This company has been marked as potentially delisted and may not be actively trading. Gritstone bio (GRTS) Short Interest Ratio & Short Volume Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsEarningsHeadlinesInsider TradesOwnershipTrendsBuy This Stock Gritstone bio Short Interest DataGritstone bio (GRTS) has a short interest of 7.53 million shares, representing 6.83% of the float (the number of shares available for trading by the public). This marks a 13.57% increase in short interest from the previous month. The short interest ratio (days to cover) is 3.6, indicating that it would take 3.6 days of the average trading volume of 7.01 million shares to cover all short positions.Current Short Interest7,530,000 sharesPrevious Short Interest6,630,000 sharesChange Vs. Previous Month+13.57%Dollar Volume Sold Short$4.37 millionShort Interest Ratio3.6 Days to CoverLast Record DateSeptember 30, 2024Outstanding Shares108,569,000 sharesFloat Size110,210,000 sharesShort Percent of Float6.83%Today's Trading Volume61,017,902 sharesAverage Trading Volume7,014,435 sharesToday's Volume Vs. Average870% Short Selling Gritstone bio? Sign up to receive the latest short interest report for Gritstone bio and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartGRTS Short Interest Over TimeGRTS Days to Cover Over TimeGRTS Percentage of Float Shorted Over Time Remove Ads Gritstone bio Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/30/20247,530,000 shares $4.37 million +13.6%6.8%3.6 $0.58 9/15/20246,630,000 shares $3.65 million -4.3%6.0%5.3 $0.55 8/31/20246,930,000 shares $3.30 million -3.5%6.3%5.6 $0.48 8/15/20247,180,000 shares $3.81 million -8.5%6.6%5.1 $0.53 7/31/20247,850,000 shares $4.72 million -3.0%7.9%4.8 $0.60 7/15/20248,090,000 shares $5.32 million -26.9%8.1%4.5 $0.66 6/30/202411,070,000 shares $6.84 million No Change11.1%5 $0.62 6/15/202411,070,000 shares $8.66 million -4.5%11.1%4 $0.78 5/31/202411,590,000 shares $8.97 million -8.7%11.7%4.1 $0.77 5/15/202412,690,000 shares $9.52 million -16.0%12.8%4.3 $0.75 Get the Latest News and Ratings for GRTS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Gritstone bio and its competitors with MarketBeat's FREE daily newsletter. 4/30/202415,110,000 shares $12.09 million +18.1%15.4%5.3 $0.80 4/15/202412,800,000 shares $9.46 million +40.4%13.2%4.4 $0.74 3/31/20249,120,000 shares $23.44 million +3.4%9.4%3.3 $2.57 3/15/20248,820,000 shares $20.99 million +7.3%9.9%4.3 $2.38 2/29/20248,220,000 shares $23.02 million -10.1%9.2%4 $2.80 2/15/20249,140,000 shares $19.93 million +1.7%10.5%4.9 $2.18 1/31/20248,990,000 shares $21.49 million -4.3%10.4%4.9 $2.39 1/15/20249,390,000 shares $26.48 million +4.9%10.7%5.9 $2.82 12/31/20238,950,000 shares $18.26 million +2.9%10.2%4.9 $2.04 12/15/20238,700,000 shares $16.53 million -4.5%9.9%3.3 $1.90 11/30/20239,110,000 shares $11.84 million +8.2%10.4%3.7 $1.30 11/15/20238,420,000 shares $12.12 million -7.7%9.6%3.7 $1.44 10/31/20239,120,000 shares $17.33 million -3.9%10.8%4.3 $1.90 10/15/20239,490,000 shares $22.30 million +16.2%11.2%4.6 $2.35 9/30/20238,170,000 shares $14.05 million +14.4%9.7%4.7 $1.72 9/15/20237,140,000 shares $11.00 million -4.0%8.5%15.2 $1.54 8/31/20237,440,000 shares $13.54 million -2.5%8.9%10.3 $1.82 8/15/20237,630,000 shares $13.20 million +3.0%9.1%9.4 $1.73 7/31/20237,410,000 shares $14.60 million -7.1%9.6%8.6 $1.97 7/15/20237,980,000 shares $16.92 million +3.6%10.3%9.4 $2.12 6/30/20237,700,000 shares $15.02 million +58.8%9.9%8.7 $1.95 6/15/20234,850,000 shares $10.96 million +10.2%6.3%5.6 $2.26 5/31/20234,400,000 shares $8.49 million +11.4%5.8%6.8 $1.93 5/15/20233,950,000 shares $8.16 million No Change5.2%6.8 $2.07 10/31/20225,800,000 shares $18.68 million +8.4%N/A6.3 $3.22 10/15/20225,350,000 shares $12.63 million -2.0%N/A6.6 $2.36 9/30/20225,460,000 shares $14.03 million +9.2%N/A6.6 $2.57 9/15/20225,000,000 shares $20 million +11.4%N/A5.2 $4.00 8/31/20224,490,000 shares $14.77 million +104.1%N/A4.2 $3.29 8/15/20222,200,000 shares $8.95 million -9.8%N/A1.9 $4.07Trump Treasure April 19 (Ad)Thanks to President Trump… A $900 investment across5 specific cryptos… Could gain 12,000% so quickly that, just 12 months later…If I’m right about this (like I was before) a modest $900 investment… 7/31/20222,440,000 shares $6.20 million +3.0%N/A2.3 $2.54 7/15/20222,370,000 shares $6.35 million -15.7%N/A2.1 $2.68 6/30/20222,810,000 shares $6.80 million -23.9%N/A2.3 $2.42 6/15/20223,690,000 shares $8.08 million -11.9%N/A2.8 $2.19 5/31/20224,190,000 shares $8.46 million +5.8%N/A3.2 $2.02 5/15/20223,960,000 shares $8.59 million +25.3%N/A3 $2.17 4/30/20223,160,000 shares $8.18 million -3.7%N/A2.4 $2.59 4/15/20223,280,000 shares $12.10 million +0.6%N/A2.5 $3.69 3/31/20223,260,000 shares $13.43 million -24.5%N/A2.2 $4.12 3/15/20224,320,000 shares $19.22 million +3.6%N/A2.3 $4.45 2/28/20224,170,000 shares $21.27 million -16.4%N/A2.2 $5.10 2/15/20224,990,000 shares $27.89 million +1.0%N/A2.4 $5.59 1/31/20224,940,000 shares $26.97 million +10.8%N/A2.5 $5.46 1/15/20224,460,000 shares $27.88 million +15.3%N/A2.2 $6.25 12/31/20213,870,000 shares $49.77 million +73.5%N/A2.1 $12.86 12/15/20212,230,000 shares $26.98 million +20.5%N/A1.7 $12.10 11/30/20211,850,000 shares $24.42 million +5.1%N/A1.5 $13.20 11/15/20211,760,000 shares $19.78 million -15.4%N/A1.7 $11.24 10/29/20212,080,000 shares $22.86 million +18.9%N/A2 $10.99 10/15/20211,750,000 shares $16.08 million -52.7%N/A1.7 $9.19 9/30/20213,700,000 shares $39.96 million -44.4%9.4%4 $10.80 9/15/20216,660,000 shares $85.18 million +5.2%15.8%7.5 $12.79 8/31/20216,330,000 shares $58.24 million +5.3%15.0%9.4 $9.20 8/13/20216,010,000 shares $48.62 million +8.5%14.4%9.8 $8.09 7/30/20215,540,000 shares $37.01 million +8.8%13.4%10.3 $6.68 7/15/20215,090,000 shares $38.79 million +5.6%12.4%11.4 $7.62 6/30/20214,820,000 shares $44.01 million +5.7%11.7%9.6 $9.13 6/15/20214,560,000 shares $44.41 million -3.4%11.1%6.3 $9.74 5/28/20214,720,000 shares $43.42 million +12.4%11.5%6.3 $9.20 5/14/20214,200,000 shares $34.23 million +0.5%N/A5.5 $8.15 4/30/20214,180,000 shares $38.54 million -0.5%N/A4.9 $9.22 4/15/20214,200,000 shares $35.99 million +34.2%N/A3.3 $8.57 3/31/20213,130,000 shares $27.64 million +1.6%8.8%1 $8.83 3/15/20213,080,000 shares $46.05 million +0.3%8.7%1 $14.95 2/26/20213,070,000 shares $40.74 million +8.1%9.1%1 $13.27 2/12/20212,840,000 shares $41.35 million +123.6%8.4%0.9 $14.56 1/29/20211,270,000 shares $21.79 million -27.4%3.7%0.4 $17.16 1/15/20211,750,000 shares $10.42 million +4.8%5.3%0.6 $5.96 12/31/20201,670,000 shares $6.83 million -10.2%5.2%4.1 $4.09 12/15/20201,860,000 shares $5.67 million -13.1%7.4%6.2 $3.05 11/30/20202,140,000 shares $7.00 million +10.3%8.5%7.5 $3.27 11/15/20201,940,000 shares $5.37 million -2.5%7.7%6.8 $2.77 10/30/20201,990,000 shares $5.53 million +1.0%7.9%6.7 $2.78 10/15/20201,970,000 shares $5.89 million -15.8%8.1%5.2 $2.99 9/30/20202,340,000 shares $6.20 million -2.5%9.7%3.2 $2.65 9/15/20202,400,000 shares $7.63 million +15.4%9.9%3 $3.18 8/31/20202,080,000 shares $6.88 million +3.0%8.6%2.7 $3.31 8/14/20202,020,000 shares $7.15 million -23.5%8.4%2.7 $3.54 7/31/20202,640,000 shares $8.45 million -7.7%11.6%3.6 $3.20 7/15/20202,860,000 