Euroseas: Aristeidis P. Pittas reports two share buys

Footnotes attribute the shares to Family United Navigation Co. and describe 25% interests and voting and disposition control for the director and his spouse.

Rhea-AI Filing Summary

Euroseas Ltd. (ESEA) director Aristeidis P. Pittas reported two purchases by Family United Navigation Co. of 525 common shares each on October 2, 2026, at $71.0721 per share. The footnotes state that Pittas and his spouse each own a 25% interest in Family United Navigation Co. and have effective control over voting and disposition of its shares. Pittas disclaims beneficial ownership except to the extent of his pecuniary interest. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Net Buyer: 1,050 shares

Net Buy 2 txns

Insider Pittas Aristeidis P

Role Director

Bought 1,050 shs ($75K)

Type	Security	Shares	Price	Value
Purchase	Common stock F1	525	$71.0721	$37K
Purchase	Common stock F2	525	$71.0721	$37K

Holdings After Transaction: Common stock — 58,950 shares (Indirect, Family United Navigation Co.)

Footnotes (2)

1. F1. The Reporting Person owns a 25% interest and has effective control over voting and disposition of the shares owned by Family United Navigation Co. The Reporting Person disclaims beneficial ownership of the securities held by Family United Navigation Co. except to the extent of such reporting person's respective pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.
2. F2. The Reporting person's spouse owns 25% interest and has effective control over voting and disposition of the shares owned by Family United Navigation Co. The Reporting Person disclaims beneficial ownership of the securities held by Family United Navigation Co. except to the extent of such reporting person's respective pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

Key Figures

Shares purchased per reported transaction: 525 shares Price per share: $71.0721 per share Aristeidis P. Pittas's interest in Family United Navigation Co.: 25% +1 more

4 metrics

Shares purchased per reported transaction 525 shares Each of two purchases by Family United Navigation Co. on October 2, 2026

Price per share $71.0721 per share Purchases reported for October 2, 2026

Aristeidis P. Pittas's interest in Family United Navigation Co. 25% Interest described in the transaction footnote

Spouse's interest in Family United Navigation Co. 25% Interest described in the transaction footnote

Key Terms

beneficial ownership, pecuniary interest, Section 16

3 terms

beneficial ownership regulatory

"disclaims beneficial ownership of the securities held by Family United Navigation Co."

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"except to the extent of such reporting person's respective pecuniary interest therein"

Section 16 regulatory

"for purposes of Section 16 or for any other purpose"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What ESEA shares did Aristeidis P. Pittas report buying?

Family United Navigation Co. was reported as making two purchases of 525 Euroseas Ltd. common shares each on October 2, 2026, at $71.0721 per share. The transactions were indirect holdings reported by director Aristeidis P. Pittas.

Who had voting control over the ESEA shares reported?

The footnotes state that Aristeidis P. Pittas and his spouse each owned a 25% interest in Family United Navigation Co. and had effective control over voting and disposition of the shares held by that entity. Pittas disclaimed beneficial ownership except to the extent of his pecuniary interest.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/05/2026 - 08:56 AM Accepted by SEC EDGAR 10/05/2026 - 08:56 AM Learn about SEC filing dates

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^*

Pittas Aristeidis P

(Last) (First) (Middle)

4 MESSOGEIOU & EVROPIS STREET

(Street)

MAROUSSI 151 24

(City) (State) (Zip)

GREECE

(Country)

2. Issuer Name and Ticker or Trading Symbol
EUROSEAS LTD. [ ESEA ]

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)
10/02/2026

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
Common stock	10/02/2026		P		525(1)	A	$71.0721	58,950	I	Family United Navigation Co.
Common stock	10/02/2026		P		525(2)	A	$71.0721	58,950	I	Family United Navigation Co.

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:

1. The Reporting Person owns a 25% interest and has effective control over voting and disposition of the shares owned by Family United Navigation Co. The Reporting Person disclaims beneficial ownership of the securities held by Family United Navigation Co. except to the extent of such reporting person's respective pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

2. The Reporting person's spouse owns 25% interest and has effective control over voting and disposition of the shares owned by Family United Navigation Co. The Reporting Person disclaims beneficial ownership of the securities held by Family United Navigation Co. except to the extent of such reporting person's respective pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

	Aristides P. Pittas	10/05/2026
	** 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)