Santiago Zaldumbide Viadas

Glencore (Schweiz) AG explores and mines copper, coking coal, thermal coal, ferrochrome and vanadium. The company markets copper, coking coal, thermal coal, ferrochrome, vanadium and zinc with additional exposures to gold, lead and silver. The company exports coal and produces ferrochrome and vanadium in Australia and South African mines and smelts zinc in Spain (through subsidiary Asturiana de Zinc), mines anthracite in Swaziland, smelts zinc in Germany and harvests wood from a Chilean eucalyptus forest. The company is headquartered in Zug, Switzerland.

Petroleos del Norte SA is an oil company. It is engaged in the exploration, production, export, distribution and transportation of petroleum, gas and their derivatives. The company was founded on February 14, 1987 and is headquartered in Bogotá, Colombia.

Compañía Minera Antamina SA operates as a poly-metallic mining complex, engages in the production of copper, zinc, molybdenum, silver and other concentrates, as well as other by-products. The company was founded in 1981 and is headquartered in Santiago de Surco, Peru.

Glencore Canada Corp. engages in producing and marketing of commodities. Its assets include nickel, copper, coal and zinc mining operations and projects, agricultural facilities, and a consulting business. The company was founded in 1974 and is headquartered in Toronto, Canada.

Union Explosivos Rio Tinto SA is a private company based in Madrid, Spain.

Part of Repsol SA, Petróleos del Norte SA (Spain) is a Spanish sustainable energy company founded in 1968. The company is based in Muskiz, Spain. Petronor's program of open innovation, inspire®, seeks solutions to the challenges faced by the company. Petronor's refinery produces a range of products including biodiesel, butane, propane, naphtha, fuel oils, asphalts, and diesel. The company's website provides information about its facilities and surroundings in Muskiz, Abanto-Zierbena, and Zierbena. Additionally, the website features reports on the natural species found in the vicinity of the Petronor refinery, as well as information on the best of Basque cuisine, presented by renowned Basque chefs with Repsol suns.

The International Zinc Association operates a business association for zinc producers. The non-profit company is based in Washington.

Barcelo International Hotel & Travel Group operates hotels. The private company is based in Palma de Mallorca, Spain.