52.72 million +15.4%23.5%4.73 $1.82 10/15/202525,090,000 shares $54.70 million +8.9%20.3%9 $2.18 9/30/202523,050,000 shares $37.11 million +10.3%N/A10.3 $1.61 9/15/202520,890,000 shares $35.10 million -28.8%N/A8.1 $1.68 8/31/202529,340,000 shares $56.33 million +0.7%28.3%11.4 $1.92 8/15/202529,150,000 shares $47.51 million +10.4%N/A10.7 $1.63 7/31/202526,410,000 shares $41.99 million -4.8%26.8%9.1 $1.59 7/15/202527,740,000 shares $52.71 million +13.9%N/A9.1 $1.90 6/30/202524,360,000 shares $53.35 million +28.9%24.8%8.8 $2.19 6/15/202518,900,000 shares $31.37 million +54.7%19.2%8.6 $1.66 5/31/202512,220,000 shares $20.65 million +39.5%17.6%6.4 $1.69 5/15/20258,760,000 shares $14.02 million +13.6%12.6%5.1 $1.60 4/30/20257,710,000 shares $11.95 million -0.8%N/A5.4 $1.55 4/15/20257,770,000 shares $10.02 million -5.0%11.2%3.2 $1.29 3/31/20258,180,000 shares $8.83 million +4.2%11.8%3.3 $1.08 3/15/20257,850,000 shares $8.95 million +0.5%11.3%3.2 $1.14 2/28/20257,810,000 shares $9.22 million -9.7%11.2%2.9 $1.18Elon Musk about to bankrupt Amazon, Microsoft & Google? 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Brown compares the scale of this project to the SpaceX IPO, which minted thousands of millionaires overnight.Click here to see the full details on Musk's next big move 2/15/20258,650,000 shares $11.42 million -11.8%12.4%3.2 $1.32 1/31/20259,810,000 shares $15.89 million +9.0%N/A3.7 $1.62 1/15/20259,000,000 shares $8.73 million +12.9%N/A4.4 $0.97 12/31/20247,970,000 shares $8.29 million +6.8%N/A7 $1.04 12/15/20247,460,000 shares $6.51 million -17.6%N/A7.6 $0.87 11/30/20249,050,000 shares $10.23 million +3.2%N/A11.2 $1.13 11/15/20248,770,000 shares $11.58 million +1.9%N/A14.3 $1.32 10/31/20248,610,000 shares $10.16 million +41.6%N/A16.1 $1.18 10/15/20246,080,000 shares $7.30 million -25.7%N/A10.2 $1.20 9/30/20248,180,000 shares $10.23 million +0.3%N/A13 $1.25 9/15/20248,160,000 shares $10.77 million -0.7%N/A12.4 $1.32 8/31/20248,220,000 shares $10.60 million +6.5%N/A9.2 $1.29 8/15/20247,720,000 shares $9.80 million -27.5%N/A8.4 $1.27 7/31/202410,650,000 shares $12.35 million +9.6%N/A11 $1.16 7/15/20249,720,000 shares $10.59 million +9.7%N/A8.3 $1.09 6/30/20248,860,000 shares $10.54 million +17.4%N/A7.2 $1.19 6/15/20247,550,000 shares $11.33 million -1.3%N/A5.2 $1.50 5/31/20247,650,000 shares $10.79 million +5.5%N/A5.3 $1.41 5/15/20247,250,000 shares $10.66 million +3.7%N/A4.7 $1.47 4/30/20246,990,000 shares $8.67 million +23.3%N/A4.6 $1.24 4/15/20245,670,000 shares $7.54 million +7.6%N/A4 $1.33 3/31/20245,270,000 shares $5.32 million +1.7%N/A3.6 $1.01 3/15/20245,180,000 shares $5.70 million +14.9%N/A3.7 $1.10 2/29/20244,510,000 shares $4.56 million +15.9%N/A4.2 $1.01 2/15/20243,890,000 shares $2.74 million +24.7%N/A3.7 $0.70 1/31/20243,120,000 shares $2.00 million -19.6%N/A3.1 $0.64 1/15/20243,880,000 shares $2.07 million -18.0%N/A4.3 $0.53 12/31/20234,730,000 shares $5.01 million +1.5%N/A4.9 $1.06 12/15/20234,660,000 shares $5.36 million +1.1%N/A6.3 $1.15 11/30/20234,610,000 shares $4.79 million +0.7%N/A7.3 $1.04 11/15/20234,580,000 shares $4.44 million +50.2%N/A8.7 $0.97 10/31/20233,050,000 shares $2.96 million +49.5%N/A6.6 $0.97 10/15/20232,040,000 shares $2.65 million +87.2%N/A6.5 $1.30 9/30/20231,090,000 shares $1.79 million +6.9%N/A7.7 $1.64 9/15/20231,020,000 shares $1.64 million -9.7%N/A8.1 $1.61 8/31/20231,130,000 shares $1.66 million No ChangeN/A8.9 $1.47 8/15/20231,130,000 shares $1.68 million -4.2%N/A8.7 $1.49 7/31/20231,180,000 shares $1.94 million +2.6%N/A8.2 $1.64 7/15/20231,150,000 shares $1.97 million -0.9%N/A7.4 $1.71 6/30/20231,160,000 shares $1.82 million +3.6%N/A6.8 $1.57 6/15/20231,120,000 shares $1.86 million -5.9%N/A5.4 $1.66 5/31/20231,190,000 shares $2.04 million -4.8%N/A4.8 $1.72 5/15/20231,250,000 shares $2.05 million +4.2%N/A2.7 $1.64 4/30/20231,200,000 shares $1.69 million +1.7%N/A2.6 $1.41 4/15/20231,180,000 shares $1.89 million +7.3%N/A2.6 $1.60 3/31/20231,100,000 shares $1.57 million -9.8%N/A2.4 $1.43 3/15/20231,220,000 shares $1.68 million -5.4%N/A3 $1.38 2/28/20231,290,000 shares $2.18 million +7.5%N/A3.5 $1.69 2/15/20231,200,000 shares $3.79 million +2.6%N/A4.1 $3.16 1/31/20231,170,000 shares $3.88 million -2.5%N/A4.5 $3.32Trump’s $16 Trillion Chess Move (signed and highlighted) (Ad)A newly signed executive order could point to one of the largest resource deals in history, according to Matt McCall of Monument Traders Alliance. 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Lithium Americas rose 227% in under a month, Trilogy Metals climbed 407% in a single week, and USA Rare Earth jumped the day its deal was announced.Get Matt McCall's full briefing on this overlooked mining stock now 1/15/20231,200,000 shares $3.41 million -3.2%N/A3.6 $2.84 12/30/20221,240,000 shares $2.93 million +0.8%N/A3.3 $2.36 12/15/20221,230,000 shares $2.85 million +1.7%N/A3.4 $2.32 11/30/20221,210,000 shares $2.89 million +5.2%N/A3.3 $2.39 11/15/20221,150,000 shares $2.58 million +15.4%N/A3.3 $2.24 10/31/2022996,800 shares $4.67 million +21.3%N/A3.8 $4.68 10/15/2022822,000 shares $1.57 million -0.9%N/A4.5 $1.91 9/30/2022829,600 shares $1.68 million -0.7%N/A8.3 $2.02 9/15/2022835,100 shares $2.51 million +0.1%N/A7.8 $3.00 8/31/2022834,400 shares $2.55 million -6.1%N/A7.1 $3.06 8/15/2022888,700 shares $2.88 million +5.9%N/A6.6 $3.24 7/31/2022838,900 shares $2.15 million -2.3%N/A5.4 $2.56 7/15/2022858,900 shares $2.16 million -4.1%N/A5.3 $2.52 6/30/2022895,600 shares $2.00 million -0.3%N/A4.7 $2.23 6/15/2022897,800 shares $2.22 million +6.0%N/A3 $2.47 5/31/2022847,000 shares $2.58 million -10.1%N/A3 $3.05 5/15/2022942,500 shares $2.51 million +8.6%N/A3.4 $2.66 4/30/2022867,800 shares $2.36 million -5.2%N/A3.5 $2.72 4/15/2022915,500 shares $3.22 million -8.5%N/A3.5 $3.52 3/31/20221,000,000 shares $6.68 million No ChangeN/A4 $6.68 3/15/20221,000,000 shares $5.38 million +1.2%N/A7.3 $5.38 2/28/2022988,000 shares $6.03 million -1.1%N/A7 $6.10 2/15/2022999,200 shares $6.48 million +1.3%N/A7.1 $6.49 1/31/2022986,700 shares $5.27 million +15.4%N/A5.8 $5.34 1/15/2022854,700 shares $4.73 million +10.0%N/A5.6 $5.53 12/31/2021776,800 shares $4.30 million -2.4%N/A5.1 $5.53 12/15/2021796,100 shares $5.10 million +9.6%N/A5.1 $6.40 11/30/2021726,200 shares $4.89 million +11.8%N/A4.4 $6.74 11/15/2021649,600 shares $4.85 million -3.5%N/A3.7 $7.47 SLS Short Interest - Frequently Asked Questions What is SELLAS Life Sciences Group's current short interest? Short interest is the volume of SELLAS Life Sciences Group shares that have been sold short but have not yet been covered or closed out. As of October 15th, investors have sold 53,759,252 shares of SLS short. 26.97% of SELLAS Life Sciences Group's shares are currently sold short. Learn More on SELLAS Life Sciences Group's current short interest. What is a good short interest ratio for SELLAS Life Sciences Group? 