CoStar Group (CSGP) Options Chain & Prices $26.95 -0.07 (-0.26%) Closing price 09/29/2026 04:00 PM EasternExtended Trading$27.18 +0.23 (+0.87%) As of 04:41 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. Add Compare Share Share Options Chain Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsInsider TradesNews and TrendsOptions ChainOwnershipSEC FilingsShort Interest CSGP Put and Call Options List 1/19/2029 1/21/2028 9/17/2027 6/17/2027 4/16/2027 3/19/2027 1/15/2027 12/18/2026 11/20/2026 10/16/2026 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 VolatilityDeltaTrades10/16/2026$25.00$0.437Put10362216(+1)52.33% (+2.09%)-0.234138310/16/2026$30.00$3.316Put13 - 12830(-13)51.60% (+1.27%)-0.818514910/16/2026$30.00$0.289Call1692840(+1)51.60% (+1.27%)0.1871114End-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 NMRK Options OPEN 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 9/29/2026 by MarketBeat.com Staff. From Our PartnersDr. Ron Paul Issues New Warning: “The Next Financial Crisis Is Here”Dr. Ron Paul warns a dangerous experiment is already underway in Washington, involving at least 27 billion dol...Altimetry | SponsoredThis AI Stock Reminds One Analyst of Early NvidiaJeff Brown picked Nvidia in 2016, before shares surged 37,800 percent. 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