Amazon.com, Inc. (AMZN) vs UnitedHealth Group Incorporated (UNH)

Amazon.com Inc. is a leading global e-commerce retailer and marketplace for third-party sellers. Retail-related operations account for about 74% of total revenue, followed by Amazon Web Services at 17% and advertising services at 9%. International business represents 22% of overall revenue, with Germany, the United Kingdom, and Japan serving as the company’s largest foreign markets.

UnitedHealth Group Incorporated is among the world’s largest private health insurers, providing medical benefits to roughly 51 million members globally as of December 2025, including about 1 million outside the United States. A leading provider of employer-sponsored, self-directed, and government-supported health plans, the company has built substantial scale in the medical insurance market. In addition to its core insurance operations, UnitedHealth’s Optum businesses expand its reach across healthcare services, spanning pharmacy benefits, outpatient care, and analytics for affiliated organizations and third-party clients.