Murphy is a low-price, high-volume fuel retailer that also sells convenience merchandise through a chain of retail stores.
Noble Energy is an independent oil and natural gas exploration and production company.
Apache Corporation is an independent energy company that explores, develops and produces natural gas, crude oil and natural gas liquids.
Centrica operates as an integrated energy company.
Caterpillar is a corporation which designs, manufactures, markets and sells machinery and engines and sells financial products and insurance to customers via a worldwide dealer network.
Consumers Energy owns and operates electric generation, transmission and distribution facilities, and gas transmission, storage and distribution facilities.
Praxair, a global Fortune 250 company that supplies atmospheric, process and specialty gases, is focused on 'Making our planet more productive.'
National Oilwell Varco is a company specializing in the design, manufacture and sale of equipment and components used in oil and gas drilling.
Entergy, together with its subsidiaries, engages in the production and distribution of electricity.
Baker Hughes, a GE company (BHGE) is an international industrial and oil field service company.
Concho Resources is an independent oil and natural gas company engaged in the acquisition, development and exploration of oil and natural gas properties.
Sempra Energy is a natural gas utilities holding company.