CoStar Group (CSGP) Short Interest Ratio & Short Volume $81.07 +2.15 (+2.72%) Closing price 04:00 PM EasternExtended Trading$79.71 -1.36 (-1.68%) As of 07:29 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock CoStar Group Short Interest DataCoStar Group (CSGP) has a short interest of 17.23 million shares, representing 4.27% of the float (the number of shares available for trading by the public). This marks a -2.21% decrease in short interest from the previous month. The short interest ratio (days to cover) is 4.8, indicating that it would take 4.8 days of the average trading volume of 2.92 million shares to cover all short positions.Current Short Interest17,230,000 sharesPrevious Short Interest17,620,000 sharesChange Vs. Previous Month-2.21%Dollar Volume Sold Short$1.31 billionShort Interest Ratio4.8 Days to CoverLast Record DateMay 15, 2025Outstanding Shares421,887,000 sharesShort Percent of Float4.27%Today's Trading Volume2,611,394 sharesAverage Trading Volume2,919,038 sharesToday's Volume Vs. Average89% Short Selling CoStar Group? Sign up to receive the latest short interest report for CoStar Group and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCSGP Short Interest Over TimeCSGP Days to Cover Over TimeCSGP Percentage of Float Shorted Over Time CoStar Group Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/202517,230,000 shares $1.31 billion -2.2%4.3%4.8 $76.05 4/30/202517,620,000 shares $1.31 billion -0.5%N/A4.7 $74.17 4/15/202517,710,000 shares $1.43 billion +1.3%4.4%5.1 $80.51 3/31/202517,490,000 shares $1.39 billion +8.0%4.3%5.1 $79.23 3/15/202516,200,000 shares $1.28 billion +2.7%4.0%5 $78.73 2/28/202515,770,000 shares $1.20 billion +5.8%3.9%5.1 $76.25 2/15/202514,900,000 shares $1.10 billion +14.7%3.7%5.5 $74.06 1/31/202512,990,000 shares $995.03 million -2.8%N/A5.2 $76.60 1/15/202513,370,000 shares $978.95 million +5.3%N/A4.6 $73.22 12/31/202412,700,000 shares $909.19 million +8.1%N/A4.5 $71.59 Get the Latest News and Ratings for CSGP and Related StocksEnter your email address below to receive the latest news and analysts' ratings for CoStar Group and its competitors with MarketBeat's FREE daily newsletter. 12/15/202411,750,000 shares $882.07 million +5.7%N/A4.1 $75.07 11/30/202411,120,000 shares $904.50 million +0.5%N/A4.1 $81.34 11/15/202411,060,000 shares $788.03 million -7.2%N/A4.1 $71.25 10/31/202411,920,000 shares $867.66 million +47.7%N/A4.7 $72.79 10/15/20248,070,000 shares $631.24 million +4.5%N/A3.4 $78.22 9/30/20247,720,000 shares $582.40 million -4.6%N/A3.4 $75.44 9/15/20248,090,000 shares $638.06 million +8.6%N/A3.5 $78.87 8/31/20247,450,000 shares $575.89 million +4.3%N/A3 $77.30 8/15/20247,140,000 shares $532.29 million +4.2%N/A2.8 $74.55 7/31/20246,850,000 shares $534.44 million -10.6%N/A2.7 $78.02 7/15/20247,660,000 shares $582.24 million -11.1%N/A3 $76.01 6/30/20248,620,000 shares $639.09 million -6.7%N/A3.7 $74.14 6/15/20249,240,000 shares $683.11 million +3.6%N/A4.2 $73.93 5/31/20248,920,000 shares $697.28 million +1.6%N/A4.1 $78.17 5/15/20248,780,000 shares $776.85 million -5.6%N/A4.2 $88.48 4/30/20249,300,000 shares $851.23 million +7.8%N/A4 $91.53 4/15/20248,630,000 shares $755.38 