Sun Summit Reports Significant High-Grade Gold, Silver and Copper Mineralization from Rock Samples Across the JD Project, Toodoggone District

Sun Summit Minerals Corp. (the "Company") reported new assay data from recently completed geological mapping and prospecting surveys across its JD Project in British Columbia's Toodoggone District. The news highlights the discovery of a "very high-grade zone of copper-silver mineralization" from selective rock samples. The Company also noted the presence of gold-silver mineralization. These findings are expected to significantly aid in the definition of future drill targets, complementing the interpretation of 2025 IP surveys. A total of 650 rock samples were collected, with results for 532 samples still pending. The news also explicitly stated that assay results from the 2025 drilling program (20 drill holes, 6864m completed) are still pending.

This news is a routine but positive update on ongoing exploration activities. The discovery of "very high-grade" copper-silver and gold-silver mineralization from surface rock samples on the JD Project is encouraging, as it confirms the project's prospectivity and provides new targets for future, more definitive, drill programs. This aligns with the Company's stated strategy to systematically explore and define targets at JD.

However, the impact is not considered "Material - Game Changer" because these are selective rock samples, which inherently carry a disclaimer that they "may not reflect true mineralization". The market typically assigns lower weight to surface samples compared to drill results, especially in the absence of a confirmed resource. The highly anticipated assay results from the 6,864 meters of drilling completed at JD (announced as completed on October 14, 2025, with assays pending) are still outstanding. These drill results are expected to be the more significant catalysts for the Company, as they would provide concrete evidence of subsurface mineralization continuity and grade.

This news confirms progress on target generation and reinforces the potential of the JD Project, but it does not materially de-risk the project or provide a definitive measure of economic viability. It's a positive step in the exploration process, indicating that the Company's boots-on-the-ground work is yielding promising indications for future drilling, but it is not the most significant data point expected.

Sun Summit Minerals Corp. is a Canadian junior mineral exploration company focused on the discovery, expansion, and advancement of district-scale gold and copper assets in British Columbia. The Company has three main projects: - JD Project: Located in the Toodoggone Mining District of north-central British Columbia, this project spans over 15,000 hectares. It is characterized by high-grade epithermal gold and silver mineralization, as well as porphyry-related copper and gold mineralization. The project has seen aggressive exploration, including significant drilling in 2024 and 2025, and boasts a 12-kilometer trend of porphyry-related targets. - Buck Project: Situated near Houston, B.C., this 100%-owned project recently announced an inaugural Mineral Resource Estimate (MRE) at its Buck Main deposit (January 28, 2025 effective date). It features an intermediate-sulfidation, epithermal-related gold-silver-zinc system, with both bulk-tonnage and high-grade vein-hosted mineralization. The MRE reported 1.15 Mt Indicated @ 0.519 g/t AuEq (19.1 koz AuEq) and 52.2 Mt Inferred @ 0.489 g/t AuEq (820.4 koz AuEq) at a 0.25 g/t AuEq cutoff. - Theory Project: Also located in the Toodoggone Mining District, approximately 10 kilometers from JD, this project was acquired via an option agreement with Eagle Plains Resources Ltd. It adds nearly 10,000 hectares to Sun Summit’s Toodoggone footprint, creating a combined 25,000-hectare land package. It shows potential for both epithermal-related gold and large bulk-minable porphyry-related copper-gold targets based on historical data and initial 2025 exploration.

The Company's strategy involves systematic exploration with a focus on target advancement, generation, and discovery, aiming to capitalize on the prospectivity of British Columbia's mining regions.