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Técnicas Reunidas S.A. is an engineering and construction company headquartered in Madrid, Spain. Specializing in the energy sector, its primary focus is on the design and management of industrial facilities. The company offers a range of services, including the development of oil and gas production and processing facilities, petrochemical and power plants, and renewable energy projects. Founded in 1959, Técnicas Reunidas operates globally, undertaking projects across Europe, the Middle East, Asia, and Latin America. Its strategic positioning is underscored by its technical expertise in handling complex engineering tasks and its capability to execute large-scale projects in diverse environments.

Shell is an integrated oil and gas company that explores for, produces, and refines oil around the world. In 2025, it produced 1.5 million barrels of liquids and 7.3 billion cubic feet of natural gas per day. At end-2025, reserves stood at 8.1 billion barrels of oil equivalent, 44% of which consisted of liquids. Its production and reserves are in Europe, Asia, Oceania, Africa, and North and South America. The company operates refineries with a capacity of 1.4 mmb/d located in the Americas, Asia, and Europe, and sells about 9 million tons per year of chemicals. Its largest chemical plants, often integrated with its local refineries, are in NorthWestern Europe, China, and North America.