Hudbay Receives Regulatory Approval to Further Increase Mill Throughput at its Constancia Mine in Peru

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Hudbay Receives Regulatory Approval to Further Increase Mill Throughput at its Constancia Mine in Peru TORONTO, July 02, 2026 (GLOBE NEWSWIRE) -- Hudbay Minerals Inc. (“Hudbay” or the “Company”) (TSX, NYSE: HBM) announced it has received approval from the National Environmental Certification Service for Sustainable Investments in Perú (“SENACE”) to amend its environmental permit and further increase annual mill processing capacity at Constancia. The approval was received in late June and represented the fifth environmental permit amendment at Constancia. The amended permit increases the processing capacity of the Constancia mill to 34 million tonnes of ore per annum from the previously permitted 31 million tonnes per annum. In March 2026, Hudbay received permit approval to increase mill throughput capacity to 31 million tonnes from 29.9 million tonnes per annum. As part of the Company’s continuous improvement efforts, the updated permit enables additional capacity to further optimize Constancia’s operations and deliver strong copper production. Hudbay’s efforts to increase mill throughput align with the Peru Ministry of Energy and Mines’ regulatory framework, which permits operational flexibility to operate up to 10% above nominal daily capacity. Hudbay achieved total ore processed of 30.3 million tonnes and 31.9 million tonnes in 2025 and 2024, respectively. With this permit amendment, Hudbay now has a steady-state capacity of 34 million tonnes per annum, while maintaining the standard operational flexibility to handle daily increases of up to 10% above permitted levels. The environmental permit amendment also approves further optimization of the mine plan, extends the operational life of Constancia, and incorporates the implementation of additional infrastructure to improve tailings transport infrastructure and water management systems. Forward-Looking Information This news release contains forward-looking information within the meaning of applicable Canadian and United States securities legislation. All information contained in this news release, other than statements of current and historical fact, is forward-looking information. Often, but not always, forward-looking information can be identified by the use of words such as “plans”, “expects”, &#x20...

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