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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 LIGHTBRIDGE CORPORATION ( Exact name of registrant as specified in its charter ) Nevada ( State or other jurisdiction of incorporation or organization ) OR Commission file number : 001-34487 Title of each class Common Stock , $ 0.001 par value 11710 Plaza America Drive , Suite 2000 Reston , VA 20190 ( Address of principal executive offices ) ( Zip Code ) ( 571 ) 730-1200 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : 91-1975651 Trading Symbol ( s ) Large Accelerated Filer Non - Accelerated Filer ( I.R.S. Employer Identification No. ) LTBR 风口 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 No > Name of each exchange on which registered The Nasdaq Capital Market 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 X 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 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 and post 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 . Accelerated Filer Smaller reporting company Emerging growth company ☐ ☐ X