Marathon Oil Corporation is a United States-based natural gas and petroleum production and exploration company based in Houston, Texas. Their reserves consist of petroleum, synthetic crude, natural gas and natural gas liquids with 2.163 barrels of oil equivalent, selling 438 thousand barrels of it a day. There are approximately 5,600 Marathon locations in 19 states. Marathon began as the Ohio Oil Company in 1887, and in 1930, the Ohio Oil Company bought the Transcontinental Oil Company to establish the brand name Marathon. In 1962, the company finally settled on Marathon Oil Company as it is named today.