Achillefs Konstantakopoulos discloses 19.7% stake in Costamare (CMDB)

Rhea-AI Filing Summary

Costamare Bulkers Holdings Ltd reports ownership disclosures in an amended Schedule 13G/A filed July 6, 2026. Achillefs Konstantakopoulos beneficially owns 4,790,965 shares (19.7%) and Costamare Shipping Services Ltd. owns 810,612 shares (3.3%). The filing states these percentages are calculated on an aggregate of 24,301,490 shares outstanding.

The filing attributes direct sole voting and dispositive power for most shares to Mr. Konstantakopoulos and reports that his ownership figure includes 156,000 shares held by his spouse and half of the shares held by Costamare Shipping Services Ltd. The reporting person disclaims beneficial ownership of the spouse-held shares.

Insights

Corporate Governance Analyst

Major shareholder filing clarifies voting and ownership structure.

Achillefs Konstantakopoulos is reported as beneficial owner of 4,790,965 shares representing 19.7% of the outstanding common stock, with sole voting power over 4,634,965 shares. The filing also shows an indirect stake via Costamare Shipping Services Ltd. of 810,612 shares (3.3%).

The statement disclaims beneficial ownership of spouse-held shares and attributes indirect ownership through a 50% interest in the Marshall Islands entity. Watch subsequent filings for any changes in voting power or amendments that affect the ownership percentage.

Key Figures

Beneficial ownership (Konstantakopoulos): 4,790,965 shares Percent of class (Konstantakopoulos): 19.7% Holding (Costamare Shipping Services Ltd.): 810,612 shares +3 more

6 metrics

Beneficial ownership (Konstantakopoulos) 4,790,965 shares reported in Schedule 13G/A filed 07/06/2026

Percent of class (Konstantakopoulos) <percent>19.7%</percent> calculated on aggregate of 24,301,490 shares outstanding

Holding (Costamare Shipping Services Ltd.) 810,612 shares reported ownership of Marshall Islands entity; <percent>3.3%</percent> of class

Shares outstanding (aggregate) 24,301,490 shares basis for percent ownership calculations

Sole voting/dispositive power 4,634,965 shares sole power reported for Mr. Konstantakopoulos

Shared voting/dispositive power 156,000 shares shares held by reporting person’s spouse

Key Terms

beneficially owned, sole voting power, shared dispositive power, Schedule 13G/A

4 terms

beneficially owned regulatory

"Amount beneficially owned: 1. Achillefs Konstantakopoulos - 4,790,965"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power regulatory

"Sole Voting Power 4,634,965.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

shared dispositive power regulatory

"Shared Dispositive Power 156,000.00"

Schedule 13G/A regulatory

"(Amendment No. 1 ) Costamare Bulkers Holdings Ltd"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

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

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Available on EDGAR 07/06/2026 - 04:18 PM Accepted by SEC EDGAR 07/06/2026 - 04:17 PM Learn about SEC filing dates

FAQ

What stake does Achillefs Konstantakopoulos report in CMDB?

He reports beneficial ownership of 4,790,965 shares, equal to 19.7% of the class. The filing states the percent is calculated on an aggregate of 24,301,490 shares outstanding.

How many shares does Costamare Shipping Services Ltd. hold in CMDB?

Costamare Shipping Services Ltd. is shown as owning 810,612 shares, equal to 3.3% of the class, and Mr. Konstantakopoulos is reported to own 50% of that entity.

What voting and dispositive powers are reported for Mr. Konstantakopoulos?

The filing lists sole voting power and sole dispositive power over 4,634,965 shares, and shared voting and dispositive power over 156,000 shares (spouse-held).

Does the filing include any ownership disclaimers for CMDB?

Yes. The filing disclaims beneficial ownership of the 156,000 shares owned by the reporting person’s spouse and states that the spouse-held shares are reported without conceding beneficial ownership by the filer.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Costamare Bulkers Holdings Ltd

(Name of Issuer)

Common Stock, $0.0001 Par Value

(Title of Class of Securities)

Y2001C101

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): Y2001C101

1

Names of Reporting Persons

Konstantakopoulos Achillefs

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

GREECE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 4,634,965.00
6	Shared Voting Power 156,000.00
7	Sole Dispositive Power 4,634,965.00
8	Shared Dispositive Power 156,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,790,965.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

19.7 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: Note to 9: Achillefs Konstantakopoulos personally owns 4,790,965 shares. This number also includes (i) 156,000 shares owned by the reporting person's spouse and (ii) half of the shares (810,612) of Costamare Shipping Services Ltd. The reporting person disclaims beneficial ownership of the shares owned by the reporting person's spouse, and the reporting thereof shall not constitute an admission that the reporting person is a beneficial owner of such shares. Note to 11: The percent ownership is calculated based upon an aggregate of 24,301,490 shares outstanding.

SCHEDULE 13G

CUSIP Number(s): Y2001C101

1

Names of Reporting Persons

Costamare Shipping Services Ltd.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MARSHALL ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 810,612.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 810,612.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

810,612.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.3 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: Note to 9: Achillefs Konstantakopoulos owns 50% of the outstanding equity of Costamare Shipping Services Ltd., resulting in his indirect ownership of half of the stock (810,612 shares) owned by Costamare Shipping Services Ltd. Note to 11: The percent ownership is calculated based upon an aggregate of 24,301,490 shares outstanding.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Costamare Bulkers Holdings Ltd
(b)	Address of issuer's principal executive offices: 7 Rue du Gabian, MC, Monaco, 98000
Item 2.
(a)	Name of person filing: Achillefs Konstantakopoulos Costamare Shipping Services Ltd.
(b)	Address or principal business office or, if none, residence: The principal business office of each person named in Item 2(a) above is: 5 Pentelis Street, 17564 Athens, Greece
(c)	Citizenship: Achillefs Konstantakopoulos is a citizen of Greece. Costamare Shipping Services Ltd. is a Marshall Islands corporation.
(d)	Title of class of securities: Common Stock, $0.0001 Par Value
(e)	CUSIP No.: Y2001C101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1. Achillefs Konstantakopoulos - 4,790,965 2. Costamare Shipping Services Ltd. - 810,612.
(b)	Percent of class: 1. Achillefs Konstantakopoulos - 19.7% 2. Costamare Shipping Services Ltd. - 3.3%.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Achillefs Konstantakopoulos - 4,634,965. Costamare Shipping Services Ltd. - 810,612.
	(ii) Shared power to vote or to direct the vote: Achillefs Konstantakopoulos - 156,000. Costamare Shipping Services Ltd. - 0
	(iii) Sole power to dispose or to direct the disposition of: Achillefs Konstantakopoulos - 4,634,965. Costamare Shipping Services Ltd. - 810,612.
	(iv) Shared power to dispose or to direct the disposition of: Achillefs Konstantakopoulos - 156,000. Costamare Shipping Services Ltd. - 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

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.

Konstantakopoulos Achillefs

Signature:	/s/ Achillefs Konstantakopoulos
Name/Title:	Achillefs Konstantakopoulos
Date:	07/06/2026

Costamare Shipping Services Ltd.

Signature:	/s/ Ioannis Platsidakis
Name/Title:	Ioannis Platsidakis
Date:	07/06/2026