CoStar Group (CSGP) Options Chain & Prices $29.58 -0.76 (-2.50%) Closing price 04:00 PM EasternExtended Trading$29.56 -0.02 (-0.06%) As of 07:59 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 Massive. Learn more. Add Compare Share Share Options Chain Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsInsider TradesNews and TrendsOptions ChainOwnershipSEC FilingsShort Interest CSGP Put and Call Options List 1/21/2028 9/17/2027 6/17/2027 4/16/2027 3/19/2027 1/15/2027 12/18/2026 10/16/2026 9/18/2026 Options Date Put and Call Options Put Options Call Options Options Type All In The Money Out of The Money Moneyness With Volume Without Volume All Volume Strike Price Min Strike Price Max Export ExpiresStrike PriceClose PricePut/CallVolumeVolume AskVolume BidOpen InterestImplied VolatilityDeltaTrades9/18/2026$25.00$0.024Put6 - - 856(+0)55.85% (-7.79%)-0.02475929/18/2026$30.00$1.123Put15828942(+3781)48.86% (-1.27%)-0.55467979/18/2026$30.00$0.734Call114 - 434(+59)48.86% (-1.27%)0.44969159/18/2026$35.00$5.441Put43 - 631(-7)54.17% (-3.59%)-0.98420839/18/2026$35.00$0.025Call3 - 31541(+0)54.17% (-3.59%)0.0281452End-of-day options data provided by Trade Alert and Intrinio. Related Companies and Tools Related Companies CBRE Options BEKE Options JLL Options CIGI Options CWK Options OPEN Options NMRK Options MMI Options AGNT Options RMR Options Options Chain Tools Short Interest TrackerShort Interest IncreasesShort Interest DecreasesUnusual Call VolumeUnusual Put Volume This page (NASDAQ:CSGP) was last updated on 9/9/2026 by MarketBeat.com Staff. 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