Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F. Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No ___X____

Companhia Siderúrgica Nacional (“CSN” or "Company") (B3: CSNA3) in conformity with the provisions of the Instruction No. 358/2002 of the Comissão de Valores Mobiliários (“CVM”) hereby announces to its shareholders and the market in general, as approved during a Meeting of the Company's Board of Directors (“RCA”), held on June 21, 2021, the Share Buyback Program ("Share Buyback Program") for the acquisition of 24,154,500 (twenty-four million, one hundred and fifty-four thousand and five hundred) common shares issued by the Company from June 22, 2021 to December 21, 2021. The Share Buyback Program will be executed as described in Annex I from RCA.

The Share Buyback Program aims to acquire common shares, nominative shares, book-entry shares and shares without nominal value issued by the Company itself. Respecting the legal limits and based on available resources, for permanence in treasury and subsequent disposal or cancellation, pursuant to the provisions of Article 3 of CVM Instruction No. 567/2015.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

COMPANHIA SIDERÚRGICA NACIONAL

By:	/S/ Benjamin Steinbruch
	Benjamin Steinbruch Chief Executive Officer



By:	/S/ Marcelo Cunha Ribeiro
	Marcelo Cunha Ribeiro Chief Financial and Investor Relations Officer

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates of future economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.