United Maritime Corp (USEA) director discloses holding 300,000 common shares on Form 3

Rhea-AI Filing Summary

United Maritime Corp director Kostopoulos Dimitrios filed an initial ownership report showing direct holdings of 300,000 shares of common stock. This Form 3 does not reflect a new buy or sell transaction; it simply establishes his existing equity position in the company.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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1. Name and Address of Reporting Person^*

Kostopoulos Dimitrios

(Last) (First) (Middle)

154 VOULIAGMENIS AVENUE

(Street)

GLYFADA 16674

(City) (State) (Zip)

GREECE

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
United Maritime Corp [ USEA ]

3a. Foreign Trading Symbol

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

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

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

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Shares of Common Stock, par value $0.0001 per share	300,000	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Dimitrios Kostopoulos	03/18/2026
	** 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 5 (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.
* Form 3: SEC 1473 (03-26)

FAQ

What does the United Maritime Corp (USEA) Form 3 filing show?

The Form 3 shows director Kostopoulos Dimitrios reporting beneficial ownership of 300,000 United Maritime Corp common shares. This is an initial ownership statement, not evidence of a recent trade or change in his economic exposure.

Did Kostopoulos Dimitrios buy or sell USEA shares in this Form 3?

No recent buy or sell is indicated. The Form 3 records existing direct ownership of 300,000 common shares. It serves as a baseline disclosure when someone becomes an insider, rather than documenting a new market transaction.

How many United Maritime Corp shares does the director report owning?

The director reports 300,000 shares of United Maritime Corp common stock held directly. This figure represents his total beneficial ownership reported in the filing and provides a reference point for any future insider trading disclosures.

Is this USEA Form 3 filing considered positive or negative for investors?

The filing is generally neutral. It is an administrative disclosure of an insider’s existing holdings, not a new purchase, sale, or strategic event. Its main purpose is to improve transparency around insider equity ownership levels.

What role does the reporting person in this USEA Form 3 hold?

The reporting person, Kostopoulos Dimitrios, is identified as a director of United Maritime Corp. Directors are required to disclose their equity stakes through Form 3 when they become insiders, helping investors understand board members’ ownership alignment.

Are the 300,000 USEA shares held directly or indirectly?

The 300,000 United Maritime Corp shares are reported as held directly by the director. The filing does not list any indirect holdings through trusts, partnerships, or other entities, simplifying interpretation of his disclosed ownership position.