Norsk Hydro ASA engages in producing and supplying alumina and primary aluminum. It operates through the following segments: Hydro Bauxite & Alumina, Hydro Aluminium Metal, Hydro Extrusions, Hydro Energy, Hydro Metal Markets, and Other. The Hydro Bauxite & Alumina segment includes bauxite mining activities, production of alumina and related commercial activities, primarily the sale of alumina. The Hydro Aluminium Metal segment includes primary aluminium production and casting activities. The Hydro Extrusions segment delivers products within extrusion profiles, building systems and precision tubing, and is operating several recycling facilities, both integrated with its extrusion plants and separate plants. The Hydro Energy includes operating and commercial responsibility for Hydro's power stations in Norway, a trading and wholesale business in Brazil, and energy sourcing for Hydro’s world-wide operations. The Hydro Metal Markets includes all sales activities relating to products from primary metal plants and operational responsibility for stand-alone recyclers as well as physical and financial metal trading activities. The company was founded on December 2, 1905 and is headquartered in Oslo, Norway.

Saudi Arabian Oil Co. is engages in the production, transportation, and sale of energy and chemicals. It also offers prospecting, exploring, drilling, extracting, processing, manufacturing, refining and marketing hydrocarbon substances. The company operates through the following segments: Upstream, Downstream, and Corporate. The Upstream segment consists of exploring for, developing and producing crude oil, natural gas and natural gas liquids exploration, field development and production. The Downstream segment includes refining and petrochemical manufacturing, supply and trading, distribution and power generation, logistics, and marketing of crude oil and related services to international and domestic customers. The Corporate segment refers supporting services including human resources, finance and IT not allocated to Upstream and Downstream. Saudi Arabian Oil was founded on May 29, 1933 and is headquartered in Dhahran, Saudi Arabia.

PetroChina Co. Ltd. engages in the petroleum related products, services and activities. It operates through the following business segments: Exploration and Production; Refining and Chemicals; Marketing; Natural Gas and Pipeline; and Head Office and Other. The Exploration and Production segment involves exploration, development, production, and marketing of crude oil and natural gas. The Refining and Chemicals segment focuses on the refining of crude oil and petroleum products, production and marketing of primary petrochemical products, derivative petrochemical products, and other chemical products. The Marketing segment includes marketing of refined products and the trading business. The Natural Gas and Pipeline segment comprises transmission of natural gas, crude oil, and refined products and the sale of natural gas. The Head Office and Other segment relates to cash management and financing activities, the corporate center, research and development, and other business services supporting the operating business segments of the Group. The company was founded on November 5, 1999 and is headquartered in Beijing, China.

Sinopec Shengli Oilfield Construction Engineering Co. Ltd. is a Chinese company located in Dongying and ultimately controlled by the Government of China. The firm provides civil engineering services.

Petroleum Engineering Technology Research Institute of China Petroleum & Chemical Corporation Shengli Oilfield Branch, established on 2006-03-22, The business scope includes new technology in the process of oil and gas development,new technology,Research and development of new products,Product sales,Technical Services(Except where prohibited by country restrictions);Computer software development;Water Treatment Technology Research;Quality inspection of drilling and oil production special technology products;Mechanical product processing(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments).

China Petroleum Logging Co. Ltd. is a company headquartered in Beijing, China and ultimately controlled by the Government of China, that provides wellbore technical services includes logging, cable completion logging, engineering logging, perforating, testing and related services.

Kværner AS provides investment services in oil sector. The company was established in 1987 and is headquartered in Oslo, Norway

ConocoPhillips Co. explores, produces, refines, and wholesales oil and natural gas. The company is headquartered in DE.

Shell Oil Company is the United States-based wholly owned subsidiary of Royal Dutch Shell, transnational corporation "oil major" of Anglo-Dutch origins, which is amongst the largest oil companies in the world. Approximately 80,000 Shell employees are based in the U.S. The U.S. headquarters are in Houston, Texas. The current president is Bruce Culpepper, a graduate of the University of Alabama. Shell Oil Company, including its consolidated companies and its share in equity companies, is one of America's largest oil and natural gas producers, natural gas marketers, gasoline marketers and petrochemical manufacturers.

Norks Hydro ASA is a private company headquartered in Norway that produces and sells aluminium.

Shaanxi Rixin Petrochemical Co., Ltd., established on 2010-05-06, Business scope includes oil additives,refinery additives,Oilfield Drilling Auxiliary,Industrial circulating water treatment additives,cement additive,concrete admixture,Daily chemical fungicide,Water-based paint,coating,Petrochemical Raw Materials(Excluding flammable and explosive hazardous chemicals),Pharmaceutical Intermediates,Chemical Intermediates,lubricating oil,Paraffin and other petroleum products,Development of intelligent mechanical equipment,to develop,Production,processing,Sales and technical service(Does not contain flammable and explosive chemicals);Oil and Gas Engineering Technical Services(Workover,fracture),Sales and installation of sewage treatment equipment;Import and export of goods and technology(Import and Export Goods Restricted and Prohibited by the State,except technology);General Cargo Warehousing;Realtor;Space lease.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

