[Form 3] EUROSEAS LTD. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

EUROSEAS LTD. chief executive officer Aristeidis J. Pittas filed an initial statement of beneficial ownership of common stock. The Form 3 lists his existing equity stake rather than any new purchase or sale.

He reports 83,537 shares held directly, including 16,500 unvested incentive stock awards. Of these awards, 5,500 shares are scheduled to vest on July 1, 2026, another 5,500 on November 13, 2026, and 5,500 on July 1, 2027.

In addition, 51,408 shares are held of record by Friends Investment Company Inc. and 1,222,358 shares are held of record by Containers Shareholders Trinity Ltd., reflecting his ownership interests in those entities. Pittas disclaims beneficial ownership of these indirectly held shares except to the extent of his pecuniary interest in them.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Pittas Aristeidis J

Role Chief Executive Officer

Type	Security	Shares	Price	Value
holding	Common stock	--	--	--
holding	Common stock	--	--	--
holding	Common stock	--	--	--

Holdings After Transaction: Common stock — 83,537 shares (Direct); Common stock — 51,408 shares (Indirect, Friends Investment Ltd.)

Footnotes (1)

1. Includes 16,500 shares of unvested incentive stock awards, of which 5,500 will vest on July 1, 2026, 5,500 shares will vest onNovember 13, 2026 and 5,500 shares will vest on July 1, 2027. Includes 51,408 shares of common stock held of record by Friends Investment Company Inc. by virtue of ownership interest in the above entities. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniaryinterest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of allthe reported shares for purposes of Section 16 or for other purposes. Includes 1,222,358 shares of common stock held of record by Containers Shareholders Trinity Ltd. by virtue of ownership interest in the above entities. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all the reported shares for purposes of Section 16 or for other purposes.

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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

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1. Name and Address of Reporting Person^*

Pittas Aristeidis J

(Last) (First) (Middle)

4 MESSOGEIOU & EVROPIS STREET

(Street)

MAROUSSI 151 24

(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
EUROSEAS LTD. [ ESEA ]

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)
	Chief Executive Officer

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)
Common stock	83,537(1)	D
Common stock	51,408(2)	I	Friends Investment Ltd.
Common stock	1,222,358(3)	I	Containers Shareholders Trinity Ltd.

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:

1. Includes 16,500 shares of unvested incentive stock awards, of which 5,500 will vest on July 1, 2026, 5,500 shares will vest onNovember 13, 2026 and 5,500 shares will vest on July 1, 2027.

2. Includes 51,408 shares of common stock held of record by Friends Investment Company Inc. by virtue of ownership interest in the above entities. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniaryinterest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of allthe reported shares for purposes of Section 16 or for other purposes.

3. Includes 1,222,358 shares of common stock held of record by Containers Shareholders Trinity Ltd. by virtue of ownership interest in the above entities. The reporting person disclaims beneficial ownership in this Form 3, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all the reported shares for purposes of Section 16 or for other purposes.

	Aristides J. Pittas	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.
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* Form 3: SEC 1473 (03-26)