RUA GOLD Files the Preliminary Economic Assessment for the Auld Creek Project

Executive Summary

• Rua Gold Inc. announced the filing of a Preliminary Economic Assessment (PEA) for its Auld Creek Gold Antimony Project in New Zealand's Reefton Goldfield.
• The PEA introduces a revised Mineral Resource Estimate (MRE) based on Mineable Stope Optimiser (MSO) shapes, resulting in a 22-27% decrease in AuEq ounces compared to the May 2026 MRE.
• The resource adjustment reflects updated geotechnical, engineering, and economic factors, including partial crown pillar extraction, applied to meet reasonable prospects for eventual economic extraction (RPEEE) criteria at the PEA stage.

Key Details

• Project Location: Auld Creek Gold Antimony Project, Reefton Goldfield, West Coast, New Zealand.
• Report Filing: Preliminary Economic Assessment (PEA) Technical Report filed and publicly available on SEDAR+ and the company website.
• MRE Adjustment: The final MSO set presented in the PEA (Table 14-21) shows a -22% to -27% change in AuEq ounces relative to the Mineral Resource Estimate disclosed in the May 5, 2026 press release.
• Reason for MRE Change: Adjustment driven by the consideration of additional geotechnical, engineering, and economic factors, specifically the partial extraction of a crown pillar, to satisfy RPEEE criteria at the PEA level.
• Qualified Persons (NI 43-101):
• Abraham Whaanga (RSC): Reviewed and verified resource-related information.
• Gary Davison (Mining One Consultants): Reviewed mining methods, mining capital/operating costs, and economic analysis.
• Marius Phillips (Pitch Black Group): Responsible for plant capital/operating costs, mineral processing, and metallurgical testing/recovery methods.
• Simon Henderson (COO & Director, Rua Gold): Reviewed and approved technical disclosure, verified drill program data, sampling, analytical/test data, and QA/QC procedures.
• Company Asset Context: Rua Gold controls the Reefton Gold District as the dominant landholder with over 120,000 hectares of permits in a district that historically produced over 2Moz of gold grading 9-50g/t. The company also holds the Glamorgan Project in the Hauraki District, a region with historical production of 15Moz gold and 60Moz silver.
• Technical Reference: Full details regarding the factors considered for the MRE adjustment are provided in Section 14.10 of the PEA Technical Report.