COMPANHIA SIDERÚRGICA NACIONAL

Publicly Held Company

Corporate Taxpayer's ID 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, on this date, the 1st Amendment to the Concession Agreement of Transnordestina Logística S.A. was signed, pursuant to Resolution No. 400 of 22 December 2022, of the Collegiate Board of the National Land Transport Agency - ANTT, published in the Diário Oficial da União on 12/23/2022, which aims to change the granted railroads sections of TLSA, adapt the mandatory investments, the respective deadlines for completion and penalties, define new obligations and sanctions in case of non-compliance, and establish the conditions for the return of the Salgueiro - Porto de Suape's grid ("Additive to TLSA concession agreement").

The signing of the Additive to the TLSA Concession Agreement represents an important step in the evolution of the Transnordestina Project, which has great relevance for the development and flow of production through the Northeast region of Brazil.

São Paulo, December 23, 2022.

Marcelo Cunha Ribeiro

Executive of Finance and Investor Relations

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CSN - Companhia Siderúrgica Nacional published this content on 27 December 2022 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 28 December 2022 11:19:36 UTC.