Page 1

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Form 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 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 ( Commission File Number ) 001-32410 Celanese CELANESE CORPORATION ( Exact Name of Registrant as Specified in its Charter ) Delaware ( State or Other Jurisdiction of Incorporation or Organization ) 222 W. Las Colinas Blvd. , Suite 900N Irving , TX 75039-5421 ( Address of Principal Executive Offices and zip code ) Title of Each Class Common Stock , par value $ 0.0001 per share 1.125 % Senior Notes due 2023 1.250 % Senior Notes due 2025 2.125 % Senior Notes due 2027 ( 972 ) 443-4000 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act Trading Symbol ( s ) . ( I.R.S. Employer Identification No. ) CE CE / 23 CE / 25 CE / 27 98-0420726 Name of Each Exchange on Which Registered New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act None NO No Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes 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 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 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 . Large accelerated Filer Accelerated filer Non - accelerated filer Smaller reporting company Emerging growth company If an emerging growth company , 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 . 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 . No Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes The aggregate market value of the registrant's common stock held by non - affiliates as of June 30 , 2020 ( the last business day of the registrants ' most recently completed second fiscal quarter ) was $ 10,196,052,077 . The number of outstanding shares of the registrant's common stock , $ 0.0001 par value , as of January 28 , 2021 was 114,173,336 . DOCUMENTS INCORPORATED BY REFERENCE Certain portions of the registrant's Definitive Proxy Statement relating to the 2021 annual meeting of stockholders , to be filed with the Securities and Exchange Commission , are incorporated by reference into Part III .