shares $11.13 million -14.9%12.8%4.4 $3.89Trump Treasure April 19 (Ad)Thanks to President Trump… A $900 investment across5 specific cryptos… Could gain 12,000% so quickly that, just 12 months later…If I’m right about this (like I was before) a modest $900 investment… 6/30/20203,360,000 shares $22.44 million -2.6%15.0%11.1 $6.68 6/15/20203,450,000 shares $21.91 million +0.3%15.4%16.9 $6.35 5/29/20203,440,000 shares $22.60 million -5.0%15.4%18.5 $6.57 5/15/20203,620,000 shares $22.73 million +10.4%16.2%21.8 $6.28 4/30/20203,280,000 shares $22.99 million -2.1%12.2%22.2 $7.01 4/15/20203,350,000 shares $22.34 million No Change16.2%24.3 $6.67 GRTS Short Interest - Frequently Asked Questions What is Gritstone bio's current short interest? Short interest is the volume of Gritstone bio shares that have been sold short but have not yet been covered or closed out. As of September 30th, traders have sold 7,530,000 shares of GRTS short. 6.83% of Gritstone bio's shares are currently sold short. Learn More on Gritstone bio's current short interest. What is a good short interest ratio for Gritstone bio? 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. GRTS shares currently have a short interest ratio of 4.0. Learn More on Gritstone bio's short interest ratio. Which institutional investors are shorting Gritstone bio? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Gritstone bio: Group One Trading LLC, Citadel Advisors LLC, and 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 Gritstone bio? 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 Gritstone bio's floating shares are currently sold short. Is Gritstone bio's short interest increasing or decreasing? Gritstone bio saw a increase in short interest in the month of September. As of September 30th, there was short interest totaling 7,530,000 shares, an increase of 13.6% from the previous total of 6,630,000 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. What is Gritstone bio's float size? Gritstone bio currently has issued a total of 108,569,000 shares. Some of Gritstone bio's 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. Gritstone bio currently has a public float of 110,210,000 shares. How does Gritstone bio's short interest compare to its competitors? 6.83% of Gritstone bio's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Gritstone bio: Equillium, Inc. (2.08%), Cingulate Inc. (3.00%), ABVC BioPharma, Inc. (2.86%), GlycoMimetics, Inc. (4.38%), BriaCell Therapeutics Corp. (5.42%), IN8bio, Inc. (2.58%), NextCure, Inc. (0.30%), 23andMe Holding Co. (11.90%), Marker Therapeutics, Inc. (4.99%), Carisma Therapeutics, Inc. (2.04%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Charter Communications, Inc. ($4.04 billion), AppLovin Co. ($2.69 billion), Nu Holdings Ltd. ($2.64 billion), Paychex, Inc. ($2.61 billion), Cencora, Inc. ($2.30 billion), Aptiv PLC ($2.09 billion), Moderna, Inc. ($2.09 billion), Tractor Supply ($2.04 billion), Coinbase Global, Inc. ($1.97 billion), and International Paper ($1.95 billion). View all of the most shorted stocks. What does it mean to sell short Gritstone bio stock? Short selling GRTS is an investing strategy that aims to generate trading profit from Gritstone bio 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 Gritstone bio? A short squeeze for Gritstone bio 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 GRTS, which in turn drives the price of the stock up even further. How often is Gritstone bio'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 GRTS, twice per month. The most recent reporting period available is