KMX vs ZG Comparison

CarMax sells, finances, and services used and new cars through a chain of over 255 retail stores. It was formed in 1993 as a unit of Circuit City and spun off into an independent company in late 2002. Used-vehicle sales were 80% of fiscal 2026 revenue and wholesale about 17%, with the remaining portion composed of extended service plans and repair. In fiscal 2026, the company retailed and wholesaled 780,684 and 538,203 used vehicles, respectively. CarMax is the largest used-vehicle retailer in the US, but still estimates that it had only about 3.6% US market share of vehicles zero to 10 years old in calendar 2025. CarMax is based in Richmond, Virginia.

Founded in 2006, Zillow Group is a leading online real estate marketplace connecting consumers, agents, property managers, and lenders across the residential housing lifecycle. The company is composed of three core segments: residential, which monetizes home-buyer and seller traffic through a mix of upfront advertising and success-based referral fees tied to agent commissions; rentals, which serves property managers and landlords through multifamily and single-family listing syndication; and mortgages, operated through Zillow Home Loans, which originates purchase financing for consumers sourced from its platform. The company generated approximately $2.58 billion in revenue for the full year of 2025.