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FORTUNA MINING CORP.

For the period ended Dec 31, 2024. Filed Mar 27, 2025.

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The yearly report of certain Canadian companies, filed under a joint US and Canadian system. It is the main yearly account these companies give US investors, largely as filed in Canada.

FY2024 · Filed Mar 27, 2025

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FSM$9.62+1.5%Stored close · as of Nov 6, 2026
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Contents

EX-99.1 · 2024 Developments

2024 Developments

The expansion of the leach pad at the Lindero Mine which began in 2024 was the Company’s largest capital expenditure project during the year, with the Company investing $38.7 million in the project in 2024. The leach pad was designed for approximately 93 million tonnes of ore when considering an average bulk density of 1.60 t/m3, and will cover approximately 106 hectares of lined surface. The leach pad is being constructed over three phases. The first phase which covers approximately 49 hectares is complete. Construction on Phase 2 began in 2024 and will increase the total surface by approximately 45 hectares to approximately 94 hectares. The mine started placing the first lift of ore on the new leach pad expansion area in the second half of October 2024. As at December 31, 2024, Phase 2 of the leach pad expansion project was approximately 89% complete, and the project will complete during the first half of 2025. Detailed engineering for Phase 3 of the leach pad which will cover 12 hectares is expected to start in the next two to three years.

On February 8, 2024, the Company announced its target to reduce Scope 1 and Scope 2 GHG emissions by 15% in 2030 compared to “business as usual” forecast GHG emissions if no intervention measures were taken.

In alignment with the Company’s commitment to reduce GHG emissions, in 2024 the Company began the construction of three significant projects:

●a solar plant at the Lindero Mine. The project is expected to result in the development of a Photovoltaic plant and a battery energy storage system, which will be incorporated into the existing diesel generation plant forming a hybrid electric power generation plant. The plant will prioritize the generation of renewable electric energy. As at December 31, 2024, the construction of the solar plant was 44 percent completed, and it is expected to start production in the second half of 2025.
●the construction of a 6 mega watt photovoltaic solar plant at the Séguéla Mine to provide power during daylight hours and reduce consumption from the grid. The plant is intended to produce up to 30 percent of the mine’s energy requirements. The plant is expected to provide operational cost savings and contribute to the reduction of GHG emissions for the mine. As at December 31, 2024, the project was in the engineering stage and was 25 percent completed. It is expected that the solar plant will be commissioned in the fourth quarter of 2025.
●the construction of a new cyclone plant at Caylloma. The purpose of the plant is to separate fine and coarse tailings. Coarse tailings will be pumped to the top of the mine area, which will then be used to backfill underground mine workings. Fine tailings will be sent to a tailings storage facility for storage. The cyclone plant will save operational costs, improve safety during operations and reduce GHG emissions by avoiding the use of trucks to haul coarse tailings. The construction of the plant is nearing completion, and is expected to begin operations in the second quarter of 2025.

On April 1, 2024, the Company exercised its right to acquire one-half of the 1.2% net smelter return royalty at the Séguéla Mine for $10.0 million Australian Dollars pursuant to a royalty agreement with Franco Nevada Corporation dated March 30, 2021.

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