If you really put it into perspective, Oklahoma City only has two major Fortune 500 companies and that is Devon and Chesapeake, which both have expanded tremendously in recent years. In comparison, Houston is a energy sector hot bed home to the largest oil and gas companies in the U.S. Houston has the second highest number of Fortune 500 companies, only behind New York City, and a majority of those companies have some direct or indirect relation to the oil & gas industry.