Aker BP ASA engages in the exploration, development, and production of petroleum resources on the Norwegian Shelf. In addition, Co. has a separate Johan Sverdrup business unit to manage its interest.

BP is an integrated oil and gas group based in the United Kingdom. Co. is engaged in the exploration and production of crude oil and natural gas; refining, marketing, supply and transportation; and the manufacture and marketing of petrochemicals. Co. operates globally, with business activities in Europe, the U.S., Canada, Russia, South America, Australasia, Asia and parts of Africa. Co. operates in two business segments: Exploration and Production - including oil and natural gas exploration and development and production; and Refining and Marketing- activities include the refining, manufacturing, supply and trading, marketing and transportation of crude oil, petroleum and petrochemicals.

E.ON is an investor-owned energy company. The Generation global unit consists of all Co.'s existing (fossil and nuclear) generation assets in Europe. The Renewables unit is engaged in managing Co.'s carbonsourcing and renewables businesses. The Global Commodities unit buys and sells electricity, natural gas, liquefied natural gas, oil, coal, freight, biomass, and carbon allowances. The Exploration & Production unit is a active in the focus regions of the North Sea (U.K., Norway), Russia and North Africa. The New Build & Technology unit include Co.'s project-management and engineering operations to support the construction of new power plants and the operation of existing plants.

EDP Energias de Portugal is a utility company engaged as a generator, distributor and supplier of electricity in Portugal, and as an electricity generation company and a gas distributor in the Iberian Peninsula. In addition, Co. is a wind power operator with windfarms for energy generation in the Iberian Peninsula, the U.S., Canada, Brazil, France, Belgium, Italy, Poland and Romania and is engaged in developing wind projects in the U.K. Co. is also engaged in generating solar photovoltaic energy in Portugal, Romania and the U.S, and in Brazil it is engaged as an operator in electricity generation. As of Dec 31 2015, Co. had 9.7 million electricity customers and 1.4 million gas customers.

Endesa is engaged in the production, transmission, distribution, and supply of electricity, through hydroelectric, fossil fuel, and nuclear generation. Co. is also engaged in the mining of coal for use in its fossil-fuel electric plants; mining research; land restoration, and environmental monitoring and control.

Enel Societa Per Azioni is engaged in the generation and sale of electricity through its Generation, Energy Management and Sales Italy Division. Co. is also engaged in the distribution of electricity (Enel Distribuzione) and public and artistic lighting (Enel Sole) in Italy through its Infrastructure and Networks Division. Co.'s Iberia and Latin America Division coordinates Co.'s operations in the electricity and gas markets in Spain, Portugal and Latin America. Co.'s Engineering and Research Division manages the engineering processes related to the development and construction of power plants. Co.'s other divisions are the International Division as well as the Renewable Energy Division.

Engie is an industrial group, based in France, active in the fields of gas, electricity, energy services and the environment. Co. is an energy provider across the entire energy chain, in electricity and in natural gas, including: purchase, production and commercialization of natural gas and electricity; transport, distribution, management and development of major natural gas infrastructures; design and commercialization of energy services and environment-related services. Co.'s activities are conducted through five segments: Energy Europe, Energy International, Global Gas and LNG, Infrastructures, and Energy Services.

Eni is engaged in the oil and gas exploration and production, gas marketing operations, management of gas infrastructures, power generation, petrochemicals, oil field services and engineering industries. Co.'s operations are divided into three segments; Exploration and Production (oil and natural gas exploration and field development and production, as well as LNG operations), Gas and Power (supply, trading and marketing of gas and electricity, managing gas infrastructures for transport, distribution, storage, re-gasification, and LNG supply and marketing), and Refining and Marketing (supply of crude oil, refining and marketing of refined products). Co. maintains operations in 73 countries.

Equinor is engaged in oil and gas exploration and production activities. Co. is primarily focused on exploration, development and production of oil and gas on the Norwegian continental shelf (NCS). Co.'s operations are organized into four segments. The Development and Production Norway and Development and Production International segments explore, develop, produce and extract crude oil, natural gas and natural gas liquids. The Marketing, Processing and Renewable Energy segment markets, trades, transports and processes oil and natural gas and renewable energy. The Other segment consists of global well and project delivery, research and develpoment, and business development.

