Filing Details

Euroseas Ltd.

(Name of Issuer)

Common Shares, $0.03 par value

(Title of Class of Securities)

Y23592135

(CUSIP Number)

Friends Investment Company Inc. 4 Messogiou & Evropis St. 151 24 Maroussi Greece

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

May 10, 2021

(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 which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), Rule 13d-1(f) or Rule 13d-1(g), check the following box [X].

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).

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

CUSIP No.

Y23592135

1.	NAME OF REPORTING PERSONS
	I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
	Preferred Friends Investment Company Inc.

2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
		(a)	[_]
		(b)	[_]

3.	SEC USE ONLY

4.	SOURCE OF FUNDS*
	WC

5.	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)		[_]

6.	CITIZENSHIP OR PLACE OF ORGANIZATION
	Republic of the Marshall Islands

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

7.	SOLE VOTING POWER
	99,725

8.	SHARED VOTING POWER
	0

9.	SOLE DISPOSITIVE POWER
	99,725

10.	SHARED DISPOSITIVE POWER		[_]
	0

11.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
	PERSON
	99,725

12.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
	CERTAIN SHARES*
			[_]

13.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	1.4%

14.	TYPE OF REPORTING PERSON*
	CO

CUSIP NO. Y23592135

The class of equity security to which this statement relates is the Common Shares, $0.03 par value (the "Common Shares"), of Euroseas Ltd., a Marshall Islands corporation (the "Issuer").  The address of the principal executive office of the Issuer is 4 Messogiou & Evropis St., 151 24 Maroussi, Greece.

The address of the principal place of business of Family United Navigation is Trust Company Complex, Ajeltake Road, Ajeltake Islands, Majuro MH96960, Marshall Islands.

(b),(c)

The principal business of the Reporting Persons is acting as shipping investment holding companies.

The name, citizenship, present principal occupation or employment and business address of each executive officer and director of Friends Investment Company is set forth below.  The business address of each director and executive officer is 4 Messogiou & Evropis St., 151 24 Maroussi, Greece.

Aristides P. Pittas		President, Director		Mr. Pittas is a citizen of Greece.  His principal occupation is serving as Vice Chairman of the Issuer.
Nikolaos J. Pittas		Vice President/Director		Mr. Pittas is a citizen of Greece.  His principal occupation is serving as the financial manager of Eurobulk Ltd.
Stephania J. Karmiri		Treasurer/Secretary/Director		Ms. Karmiri is a citizen of Greece.  Her principal occupation is serving as the corporate secretary and administration manager of Eurobulk Ltd.

The name, citizenship, present principal occupation or employment and business address of each executive officer and director of Family United Navigation is set forth below.  If no business address is given, the director's or executive officer's address is 4 Messogiou & Evropis St., 151 24 Maroussi, Greece.

The source of funds for the purchases of the 490,345 Common Shares directly owned by Friends Investment Company came from its working capital.  No borrowed funds were used to purchase the Common Shares, other than any borrowed funds used for working capital purposes in the ordinary course of business.

Pursuant to a Purchase Agreement with the Issuer, dated as of January 27, 2014 (the “Purchae Agreement”), Preferred Friends Investment Company acquired beneficial ownership of 5,700 Series B Convertible Perpetual Preferred Shares of the Issuer at the closing of the transaction on January 29, 2014.  Preferred Friends Investment Company acquired direct ownership of the Common Shares upon conversion of Series B Convertible Perpetual Preferred Shares of the Issuer pursuant to the Amended and Restated Statement of Designation of the Rights, Preferences and Privileges of Series B Convertible Perpetual Preferred Shares of the Issuer (as described in Item 4 hereof). The source of funds for the purchase of the 99,725 Common Shares reported herein directly owned by Preferred Friends Investment Company came from its working capital.  No borrowed funds were used to purchase the Common Shares, other than any borrowed funds used for working capital purposes in the ordinary course of business.

The source of funds for the purchases of the 156,043 Common Shares directly owned by Family United Navigation came from its working capital.  No borrowed funds were used to purchase the Common Shares, other than any borrowed funds used for working capital purposes in the ordinary course of business.

The other persons named in response to Item 2 hold the following number of Common Shares of the Issuer in their accounts:

The Reporting Persons acquired their Common Shares for investment and are filing this Schedule 13D/A to report a change in their beneficial ownership percentages of the Common Shares, as indicated in Item 5 below.

