This is an incomplete list of major companies or subsidiaries headquartered in Houston, Texas and the Houston–Sugar Land–Baytown metropolitan area. Houston is known for its oil and gas industry; Houston has the second highest number of Fortune 500 companies after New York City.[1]
Although Exxon Mobil has its corporate headquarters in Irving, Texas, most of its employees are in Houston.[9] Hewlett-Packard, maintains a large presence in Harris County, Texas. The corporate offices of Imperial Sugar and Minute Maid, a regional headquarters for Unocal 76, and an office of Schlumberger, are based in nearby Sugar Land. Anadarko Petroleum Corporation, CB&I and US Oncology are based in The Woodlands, Texas.[10]