What were the key drivers behind any variance in performance, such as freight rates, vessel utilization, or charter rates?

The brief news release you provided only tells us that Costamare Bulkers Holdings Limited (NYSE: CMDB) announced its unaudited financial results for the six‑month period ended 30 June 2025. It does not include any specific commentary on why the company’s performance differed from prior periods—there are no details on freight‑rate movements, vessel‑utilization trends, charter‑rate changes, fuel‑cost impacts, supply‑demand dynamics in the dry‑bulk market, or any other operational or macro‑economic factors.

Because the summary does not disclose the underlying drivers, we can’t point to concrete reasons (e.g., higher spot freight rates, improved charter‑rate negotiations, better fleet utilization, or reduced dry‑dock time) for any variance in Costamare Bulkers’ H1 2025 results. To obtain that insight you would need to review the full earnings release or the accompanying management discussion and analysis, which typically explains:

1. Freight‑rate environment – how spot and contract rates for the vessel types in Costamare’s fleet moved during the period.
   
2. Vessel utilization – any changes in on‑hand tonnage, time‑off‑hire, or dead‑heading that affected revenue.
   
3. Charter‑rate negotiations – whether existing time‑charter contracts were re‑priced or new contracts were secured at more favorable terms.
   
4. Operating costs – impacts from bunker fuel price volatility, crew and insurance costs, and any cost‑saving initiatives.
   
5. Market outlook – management’s view on supply‑demand balance, new vessel deliveries, and macro‑economic factors (e.g., commodity demand, trade‑flow shifts).

What to do next:

- Locate the full “Costamare Bulkers Holdings Limited – H1 2025 Results” press release on the company’s investor‑relations website or the original GlobeNewswire posting.

- Look for the “Management Discussion & Analysis” or “Key Financial Highlights” sections, where the company typically outlines the drivers behind revenue, EBITDA, and net‑income changes.

- If you have access to a financial database (e.g., Bloomberg, Refinitiv, or S&P Capital IQ), you can also retrieve the earnings call transcript for August 2025, which will contain Q&A about freight rates, utilization, and charter‑rate trends.

In summary, the information you shared does not contain the specific performance drivers; reviewing the detailed earnings release or accompanying commentary will be necessary to answer the question definitively.