CMDB at a glance
Costamare Bulkers Holdings Ltd (CMDB, SEC CIK 2033535) filed Form 4 insider filings as recently as August 7, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- As of June 30, 2026, 20 institutional investment managers tracked by SignalX reported holding Costamare Bulkers Holdings Ltd (CMDB) shares worth $57.1 million in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Zikos Grigorios on August 6, 2026 of 24,203 shares at $18.30 per share.
- In the last 90 days, CMDB insiders reported 0 open-market purchases ($0) and 1 open-market sale ($443K) on Form 4, a net sale of $443K.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Insiders · 90 days
- 0 buys · 1 sell
- Net −$443K
- 13F holders
- 20 funds
- $57.1M · +0 vs prior quarter
SignalX for CMDB
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Zikos Grigorios | Sell | Aug 6, 2026 | 24,203 | $18.30 |
| Eleftheriou Katerina | Buy | Mar 27, 2026 | 65 | $15.11 |
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate CMDB share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 20 | $57.1M |
| Q1 2026 | 20 | $49.5M |
| Q4 2025 | 19 | $43.3M |
| Q3 2025 | 19 | $41.4M |
| Q2 2025 | 18 | $24.5M |
- Ameriprise Financial+48.0K (+13%)
- Two Sigma Investments+36.1K (+129%)
- BlackRock+16.6K (+3%)
- Citigroup+15.5K (+107%)
- AQR Capital Management+12.2K (+94%)
- Citadel Advisors LLC−24.7K (-42%)
- Goldman Sachs Group−20.0K (-27%)
- Dimensional Fund Advisors−14.4K (-1%)
- Millennium Management−12.2K (-28%)
- Renaissance Technologies LLC−8.3K (-4%)
Source: 13F-HR filings on SEC EDGAR (aggregated from 96 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
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CMDB SEC filings: frequently asked questions
Are CMDB insiders buying or selling?
In the last 90 days, Costamare Bulkers Holdings Ltd (CMDB) officers, directors and 10% owners reported no open-market purchases and 1 open-market sale worth $442,869 by 1 insider on Form 4. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold CMDB stock?
As of June 30, 2026, the largest Costamare Bulkers Holdings Ltd (CMDB) holders among the 13F filers tracked by SignalX were Dimensional Fund Advisors ($22.7 million), BlackRock ($9.8 million), Ameriprise Financial ($7.5 million), Renaissance Technologies LLC ($3.4 million), Morgan Stanley ($2.7 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What are the latest CMDB SEC filings?
Costamare Bulkers Holdings Ltd (CMDB) filed a Form 4 insider filing on August 7, 2026.
What is CMDB's SEC CIK number?
Costamare Bulkers Holdings Ltd (CMDB)'s SEC Central Index Key (CIK) is 2033535. EDGAR lists every CMDB filing under that number.
Ask anything about CMDB
The research agent reads CMDB's filings, financials, insider trades and 13F holders, then answers with sources.