CITGO is an American transporter, refiner and marketer of a number of different products including fuels, petrochemicals, lubricants and other such industrial products. They are Venezeulan-owned but their domestic headquarters is in the Houston, Texas-based Energy Corridor. CITGO was founded in the year 1910 in Bartlesville, Oklahoma. There are thousands of CITGO stations all across the country. More than 3,400 people are employed by CITGO. This company is one of the largest gas and oil producers in the nation and takes in a revenue of just over $32 billion every single year they are in operation.