EOG Resources Inc. is an American diversified energy company founded in 1985 and headquartered in Houston, Texas. It specializes in the exploration, development, production and marketing of crude oil and natural gas. The company has been ranked in the top 200 on the Fortune 500 list of top American companies. The company separated from Enron Oil & Gas Company before further separation from Enron in 1999. It has operations in the US, Trinidad, as well as other International segments.