million -0.9%N/A3.8 $87.53 3/31/20248,710,000 shares $841.39 million +38.3%N/A4 $96.60 3/15/20246,300,000 shares $599.63 million +11.1%N/A2.9 $95.18 2/29/20245,670,000 shares $493.46 million +19.4%N/A2.8 $87.03 2/15/20244,750,000 shares $394.06 million -0.8%N/A2.4 $82.96 1/31/20244,790,000 shares $399.87 million -2.8%N/A2.6 $83.48 1/15/20244,930,000 shares $411.16 million -12.7%N/A2.4 $83.40 12/31/20235,650,000 shares $493.75 million -12.1%N/A2.8 $87.39 12/15/20236,430,000 shares $563.08 million +1.4%N/A3.2 $87.57 11/30/20236,340,000 shares $526.47 million -4.7%N/A3.2 $83.04 11/15/20236,650,000 shares $547.03 million +2.0%N/A3.6 $82.26 10/31/20236,520,000 shares $478.63 million +16.9%N/A3.8 $73.41 10/15/20235,580,000 shares $448.07 million +6.9%N/A3.2 $80.30 9/30/20235,220,000 shares $401.37 million -14.1%N/A2.9 $76.89The End of Elon Musk…? 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According to his research, if you listen to the media and miss out on Elon's newest breakthrough, it's going to cost you the fortune of a lifetime.Click here to see why the "End of Elon" crowd is about to be wrong again. 9/15/20236,080,000 shares $481.05 million -15.1%N/A2.4 $79.12 8/31/20237,160,000 shares $587.05 million -21.6%N/A2.5 $81.99 8/15/20239,130,000 shares $729.21 million -5.8%N/A3.1 $79.87 7/31/20239,690,000 shares $813.67 million -11.7%N/A3.3 $83.97 7/15/202310,970,000 shares $979.51 million +55.6%N/A3.7 $89.29 6/30/20237,050,000 shares $627.45 million +10.5%N/A2.6 $89.00 6/15/20236,380,000 shares $536.37 million +4.4%N/A2.9 $84.07 5/31/20236,110,000 shares $485.13 million -0.7%N/A3.3 $79.40 5/15/20236,150,000 shares $467.28 million +7.5%N/A3 $75.98 4/30/20235,720,000 shares $440.15 million +7.5%N/A2.7 $76.95 4/15/20235,320,000 shares $368.25 million -5.5%N/A2.5 $69.22 3/31/20235,630,000 shares $387.63 million +13.5%N/A2.6 $68.85 3/15/20234,960,000 shares $334.06 million +4.2%N/A2.4 $67.35 2/28/20234,760,000 shares $336.34 million +0.9%N/A1.9 $70.66 2/15/20234,720,000 shares $372.41 million -14.2%N/A1.9 $78.90 1/31/20235,500,000 shares $428.45 million -12.8%N/A2.3 $77.90 1/15/20236,310,000 shares $511.43 million +7.0%N/A2.5 $81.05 12/30/20225,900,000 shares $455.95 million +8.3%N/A2.3 $77.28 12/15/20225,450,000 shares $424.45 million +17.2%N/A2 $77.88 11/30/20224,650,000 shares $376.84 million -17.1%N/A1.4 $81.04 11/15/20225,610,000 shares $464.00 million -9.8%N/A1.7 $82.71 10/31/20226,220,000 shares $514.52 million -14.2%N/A1.9 $82.72 10/15/20227,250,000 shares $509.68 million -3.3%N/A2.4 $70.30 9/30/20227,500,000 shares $522.38 million +55.0%N/A2.5 $69.65 9/15/20224,840,000 shares $350.85 million +84.7%N/A1.7 $72.49 8/31/20222,620,000 shares $182.46 million -13.5%N/A1.3 $69.64 8/15/20223,030,000 shares $228.43 million -0.3%N/A1.7 $75.39 7/31/20223,040,000 shares $220.67 million -10.9%N/A1.6 $72.59 7/15/20223,410,000 shares $204.29 million -18.4%N/A1.7 $59.91 6/30/20224,180,000 shares $252.51 million -1.9%N/A2.1 $60.41 6/15/20224,260,000 shares $240.05 million +0.7%N/A2 $56.35 5/31/20224,230,000 shares $257.78 million -2.8%N/A1.9 $60.94 5/15/20224,350,000 shares $253.13 million -5.0%N/A1.6 $58.19 4/30/20224,580,000 shares $291.38 million +23.5%N/A1.7 $63.62 4/15/20223,710,000 shares $229.35 million -34.7%N/A1.4 $61.82 3/31/20225,680,000 shares $378.34 million +4.4%N/A2.1 $66.61 3/15/20225,440,000 shares $314.65 million +0.6%N/A2.1 $57.84 2/28/20225,410,000 shares $330.06 million +12.0%N/A2.2 $61.01 2/15/20224,830,000 shares $326.94 million +27.1%N/A2.1 $67.69 1/31/20223,800,000 shares $266.61 million +5.0%N/A2 $70.16 1/15/20223,620,000 shares $269.80 million -1.6%N/A0 $74.53 12/31/20213,680,000 shares $290.83 million -7.1%N/A2.1 $79.03 12/15/20213,960,000 shares $309.16 million +8.2%N/A2.4 $78.07 11/30/20213,660,000 shares $284.60 million -6.9%N/A2.4 $77.76 11/15/20213,930,000 shares $329.37 million -17.4%N/A2.6 $83.81 10/29/20214,760,000 shares $409.60 million +19.9%N/A3.3 $86.05 10/15/20213,970,000 shares $372.39 million +0.3%N/A2.7 $93.80 9/30/20213,960,000 shares $340.80 million -15.4%N/A2.6 $86.06 9/15/20214,680,000 shares $416.29 million +9.6%N/A2.5 $88.95 8/31/20214,270,000 shares $361.84 million +3.6%N/A2.1 $84.74Banks aren’t ready for this altcoin—are you? (Ad)Urgent Crypto Market Alert The last time we saw this pattern, early investors made fortunes...Go here now to discover the #1 crypto opportunity we're recommending in the market right now. 8/13/20214,120,000 shares $347.93 million -36.9%N/A2 $84.45 7/30/20216,530,000 shares $580.19 million +18.3%N/A3 $88.85 7/15/20215,520,000 shares $482.06 million +22.1%N/A2.5 $87.33 6/30/20214,520,000 shares $374.35 million +737.0%N/A2 $82.82 6/15/2021540,000 shares $4.69 million -7.7%1.4%2.5 $8.68 5/28/2021585,300 shares $499.85 million -1.9%1.5%2.7 $854.00 5/14/2021596,700 shares $483.81 million +9.9%N/A2 $810.81 4/30/2021542,800 shares $477.03 million +8.2%N/A1.7 $878.84 4/15/2021501,900 shares $449.34 million -9.8%N/A1.5 $895.28 3/31/2021556,300 shares $444.79 million +2.2%N/A1.6 $799.55 3/15/2021544,400 shares $445.62 million -24.8%N/A1.6 $818.55 2/26/2021724,200 shares $593.84 million +107.7%N/A2.3 $820.00 2/12/2021348,700 shares $322.51 million -3.2%N/A1.4 $924.89 1/29/2021360,300 shares $324.92 million +32.6%N/A1.7 $901.80 1/15/2021271,700 shares $235.91 million -21.6%N/A1.4 $868.28 12/31/2020346,700 shares $320.68 million +1.9%N/A2 $924.96 12/15/2020340,100 shares $290.17 million -16.5%N/A2 $853.20 11/30/2020407,100 shares $360.03 million +9.5%N/A2.4 $884.38 11/15/2020371,900 shares $341.06 million -10.9%N/A2.1 $917.08 10/30/2020417,600 shares $345.88 million +11.5%N/A2.4 $828.26 10/15/2020374,400 shares $325.51 million -30.0%N/A2 $869.41 9/30/2020534,700 shares $453.70 million +11.8%N/A2.3 $848.51 9/15/2020478,500 shares $403.38 million -8.3%N/A1.9 $843.00 8/31/2020521,600 shares $442.63 million -11.5%N/A2.1 $848.60 8/14/2020589,300 shares $489.34 million -18.5%N/A2.2 $830.37 7/31/2020723,000 shares $614.38 million -30.5%N/A2.3 $849.76 7/15/20201,040,000 shares $719.41 million No ChangeN/A3.2 $691.74 6/30/20201,040,000 shares $739.10 million +2.0%N/A3.4 $710.67 6/15/20201,020,000 shares $676.41 million +22.1%N/A3.1 $663.15 CSGP Short Interest - Frequently Asked Questions What is CoStar Group's current short interest? Short interest is the volume of CoStar Group shares that have been sold short but have not yet been covered or closed out. As of May 15th, investors have sold 17,230,000 shares of CSGP short. 