As of February 2026 CoStar Group has a market cap of โฌ16.06 Billion. This makes CoStar Group the world's 1228th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Feb 14th, 2026 the market cap of CoStar Group was reported to be: