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As filed with the Securities and Exchange Commission on March 22 , 2021 . UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Form 20 - F ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended : December 31 , 2020 Commission file number : 001-38256 NEXA RESOURCES S.A. ( Exact name of Registrant as specified in its charter ) Grand Duchy of Luxembourg ( Jurisdiction of incorporation or organization ) Rodrigo Menck Senior Vice President Finance and Group Chief Financial Officer Phone : +352 28 26 37 27 37A , Avenue J.F. Kennedy L - 1855 , Luxembourg Grand Duchy of Luxembourg ( Address of principal executive offices ) Securities registered or to be registered pursuant to Section 12 ( b ) of the Act : Title of Each Class Common shares , each with par value of US $ 1.00 Trading Symbol NEXA Name of Each Exchange on Which Registered New York Stock Exchange Securities registered or to be registered pursuant to Section 12 ( g ) of the Act : None Securities for which there is a reporting obligation pursuant to Section 15 ( d ) of the Act : None The number of outstanding shares of each class of stock of Nexa Resources S.A. as of December 31 , 2020 was : 132,438,611 common shares , each with par value of US $ 1.00 Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes " No þ If this report is an annual or transition report , indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 . Yes " No þ Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes þ No¨ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes þ No " Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer or an emerging growth company . See definition of " accelerated filer , " " large accelerated filer ” and “ emerging growth company ” in Rule 12b - 2 of the Exchange Act . ( Check one ) : Large accelerated filer Accelerated filer þ Non - accelerated filer - Emerging growth company " If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards + provided pursuant to Section 13 ( a ) of the Exchange Act .