4.27% of CoStar Group's shares are currently sold short. Learn More on CoStar Group's current short interest. What is a good short interest ratio for CoStar 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. CSGP shares currently have a short interest ratio of 5.0. Learn More on CoStar Group's short interest ratio. Which institutional investors are shorting CoStar Group? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of CoStar Group: Quaker Wealth Management LLC, Jane Street Group LLC, Millennium Management LLC, Cubist Systematic Strategies LLC, Caption Management LLC, BNP Paribas Financial Markets, Walleye Trading LLC, Walleye Capital LLC, Capital Fund Management S.A., Simplex Trading LLC, JPMorgan Chase & Co., Trium Capital LLP, FNY Investment Advisers LLC, and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for CoStar 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. 4.27% of CoStar Group's floating shares are currently sold short. Is CoStar Group's short interest increasing or decreasing? CoStar Group saw a drop in short interest during the month of May. As of May 15th, there was short interest totaling 17,230,000 shares, a drop of 2.2% from the previous total of 17,620,000 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 CoStar Group's short interest compare to its competitors? 4.27% of CoStar Group's shares are currently sold short. Here is how the short interest of companies compare to CoStar Group: Sea Limited (3.37%), Equinix, Inc. (1.93%), eBay Inc. (5.44%), VeriSign, Inc. (2.19%), Akamai Technologies, Inc. (5.17%), SPS Commerce, Inc. (3.90%), Yelp Inc. (5.87%), Ziff Davis, Inc. (8.20%), Cimpress plc (9.30%), QuinStreet, Inc. (2.34%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short CoStar Group stock? Short selling CSGP is an investing strategy that aims to generate trading profit from CoStar Group as its price is falling. CSGP shares are trading up $0.75 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 CoStar Group? A short squeeze for CoStar 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 CSGP, which in turn drives the price of the stock up even further. How often is CoStar 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 CSGP, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies SE Short Squeeze EQIX Short Squeeze EBAY Short Squeeze VRSN Short Squeeze AKAM Short Squeeze SPSC Short Squeeze YELP Short Squeeze ZD Short Squeeze CMPR Short Squeeze QNST 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:CSGP) was last updated on 6/10/2025 by MarketBeat.com Staff From Our PartnersElon’s NEXT Big IPO?Cancel your internet TODAY!? Take your latest internet bill and light it on fire… then count the seconds it...Banyan Hill Publishing | SponsoredTrump’s Exec Order #14154 could be a “Millionaire-Maker”Former Presidential Advisor, Jim Rickards, says Trump could “rewire our economy and hand millions of Americans...Paradigm Press | SponsoredElon’s BIGGEST warning yet?Tesla's About to Prove Everyone Wrong... 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