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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 : 001-36671 Atento S.A. ( Exact name of Registrant as specified in its charter ) Atento S.A. ( Translation of Registrant's name into English ) Grand Duchy of Luxembourg ( Jurisdiction of incorporation or organization ) 1 , rue Hildegard Von Bingen , L - 1282 , Luxembourg Grand Duchy of Luxembourg ( Address of principal executive offices ) Jose Antonio de Souza Azevedo , Chief Financial Officer Address : Rua Paul Valery , 255 , 4º andar , Chácara Santo Antonio , 04719-050 , São Paulo , Brazil Telephone No .: +55 ( 11 ) 3779-0881 e - mail : investor.relations@atento.com ( Name , Telephone , E - mail and / or Facsimile number and Address of Company Contact Person ) Securities registered or to be registered pursuant to Section 12 ( b ) of the Act . Title of each class Ordinary Shares , no par value Trading Symbol ( s ) ATTO Securities registered or to be registered pursuant to Section 12 ( g ) of the Act : None ( Title of Class ) Name of each exchange on which registered New York Stock Exchange Securities for which there is a reporting obligation pursuant to Section 15 ( d ) of the Act : None ( Title of Class ) Indicate the number of outstanding shares of each of the issuer's classes of capital stock or common stock as of the close of the period covered by the annual report . 15,000,000 ordinary shares Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . [ ] Yes [ X ] No 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 [ X ] No 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 . [ X ] Yes [ 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 and such files ) . [ X ] Yes 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 and large accelerated filer " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Large accelerated filer ( Accelerated filer [ X ] Non - accelerated filer [ ] ) Emerging growth copany ( ) 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 . † The term " new or revised financial accounting standard " refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5 , 2012 . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . [ X ] Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing :