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.

Bourbon provides offshore oil and gas marine services to clients worldwide, a range of vessels and subsea services. Co. provides its clients with marine resources and equipment and offers them integrated contracts which include: the provision of IMR vessels and underwater robots operated by Co.'s personnel, as well as engineering and management services. Co. is structured around two divisions: Marine Services and Subsea Services. Marine Services provides vessels for exploration, development and production of fields in continental and deepwater offshore. Subsea Services uses Co.'s vessels in installation, inspection, maintenance and repair operations for deepwater offshore facilities.

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.

CGG is a global participant in the geophysical seismic industry. Co. manufactures geophysical equipment and provides marine, land, and airborne data acquisition services. Co. also provides geosciences services, including data imaging, seismic data characterization, geosciences and petroleum engineering consulting services, and collecting, developing and licensing geological data. Co.'s clients are in oil and gas exploration and production industies. Co. divides its activities into four segments: Equipment, Contractual Data Acquisition, Geology, Geophysics and Reservoir (GGR), and Non-Operated Resources, including eight business lines, six Corporate functions, and four Group Departments.

Energean Oil & Gas PLC is an exploration and production (E&P) company that is focused on the Eastern Mediterranean region, where it operates in offshore Israel, Greece, the Adriatic and Egypt. The Company has 13 E&P licenses, and 16 wells. The Company has proven plus probable (2P) reserves of 50 million barrels (MMbbls) of oil and 6 billion cubic feet (Bcf) of gas and 2C resources of 22.9 MMbbls of oil and 11.5 Bcf of gas at its Prinos Basin and Katakolo fields, and its associate, Energean Israel, has 2C resources of 32.8 MMbbls of liquids and 2.4 trillion cubic feet (Tcf) of gas. The Company also has exploration potential in the other licences held in offshore Israel, Western Greece, and Montenegro.

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.

Etablissements Maurel et Prom is engaged in the oil and gas industry. Co. is engaged in mainly two activities: exploration and production of oil and gas; and oil drilling. The goal of the exploration business is to discover exploitable accumulations of hydrocarbons. It includes geological and geophysical studies, acquisition and seismic processing as well as exploratory drilling. Co. operates in 12 countries and 4 continents, including Colombia, Peru, France, Italy, Congo, Tanzania, Gabon, Namibia, and Mozambique. Co. is also engaged in a project of gold exploration in Mali. As of Dec. 31 2013 Co. had close to 100,000 sq. km of exploration areas in 12 countries on 4 continents.

Euronav is a provider of maritime shipping and offshore services engaged primarily in the transportation and storage of crude oil. As of Apr. 4, 2017, Co. owned and operated a modern fleet of 55 vessels (including four chartered-in vessels) with an aggregate carrying capacity of approximately 13.7 million deadweight tons, or dwt, consisting of 31 very large crude carriers, one ultra large crude carrier, 21 Suezmax vessels, and two floating, storage and offloading vessels. Co. has two operating segments: the operation of crude oil tankers on the international markets (tankers) and the floating production, storage and offloading operations.

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.

Gaztransport & Technigaz is an engineering company specialized in membrane containment systems for liquefied gas transport and storage. Co. designs and markets technologies which combine operational efficiency and safety to equip liquefied natural gas (LNG) carriers, LNG floating platforms and multi-gas transport vessels. Co. also provides solutions for onshore storage tanks and the use of LNG as a fuel for vessels propulsion as well as a wide range of services in engineering, consultancy, training, maintenance assistance and technical studies at each stage of the liquefied gas chain.

Lundin Petroleum is an oil and gas company. Co. has a global portfolio of assets with two main areas located in Norway and South East Asia. As of Dec 31 2014, Co. held close to 70 licences in Norway, with activities across exploration, appraisal, development and production. Co. also operated within several geographical areas, including France, Netherlands, Malaysia, Indonesia, Russia, Sweden and other countries.

Petrofac is a holding company. Co. is engaged as a service provider to the oil and gas production and processing industry. Co. designs, builds, operates and maintains oil and gas facilities. Co. has three segments: Engineering & Construction, which provides engineering, procurement and construction project execution services to the onshore and offshore oil and gas industry; Engineering & Production Services, which includes engineering and production services activities to the oil and gas industry; and Integrated Energy Services, which provides an integrated service for clients, with projects that cover upstream developments project, related energy infrastructure projects, and investment.

