144 0001619958 XXXXXXXX LIVE 0000798528 ODYSSEY MARINE EXPLORATION, INC. 001-31895 205 S. HOOVER BLVD., SUITE 210 Tampa FL 33609 8138761776 JOHN D LONGLEY JR. Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

6500 18330.00 45190598 10/13/2025 NASDAQ Common 10/13/2025 Exercise of Stock Options Issuer N 6500 10/13/2025 Cash Y Sales that were executed on October 13, 2025 are being reported on this Form 144 filed on October 14, 2025 given the EDGAR system was not accepting filings on October 13, 2025 in observance of the federal holiday. 10/13/2025 05/15/2025 /s/ John D Longley