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SELLAS Life Sciences Group (SLS) Short Interest Ratio & Short Volume

SELLAS Life Sciences Group logo
$13.70 -0.46 (-3.25%)
Closing price 09/3/2026 04:00 PM Eastern
Extended Trading
$13.62 -0.08 (-0.57%)
As of 08:54 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.
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SELLAS Life Sciences Group Short Interest Overview

As of August 14, 2026, SELLAS Life Sciences Group (SLS) had a short interest of 56.37 million shares sold short, representing 28.28% of the public float. This marks a 2.54% increase in short interest since the prior report. The short interest ratio (days to cover) is 10.4, meaning it would take 10.4 days of the average trading volume of 7.12 million shares to cover all short positions.

Current Short Interest
56,371,865 shares
Previous Short Interest
54,975,815 shares
Change Vs. Previous Month
2.54%
Dollar Volume Sold Short
$720.43 million
Short Interest Ratio
10.4 Days to Cover
Last Record Date
August 14, 2026
Outstanding Shares
201,950,000 shares
Short Percent of Float
28.28%
Today's Trading Volume
5,773,759 shares
Average Trading Volume
7,124,695 shares
Today's Volume Vs. Average
81%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

SLS Short Interest Over Time

SLS Days to Cover Over Time

SLS Percentage of Float Shorted Over Time

SELLAS Life Sciences Group Tesla Short Interest History & Recent Changes

Export
Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
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
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 $1.18
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
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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 $3.32
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
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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
10/29/2021672,900 shares $5.85 million -22.1%N/A3.7 $8.69
10/15/2021863,200 shares $7.62 million +4.1%N/A4.3 $8.83
9/30/2021829,200 shares $7.60 million +7.2%N/A3.6 $9.16
9/15/2021773,700 shares $7.78 million -14.2%N/A1.7 $10.05

SLS Short Interest - Frequently Asked Questions

Short interest is the volume of SELLAS Life Sciences Group shares that have been sold short but have not yet been closed out or covered. As of August 14th, investors have sold 56,371,865 shares of SLS short. 28.28% of SELLAS Life Sciences Group's shares are currently sold short. Learn More on SELLAS Life Sciences Group's current short interest.

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 10.4. Learn More on SELLAS Life Sciences Group's short interest ratio.

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. 28.28% of SELLAS Life Sciences Group's floating shares are currently sold short.

SELLAS Life Sciences Group saw a increase in short interest during the month of August. As of August 14th, there was short interest totaling 56,371,865 shares, an increase of 2.5% from the previous total of 54,975,815 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.

28.28% 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: Halozyme Therapeutics, Inc. (13.23%), Arrowhead Pharmaceuticals, Inc. (6.78%), Madrigal Pharmaceuticals, Inc. (10.64%), Summit Therapeutics PLC (28.44%), Praxis Precision Medicines, Inc. (13.72%), Krystal Biotech, Inc. (12.46%), Abivax SA Sponsored ADR (6.88%), Protagonist Therapeutics, Inc. (12.70%), Kymera Therapeutics, Inc. (14.86%), Ionis Pharmaceuticals, Inc. (12.81%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($71.57 billion), Invesco QQQ ($46.97 billion), iShares Russell 2000 ETF ($24.02 billion), Nebius Group N.V. ($15.37 billion), Sandisk Corporation ($12.60 billion), SPDR S&P Biotech ETF ($12.14 billion), Western Digital Corporation ($10.32 billion), iShares 20+ Year Treasury Bond ETF ($8.38 billion), VanEck Semiconductor ETF ($7.62 billion), and iShares iBoxx $ High Yield Corporate Bond ETF ($7.07 billion). View all of the most shorted stocks.

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 $0.46 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.

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.

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 August, 14 2026.

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.


Related Companies
Short Interest Tools

Short interest data for NASDAQ:SLS is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 8/25/2026. FINRA publishes updated short interest twice a month.
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