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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 : 001-34429 PAMPA ENERGÍA S.A. ( Exact name of registrant as specified in its charter ) Pampa Energy Inc .. ( Translation of registrant's name into English ) Argentina ( Jurisdiction of incorporation or organization ) Maipú 1 C1084ABA , City of Buenos Aires Argentina ( Address of principal executive offices ) María Carolina Sigwald Maipú 1 C1084ABA , City of Buenos Aires Argentina Tel .: +54 11 4344 6000 / Fax : +54 11 4344 6473 ( 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 : Common Stock Title of each class Trading Symbol Name of each exchange on which registered New York Stock Exchange * American Depositary Shares , each representing 25 shares of common stock , par value Ps.1.00 per share PAM 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 : 1,451,170,791 outstanding shares of common stock , par value Ps . 1.00 per share , excluding 4,330,464 treasury shares . Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . X Yes 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 during the preceding 12 months ( or for such shorter period that the registrant was required to submit 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 the definitions of " large accelerated filer , " " accelerated filer , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Large Accelerated Filer Non - Accelerated Filer X 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 . + 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 .