Companhia Siderurgica Nacional is a Brazil-based company engaged in the steel industry. The Company operates throughout the entire steel production chain, from the mining of iron ore to the production and sale of a range of steel products, including coated galvanized flat steel and tinplate. The Company operates in five segments: Steel, Mining, Cement, Logistics and Energy. The Steel segment focuses on the production, distribution and sale of flat steel, long steel, metallic containers, and galvanized steel, with operations in Brazil, the United States, Portugal, and Germany. The Mining segment encompasses the activities of iron ore and tin mining. The Cement segment is responsible for the cement production, distribution, and sale operations. The logistics segment manages port terminal for containers, as well as railway networks. The Energy segment includes generation of electric power. The Company is controlled by Vicunha Acos SA.