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Table of Contents 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 UNDER SECTION 13 OR 15 ( D ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-31895 ODYSSEY MARINE EXPLORATION , INC . ( Exact name of registrant as specified in its charter ) 84-1018684 ( I.R.S. Employer Identification No. ) Nevada ( State or other jurisdiction of incorporation or organization ) ( Title of each class ) Common Stock , $ .0001 par value 205 S. Hoover Blvd , Suite 210 , Tampa FL 33609 ( Address and zip code of principal executive offices ) ( 813 ) 876-1776 ( Registrant's telephone number including area code ) Securities registered pursuant Section 12 ( b ) of the Act : ( Trading symbol ) OMEX Securities registered pursuant to Section 12 ( g ) of the Act : None ( Name of each exchange on which registered ) NASDAQ Capital Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes □ No ☑ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Securities Act . Yes ☐ No ☑ Indicate by 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 and posted 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 and post such files ) . Yes ☑ No □