KMX vs POST Comparison

CarMax sells, finances, and services used and new cars through a chain of over 250 used 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 83% of fiscal 2025 revenue and wholesale about 17%, with the remaining portion composed of extended service plans and repair. In fiscal 2025, the company retailed and wholesaled 789,050 and 544,312 used vehicles, respectively. CarMax is the largest used-vehicle retailer in the US but still estimates that it had only about 3.7% US market share of vehicles 0-10 years old in calendar 2024. It seeks over 5% share. CarMax is based in Richmond, Virginia.

Post Holdings Inc. is a consumer packaged goods holding company with products sold through grocery, club, and drug stores, mass merchandisers, foodservice, food ingredient, and eCommerce. It operates through four reportable segments: Post Consumer Brands, focused on North American ready-to-eat cereal and granola, pet food, and nut butters; Weetabix, focused on U.K. ready-to-eat cereal, muesli, and protein-based shakes; Foodservice, focused on egg and potato products; and Refrigerated Retail, focused on side dish, egg, cheese, and sausage products. Products are sold across channels, including retailers, wholesalers, convenience stores, pet supply retailers, drug store customers, military and national restaurant chains, with revenues largely generated in the U.S.