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CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage. It primarily sells high-margin software-as-a-service subscriptions that provide institutional clients with forensic property data and premium advertising visibility. With operations across North America, Europe, and Asia-Pacific, CoStar maintains the industry's most comprehensive centralized real estate database, functioning as a critical information utility for brokers, lenders, and owners worldwide.
Costar Group trades on the NASDAQ stock market under the symbol CSGP.
As of August 25, 2026, CSGP stock price declined to $32.71 with 2,021,191 million shares trading.
CSGP has a beta of 0.51, meaning it tends to be less sensitive to market movements. CSGP has a correlation of 0.02 to the broad based SPY ETF.
CSGP has a market cap of $13.25 billion. This is considered a Large Cap stock.
Last quarter Costar Group reported $925 million in Revenue and $.32 earnings per share. This fell short of revenue expectation by $-4 million and exceeded earnings estimates by $.05.
In the last 3 years, CSGP traded as high as $100.38 and as low as $25.89.
The top ETF exchange traded funds that CSGP belongs to (by Net Assets): VNQ, VTI, VOO, AKRE, RSP.
CSGP has underperformed the market in the last year with a return of -64.1%, while the SPY ETF gained +19.7%. In the last 3 month period, CSGP fell short of the market, returning -3.7%, while SPY returned +2.8%. However, in the most recent 2 weeks CSGP has outperformed the stock market by returning +3.9%, while SPY returned -1.0%.
CSGP support price is $31.69 and resistance is $33.99 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that CSGP shares will trade within this expected range on the day.
