• Simberi Sulphide Expansion Project confirmed for 200+kozpa over 13-year mine life
• Atlantic Development Projects to become 100kozpa Processing Hub
• Mining Lease extension and PNG tax assessment resolution progressing

St Barbara Ltd's September Investor Presentation provides an update on its key operations and development projects. The Simberi Sulphide Expansion Project is confirmed to have the potential for over 200kozpa gold production over a 13-year mine life, with initial project capital estimated at US$235 million. The company is targeting a Final Investment Decision between late 2025 and early 2026, subject to resolving the amended tax assessments from the PNG tax authority. In Atlantic, the company is progressing the 15-Mile Processing Hub concept, which will utilize the relocated Touquoy mill and potentially process ore from the Beaver Dam and Cochrane Hill projects. The 15-Mile Pre-Feasibility Study is being updated to incorporate these projects, with completion expected in Q1 2026. The permitting environment in Nova Scotia has improved, with the government designating gold as a Provincial Strategic Mineral and creating a specialist permitting team. St Barbara is also investigating options to re-open the Touquoy Mine to process remaining low and medium grade stockpiles. The company continues to assess separation options for its Atlantic operations ahead of the Simberi Final Investment Decision.

St Barbara is focused on advancing the Simberi Sulphide Expansion Project and the Atlantic Development Projects in the coming year. Key priorities include securing the Simberi Mining Lease extension, resolving the PNG tax assessment, completing the Feasibility Study update for Simberi, and finalizing the 15-Mile Processing Hub Pre-Feasibility Study. The company is targeting a Final Investment Decision on the Simberi Expansion between late 2025 and early 2026.