Costamare Bulkers Holdings Ltd (CMDB) shareholders
Close on Nov 12, 2026Market cap $473.22MP/E –Yield –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Konstantakopoulos Konstantinos Joint filing with Kent Maritime Investments S.A. (12.40%) | 7,458,806 | 30.90% | 13D (active) amendment | Oct 16, 2025 |
| Konstantakopoulos, Konstantinos Joint filing with Kent Maritime Investments S.A. (12.30%) | 6,933,667 | 28.60% | 13D (active) | May 6, 2025 |
| Achillefs Konstantakopoulos | 4,979,706 | 20.50% | 13D (active) | Jul 17, 2026 |
| Konstantakopoulos Achillefs | 4,790,965 | 19.70% | 13G (passive) amendment | Jun 30, 2026 |
| Konstantakopoulos, Achillefs | 4,523,506 | 18.70% | 13G (passive) | May 6, 2025 |
| Konstantakopoulos, Christos | 3,810,317 | 15.70% | 13G (passive) | May 6, 2025 |
| Dimensional Fund Advisors LP | 1,465,556 | 6.10% | 13G (passive) | Jun 30, 2025 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of CMDB | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Dimensional Fund Advisors LP | 1,294,494 | 5.35% | $22.73M | −14,363 | 0.00% |
| BlackRock, Inc. | 556,263 | 2.30% | $9.77M | +16,567 | 0.00% |
| Ameriprise Financial Inc | 425,412 | 1.76% | $7.47M | +48,011 | 0.00% |
| American Century Companies Inc | 317,984 | 1.32% | $5.58M | −2,762 | 0.00% |
| Oceanic Investment Management LTD | 277,778 | 1.15% | $4.88M | +22,101 | 4.14% |
| Renaissance Technologies LLC | 196,146 | 0.81% | $3.44M | −8,293 | 0.00% |
| Morgan Stanley | 156,325 | 0.65% | $2.75M | −2,525 | 0.00% |
| State Street Corp | 141,901 | 0.59% | $2.49M | −990 | 0.00% |
| Qube Research & Technologies Ltd | 117,562 | 0.49% | $2.06M | −4,338 | 0.00% |
| Geode Capital Management, LLC | 114,016 | 0.47% | $2.00M | +7,327 | 0.00% |
| Boothbay Fund Management, LLC | 111,340 | 0.46% | $1.96M | +22,101 | 0.03% |
| Nuveen, LLC | 99,495 | 0.41% | $1.75M | −2,050 | 0.00% |
| Russell Investments Group, Ltd. | 95,867 | 0.40% | $1.68M | +1,442 | 0.00% |
| Quantinno Capital Management LP | 74,757 | 0.31% | $1.31M | +12,653 | 0.00% |
| Bridgeway Capital Management, LLC | 72,830 | 0.30% | $1.28M | −29,000 | 0.02% |
| Two Sigma Investments, LP | 64,121 | 0.27% | $1.13M | +36,131 | 0.00% |
| Walleye Capital LLC | 60,678 | 0.25% | $1.07M | −53,899 | 0.00% |
| Vanguard Portfolio Management LLC | 58,059 | 0.24% | $1.02M | +7,001 | 0.00% |
| Charles Schwab Investment Management Inc | 54,994 | 0.23% | $965.70K | +73 | 0.00% |
| Goldman Sachs Group Inc | 54,343 | 0.22% | $954.26K | −19,956 | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 99 | 5M | 21.1% | 11 / 31 | 36 / 8 | 0M | 0M |
| Q1 2026 | 97 | 5M | 21.1% | 14 / 31 | 27 / 7 | 1M | 0M |
| Q4 2025 | 91 | 4M | 18.5% | 13 / 27 | 33 / 14 | 1M | 1M |
| Q3 2025 | 92 | 4M | 18.3% | 18 / 27 | 33 / 14 | 0M | 1M |
| Q2 2025 | 88 | 5M | 21.2% | 88 / 0 | 0 / 0 | 5M | 0M |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Grigorios Zikos | Chief Executive Officer, Director | 0 | – | Aug 7, 2026 |
| Dimitrios Pagratis | Chief Financial Officer | – | – | Mar 18, 2026 |
| Katerina Eleftheriou | Director | 865 | 0.00% | Mar 31, 2026 |
| David Charles Anthony Grant | Director | 800 | 0.00% | Mar 18, 2026 |
| Dimitrios Sofianopoulos | Director | – | – | Mar 18, 2026 |
| Peter De Place Lund | Director | 3,738 | 0.02% | Mar 18, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Grigorios Zikos Chief Executive Officer, Director | Aug 6, 2026 | Sale | −24,203 | $18.30 | $442.91K | 0 |
| Katerina Eleftheriou Director | Mar 27, 2026 | Buy | +65 | $15.11 | $982 | 865 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of Costamare Bulkers's stock actually held short. Settlement fails (shares not delivered on time) peaked at 6 shares on Oct 9, 2026 over the last 90 days.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Dilofo Holdings Limited Officer, Director | Aug 6, 2026 | 24,203 | $442.87K | Aug 6, 2026 | Compensation for Past Services |
| Dilofo Holdings Limited Officer, Director | Feb 25, 2026 | 15,825 | $288.67K | Feb 25, 2026 | Compensation for Past Services |
See a number that looks wrong?