Fortum is an energy company. Co.'s operations are organised in five divisions: Hydro Power and Technology and Nuclear and Thermal Power, which are engaged in its hydro, nuclear and thermal power generation, services, portfolio management and trading as well as technology and research and development functions; Heat, Electricity Sales and Solutions, which consists of Co.'s combined heat and power production, district heating and business-to-business heating solutions, solar business, electricity sales and related customer offering; Russia, which consists of power and heat generation as well as heat distribution in Russia; and Distribution, which focuses on distribution activities in Sweden.

Galp Energia is a holding company. Through its subsidiaries, Co. operates in the following segments: exploration and production, with activities relating to exploration, development and production of hydrocarbons, particularly in Angola, Brazil and Mozambique; refining and marketing, which owns refineries in Portugal and also includes activities relating to the retail and wholesale commercialization of oil products; and gas and power, which covers the purchasing, commercialization, distribution and storage of natural gas and electric and thermal power production. As of Dec 31 2014, Co. had proved and probable reserves of 638.0 million barrels of oil equivalent.

Iberdrola is a holding company. Through its subsidiaries, Co. operates in four segments: network business, which includes all the energy transmission and distribution activities, and other regulated activity originated in Spain, the U.K., the U.S. and Brazil; deregulated business, which includes electricity generation and sales businesses as well as gas trading and storage businesses carried on by Co. in Spain, Portugal, the U.K. and North America; renewable business, with activities related to renewable energies in Spain, the U.K., the U.S. and the rest of the world; and other businesses, including the engineering and construction businesses and the non-power businesses.

Gas Natural SDG is a gas company based in Spain. Co. and its subsidiaries are primarily engaged in the supply, transportation, distribution and commercialization of piped natural gas, as well as the activities involving exploration and developing, supply, regasification, liquefaction and storage of natural gas, and the generation and commercialization of electricity. Co. operates mainly in Spain and also outside of Spain, especially in Latin America, Puerto Rico, Italy, France and Africa (through Maghreb-Europe gas pipeline and integrated LNG projects in Algeria).

Orsted is a renewable energy company based in Denmark. Co. is engaged in developing a renewables portfolio based on competences in offshore wind, bioenergy, and energy solutions. Co. is active in deploying offshore wind and converting existing coal- and gas-fired power stations to sustainable biomass, providing a heat and power supply which is both green and flexible. Co. divides its operations into four businesses: Wind Power, Bioenergy & Thermal Power, and Distribution & Customer Solutions. The Bioenergy & Thermal Power and Distribution & Customer Solutions businesses jointly constitute Co.'s Danish utility business. Co. maintains activities primarily in Northwestern Europe.

Repsol is an oil and gas company. Co. is engaged in all the activities relating to the oil and gas industry, including exploration, development and production of crude oil and natural gas, transportation of oil products, liquefied petroleum gas (LPG) and natural gas, refining, the production of a wide range of oil products and the retailing of oil products, oil derivatives, petrochemicals, LPG and natural gas, as well as the generation, transportation, distribution and supply of electricity. Co. operates in more than 40 countries. Co.'s operations are divided into four segments: Upstream, Downstream, LNG and Gas Natural Fenosa.

RWE is an electricity and gas company. The Conventional Power Generation segment consists of the activities of RWE Power, Essent and RWE npower. The Supply/Distribution Networks Germany segment supplies electricity, gas and heat. The Supply Netherlands/Belgium segment comprises the activities of Essent in the Netherlands. The Supply United Kingdom segment comprises the operations of RWE npower. The Central Eastern and South Eastern European segment contains activities in the Czech Republic, Hungary, Poland, Slovakia, Turkey and Croatia. The Renewables, Upstream Gas & Oil and Trading/Gas Midstream segments include the activities of RWE Innogy, RWE Dea and RWE Supply & Trading, respectively.

Total is an international integrated oil and gas company also active in solar and biomass energy sources. Co. engages all aspects of the petroleum industry, including Upstream operations (oil and gas exploration, development and production, and LNG (Liquefied Natural Gas)) and Downstream operations (refining, petrochemicals, specialty chemicals, marketing and marketing and trading and shipping of crude oil and petroleum products). In addition, Co. is engaged in the coal mining and power generation sectors. Co.'s worldwide operations are conducted through three business segments: Upstream, Refining & Chemicals, and Marketing & Services.

Verbund is a public utility company engaged in the generation and transmission of electricity from subsidiaries' hydro and thermal power stations located throughout Austria. Through its subsidiaries, Co. is involved in the planning and construction of water systems, hydroelectric power plants, river structures, sewage disposal systems, and high voltage transmission towers and lines. Co. generates, trades and sells electrical energy to power exchange buyers, traders, energy supply companies and industrial companies as well as households and commercial customers.