Petroleum Geo-Services is engaged in providing geophysical services and oil and gas production services. As of Dec. 31, 2001, Co. operated six Ramform design vessels in its marine seismic data acquisition operations.

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.

Royal Dutch Shell is a holding company. Through its subsidiaries, Co. is engaged in the oil and gas industry. Co. reports its business through four segments: Integrated Gas, which engaged in the liquefaction and transportation of gas and the conversion of natural gas to liquids to provide fuels and other products; Upstream, which engaged in the exploration for and extraction of crude oil, natural gas and natural gas liquids; Downstream, which engaged in oil products and chemicals manufacturing and marketing activities; and Corporate, which comprising Co.'s holdings and treasury organisation, its self-insurance activities and its headquarters and central functions.

Saipem is a global contractor with local presence in Africa, Central Asia, America, the Middle East and South East Asia. Co. provides engineering, procurement, construction and installation services; and engineering, procurement and construction services to the oil and gas industry, both onshore and offshore, with a focus on projects, including activities in remote areas, in deep waters and on projects that involve difficult gas or crude supplies.

SBM Offshore is a holding company. Co. provides floating production solutions to the offshore energy industry, over the full product life-cycle. Co.'s main activities are the design, supply, installation, operation and life extension of floating production, storage and offloading (FPSO) vessels. Other products include semi-submersibles, tension-leg platforms, floating production storage and offloading liquefied natural gas, turret mooring systems, brownfield and offshore (off) loading terminals. As of Dec 31 2015, Co.'s fleet consisted of 10 FPSOs, two floating storage and offloadings, one mobile offshore production unit, one semisubmersible in operation worldwide.

Schoeller-Bleckmann Oilfield Equipment is engaged as a producer of high precision components and a supplier of oilfield equipment for the oilfield service industry. Co. focuses on non-magnetic drillstring components (non-magnetic drill collars) and downhole tools for drilling and completing directional and horizontal wells. The High Precision Components segment consists of the manufacturing of MWD (Measuring While Drilling) and LWD (Logging While Drilling) precision drillstring components. The Oilfield Equipment segment comprises production and distribution of non-magnetic drill collars, drilling motors and tools for downhole circulation applications, repair and maintenance services.

Subsea 7 is a provider of seabed-to-surface engineering, construction and services contractor to the offshore energy industry. Co. provides products and services required for subsea field development, including project management, design and engineering, procurement, fabrication, survey, installation, and commissioning of production facilities on the seabed and the tie-back of these facilities to fixed or floating platforms or to the shore. Co. also provides products and capabilities to deliver full Life of Field services to its clients. Through its i-Tech Division, Co. provides remotely operated vehicles and tooling services to support exploration, production and drilling activities.

TechnipFMC is global leader in oil and gas projects, technologies, systems, and services. Co. offers subsea, surface, onshore, and offshore solutions for oil and gas projects. Co. serves customers worldwide. With Co.'s technologies and production systems, integrated expertise, and comprehensive solutions, Co. is transforming Co.'s clients' project economics. Co. is uniquely positioned to deliver greater efficiency across project lifecycles from concept to project delivery and beyond. Through innovative technologies and improved efficiencies, Co.'s offering unlocks new possibilities for Co.'s clients in developing their oil and gas resources.

Tecnicas Reunidas is a general contractor company based in Spain. Co. engages in the engineering, design, and construction of industrial facilities for refining and petrochemical, oil and gas, power, and infrastructure and industries sectors worldwide. Co. constructs nuclear plants, conventional thermal plants, and renewable energy and cogeneration facilities for power sector; refineries and facilities for petrochemicals; water treatment, desalination, waste management, air, land, and marine transport facilities; and liquefaction, and storage facilities, as well as oil and gas fields and pipelines. Co. also provides engineering, management and operating services for industrial plants.

Tenaris manufactures and supplies seamless steel pipe products for the global oil and gas industry, as well as other industrial applications. Co. operates an integrated worldwide network of steel pipe manufacturing, research, finishing, and service facilities with industrial operations in the Americas, Europe, Asia, and Africa. Co. produces pipes for boilers, heat exchangers, hydraulic cylinders, automotive, structural and other industrial applications and supplies welded steel pipes for oil and gas pipelines in the South American region. Its principal products include casing, tubing, line pipe, and mechanical and structural pipes. Co.'s organizes its business around one segment: Tubes.

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.