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Table of Contents ☑ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , DC 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- 39000 Vista Oil & Gas , S.A.B. de C.V. ( Exact name of registrant as specified in its charter ) N.A. ( Translation of registrant's name into English ) United Mexican States ( Jurisdiction of incorporation or organization ) Calle Volcán 150 , Floor 5 Colonia Lomas de Chapultepec , Alcaldía Miguel Hidalgo Mexico City , 11000 Mexico ( Address of principal executive offices ) Alejandro Cherñacov Calle Volcán 150 , Floor 5 Colonia Lomas de Chapultepec , Alcaldía Miguel Hidalgo Mexico City , 11000 Mexico Tel .: +52 ( 55 ) 4166-9000 ( 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 Series A Shares American Depositary Shares , each representing 1 Series A share , with no par value Trading Symbol VISTA VIST Name of each exchange on which registered New York Stock Exchange * New York Stock Exchange Not for trading , but only in connection with the registration of American Depositary Shares , pursuant to the requirements of the Securities and Exchange Commission . 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 Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the annual report : 87,851,286 outstanding Series A shares , with no par value . 2 outstanding Series C shares , with no par value .