United Maritime (USEA) CEO reports initial common and Series B preferred stakes

Rhea-AI Filing Summary

United Maritime Corp filed an initial insider ownership report for Director and CEO Tsantanis Stamatios. The filing shows direct holdings of 1,394,534 shares of common stock and 40,000 Series B preferred shares as of the reported date. This Form 3 records existing positions and does not show any new purchases or sales.

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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Tsantanis Stamatios

(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
X	Officer (give title below)		Other (specify below)
	Director, CEO

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	1,394,534	D
Series B Preferred Shares, par value $0.0001 per share	40,000	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/ Stamatios Tsantanis	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 insider ownership does United Maritime (USEA) CEO Tsantanis Stamatios report on this Form 3?

The Form 3 shows Tsantanis Stamatios directly holding 1,394,534 common shares and 40,000 Series B preferred shares of United Maritime. This filing establishes his initial reported ownership position as a director and CEO, without indicating any recent transactions.

Does the United Maritime (USEA) Form 3 show any insider buying or selling activity?

No, this Form 3 does not show insider buying or selling. It reports existing holdings of common and Series B preferred shares, with transaction entries classified as holdings and no share amounts recorded as purchases or sales on the transaction date.

What types of securities are reported by the United Maritime (USEA) insider on this Form 3?

The insider reports two security types: shares of common stock with a par value of $0.0001 per share, and Series B preferred shares with the same par value. Both are held directly and disclosed as part of the insider’s initial ownership statement.

How many United Maritime (USEA) preferred shares does the insider report owning?

The filing shows direct ownership of 40,000 Series B preferred shares of United Maritime. These preferred shares are reported separately from the common stock position and form part of the insider’s overall reported equity stake in the company.

What is the significance of a Form 3 filing for United Maritime (USEA) investors?

A Form 3 establishes an insider’s baseline ownership when they become a reporting person. For United Maritime, it discloses the CEO-director’s starting positions in common and Series B preferred shares, creating a reference point for any future reported insider transactions.