Notice to the Market – Export Prepayment Agreement

Notice to the Market

São Paulo, May 12, 2021  Companhia Siderúrgica Nacional (“CSN” or “Company”) hereby announces to its shareholders and the market in general that CSN Mineração signed yesterday with a union of banks formed by BNP Paribas, Tokyo Branch; Citibank, N.A., Tokyo Branch; Credit Agricole Corporate and Investment Bank, Tokyo Branch; and Societe Generale Bank, Tokyo Branch a USD 350 million Export Prepayment agreement with a 12-year term. This operation has credit insurance from Nippon Export and Investment Insurance (“NEXI”) and aims to support CSN Mineração in its projects to improve and expand its Casa de Pedra mine, including its investments in the independence of dams through tailings filtration, aiming to guarantee the continuity of the supply of high quality iron ore to its long-term Japanese customers and to the market in general.

This transaction marks the beginning of the implementation of CSN Mineração’s strategy to finance its long-term growth projects using appropriate instruments.

The consummation of this transaction is conditioned to certain conditions which are usual for this type of deal.

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