5 Biggest Private Oil Companies in the World

4. Pemex

Annual Revenue 2021: $73.76 billion

Pemex is a state-owned Mexican petroleum company. Pemex explores and extracts hydrocarbons and oil in Mexico and other countries. The company provides storage and logistics services as well as engages in other activities such as refining, processing, imports, and exports of oil, gas, and petrochemicals. The company’s product line comprises more than 80 products.