ODYSSEY MARINE EXPLORATION INC

During the second quarter of 2025, the Company was informed that Mark D. Gordon, the Company’s Chairman and Chief Executive Officer, and John D. Longley, the Company’s President and Chief Operating Officer, respectively, had each adopted a written plan for the sale of shares of the Company’s common stock. Mr. Longley’s plan also relates to sales of common stock for the account of a revocable trust of which he serves as trustee. The plans were adopted on May 15, 2025, and are intended to satisfy the conditions to the affirmative defense set forth in Rule 10b5-1(c) under the Exchange Act.

Mr. Gordon’s plan will expire on August 14, 2026, and relates to the sale of up to 200,000 shares of common stock issuable upon the settlement of restricted stock units held by Mr. Gordon. During October 2025, Mr. Gordon sold 170,956 shares of common stock.

Mr. Longley’s plan will expire on December 31, 2026, and relates to the sale of up to 256,049 shares of common stock issuable upon the exercise of vested stock options and the settlement of restricted stock units held by Mr. Longley and the revocable trust. During October 2025, Mr. Longley sold 256,049 shares of common stock.

Transactions under the plans during October 2025 have been and any future transactions under the plans will be disclosed publicly through Form 144 and Form 4 filings with the SEC to the extent required by law.

On November 17, 2025 Mr. Longley adopted a new written plan for the sale of shares of the Company’s common stock. The plan will expire on December 31, 2026 and relates to the sale of up to 147,492 shares of common stock issuable upon the settlement of restricted stock units.