Companhia Siderúrgica Nacional S A : Notice to the Market - 2° Issuance of CSN Cimentos' Debentures

COMPANHIA SIDERÚRGICA NACIONAL

Publicly Held Company

Corporate Taxpayer n.º 33.042.730/0001-04

NIRE 35300396090

NOTICE TO THE MARKET

Companhia Siderúrgica Nacional ("CSN" or "Company") informs its shareholders and the market in general that its subsidiary CSN Cimentos S.A. approved, at an Extraordinary General Meeting held on August 17, 2022, the realization of its 2nd issuance of simple debentures, not convertible into shares, of the unsecured species, with additional reliable guarantee, in general series, for distribution with strict placement efforts ("Issue" and "Debentures").

The Issue will consist of 675,000 debentures, with a nominal unit value of R$1,000.00, totaling the total amount of the Issue of BRL 675,000,000.00. The Debentures will have a maturity of five years from the date of emission and thus expiring on August 26, 2027.

The Debentures shall be the subject of a public offering, with limited placement efforts, under the firm placement guarantee regime, pursuant to the Instruction of the Brazilian Securities and Exchange Commission ("CVM") No. 476, of January 16, 2009, as amended, and the other applicable legal and regulatory provisions, exclusively for professional investors, as defined in Article 11 of CVM Resolution No. 30 of May 11, 2021.

This notice to the market is exclusively informative, in accordance with the legislation and regulations in force, and shall under no circumstances be considered and/or construed as, nor constitute, an investment recommendation, an offer to sell, a solicitation or an offer to purchase any securities.

São Paulo, August 18, 2022.

Marcelo Cunha Ribeiro

Executive Director of Finance and Investor Relations