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As filed with the Securities and Exchange Commission on April 12 , 2021 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 20 - F ☐ ☑ ☐ ☐☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12 ( b ) OR ( g ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 1-14732 COMPANHIA SIDERÚRGICA NACIONAL ( Exact name of registrant as specified in its charter ) NATIONAL STEEL COMPANY ( Translation of registrant's name into English ) Title of each class Common Shares without Par Value THE FEDERATIVE REPUBLIC OF BRAZIL ( Jurisdiction of incorporation or organization ) Marcelo Cunha Ribeiro , Chief Financial and Investor Relations Officer Phone : +55 11 3049-7454 Fax : +55 11 3049-7212 marcelo.ribeiro@csn.com.br Av . Brigadeiro Faria Lima , 3400 - 20th floor 04538-132 , São Paulo , SP , Brazil ( Address of principal executive offices ) Securities registered or to be registered pursuant to Section 12 ( b ) of the Act . American Depositary Shares ( as evidenced by American Depositary Receipts ) , each representing one share of Common Stock Trading symbol SID Name of each exchange on which registered NYSE NYSE * Not for trading purposes , but only in connection with the registration of American Depositary Shares pursuant to the requirements of the U.S. Securities and Exchange Commission .