ExxonMobil Corporation is an industry leader in almost every aspect of the energy and petrochemical businesses. The company was formed by the combination of the Exxon and Mobil organizations. It conducts oil and gas exploration and development in various major accessible producing areas in the world. ExxonMobil has one of the largest energy resource bases of any non-government company. It is among the world s largest non-government natural gas marketers and reserves holders. The company is also among the world s largest fuel refiners and manufacturers of lube basestocks used for making motor oils. Its brand names include Exxon, Mobil and Esso. The company has refining operations in more than 25 countries, 42,000 retail services stations in more than 100 countries and lubricants marketing in nearly 200 countries and territories. ExxonMobil Corporation maintains a location in Billings, Mont.