Exxon Mobil is an American multinational oil and gas corporation. Exxon produces about 3% of the world’s oil and about 2% of the world’s energy. It specialises in the manufacturing, transportation and sale of crude oil, natural gas and petroleum products. Exxon Mobil has 23 refineries in 14 countries, and more 19,000 gas stations worldwide. The company currently employs around 75,000 people and is headquartered in Irving, Texas.