Sunstone Metals Online Annual Report 2025

1. Prioritise value realisation The porphyry projects at Bramaderos and El Palmar have the potential to evolve into multi-decade goldcopper mining centres. At Bramaderos, the Limon epithermal deposit has been prioritised as a potential near-surface high-grade gold-silver development opportunity. This strategy allows for a scalable operation to be established first before developing the much larger porphyry gold-copper-silver opportunities at Bramaderos. The Company continues to evaluate potential new funding pathways and opportunities to continue to grow our business in Ecuador, where clear shareholder value can be demonstrated. It is also evaluating potential partnerships for its projects where this may maximise the value of the portfolio. 2. Track Record The team at Sunstone has been involved in significant discoveries of porphyry and epithermal copper-gold mineralisation at Tujuh Bukit in Indonesia and Cascabel in Ecuador, and the successful development of the King of the Hills Gold Mine in Western Australia and Koniambo Nickel Mine and Smelter in New Caledonia. The Company has the necessary skill sets to execute Tier 1 projects and is well-placed to repeat that success at Bramaderos and El Palmar. 3. Excellent infrastructure All projects are supported by established infrastructure by being close to power, road infrastructure and ports. 4.Community support The Board and Management Team take their responsibilities to the host communities seriously and have endeavoured to implement the highest ESG standards throughout our business. Sunstone released its inaugural Sustainability Report in 2023, which details the level of support and engagement with local communities and project stakeholders. Overview Operating Review continued 5 Sunstone Metals Limited Annual Report 2025

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