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. SLS shares currently have a short interest ratio of 12.0. Learn More on SELLAS Life Sciences Group's short interest ratio. What is a good short interest percentage for SELLAS Life Sciences Group? 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. 26.97% of SELLAS Life Sciences Group's floating shares are currently sold short. Is SELLAS Life Sciences Group's short interest increasing or decreasing? SELLAS Life Sciences Group saw a drop in short interest since the prior report. As of October 15th, there was short interest totaling 53,759,252 shares, a drop of 2.5% from the previous total of 55,128,974 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 SELLAS Life Sciences Group's short interest compare to its competitors? 26.97% of SELLAS Life Sciences Group's shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to SELLAS Life Sciences Group: Arrowhead Pharmaceuticals, Inc. (8.07%), Abivax SA Sponsored ADR (8.29%), Cytokinetics, Incorporated (15.37%), Ionis Pharmaceuticals, Inc. (12.66%), Alkermes plc (11.90%), Praxis Precision Medicines, Inc. (14.48%), Iovance Biotherapeutics, Inc. (14.11%), Kiniksa Pharmaceuticals International, plc (10.04%), Rhythm Pharmaceuticals, Inc. (17.06%), Ligand Pharmaceuticals Incorporated (13.29%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($71.77 billion), Invesco QQQ ($59.70 billion), iShares Russell 2000 ETF ($23.54 billion), Medtronic PLC ($13.33 billion), SPDR S&P Biotech ETF ($10.47 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($10.36 billion), Nebius Group N.V. ($8.98 billion), iShares 20+ Year Treasury Bond ETF ($8.92 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($8.10 billion), and iShares Semiconductor ETF ($7.74 billion). View all of the most shorted stocks. What does it mean to sell short SELLAS Life Sciences Group stock? Short selling SLS is an investing strategy that aims to generate trading profit from SELLAS Life Sciences Group as its price is falling. SLS shares are trading down $0.23 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 SELLAS Life Sciences Group? A short squeeze for SELLAS Life Sciences Group 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 SLS, which in turn drives the price of the stock up even further. How often is SELLAS Life Sciences Group's 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 SLS, twice per month. The most recent reporting period available is October, 15 2026. What do SLs' short interest metrics mean? Understanding short interest metrics can help you assess how traders are positioning around a stock like SLS:Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity. More Short Interest Resources from MarketBeat Related Companies ARWR Short Interest Data ABVX Short Interest Data CYTK Short Interest Data IONS Short Interest Data ALKS Short Interest Data PRAX Short Interest Data IOVA Short Interest Data KNSA Short Interest Data RYTM Short Interest Data LGND Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates Short interest data for NASDAQ:SLS is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 10/26/2026. FINRA publishes updated short interest twice a month. From Our PartnersA Simple Guide to Options Trading While It's Still FreeA free copy of Options Trading Made Simple is available now but wont stay that way for long. Chris Rowe cal...True Market Insiders | SponsoredFinancial legend: “This is bad, really bad...”Dr. Martin D. 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