Odyssey Marine CEO reports 80,956-share sale; holds 572,235 post-sale

Rhea-AI Filing Summary

Odyssey Marine Exploration (OMEX) CEO and director reported open-market sales of common stock. Between 10/13/2025 and 10/15/2025, the reporting person sold 80,956 shares in three transactions: 20,956 shares at $3.50, 30,000 shares at $3.7362, and 30,000 shares at $3.979 (weighted average prices).

The filing notes the trades were effected under a Rule 10b5-1 trading plan adopted May 15, 2025. The shares sold were originally acquired upon vesting of restricted stock units during the period 12/20/2015 through 12/13/2019. Following these sales, the reporting person beneficially owns 572,235 shares directly.

The transactions were executed in multiple trades at prices ranging from $3.50 to $4.4999 per share, with weighted averages reported for each day.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Gordon Mark

(Last) (First) (Middle)

205 S. HOOVER BLVD.

STE #210

(Street)

TAMPA FL 33609

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ODYSSEY MARINE EXPLORATION INC [ OMEX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
10/13/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/13/2025		S		20,956	D	$3.5(1)	632,235	D
Common Stock	10/14/2025		S		30,000	D	$3.7362(1)	602,235	D
Common Stock	10/15/2025		S		30,000	D	$3.979(1)	572,235	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The securities were sold under a 10b5-1 Trading Plan adopted May 15, 2025 and were acquired upon the vesting of restricted stock units during the period 12/20/2015 through 12/13/2019. This transaction was executed in multiple trades at prices ranging from $3.50 to $4.4999 per share. . The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

	/s/Susan A. Fennessey, POA Mark D. Gordon	10/15/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did OMEX report on Form 4?

The CEO/director reported open‑market sales totaling 80,956 OMEX shares across three days, with weighted average prices disclosed.

How many OMEX shares were sold and on which dates?

On 10/13/2025 sold 20,956 shares; on 10/14/2025 sold 30,000; on 10/15/2025 sold 30,000.

What were the sale prices for the OMEX insider transactions?

Weighted average prices were $3.50, $3.7362, and $3.979, with trades executed between $3.50 and $4.4999 per share.

Was the OMEX insider trading under a 10b5-1 plan?

Yes. Sales were executed under a Rule 10b5‑1 trading plan adopted May 15, 2025.

How many OMEX shares does the insider own after the sales?

Following the reported transactions, the insider beneficially owns 572,235 shares directly.

Where did the sold OMEX shares originate from?

They were acquired upon vesting of restricted stock units during 12/20/2015 through 12/13/2019.