Costamare Bulkers Holdings Ltd
CMDB- Exchange
- NYSE
- Industry
- Water Transportation
- SEC CIK
- 0002033535
In the last 90 days, Costamare Bulkers Holdings Ltd insiders filed 0 open-market purchases and 1 sale; 98 institutions reported holding it in 13F filings for Q2 2026, worth $89.8M in total; no superinvestor holds it.
Holders of 5% or more of CMDB
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Costamare Bulkers Holdings Ltd, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Konstantakopoulos Konstantinos | 13D/A | 30.90%7.46M shares | +1.20 ppfrom 29.70% | May 6, 20253 filings | Oct 20, 2025 | SEC |
| Konstantakopoulos Achillefs | 13G | 18.70%4.52M shares | New | May 6, 20251 filing | May 6, 2025 | SEC |
| Konstantakopoulos Christos | 13G | 15.70%3.81M shares | New | May 6, 20251 filing | May 6, 2025 | SEC |
| Dimensional Fund Advisors LP | 13G | 6.10%1.47M shares | New | Jul 15, 20251 filing | Jul 15, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on Costamare Bulkers Holdings Ltd, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Oct 20, 20256:29 PM ET | Konstantakopoulos Konstantinosand 4 others | 13D/A | 30.90%7.46M shares | +1.20 ppfrom 29.70% | Oct 16, 2025 | SEC |
| Aug 28, 20254:37 PM ET | Konstantakopoulos Konstantinosand 4 others | 13D/A | 29.70%7.20M shares | +1.10 ppfrom 28.60% | Aug 26, 2025 | SEC |
| Jul 15, 20254:03 PM ET | Dimensional Fund Advisors LP | 13G | 6.10%1.47M shares | New | Jun 30, 2025 | SEC |
| May 6, 20255:54 PM ET | Konstantakopoulos Christos | 13G | 15.70%3.81M shares | New | May 6, 2025 | SEC |
| May 6, 20255:51 PM ET | Konstantakopoulos Achillefsand 1 other | 13G | 18.70%4.52M shares | New | May 6, 2025 | SEC |
| May 6, 20255:47 PM ET | Konstantakopoulos Konstantinosand 4 others | 13D | 28.60%6.93M shares | New | May 6, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Costamare Bulkers Holdings Ltd shares.
No Form 144 notices for Costamare Bulkers Holdings Ltd are on file.