United Maritime (USEA) director boosts stake with 20,000-share buy

Rhea-AI Filing Summary

United Maritime Corp director Dimitrios Kostopoulos reported an open-market purchase of 20,000 shares of common stock at $2.4000 per share. After this transaction, he directly owns 320,000 shares, increasing his personal stake in the company.

Insider Trade Summary

Net Buyer: 20,000 shares ($48,000)

Net Buy 1 txn

Insider Kostopoulos Dimitrios

Role null

Bought 20,000 shs ($48K)

Type	Security	Shares	Price	Value
Purchase	Shares of Common Stock, par value $0.0001 per share	20,000	$2.40	$48K

Holdings After Transaction: Shares of Common Stock, par value $0.0001 per share — 320,000 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 20,000 shares Purchase price: $2.4000 per share Shares owned after transaction: 320,000 shares

3 metrics

Shares purchased 20,000 shares Open-market purchase on 2026-05-22

Purchase price $2.4000 per share Price for common stock transaction

Shares owned after transaction 320,000 shares Total direct holdings following purchase

Key Terms

open-market purchase, non-derivative, Form 4

3 terms

open-market purchase financial

"transaction_action: "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

non-derivative financial

"transaction_type: "non-derivative" for common stock"

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

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).

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^*

Kostopoulos Dimitrios

(Last) (First) (Middle)

154 VOULIAGMENIS AVENUE

(Street)

GLYFADA ATTICA 16674

(City) (State) (Zip)

GREECE

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/22/2026

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

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

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

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
Shares of Common Stock, par value $0.0001 per share	05/22/2026		P		20,000	A	$2.4	320,000	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:

	/s/ Dimitrios Kostopoulos	05/26/2026
	** 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 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did United Maritime Corp (USEA) report?

United Maritime Corp reported that director Dimitrios Kostopoulos bought 20,000 common shares in an open-market transaction. The filing shows a per-share price of $2.4000 and reflects a direct increase in his equity position.

At what price did the United Maritime (USEA) director buy shares?

The director purchased the shares at $2.4000 per share. This price applies to the 20,000 common shares acquired in the reported open-market transaction, as shown in the Form 4 insider trading report.

How many United Maritime (USEA) shares does Dimitrios Kostopoulos now hold?

Following the reported transaction, Dimitrios Kostopoulos directly holds 320,000 shares of United Maritime common stock. The Form 4 specifies this total share count as his ownership after completing the 20,000-share open-market purchase.

Was the United Maritime (USEA) insider trade a purchase or sale?

The reported insider trade was a purchase. The Form 4 classifies it as an open-market buy of 20,000 non-derivative common shares, coded “P” for purchase, increasing the director’s total direct holdings to 320,000 shares.

Did the United Maritime (USEA) Form 4 involve derivative securities?

No, the transaction involved only non-derivative common stock. The filing shows a single non-derivative line item labelled “Shares of Common Stock” and the derivativeSummary section is empty, indicating no options, warrants, or other derivatives were transacted.