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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 Delaware FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 ( State of incorporation ) Centrus Fueling the Future of Nuclear Power For the fiscal year ended December 31 , 2020 Commission file number 1-14287 Centrus Energy Corp. Title of each class Class A Common Stock , par value $ 0.10 per share 52-2107911 ( IRS Employer Identification No. ) 6901 Rockledge Drive , Suite 800 , Bethesda , Maryland 20817 ( 301 ) 564-3200 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol Name of each exchange on which registered NYSE American LEU Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes o No 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 o 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 o 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 o 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 . O 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 . O Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No ý The aggregate market value of Common Stock held by non - affiliates computed by reference to the price at which the Common Stock was last sold as reported on the New York Stock Exchange as of June 30 , 2020 , was $ 64.5 million . As of March 1 , 2021 , there were 12,660,676 shares of the registrant's Class A Common Stock , par value $ 0.10 per share , and 719,200 shares of the registrant's Class B Common Stock , par value $ 0.10 per share , outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of the definitive proxy statement for the 2021 annual meeting of shareholders to be filed with the Securities and Exchange commission within 120 days after the end of fiscal year 2020 are incorporated by reference into Part III of this Annual Report on Form 10 - K .