UNITED STATES SECURITIES AND EXCHANGE COMMISSION ☒ Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Washington, D.C. 20549 For the quarterly period ended March 31, 2021. FORM 10-Q or ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-31895 ODYSSEY MARINE EXPLORATION, INC. (Exact name of registrant as specified in its charter) Nevada 84-1018684 (State or other jurisdicti ...