China Petrochemical Corporation (Sinopec Group) is a super-large petroleum and petrochemical enterprise group, established in July 1998 on the basis of the former China Petrochemical Corporation. Sinopec Group is a state-owned company solely invested by the state, functioning as a state-authorized investment organization in which the state holds the controlling share. Headquartered in Beijing, Sinopec Group has a registered capital of RMB 231.6 billion. The board chairman of Sinopec Group is its legal representative. Sinopec Group executes the investor rights over related state assets owned by its full subsidiaries, controlled companies and share-holding companies. These rights include receiving returns on assets, making major decisions and appointing management teams. The Group operates, manages and supervises state assets according to related laws, and shoulders the corresponding responsibility of maintaining and increasing the value of state assets. China Petroleum and Chemical Company (Sinopec Corp.), controlled by Sinopec Group, issued H-shares and A-shares at overseas and home respectively in October 2000 and August 2001 and was listed on stock markets in Hong Kong, New York, London and Shanghai. Sinopec Group’s key business activities include: industrial investment and investment management; the exploration, production, storage and transportation (including pipeline transportation), marketing and comprehensive utilization of oil and natural gas; the production, marketing, storage and transportation of coal; oil refining; the storage, transportation ,wholesale and retail of oil products; the production, marketing, storage, transportation of petrochemicals, natural gas chemicals, coal chemicals and other chemical products; the exploration, design, consulting, construction and installation of petroleum and petrochemical engineering projects; the overhaul and maintenance of petroleum and petrochemical equipments; the research and development, manufacturing and marketing of electrical and mechanical equipments; the production and marketing of electricity, steam, water and industrial gas; the research, development, application and consulting services of technology, e-business, information and alternative energy products; the import and export of self-support and agent commodity and technology; foreign project contracting, invite bidding, labor export; the international storage and logistics business. Sinopec Group ranked the 3rd in the Fortune Global 500 in 2014.

Part of BP Plc, Atlantic Richfield Corp. is a company headquartered in the United States. The firm provides logging services.

Shangqiu Yilong Machinery Equipment Co., Ltd., established on 2011-11-18, The scope of business includes special equipment for oil refining,Garbage disposal equipment,Special equipment for rubber processing,Plastic processing special equipment processing,Sales.steel,building materials,Electric vehicles and accessories,Electric Bicycles and Accessories,Electric tricycle and accessories,Import and export business of solar water heaters and accessories, wind turbines and accessories.

Panjin Fulong Chemical Co., Ltd., established on 2001-01-12, Business scope includes licensed projects:Hazardous Chemicals Management,road freight transport(Does not contain dangerous goods)(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments,Specific business projects are subject to approval results) General project:Manufacturing of basic chemical raw materials(Manufacture of licensed chemicals free of hazardous chemicals),Chemical product production(No licensed chemical products),Manufacturing of Specialty Chemical Products(Free of Hazardous Chemicals),Manufacturing of daily chemical products,Chemical product sales(No licensed chemical products),Specialty Chemicals Sales(Free of Hazardous Chemicals),Professional cleaning,to clean,Disinfection service,Machinery and Equipment Leasing,Labor service(Does not include labor dispatch)(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)

Liaoning Hongli Energy Saving Technology Co., Ltd., established on 2022-03-17, Business scope includes general items:Manufacture of special equipment for oil drilling,Mining machinery manufacturing,Manufacturing of special equipment(Manufacture of licensed professional equipment not included),General equipment manufacturing(Does not include special equipment manufacturing),Manufacturing of photovoltaic equipment and components,Sales of building materials,Electrical Equipment Sales,Instrument sales,Auto Parts Retail,Mechanical Parts,Parts sales,Industrial automatic control system device sales,Sales of mechanical and electrical equipment,Sales of special equipment for oil drilling,electronic,Mechanical equipment maintenance(No special equipment),Technical Services,technology development,technical consulting,Technology Exchange,technology transfer,Technology Promotion,Energy saving management service,Emerging energy technology research and development,Mechanical equipment research and development,General machinery and equipment installation services,Foreign contracted projects,Machinery and Equipment Leasing,Gas Compression Machinery Sales,Gas Compression Machinery Manufacturing,Park Management Services,Oil and Gas Technical Services,property management,water pollution control,Solid Waste Treatment,Soil Pollution Control and Restoration Services,Water Environment Pollution Prevention and Control Services,Soil Environmental Pollution Prevention and Control Services,Environmental emergency management service,Ecological Restoration and Ecological Protection Services,Air Pollution Control,Atmospheric Environmental Pollution Prevention and Control Services,Manufacture of special equipment for environmental protection,Environmental protection special equipment sales,Labor service(Does not include labor dispatch)(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)

Petróleo Brasileiro SA engages in oil and gas exploration, production, and distribution activities. It operates through the following segments: Exploration and Production; Refining, Transportation, and Marketing; Gas and Power; and Corporate and Other Business. The Exploration and Production segment covers the activities of exploration, development, and production of crude oil, natural gas liquid, and natural gas, for the primary purpose of supplying its domestic refineries. The Refining, Transportation, and Marketing segment refers to refining, logistics, transport, and trading of crude oil and oil products activities as well as exports of ethanol. The Gas and Power segment represents the activities of logistic and trading of natural gas and electricity, transportation and trading of liquefied natural gas, generation and electricity by means of thermoelectric power plants, as well as holding interests in transporters and distributors of natural gas. The Corporate and Other Business segment includes corporate items related to corporate financial management, overhead related to central administration, and other expenses; and other businesses such as distribution of oil products abroad (South America) and the production of biodiesel and its co-products. The company was founded on October 3, 1953 and is headquartered in Rio de Janeiro, Brazil.