Gerdau. 

Gerdau SA produces steel and steel products. The company operates in civil construction, agriculture, automotive, iron ore, exports, research and development, and home steel products sectors. It offers products such as Semi-finished products (Billets, Blooms and Slabs), Special bar quality, Common Long Rolled Products, Dawn products, Merchant bar, Beams, Rebar, Piling, Iron Ore and Others. The company's geographical segment includes Brazil Segment; North America Segment; and South America Segment. It derives the majority of its revenue from the Brazil Operations segment, which includes the long, flat and special steel operations and the iron ore operation located in Brazil and joint ventures and associated companies located in Brazil.