September, 30 2024. More Short Interest Resources from MarketBeat Related Companies EQ Short Interest CING Short Interest ABVC Short Interest GLYC Short Interest BCTX Short Interest INAB Short Interest NXTC Short Interest ME Short Interest MRKR Short Interest CARM 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:GRTS) was last updated on 4/5/2025 by MarketBeat.com Staff From Our PartnersFeds Just Admitted It—They Can Take Your CashThe Government Just Said Your Money Isn't Yours That's right—According to the DOJ, YOUR hard-earned money i...Priority Gold | Sponsored“Fed Proof” Your Bank Account with THESE 4 Simple StepsStarting as soon as a few months from now, the United States government will make a sweeping change to bank ac...Weiss Ratings | SponsoredElon Set to Shock the World by May 1st ?Tech legend Jeff Brown recently traveled to the industrial zone of South Memphis to investigate what he believ...Brownstone Research | SponsoredAmerica’s Retirement Accounts Are at Risk—Here’s WhyWhen Trump took office in 2017, gold was just $1,100 an ounce. By the time he left, it had soared to $1,839. ...Premier Gold Co | SponsoredElon Musk Confirms: Tesla’s Optimus is Replacing Workers… and Heading to MarsMusk confirmed that SpaceX's Starship will carry Optimus to Mars in 2026 as part of an autonomous mission to h...InvestorPlace | SponsoredTrump’s Final Plan Presidential insider exposes shocking plot to reshape U.S. economy: The 2025 Trump Reset -- Inside Trump’...Porter & Company | SponsoredTrump’s Secret WeaponPlease don't wait—this is your moment to take action. Download your Wealth Protection Guide now, claim your fr...American Alternative | SponsoredNew “Trump” currency proposed in DCAfter a massive run-up – tech stocks are crashing. And as you’d suspect, the rich and powerful got out firs...Paradigm Press | Sponsored Adding Choose a watchlist: Watchlist Adding You have already added five stocks to your watchlist. Upgrade to MarketBeat All Access to add more stocks to your watchlist. Adding Gritstone bio, Inc. Please log in to your account or sign up in order to add this asset to your watchlist. Share Gritstone bio With A Colleague Link copied to clipboard. Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. Start Your 30-Day Trial MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. Stock Ideas and Recommendations See daily stock ideas from top analysts. Receive short-term trading ideas from MarketBeat. Identify trending stocks on social media. Advanced Stock Screeners and Research Tools Use our seven stock screeners to find suitable stocks. Stay informed with MarketBeat's real-time news. Export data to Excel for personal analysis. Sign in to your free account to enjoy these benefits In-depth profiles and analysis for 20,000 public companies. Real-time analyst ratings, insider transactions, earnings data, and more. Our daily ratings and market update email newsletter. Sign in to your free account to enjoy all that MarketBeat has to offer. Sign In Create Account Your Email Address: Email Address Required Your Password: Password Required Log In or Sign in with Facebook Sign in with Google Forgot your password? Your Email Address: Please enter your email address. Please enter a valid email address Choose a Password: Please enter your password. Your password must be at least 8 characters long and contain at least 1 number, 1 letter, and 1 special character. Create My Account (Free) or Sign in with Facebook Sign in with Google By creating a free account, you agree to our terms of service. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.