Hudbay, Mitsubishi Approve Copper World Construction With Initial Spending of $2.07 Billion
Key Facts
Hudbay Minerals and Mitsubishi have approved the final investment decision to build and develop the Copper World copper project, with initial growth capital expenditure estimated at about $2.07 billion, according to Hudbay's statement approving the project. The decision moves the project into the construction and development phase approved by the partners, with ownership split between the operator and its Japanese partner under their partnership agreement. Hudbay holds a majority stake of 70% in the project, according to Mitsubishi's statement outlining the ownership structure at the time of the investment decision. Mitsubishi holds the remaining 30% and plans to provide additional funding as development proceeds. The project's new estimates cover copper production, cash costs and mine life, alongside a spending plan funded through partner contributions and project-level borrowing.
The study estimates average annual copper production of about 102,000 metric tonnes during the first 10 years of operations, according to Hudbay, the period covered by the project's announced production average. That compares with a previous estimate of 92,000 metric tonnes a year in the prefeasibility study, putting expected output in the new study above the level underpinning the earlier assessment. The previous study was released in 2023, according to the comparison Hudbay provided in its statement approving construction and development. The base-case mine life is 15 years, meaning the initial production estimate covers part of the planned operating life. Mitsubishi, for its part, estimates average copper cash costs over the life of the mine at about $1.70 per pound, according to its statement on the development decision.
For development funding, Hudbay's plan assumes about $650 million in project-level borrowing as part of the financing expected to support construction. The company expects its own equity contributions to total about $500 million, according to the plan announced alongside the final investment decision. The plan defers Hudbay's first equity contribution until 2028, with contributions beginning after development approval. In financing already completed for the project, Hudbay announced the closing of a municipal bond issue with an aggregate principal amount of $52 million, according to its statement on the issuance. Those bonds carry an interest rate of 4.50%, while the borrowing included in the development plan remains anticipated project-level financing, according to the company's wording.
On the Japanese side of the partnership, Mitsubishi announced plans to provide an additional investment of $423 million for the project's initial funding as it approved the decision to proceed with development. The company said the actual amount of this investment would vary depending on the use of external financing, linking the additional contribution to financing arrangements. Mitsubishi's total planned investment in Copper World reaches $1,023 million following the announced additional investment, according to its statement. The company made an initial cash contribution of about $420 million at the closing of the partnership transaction, according to Hudbay's statement announcing completion of the deal. The partnership agreement also provided for an additional cash contribution of $180 million from Mitsubishi to complete its initial investment within 18 months of closing, the original commitment set out in the announcement of the partnership's completion.
The Japanese investment in copper reflects Mitsubishi's outlook for growing U.S. demand for the metal, which the company links to rising electricity consumption and electrification. Mitsubishi said demand drivers included "increased electricity demand from generative AI and the expansion of data centers, and electrification," according to its statement on the partnership. On the supply side, the company cited declining ore grades as one of the challenges making new mine development more difficult and raising concerns about supply stability. Hudbay's operating assets include the Constancia mine in Peru, according to the company's announcement of its next financial results release. Its assets also include the Snow Lake and Copper Mountain operations in Canada, alongside the Copper World project whose construction and development the partners have approved.
On the project timeline, the companies aim to begin production in the second half of 2029, according to the target Mitsubishi announced alongside the investment decision. That target follows a development phase whose funding commitments are split between the partners and external financing under the announced plans. On Hudbay's nearer-term calendar, the company plans to release third-quarter results before the market opens on November 12, 2026, according to its results announcement. The company designated Thursday for that next financial release, which covers results for the stated quarterly period. The results release precedes both the planned start of Hudbay's equity contributions and Copper World's targeted production date, according to the timelines announced by the companies.