Top 20 Electricity, Oil & Gas Companies in the US
Houston , Texas , United States (Map)
95000 EmployeesSchlumberger Limited
Schlumberger is the world's leading supplier of technology, integrated project management and information solutions to customers working in the oil and gas industry worldwide. Employing approximately 93,000 people representing over 140 nationalities and working in more than 85 countries, Schlumberger provides the industry's widest range of products... more
Houston , Texas , United States (Map)
93000 EmployeesShell Oil Company
Shell is a global group of energy and petrochemical companies. With around 102,000 employees in more than 100 countries and territories, Shell helps to meet the world's growing demand for energy in economically, environmentally and socially responsible ways.
Irving , Texas , United States (Map)
73500 EmployeesExxon Mobil Corporation
ExxonMobil, the largest publicly traded international oil and gas company, uses technology and innovation to help meet the world's growing energy needs. ExxonMobil holds an industry-leading inventory of resources, is the largest refiner and marketer of petroleum products, and its chemical company is one of the largest in the world.
Houston , Texas , United States (Map)
65000 EmployeesHalliburton Company
Founded in 1919, Halliburton is one of the world's largest providers of products and services to the energy industry. With approximately 50,000 employees, representing 140 nationalities and operations in approximately 70 countries, the company serves the upstream oil and gas industry throughout the lifecycle of the reservoir - from locating hydroca... more
San Ramon , California , United States (Map)
61500 EmployeesChevron Corporation
Chevron Corporation is one of the world's leading integrated energy companies. Through its subsidiaries that conduct business worldwide, the company is involved in virtually every facet of the energy industry. Chevron explores for, produces and transports crude oil and natural gas; refines, markets and distributes transportation fuels and lubricant... more
New York , New York , United States (Map)
57437 EmployeesIcahn Enterprises L.P.
Icahn Enterprises L.P. (NASDAQ: IEP), a master limited partnership, is a diversified holding company engaged in ten primary business segments: Investment, Automotive, Energy, Metals, Railcar, Gaming, Mining, Food Packaging, Real Estate and Home Fashion.
Findlay , Ohio , United States (Map)
45440 EmployeesMarathon Petroleum Corporation
Headquartered in Findlay, Ohio, Marathon Petroleum Corporation (MPC), together with its subsidiaries, including Marathon Petroleum Company LP, Speedway LLC and MPLX LP, is one of the largest petroleum product refiners, marketers and transporters in the United States. MPC is the nation’s fourth-largest refiner and the largest refiner in the Midwest... more
Houston , Texas , United States (Map)
44326 EmployeesNational Oilwell Varco Inc
National Oilwell Varco (NYSE: NOV) is a worldwide leader in the design, manufacture and sale of equipment and components used in oil and gas drilling and production operations and in the provision of oilfield services to the upstream oil and gas industry.
Houston , Texas , United States (Map)
43000 EmployeesBaker Hughes Inc.
As a service to our shareholders, Baker Hughes is pleased to provide a link to the NetBasis Cost Basis system. For a nominal fee, you may use NetBasis to calculate the cost basis for your Baker Hughes common stock, adjusted for any corporate actions or dividend reinvestments. To use NetBasis, you will need your purchase/acquisition/sale dates and t... more
Houston , Texas , United States (Map)
39500 EmployeesWeatherford International Ltd
Weatherford is one of the largest multinational oilfield service companies providing innovative solutions, technology and services to the oil and gas industry. The Company operates in over 100 countries and has a network of approximately 1,000 locations, including manufacturing, service, research and development, and training facilities and employs... more
The Woodlands , Texas , United States (Map)
31000 EmployeesEncompass Services Corporation
ENCOMPASS is a leading solution consulting firm specializing in data storage, virtualization, business continuity, disaster recovery, and performance tuning of your SAN infrastructure. Our staff is made up of engineers and consultants that have an extensive background in SAN and Network Consulting and have formerly been employed with some of the to... more
Houston , Texas , United States (Map)
30360 EmployeesMarathon Oil Corporation
Marathon Oil Corporation is an international energy company engaged in exploration and production, oil sands mining and integrated gas. At the end of 2010, Marathon Oil had net proved reserves of more than 1.6 billion barrels. Based in Houston, Texas, the Company has proved reserves in North America, the North Sea and Africa.
Dallas , Texas , United States (Map)
30078 EmployeesEnergy Transfer Partners, L.P.
Energy Transfer Partners, L.P. (NYSE: ETP) is a master limited partnership that owns and operates one of the largest and most diversified portfolios of energy assets in the United States. ETP's subsidiaries include Panhandle Eastern Pipe Line Company, LP (the successor of Southern Union Company) and Lone Star NGL LLC, which owns and operates natura... more
Chicago , Illinois , United States (Map)
29762 EmployeesExelon Corporation
Exelon Corporation (NYSE: EXC) is a Fortune 100 energy company with the largest number of utility customers in the U.S. Exelon does business in 48 states, the District of Columbia and Canada and had 2015 revenue of $34.5 billion. Exelon's six utilities deliver electricity and natural gas to approximately 10 million customers in Delaware, the Distri... more
Charlotte , North Carolina , United States (Map)
29188 EmployeesDuke Energy Corp.
Duke Energy is the largest electric power holding company in the United States. Its regulated utility operations serve approximately 7.3 million electric customers located in six states in the Southeast and Midwest, representing a population of approximately 23 million people. It's Commercial Portfolio and International business segments own and op... more
Norwalk , Connecticut , United States (Map)
29000 EmployeesEMCOR Group , Inc.
A Fortune 500 company with estimated 2016 revenues of ~$7.4B, EMCOR Group, Inc. (NYSE: EME) is a leader in mechanical and electrical construction, industrial and energy infrastructure, and building services. A provider of critical infrastructure systems, EMCOR gives life to new structures and sustains life in existing ones by its planning, installi... more
Atlanta , Georgia , United States (Map)
26703 EmployeesSouthern Company
Southern Company (NYSE: SO) is America's premier energy company, with 44,000 megawatts of generating capacity and 1,500 billion cubic feet of combined natural gas consumption and throughput volume serving 9 million electric and gas utility customers through its subsidiaries. The company provides clean, safe, reliable and affordable energy through e... more
Houston , Texas , United States (Map)
24500 EmployeesQuanta Services , Inc.
Quanta Services is a leading specialized contracting services company, delivering infrastructure solutions for the electric power and oil and gas industries. Quanta's comprehensive services include designing, installing, repairing and maintaining energy infrastructure. With operations throughout the United States, Canada and Australia and in select... more
San Francisco , California , United States (Map)
23000 EmployeesPacific Gas And Electric Company
Pacific Gas and Electric Company, a subsidiary of PG&E Corporation (NYSE:PCG), is one of the largest combined natural gas and electric utilities in the United States. Based in San Francisco, with more than 20,000 employees, the company delivers some of the nation's cleanest energy to nearly 16 million people in Northern and Central California.
Houston , Texas , United States (Map)
23000 EmployeesCameron
Cameron is a leading provider of flow equipment products, systems and services to worldwide oil, gas and process industries. Leveraging its global manufacturing, engineering and sales and service network, Cameron works with drilling contractors, oil & gas producers, pipeline operators, refiners and other process owners to control, direct, adjust, p... more

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