As of November 8, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Costamare Bulkers Holdings Limited. The largest reported stake is Konstantakopoulos Konstantinos', at 30.9%. 5 filings are on record since July 15, 2025 (Schedule 13D/A, October 20, 2025).
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Key facts
- · Reporting person: Achillefs Konstantakopoulos · Sole voting: 4,823,706 · Shared voting: 156,000 · Sole dispositive: 4,823,706 · Shared dispositive: 156,000 · SCHEDULE 13D, 2026-07-20
- · Holder: Konstantakopoulos Achillefs · Percent: 19.7% · SCHEDULE 13G/A
- · Holder: Konstantakopoulos Konstantinos · Percent: 30.9% · SCHEDULE 13D/A
- · Holder: Konstantakopoulos Konstantinos · Percent: 29.7% · SCHEDULE 13D/A
- · Holder: Dimensional Fund Advisors LP · Percent: 6.1% · SCHEDULE 13G
Costamare Bulkers Holdings Limited has 5 Schedule 13D or 13G filings on record since 2025-07-15. 3 holders' latest filing reports 5% or more of common stock, $0.0001 par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 30.9% | 7,458,806 | SCHEDULE 13D/A, 2025-10-20 | 2025-10-16 | |
| 20.5% | 4,979,706 | SCHEDULE 13D, 2026-07-20 | 2026-07-17 | |
| Dimensional Fund Advisors LP | 6.1% | 1,465,556 | SCHEDULE 13G, 2025-07-15 | 2025-06-30 |
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More on Costamare Bulkers Holdings Limited and the records around it.
Costamare Bulkers Holdings Limited elsewhere on the record
Companies that share a holder
- Konstantakopoulos Konstantinos also filed stake reports on 1 other company: Seanergy Maritime Holdings Corp. (Sep 2026)
- Dimensional Fund Advisors LP also filed stake reports on 366 other companies: Acadia Healthcare Co Inc (Oct 2026), ADT Inc (Oct 2026), AGCO Corp (Oct 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Achillefs Konstantakopoulos | 4,823,706 | 156,000 | 4,823,706 | 156,000 | SCHEDULE 13D, 2026-07-20 |
| Costamare Shipping Services Ltd. | 810,612 | 0 | 810,612 | 0 | SCHEDULE 13D, 2026-07-20 |
The latest filing identifies Costamare Bulkers Holdings Limited by CUSIP Y2001C101 and gives its principal executive office as 7 Rue du Gabian, MC (SCHEDULE 13D, 2026-07-20).
Source of funds (Item 3)
On May 6, 2025, Costamare Inc. ("CMRE") distributed in the form of a dividend all of the then-outstanding Common Stock on a pro rata basis to the record holders of the common stock, par value $0.0001 per share, of CMRE (the "CMRE Common Shares" and such distribution, the "Distribution"). Each CMRE shareholder received one share of Common Stock for every five CMRE Common Shares held as of 5:00 p.m., New York City time, on April 29, 2025 (the "Record Date").Achillefs Konstantakopoulos, SCHEDULE 13D, 2026-07-20
Purpose of Transaction (Item 4)
Achillefs Konstantakopoulos
Mr. Konstantakopoulos is the direct and indirect owner of the Common Stock identified on the cover pages to this Schedule 13D. The Reporting Persons acquired the securities reported herein for investment purposes. The Reporting Persons intend to review their holdings in the Issuer on a continuing basis and, depending upon the price and availability of the Issuer's securities, subsequent developments affecting the Issuer, the business prospects of the Issuer, general stock market and economic conditions, tax considerations, investment considerations and/or other factors deemed relevant, may consider increasing or decreasing their investment in the Issuer, including through one or more open market purchases or private transactions. The timing and amount of such acquisitions or dispositions will depend on the conditions and considerations described in the preceding sentence and may be entered into pursuant to a Rule 10b5-1 plan. As part of this ongoing review, the Reporting Persons have engaged and/or may in the future engage, legal and financial advisors to assist them in such review and in evaluating strategic alternatives that are or may become available with respect to their holdings in the Issuer. Except as set forth in this Schedule 13D, none of the Reporting Persons has any plan or proposal that relates to or would result in any of the transactions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. However, each of the Reporting Persons reserves the …The first part of Item 4 of the SCHEDULE 13D filed 2026-07-20; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-15 | Dimensional Fund Advisors LP | 6.1% | SCHEDULE 13G |
| 2025-08-28 | Konstantakopoulos Konstantinos | 29.7% | SCHEDULE 13D/A |
| 2025-10-20 | Konstantakopoulos Konstantinos | 30.9% | SCHEDULE 13D/A |
| 2026-07-06 | Konstantakopoulos Achillefs | 19.7% | SCHEDULE 13G/A |
| 2026-07-20 | Achillefs Konstantakopoulos | 20.5% | SCHEDULE 13D |
Questions about who owns Costamare Bulkers Holdings Limited
Who owns Costamare Bulkers Holdings Limited?
On this page, 3 holders' latest ownership filings report 5% or more of Costamare Bulkers Holdings Limited: Konstantakopoulos Konstantinos (30.9%, Schedule 13D/A, filed 2025-10-20), Achillefs Konstantakopoulos (20.5%, Schedule 13D, filed 2026-07-20) and Dimensional Fund Advisors LP (6.1%, Schedule 13G, filed 2025-07-15).
Who are the largest shareholders of Costamare Bulkers Holdings Limited?
By the share each holder's latest filing reports, the largest holders of Costamare Bulkers Holdings Limited on this page are Konstantakopoulos Konstantinos (30.9%), Achillefs Konstantakopoulos (20.5%) and Dimensional Fund Advisors LP (6.1%).
When did Konstantakopoulos Konstantinos buy into Costamare Bulkers Holdings Limited?
The filings give report dates, not purchase dates. The earliest filing from Konstantakopoulos Konstantinos on this page is the Schedule 13D/A, filed 2025-08-28, reporting 29.7%; its latest, Schedule 13D/A filed 2025-10-20, reports 30.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 5 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.