Merck & Co., Inc. (MRK) vs Tesla, Inc. (TSLA)

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.

Tesla, Inc. is a vertically integrated battery electric vehicle manufacturer and developer of real-world artificial intelligence software, including autonomous driving technology and humanoid robots. Its vehicle lineup includes luxury and midsize sedans, crossover SUVs, a light truck, and a semi truck. Tesla also plans to launch a sports car and introduce a robotaxi service. In 2025, the company delivered nearly 1.64 million vehicles globally. Beyond automotive operations, Tesla sells batteries for stationary energy storage across residential, commercial, and utility applications, along with solar panels and solar roofs for power generation. The company also operates a fast-charging network and an auto insurance business.