Form SCHEDULE 13D/A United Maritime Corp Filed by: Tsantanis Stamatios
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 3)*
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United Maritime Corp (Name of Issuer) |
Common Stock, par value $0.0001 per share (Title of Class of Securities) |
(CUSIP Number) |
Stamatios Tsantanis 154 Vouliagmenis Avenue, Glyfada, J3, 166 74 0030 213 01 81 507 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) |
03/09/2026 (Date of Event Which Requires Filing of This Statement) |
If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.
The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the
Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).
SCHEDULE 13D
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| CUSIP No. |
| 1 |
Name of reporting person
Tsantanis Stamatios | ||||||||
| 2 | Check the appropriate box if a member of a Group (See Instructions)
(a)
(b) | ||||||||
| 3 | SEC use only | ||||||||
| 4 |
Source of funds (See Instructions)
OO | ||||||||
| 5 |
Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)
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| 6 | Citizenship or place of organization
GREECE
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| Number of Shares Beneficially Owned by Each Reporting Person With: |
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| 11 | Aggregate amount beneficially owned by each reporting person
1,394,534.00 | ||||||||
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)
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| 13 | Percent of class represented by amount in Row (11)
14.62 % | ||||||||
| 14 | Type of Reporting Person (See Instructions)
IN |
SCHEDULE 13D
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| Item 1. | Security and Issuer | |
| (a) | Title of Class of Securities:
Common Stock, par value $0.0001 per share | |
| (b) | Name of Issuer:
United Maritime Corp | |
| (c) | Address of Issuer's Principal Executive Offices:
154 Vouliagmenis Avenue, Glyfada,
GREECE
, 166 74. | |
Item 1 Comment:
Explanatory Note: This Amendment No. 3 to Schedule 13D (this "Amendment No. 3") amends and supplements the Schedule 13D originally filed with the U.S. Securities and Exchange Commission (the "Commission") on January 6, 2023, as amended and supplemented by Amendment No. 1 to Schedule 13D filed with the Commission on November 26, 2024 and Amendment No. 2 to Schedule 13D filed with the Commission on April 10, 2025 ("Amendment No. 2", and as further amended and supplemented by this Amendment No. 3, the "Schedule 13D") by the Reporting Person (as defined in Item 2), to reflect an increase in the beneficial ownership of the Reporting Person of Common Stock (as defined in Item 1). | ||
| Item 2. | Identity and Background | |
| (d) | The Reporting Person has not been convicted in a criminal proceeding during the last five years. | |
| (e) | During the last five years, the Reporting Person has not been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
Except as set forth in this Amendment No. 3, there are no material changes to this Item 2 from Amendment No. 2. | |
| Item 3. | Source and Amount of Funds or Other Consideration | |
The information set forth in Item 6 is incorporated herein by reference.
Except as set forth in this Amendment No. 3, there are no material changes to this Item 3 from Amendment No. 2. | ||
| Item 5. | Interest in Securities of the Issuer | |
| (a) | Aggregate number and percentage of class beneficially owned: 1,394,534 shares, or approximately 14.62% of the class, based on 9,538,139 shares of Common Stock outstanding as of April 7, 2026, based on information received from the Issuer. | |
| (b) | The Reporting Person has the sole voting and investment power with respect to the Common Stock. | |
| (c) | The information set forth in Item 3 above is hereby incorporated herein by reference.
Except as described herein, no transactions in the Common Stock have been effected by the Reporting Person during the past 60 days. | |
| (d) | No other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, any of the shares of Common Stock beneficially owned by the Reporting Person. | |
| (e) | Not applicable. | |
| Item 6. | Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer | |
The first paragraph of Item 6 is hereby amended and restated in its entirety to read as follows:
As described herein, the Reporting Person in his capacity as an executive officer of the Issuer, has been, and is expected in the future to be, granted shares of Common Stock in accordance with the Issuer's 2022 Equity Incentive Plan, as amended. On March 9, 2026, 200,000 shares of Common Stock were issued pursuant to the Issuer's 2022 Equity Incentive Plan, as amended, to the Reporting Person. These shares of Common Stock are subject to vesting provisions, as follows: 60,000 shares of Common Stock will vest on September 9, 2026, 60,000 shares of Common Stock will vest on April 9, 2027 and 40,000 shares of Common Stock will vest on September 9, 2027.
Except as set forth in this Amendment No. 3, there are no material changes to this Item 6 from Amendment No. 2. | ||
| SIGNATURE | |
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
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