Form 4: OMEX chief executes three sales; holds 482,235 shares

Rhea-AI Filing Summary

Odyssey Marine Exploration (OMEX) reported insider transactions by CEO and Director Mark D. Gordon. A Form 4 shows three open‑market sales totaling 90,000 shares executed under a Rule 10b5‑1 trading plan adopted on May 15, 2025.

The sales occurred on 10/16/2025 (30,000 shares at a weighted average price of $3.8681), 10/17/2025 (30,000 shares at a weighted average price of $3.5), and 10/20/2025 (30,000 shares at a weighted average price of $3.5634). After these transactions, the reporting person beneficially owned 482,235 shares directly.

The filing notes that each transaction was executed in multiple trades within the stated price ranges and that full trade details are available upon request.

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).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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)
10/16/2025

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	10/16/2025		S		30,000	D	$3.8681(1)	542,235	D
Common Stock	10/17/2025		S		30,000	D	$3.5(1)	512,235	D
Common Stock	10/20/2025		S		30,000	D	$3.5634(1)	482,235	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 $3.8681 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.

	Mark D. Gordon	10/20/2025
	** 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 did OMEX disclose in this Form 4?

Three open‑market sales by CEO/Director Mark D. Gordon totaling 90,000 shares under a Rule 10b5‑1 plan.

On what dates did the OMEX insider sales occur?

Sales were reported on 10/16/2025, 10/17/2025, and 10/20/2025.

What were the reported weighted average sale prices?

Weighted averages were $3.8681 (10/16), $3.5 (10/17), and $3.5634 (10/20).

How many OMEX shares were sold on each date?

30,000 shares were sold on each of the three dates, totaling 90,000.

How many OMEX shares does the insider hold after these transactions?

The reporting person beneficially owned 482,235 shares directly after the reported transactions.

Was there a 10b5-1 plan in place for these trades?

Yes. The sales were made under a 10b5‑1 trading plan adopted on May 15, 2025.