Costar Group Inc
Costar Group Inc (CSGP) Unusual Options Activity Today
CSGP options volume power reached 2.33x on the previous trading day. The highest reading was on the $25 CALL expiring 2026-11-20.
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Checking CSGP unusual options activity helps you spot when traders are making outsized bets on Costar Group Inc before the broader market catches on. Costar Group Inc's unusual options activity flags contracts trading at multiples of their average daily volume, often signaling that informed money is positioning ahead of a catalyst. Use our scanner to monitor CSGP unusual options activity today and surface the prints that deserve a second look.
Unusual options flow typically refers to trades where volume vastly exceeds open interest at a given strike, or where total contract volume on a name spikes well above its norm. Watching CSGP unusual options flow today can reveal large block trades, sweeps across exchanges, and aggressive directional bets. Tracking CSGP unusual options volume across calls and puts helps you separate hedging activity from genuinely speculative positioning, and CSGP unusual options flow data becomes especially valuable around earnings, product launches, and macro events.
CoStar Group, Inc. provides information, analytics, and online marketplace services to the commercial real estate, hospitality, residential, and related professionals industries in the United States, Canada, Europe, the Asia Pacific, and Latin America. It offers CoStar Property that provides inventory of office, industrial, retail, multifamily, hospitality, and student housing properties and land; CoStar COMPS, a robust database of comparable commercial real estate sales transactions; CoStar Market Analytics to view and report on aggregated market and submarket trends; and CoStar Tenant, an online business-to-business prospecting and analytical tool that provides tenant information.
The company also provides Lease Comps and Analysis, a tool to capture, manage, and maintain lease data; CoStar Lease Analysis; Public Record, a searchable database of commercially-zoned parcels; CoStar Real Estate Manager, a real estate lease administration, portfolio management, and lease accounting compliance software solution; and CoStar Risk Analytics and CoStar Investment. In addition, it offers apartment marketing sites, such as ApartmentFinder.com, ForRent.com, ApartmentHomeLiving.com, WestsideRentals.com, AFTER55.com, CorporateHousing.com, ForRentUniversity.com, Apartamentos.com, and Off Campus Partners; LoopNet Premium Lister; LoopNet Diamond, Platinum, and Gold Ads; LandsofAmerica.com, LandAndFarm.com, and LandWatch.com for rural land for-sale; BizBuySell.com, BizQuest.com, and FindaFranchise.com for operating businesses and franchises for-sale; Ten-X, an online auction platform for commercial real estate; and HomeSnap, an online and mobile software platform, as well as Homes.com, a homes for sale listings site. CoStar Group, Inc. was founded in 1987 and is headquartered in Washington, the District of Columbia.
Catalysts rarely arrive without a footprint, and CSGP unusual options activity is often where that footprint shows up first. Our scanner tracks Costar Group Inc's unusual options flow in real time, ranks prints by volume-to-open-interest, premium spent, and aggressor side, and separates real conviction from noise. Whether you're looking at CSGP unusual options volume on the call side or chasing put sweeps, Costar Group Inc's unusual options flow today is one click away, so put it on your radar before the headlines hit.
| 30.00 | 0.20 | 0.35 | 0.28 | 51% | 16 | 840 | 1.90% |
| 35.00 | — | 0.15 | 0.15 | 80% | 4 | 1,125 | 0.36% |
| 15.00 | 11.00 | 12.90 | 11.95 | 25% | 0 | 6 | 0.00% |
| 17.50 | 8.50 | 10.40 | 9.45 | 18% | 0 | 0 | — |
| 20.00 | 6.10 | 7.90 | 7.00 | 62% | 0 | 1 | 0.00% |
| 30.00 | 2.90 | 3.60 | 3.25 | 50% | 13 | 830 | 1.57% |
| 25.00 | 0.30 | 0.50 | 0.40 | 51% | 10 | 2,216 | 0.45% |
| 35.00 | 7.70 | 8.40 | 8.05 | 68% | 2 | 547 | 0.37% |
| 15.00 | — | 0.15 | 0.15 | 168% | 0 | 8 | 0.00% |
| 17.50 | — | 0.45 | 0.45 | 171% | 0 | 4 | 0.00% |
As of September 29, 2026
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