Southern Silver Intersects 10.5 metres averaging 1,115g/t AgEq at Cerro Las Minitas Project in Durango, Mexico

On December 1, 2025, Southern Silver reported the first assay results from its ongoing drill program on the recently acquired Puro Corazon claim at its flagship Cerro Las Minitas Project in Mexico. The highlight intercept from drill hole 25CLM-203 was a bonanza-grade interval of 10.5 metres (estimated true thickness) averaging 1,115 g/t silver equivalent (AgEq), which included 560 g/t silver, 11.2% lead, and 12.3% zinc. The company has completed approximately 4,000 metres of a planned 12,000-metre program and expects more results through the first quarter of 2026. The results will be used to update the project's Mineral Resource Estimate and Preliminary Economic Assessment (PEA).

The drill results are materially positive and serve as a powerful validation of the company's strategy to acquire the Puro Corazon claim. The historical timeline shows a clear and well-executed plan: - September 17, 2025: The company announced the acquisition of the Puro Corazon claim, a key inlier within the main Cerro Las Minitas project, stating it would unlock synergies and provide faster access to near-surface, high-grade mineralization. - October 6, 2025: The company promptly initiated the planned 12,000-metre drill program to test this thesis. - December 1, 2025: Today's news delivers on that promise. The intersection of 10.5 metres of over 1,100 g/t AgEq is an exceptional result that confirms the presence of high-grade, wide mineralization exactly where anticipated.

This is not a grassroots discovery but a confirmation of high-grade potential on a known, historically mined structure that the company now controls. The result significantly de-risks the acquisition and provides a strong indication that the integration of Puro Corazon can materially enhance the overall project economics, just as management projected. By hitting such strong mineralization in the initial holes of a larger program, the company has set a very positive tone and raised expectations for the remaining 8,000 metres of drilling. The market should react very favorably to this news, as it demonstrates management's ability to execute a value-accretive strategy from financing, to acquisition, to exploration success.

Southern Silver Exploration Corp. is a Canadian-based exploration and development company focused on its flagship Cerro Las Minitas (CLM) polymetallic silver-lead-zinc project in Durango, Mexico. CLM is a large-scale carbonate replacement deposit (CRD). The company's recent strategic focus has been the acquisition and exploration of the Puro Corazon claim, a 9-hectare inlier within the main CLM project area that was previously privately operated and has known high-grade mineralization. The company also holds other exploration properties in Mexico and the United States.