Chevron Corporation (CVX) vs Merck & Co., Inc. (MRK)

Chevron Corporation is an integrated energy company engaged in worldwide oil and gas exploration, production, and refining. It is the second-largest oil company in the United States, reporting 2025 net oil-equivalent production of 3.7 million barrels per day, including 8.5 billion cubic feet of natural gas per day and 2.3 million barrels of liquids per day. The company produces energy across North America, South America, Europe, Africa, Asia, and Australia. Chevron’s refining network is concentrated in the United States and Asia, with total global refining capacity of 1.8 million barrels per day at year-end 2025. At the end of 2025, net proved reserves totaled 10.6 billion barrels of oil equivalent, including 5.7 billion barrels of liquids and 29.2 trillion cubic feet of natural gas.

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.