List of companies in Houston

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 and it should also be noted that only New York City has more Fortune 500 companies.

* A.D. Vision * Alert Logic * Al's Formal Wear * American Bureau of Shipping * Anadarko Petroleum * Apache Corp. * Baker Botts * Baker Hughes * BJ Services * BMC Software * BMP Radio * BP America Headquarters * Bracewell & Giuliani * Burlington Resources * Cabot Oil * Cameron International * Carrabba's Italian Grill * Centerpoint Energy * Channel Dynamix * Citgo * ConocoPhillips * Consolidated Graphics * Continental Airlines * Cooper Industries * Cornell Companies * Dashiell LLC * David Weekley Homes * Diamond Offshore Drilling * Dynegy * El Paso Corporation * EOG Resources * Enbridge Energy Partners * Enron (defunct) * Enterprise Products * ExpressJet Airlines * FamilyTreeDNA * Fiesta Mart * Fit Couture * FlightAware * FMC Technologies * Frontier Oil * Fulbright & Jaworski * Gerland's * Gelb Consulting Group * Geokinetics * Gexa Energy * Group 1 Automotive * Gulf South Pipeline * Halliburton * HCC Insurance Holdings * Integrated Electrical Services * IpConfigure * KBR, Inc.

* Kelsey-Seybold Clinic * Landry's Restaurants, Inc. * Lyondell Chemical Company * Luby's * Kinder Morgan Energy * Marathon Oil * Marble Slab Creamery * MetroCorp Bancshares * Men's Wearhouse * Mexican Restaurants, Inc. * Minute Maid * National Oilwell Varco * Oceaneering International Services * Pappas Restaurants * Parker Drilling Company * Pennzoil * Pi Studios * Pioneer Companies * Plains All American Pipeline * Powell Industries * Prisma Energy International * Pro-Mark * Randall's Food Markets * Reliant Energy * Rice Epicurean Markets * Shell U.S. Oil Division * SalvageSale * Schlumberger Americas Division * Seaboard International * Service Corporation International * Shipley Do-Nuts * Simmons & Company International * Smith International * Southwestern National Bank * Spectra Energy * Stage Stores Inc. * Stewart & Stevenson * Sysco * Targa Resources * TEPPCO Partners * TimeGate Studios * Transocean * US Petrochemical Industries, Inc. * United Space Alliance * Vinson & Elkins * Walter P. Moore * Waste Management, Inc. * Weatherford International

Although Exxon Mobil has its corporate headquarters in Irving, Texas, most of their employees are in Houston. Hewlett-Packard, though its headquarters are in California, it has most of its employees in Houston at the former Compaq headquarters. Imperial Sugar's corporate offices and a regional headquarters for Unocal 76, and Schlumberger, are based in nearby Sugar Land. TimeGate Studios, a video game developer, is also based in Sugar Land. Loch Energy is based in Humble, and Anadarko Petroleum Corporation is based in nearby The Woodlands, Texas. Administaff is based in Kingwood, Texas.