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Antamina is a polymetallic mining complex that produces copper, zinc and molybdenum concentrates, and silver and lead concentrates as by products. The mine is located in the district of San Marcos, Ancash Region, 200 km. from the city of Huaraz at an average altitude of 4,300 meters above sea level. The company has its own port, called Punta Lobitos located in the coastal province of Huarmey. Investment in Antamina (an initial investment of approximately U.S. $ 2.3 billion, plus U.S. $ 1.2 billion of investment in the expansion of its operations) is considered the highest in the history of Peruvian mining. Today it is among the largest Peruvian producers of copper and zinc concentrates and one of the ten largest mines in the world in terms of operating volume. Compania Minera Antamina SA is a company incorporated under Peruvian law, the product of a joint venture between four leading companies in the world mining industry. Antamina's shareholders are: • BHP Billiton (33.75%) • Xstrata (33.75%) • Teck (22.5%) • Mitsubishi Corporation (10%)

We are Nexa, one of the world's biggest global zinc mining companies. We operate in Brazil and Peru, with teams in Luxembourg and the US, and supply customers on every continent. We have been operating mining and metallurgy assets for over 65 years, and our shares are currently traded on the New York Stock Exchange under the symbol that is exactly our name: NEXA. Our purpose is to integrate mining into an ever-changing world as an opportunity for sustainable development. Caring for people is also part of our approach to mining. That is why we invite you to protect your safety and trust only the information published on our official channels. This is how we guarantee transparent, safe processes and real opportunities for everyone.

Ferreyros es la empresa líder en la comercialización de bienes de capital en el país y en la provisión de servicios en este ámbito. Integrante de la corporación Ferreycorp, junto con otras empresa; es distribuidora de Caterpillar desde 1942, así como de otras prestigiosas marcas, entre las que se incluyen Metso, Astec, Paus, Massey Fergusson (Agco), Challenger, Montana, Zaccaria, Tatu Marchesan , Civemasa, Menta Mit, Nogueira, Weber, Mendes, Benecke, SCM Group, Jumil, etc. http://www.ferreycorp.com.pe/ http://www.ferreyros.com.pe/es/ Ferreyros S.A. 20100028698