ODYSSEY MARINE EXPLORATION INC

Reverse Split Mechanics

The reverse stock split was approved by Odyssey’s stockholders at Odyssey’s annual meeting of stockholders held on June 1, 2026, with the Board authorized to effect the reverse stock split, in its discretion, at a ratio ranging from 1-for-20 to 1-for-25. The final reverse stock split ratio of 1-for-25 was approved by the Board on June 15, 2026. Separately, Odyssey’s stockholders approved an increase in the number of authorized shares of common stock from 75 million to 82 million, which also will become effective on October 28, 2026.

As a result of the reverse stock split, every twenty-fivepre-split shares of Odyssey’s common stock outstanding as of the close of business on a record date of October 26, 2026, will be combined into one share of common stock. The reverse stock split is expected to reduce Odyssey’s outstanding common stock from approximately 58.6 million shares to approximately 2.3 million shares. The par value of Odyssey’s common stock will remain unchanged at $0.0001 per share.

The reverse stock split will affect all stockholders uniformly and will not change their percentage ownership in Odyssey, except for adjustments resulting from fractional shares. No fractional shares will be issued; instead, stockholders of record otherwise entitled to a fractional share will receive a cash payment, without interest or deduction, based upon the fractional amount multiplied by the closing price of Odyssey’s common stock on The Nasdaq Capital Market on the effective date of the reverse stock split.

The reverse stock split will also apply to common stock issuable upon the exercise of Odyssey’s outstanding warrants and stock options, with a proportionate adjustment to the exercise prices thereof, and under Odyssey’s equity incentive plans.

Computershare Trust Company, N.A., is acting as the exchange agent and transfer agent for the reverse stock split. Stockholders holding their shares in book-entry form or in brokerage accounts need not take any action in connection with the reverse stock split. Beneficial holders are encouraged to contact their bank, broker, or custodian with any procedural questions.