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Compañía de Minas Buenaventura S.A.A. engages in the exploration, development, construction, and operation of mineral processing business. The company explores for gold, silver, lead, zinc, and copper metals. It operates operating mining units, including Tambomayo located in the Caylloma province, Orcopampa Unit located in the province of Castilla, Uchucchacua located in province of Oyón, Julcani located in province of Angaraes, Peru, as well as San Gabrie located in the province of General Sánchez Cerro, in the Moquegua region. The company owns interests in Colquijirca, La Zanja, Cerro Verde, El Brocal, Coimolache, Yumpaq, San Gregorio mines, and Trapiche mining unit. In addition, it produces monohydrate manganese sulphate; and operates hydroelectric power plants. Compañía de Minas Buenaventura S.A.A. was incorporated in 1953 and is based in Lima, Peru.

Ferroglobe PLC operates in the silicon and specialty metals industry in the United States, Europe, and internationally. It provides silicone chemicals that are used in a range of applications, including personal care items, construction-related products, health care products, and electronics, as well as silicon metal for primary and secondary aluminum producers; silicomanganese, which is used as deoxidizing agent in the steel manufacturing process; and ferromanganese that is used as a deoxidizing, desulphurizing, and degassing agent in the removal of nitrogen and other harmful elements from steel. The company also offers ferrosilicon products that are used to produce stainless steel, carbon steel, and various other steel alloys, as well as to manufacture electrodes and aluminum; calcium silicon, which is used in the deoxidation and desulfurization of liquid steel, and production of coatings for cast iron pipes, as well as in the welding process of powder metal and in pyrotechnics; and nodularizers and inoculants, which are used in the production of iron. In addition, it provides silica fume, a by-product of the electrometallurgical process of silicon metal and ferrosilicon. Further, the company operates quartz mines in South Africa, Spain, the United States, and Canada; and low-ash metallurgical coal mines in the United States, as well as holds interests in hydroelectric power plant in France. It serves silicone chemical, aluminum, and steel manufacturers; auto companies and their suppliers; ductile iron foundries; manufacturers of photovoltaic solar cells and computer chips; and concrete producers. The company was formerly known as VeloNewco Limited and changed its name to Ferroglobe PLC in December 2015. The company was incorporated in 2015 and is headquartered in London, the United Kingdom.

Hudbay Minerals Inc., a diversified mining company, focuses on the exploration, development, operation, and optimization of properties in North and South America. It produces copper concentrates containing gold, silver, and molybdenum; gold concentrates containing zinc; zinc concentrates; molybdenum concentrates; and silver/gold doré. The company's flagship project is the 100% owned Constancia mine located in the Province of Chumbivilcas in southern Peru. Hudbay Minerals Inc. was founded in 1927 and is based in Toronto, Canada.

Nexa Resources S.A., together with its subsidiaries, engages in the zinc mining and smelting business worldwide. The company operates in two segments, Mining and Smelting. It produces zinc, zamac, zinc oxide, and zincal, as well as by-products, such as copper, lead, silver, gold, copper sulfate, sulfuric acid, copper cementum, silver concentrate, slag aggregates, and cadmium/sponge deposits. The company owns and operates six polymetallic mines, including three located in the Central Andes of Peru; two located in the State of Minas Gerais in Brazil; and one located in the State of Mato Grosso in Brazil. It also owns and operates three zinc smelters comprising one located in Cajamarquilla in Peru; and two located in the State of Minas Gerais in Brazil, which recovers and produces metallic zinc, zinc oxide, and by-products, such as sulfuric acid. The company also exports its products. Its products are used in civil construction, transportation, energy, agriculture, health, and consumer goods industries. The company was formerly known as VM Holding S.A. and changed its name to Nexa Resources S.A. in September 2017. The company was founded in 1956 and is based in Luxembourg City, Luxembourg. Nexa Resources S.A. is a subsidiary of Votorantim S.A.