Except as set forth above, the Reporting Persons do not have any present plan or proposal which would relate to or result in any of the matters set forth in subparagraphs (a) - (j) of Item 4 of Schedule 13D.  The Reporting Persons intend to review their investment in the Issuer on a continuing basis.  Depending on various factors, the Reporting Persons may in the future take such actions with respect to their investment in the Issuer as they deem appropriate including, without limitation, purchasing additional Common Shares, selling some or all of their Common Shares, engaging in short selling of or any hedging or similar transaction with respect to the Common Shares or changing its intention with respect to any and all matters referred to in Item 4.

As of the date hereof, Family United Navigation may be deemed to be the beneficial owner of 156,043 Common Shares, constituting 2.2% of the Common Shares, based upon 7,244,891 Common Shares outstanding.  Family United Navigation has the sole power to vote or direct the vote of 156,043 Common Shares and the shared power to vote or direct the vote of 0 Common Shares.  Family United Navigation has the sole power to dispose or direct the disposition of 156,043 Common Shares and the shared power to dispose or direct the disposition of 0 Common Shares.

None of the other persons named in response to Item 2 have the sole power to vote or to direct the vote, the shared power to vote or direct the vote, the sole power to dispose or to direct the disposition of the Common Shares that are the subject of this Schedule 13D/A.

The transactions in the Common Shares by Friends Investment Company since the past 60 days are set forth on Exhibit B.

The transactions in the Common Shares by Preferred Friends Investment Company since the conversion of its Series B Convertible Perpetual Preferred Shares on June 15, 2021 are set forth on Exhibit C.

The information set forth in Item 4 above is incorporated by reference in its entirety in this Item 6.  In addition, the information set forth in Item 4 and Item 6 of the Schedule 13D filed with the Securities and Exchange Commission in respect of the Issuer on June 10, 2019 by the Reporting Persons are incorporated herein by reference.

Other than as set forth above, the Reporting Persons do not have any contract, arrangement, understanding or relationship with any person with respect to securities of the Issuer.

Exhibit A:  Joint Filing Agreement

Exhibit B:  Schedule of Transactions in the Common Shares by Friends Investment Company

Exhibit C:  Schedule of Transactions in the Common Shares by Family United Navigation Co.

SIGNATURES

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.

	Preferred Friends Investment Company Inc.
	By:  /s/ Aristides J. Pittas
	Name: Aristides J. Pittas Title: President

Attention:  Intentional misstatements or omissions of fact constitute Federal criminal violations (see 18 U.S.C. 1001).

Exhibit A

The undersigned agree that this Amendment No. 25 to Schedule 13D, dated July 15, 2021, relating to the Common Shares, $0.03 par value, of Euroseas Ltd. shall be filed on behalf of the undersigned.

	Preferred Friends Investment Company Inc.
	By:  /s/ Aristides J. Pittas
	Name: Aristides J. Pittas Title: President

Exhibit B

SCHEDULE OF TRANSACTIONS IN COMMON SHARES BY FRIENDS INVESTMENT COMPANY

Schedule of Transactions in Common Shares by Friends Investment Company*

Exhibit C

SCHEDULE OF TRANSACTIONS IN COMMON SHARES BY PREFERRED FRIENDS INVESTMENT COMPANY

Schedule of Transactions in Common Shares by Preferred Friends Investment Company*

Date of Transaction	Title of Class	Number of Common Shares Acquired	Number of Common Shares Disposed	Price Per Common Share
06/24/2021	Common Shares, $0.03 par value	N/A	18,660	$25.95
06/25/2021	Common Shares, $0.03 par value	N/A	31,340	$26.01
06/25/2021	Common Shares, $0.03 par value	N/A	18,561	$26.19
06/28/2021	Common Shares, $0.03 par value	N/A	3,207	$24.55
06/29/2021	Common Shares, $0.03 par value	N/A	3,765	$23.15
06/29/2021	Common Shares, $0.03 par value	N/A	20,000	$23.14
06/30/2021	Common Shares, $0.03 par value	N/A	612	$23.00
07/08/2021	Common Shares, $0.03 par value	N/A	6,520	$22.14
07/11/2021	Common Shares, $0.03 par value	N/A	11,845	$22.03