Carvana Co. is a leading e-commerce platform in the United States for purchasing and selling pre-owned vehicles. With a low risk ESG score of 16.1, the company generates revenue from various sources including used vehicle sales, wholesale vehicle sales, and other transactions like loan sales and VSC commissions. The core of their business lies in retail vehicle unit sales which contribute the most to their revenue, allowing them to explore additional revenue streams like financing, auto insurance, and trade-in vehicles.