Sunshine Silver Mining & Refining (SSMR) Corporate presentation summary

Strategic positioning and asset overview

• Operates in Idaho's Silver Valley, holding North America's highest-grade primary silver resource with significant exploration upside and a generational mine life potential.

• Sunshine Mine boasts 103.9Moz indicated and 159.8Moz inferred silver resources at high grades, with a projected 24-year mine life.

• Expected to be the second-largest primary silver producer in the U.S. based on first five years' production.

• Holds the largest mineral rights position in the Silver Valley, supporting district-scale exploration.

Operational readiness and infrastructure

• Major permits are in place, including water and tailings storage facility approvals, supporting restart readiness.

• Existing infrastructure includes shafts, tunnels, and storage facilities, enabling efficient project ramp-up.

• A vertically integrated critical minerals complex is planned, including a future antimony plant and silver-copper refinery.

Exploration and drilling progress

• Ongoing 50,000-meter infill underground drilling program supports resource conversion for a 2027 feasibility study.

• Recent drill results show multiple intercepts exceeding 1,000 g/t silver, highlighting high-grade zones.

• District-wide exploration is underway, leveraging expanded land position.