COSTAMARE BULKERS HLDGS LTD CMDB
COM SHS · Common Stock · CUSIP Y2001C101
- SectorIndustrials
- IndustryWater Transportation
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($413.4k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $17.56.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2025 | 90 |
| Q3 2025 | 92 |
| Q4 2025 | 91 |
| Q1 2026 | 97 |
| Q2 2026 | 99 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2025 | 45 | 47 |
| Q4 2025 | 37 | 47 |
| Q1 2026 | 43 | 34 |
| Q2 2026 | 42 | 44 |
Biggest buyers
| AMERIPRISE FINANCIAL INC | Added | +48.0k |
| JACOBS LEVY EQUITY MANAGEMENT, INC | New | +37.8k |
| TWO SIGMA INVESTMENTS, LP | Added | +36.1k |
| STRS OHIO | Added | +34.9k |
| BOOTHBAY FUND MANAGEMENT, LLC | Added | +22.1k |
| Oceanic Investment Management LTD | Added | +22.1k |
| Arax Advisory Partners | Added | +21.1k |
| BlackRock, Inc. | Added | +16.6k |
| CITIGROUP INC | Added | +15.5k |
| Quantinno Capital Management LP | Added | +12.7k |
Biggest sellers
| Walleye Capital LLC | Reduced | -53.9k |
| Schonfeld Strategic Advisors LLC | Sold out | -45.4k |
| JANE STREET GROUP, LLC | Sold out | -44.4k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Reduced | -29.0k |
| CITADEL ADVISORS LLC | Reduced | -24.7k |
| GOLDMAN SACHS GROUP INC | Reduced | -20.0k |
| Empowered Funds, LLC | Reduced | -19.0k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Sold out | -14.5k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -14.4k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -12.2k |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Konstantakopoulos Konstantinos 13D · may seek influence +1.2 pts · filed 2025-10-20 | 30.9% |
Konstantakopoulos Achillefs
13D · may seek influence
+0.8 pts · filed 2026-07-20
Stated purposeMr. 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 … Full filing |
20.5% |
| Konstantakopoulos Christos 13G · exempt (held before listing) new · filed 2025-05-06 | 15.7% |
| DIMENSIONAL FUND ADVISORS LP 13G · institution new · filed 2025-07-15 | 6.1% |
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 1 | $982 | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 1 | $442.9k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-08-06 | Zikos Grigorios Chief Executive Officer, director · See Footnote | Sold | $442.9k24.2k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 1.3m $22.7m | Reduced -14.4k |
| BlackRock, Inc. 0.00% of their portfolio | 556.3k $9.8m | Added +16.6k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 425.4k $7.5m | Added +48.0k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 318.0k $5.6m | Reduced -2.8k |
| Oceanic Investment Management LTD 6.33% of their portfolio | 277.8k $4.9m | Added +22.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 196.1k $3.4m | Reduced -8.3k |
| MORGAN STANLEY 0.00% of their portfolio | 156.3k $2.7m | Reduced -2.5k |
| STATE STREET CORP 0.00% of their portfolio | 141.9k $2.5m | Reduced -990 |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 117.6k $2.1m | Reduced -4.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 114.0k $2.0m | Added +7.3k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.04% of their portfolio | 111.3k $2.0m | Added +22.1k |
| Nuveen, LLC 0.00% of their portfolio | 99.5k $1.7m | Reduced -2.0k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 95.9k $1.7m | Added +1.4k |
| Quantinno Capital Management LP 0.00% of their portfolio | 74.8k $1.3m | Added +12.7k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 72.8k $1.3m | Reduced -29.0k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 64.1k $1.1m | Added +36.1k |
| Walleye Capital LLC 0.01% of their portfolio | 60.7k $1.1m | Reduced -53.9k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 58.1k $1.0m | Added +7.0k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 55.0k $965.7k | Added +73 |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 54.3k $954.3k | Reduced -20.0k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 53.0k $930.5k | Reduced -287 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 51.9k $910.9k | Reduced -8.1k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 49.5k $869.5k | Reduced -7.3k |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 39.8k $698.6k | Added +7.2k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio | 37.8k $664.5k | New |
| STRS OHIO 0.00% of their portfolio | 36.5k $640.9k | Added +34.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 34.2k $614.9k | Added +1.8k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 33.5k $587.5k | Reduced -24.7k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 30.8k $541.0k | Reduced -12.2k |
| CITIGROUP INC 0.00% of their portfolio | 30.0k $526.1k | Added +15.5k |
| HORIZON KINETICS ASSET MANAGEMENT LLC 0.01% of their portfolio | 27.6k $484.3k | Unchanged |
| Moran Wealth Management, LLC 0.01% of their portfolio | 26.7k $468.9k | Added +6.2k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 25.2k $443.1k | Added +12.2k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 24.7k $433.6k | Added +982 |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.03% of their portfolio | 23.3k $409.7k | Unchanged |
