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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K X ( Mark One ) Annual Report Pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 Title of each class Common Stock , par value $ 2.50 per share 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 For the transition period from to X Delaware ( State or other jurisdiction of incorporation or organization ) Commission File Number 001-03492 HALLIBURTON COMPANY ( Exact name of registrant as specified in its charter ) 3000 North Sam Houston Parkway East Houston , Texas 77032 ( Address of Principal Executive Offices ) Telephone Number - Area Code ( 281 ) 871-2699 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No 75-2677995 ( I.R.S. Employer Identification No. ) HAL Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes 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 . 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 such files ) . Yes No Large Accelerated Filer Non - accelerated Filer Name of each exchange on which registered New York Stock Exchange Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . 1 0 Accelerated Filer Emerging Growth Company Smaller Reporting Company 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 whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No The aggregate market value of Halliburton Company Common Stock held by non - affiliates on June 30 , 2020 , determined using the per share closing price on the New York Stock Exchange Composite tape of $ 12.98 on that date , was approximately $ 10.1 billion . As of January 29 , 2021 , there were 888,632,775 shares of Halliburton Company Common Stock , $ 2.50 par value per share , outstanding . Portions of the Halliburton Company Proxy Statement for our 2021 Annual Meeting of Shareholders ( File No. 001-03492 ) are incorporated by reference into Part III of this report .