• Optimised mine plan for the Finniss Lithium Operation, delivering first ore within 1 month of mobilisation, and reducing Grants pre-production capital by $35 - $45 million
• Grants will now be initially mined as an open pit and will transition later to an underground mine
• Grants Ore Reserve Estimate increases by 33% to 1.53Mt @ 1.42% Li2O, delivering a 44% lift in contained Li2O metal

Core Lithium Ltd (ASX: CXO) is pleased to provide an updated Reserve for the Grants deposit at its 100%-owned Finniss Lithium Project. Since releasing the Finniss Restart Study in May 2025, the Company has continued to refine its operating plan for Finniss. Based on the outcomes of an updated geotechnical assessment for the Grants deposit, an opportunity to bring forward revenue and reduce Grants pre-production capital costs has been identified. Grants will now be initially mined as an open pit and will transition later to an underground mine. This will reduce the re-establishment costs for Grants and bring first ore and revenue forward. The estimated reduction in Grants pre-production capital is $35 to $45 million. The updated Ore Reserve for Grants has been completed based on this revised plan, delivering a 33% increase in overall tonnage and an increase in contained metal of 44%. The declaration of an upgraded Ore Reserve at Grants leverages the substantial body of study work that has been conducted. The Ore Reserve Estimate and related assumptions were developed and supported by independent consultants in conjunction with Core's Competent Persons.

The Grants Ore Reserve Estimate has increased by 33.0% to 1.53Mt @ 1.42% with a 44% increase in contained metal to 22kt Li2O.