Endeavour Silver (EXK) investor relations material

Company overview and asset portfolio

• Over 20 years of operations, focusing on acquiring and developing underexplored mines in Mexico and Peru.

• Key assets include Guanacevi, Bolañitos, Terronera (Mexico), Kolpa (Peru), and Pitarrilla (Mexico).

• Emphasis on extending mine life and lowering costs through exploration and operational improvements.

• Pitarrilla is one of the world's largest undeveloped silver assets, with a feasibility study underway.

Kolpa integration and performance

• Acquired Kolpa in May 2025 for $145 million, viewed as a value purchase with strong expansion potential.

• Integration benefited from existing local management and infrastructure, enabling a smooth transition.

• Expansion to 2,500 tons per day completed in March, exceeding expectations and maintaining operational stability.

• Ongoing exploration aims to confirm a historical resource of 120 million silver equivalent ounces.

Terronera ramp-up and operational highlights

• Terronera entered commercial production in October 2025, focusing initially on low-grade ore to optimize plant performance.

• Plant optimization improved silver recoveries, now approaching the feasibility target of 89%.

• Transitioned to LNG power and received a waste dump permit, reducing costs and improving efficiency.

• Resolved a brief community blockade by negotiating additional land use and compensation.