Amazon.com, Inc. (AMZN) vs Merck & Co., Inc. (MRK)

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.

Merck & Co., Inc. develops pharmaceutical products across multiple therapeutic areas, including cardiometabolic disorders, oncology, and infectious diseases. In cancer treatment, its immuno-oncology portfolio, led by Keytruda, represents a significant driver of total revenue. The company also maintains a strong vaccines business focused on preventing pediatric illnesses, alongside Gardasil for human papillomavirus. In addition, Merck markets animal health products. Geographically, 47% of the company’s sales come from its U.S. human health segment, which includes pharmaceuticals and vaccines.