| Empowered Funds, LLC 0.00% of their portfolio | 23.0k $404.4k | Reduced -19.0k |
| Arax Advisory Partners 0.00% of their portfolio | 22.8k $400.4k | Added +21.1k |
| Creative Planning 0.00% of their portfolio | 19.0k $333.0k | Reduced -2.4k |
| XTX Topco Ltd 0.00% of their portfolio | 15.1k $264.3k | Added +331 |
| Trexquant Investment LP 0.00% of their portfolio | 14.3k $251.6k | Reduced -5.6k |
| WINTON GROUP Ltd 0.01% of their portfolio | 13.3k $234.0k | Reduced -21 |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 12.9k $225.8k | Added +1.1k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 12.3k $215.2k | Added +240 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 12.2k $188.3k | Unchanged |
| Savant Capital, LLC 0.00% of their portfolio | 11.0k $193.5k | Reduced -31 |
| Squarepoint Ops LLC 0.00% of their portfolio | 10.8k $189.6k | New |
| ALGERT GLOBAL LLC 0.00% of their portfolio | 10.5k $183.6k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 9.1k $160.5k | Added +4.3k |
| FMR LLC 0.00% of their portfolio | 8.6k $151.5k | Added +39 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 7.0k $123.6k | Added +232 |
| BARCLAYS PLC 0.00% of their portfolio | 6.8k $119.2k | Reduced -422 |
| UBS Group AG 0.00% of their portfolio | 5.2k $91.4k | Reduced -5.0k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 3.9k $68.9k | Reduced -367 |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 3.5k $62.0k | Reduced -106 |
| GAMMA Investing LLC 0.00% of their portfolio | 2.6k $44.9k | Reduced -43 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 2.5k $44.6k | Added +644 |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 2.2k $38.9k | Unchanged |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 1.8k $32.4k | Unchanged |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 1.6k $28.0k | New |
| Parallel Advisors, LLC 0.00% of their portfolio | 1.6k $28.0k | Reduced -347 |
| Blue Trust, Inc. 0.00% of their portfolio | 1.4k $25.0k | Reduced -328 |
| Allworth Financial LP 0.00% of their portfolio | 1.1k $19.4k | Added +1.0k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 1.0k $17.9k | Reduced -1.3k |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 859 $15.1k | Unchanged |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 831 $15.0k | Reduced -16 |
| SIGNATUREFD, LLC 0.00% of their portfolio | 776 $13.6k | Reduced -59 |
| Legal & General Group Plc 0.00% of their portfolio | 740 $13.0k | Unchanged |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 412 $7.2k | Reduced -265 |
| Private Wealth Management Group, LLC 0.00% of their portfolio | 231 $4.1k | Unchanged |
| JPL Wealth Management, LLC 0.00% of their portfolio | 205 $3.6k | Added +201 |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 204 $3.6k | New |
| MassMutual Private Wealth & Trust, FSB 0.00% of their portfolio | 185 $3.2k | Unchanged |
| Torren Management, LLC 0.00% of their portfolio | 176 $3.1k | Unchanged |
| Sterling Capital Management LLC 0.00% of their portfolio | 153 $2.7k | Reduced -122 |
| Smartleaf Asset Management LLC 0.00% of their portfolio | 141 $2.5k | Unchanged |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 132 $2.3k | Added +66 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 117 $2.1k | Reduced -358 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 100 $1.8k | Unchanged |
| Buck Wealth Strategies, LLC 0.00% of their portfolio | 100 $1.8k | New |
| EverSource Wealth Advisors, LLC 0.00% of their portfolio | 99 $1.7k | Reduced -124 |
| ARMSTRONG ADVISORY GROUP, INC 0.00% of their portfolio | 90 $1.6k | Unchanged |
| Boreal Capital Management LLC 0.00% of their portfolio | 70 $1.2k | New |
| Versant Capital Management, Inc 0.00% of their portfolio | 64 $1.1k | Unchanged |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 55 $966 | Added +1 |
| RAFFA WEALTH MANAGEMENT, LLC 0.00% of their portfolio | 48 $843 | New |
| HUNTINGTON NATIONAL BANK 0.00% of their portfolio | 46 $811 | Unchanged |
| Essential Partners LLC 0.00% of their portfolio | 46 $808 | Reduced -291 |
| IFP Advisors, Inc 0.00% of their portfolio | 38 $667 | Unchanged |
| Cornerstone Planning Group LLC 0.00% of their portfolio | 37 $697 | Unchanged |
| Basecamp Wealth Advisors LLC 0.00% of their portfolio | 28 $492 | Added +6 |
| SJS Investment Consulting Inc. 0.00% of their portfolio | 22 $388 | Added +2 |
| ASSETMARK, INC 0.00% of their portfolio | 21 $369 | Unchanged |
| MATHER GROUP, LLC. 0.00% of their portfolio | 21 $369 | Unchanged |
| Physician Wealth Advisors, Inc. 0.00% of their portfolio | 21 $369 | Unchanged |
| ROTHSCHILD INVESTMENT LLC 0.00% of their portfolio | 16 $281 | New |
| Covestor Ltd 0.00% of their portfolio | 15 $0 | Unchanged |
| Quarry LP 0.00% of their portfolio | 11 $193 | New |
| FIFTH THIRD BANCORP 0.00% of their portfolio | 9 $158 | Reduced -3 |
| Clearstead Advisors, LLC 0.00% of their portfolio | 1 $18 | New |