Costar Group Inc
Costar Group Inc (CSGP) Options Open Interest
CSGP options open interest is 75,192 contracts. The 2-week average daily volume is 2,959 contracts across the chain.
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Monitoring CSGP open interest helps you see where real money is positioned on Costar Group Inc's options and which strikes are attracting the most commitment from traders. Costar Group Inc's open interest reflects the total number of outstanding contracts that have not been closed or exercised, making it a powerful gauge of liquidity, conviction, and potential support and resistance zones. Use our scanner to monitor CSGP options open interest in real time and find the strikes that matter.
Open interest is distinct from volume: volume counts how many contracts are traded in a session, while open interest counts how many remain open at the end of the day. Rising CSGP options open interest alongside rising volume suggests new positions are being built, while falling open interest signals positions are being closed. Heavy open interest at specific strikes often acts as a magnet near expiration and can hint at where dealers and large traders expect Costar Group Inc to settle.
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.
Pin risk into expiration, dealer positioning, liquidity checks for large orders — all of it starts with knowing where CSGP open interest is concentrated. Our scanner maps Costar Group Inc's open interest across every strike and expiry, flags unusual buildups, and lets you drill into the contracts that institutional money is actually holding. Trade Costar Group Inc's options open interest as the signal it is, not as an afterthought.
| 35.00 | 0.05 | 0.15 | 0.10 | 53% | +0.0642 | 1,132 |
| 30.00 | 0.70 | 0.85 | 0.78 | 50% | +0.3474 | 860 |
| 40.00 | — | 0.45 | 0.45 | 110% | +0.1302 | 494 |
| 45.00 | — | 0.05 | 0.05 | 88% | +0.0231 | 247 |
| 50.00 | — | 0.20 | 0.20 | 131% | +0.0572 | 75 |
| 25.00 | 0.10 | 0.35 | 0.23 | 47% | -0.1294 | 2,209 |
| 35.00 | 6.20 | 7.10 | 6.65 | 10% | -1.0000 | 963 |
| 30.00 | 2.25 | 2.75 | 2.50 | 53% | -0.6443 | 850 |
| 40.00 | 11.00 | 12.70 | 11.85 | 91% | -0.9211 | 197 |
| 22.50 | — | 0.25 | 0.25 | 75% | -0.0932 | 94 |
As of September 23, 2026
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