Dakota Gold (DC) investor relations material

Strategic focus and project overview

• Revitalizing the historic Homestake District in South Dakota with a focus on responsible gold exploration and development.

• Principal assets include the Richmond Hill Gold Project (development stage) and Maitland Gold Project (exploration stage), both on private land with existing infrastructure.

• Over $100 million invested locally from 2019–2024, with a strong commitment to health, safety, and environmental standards.

• Funded through feasibility with a $107M cash balance as of March 31, 2026.

Richmond Hill Gold Project highlights

• S-K 1300 heap leachable resource: 3.65 Moz measured & indicated (M&I) gold, 2.61 Moz inferred gold, 38.1 Moz M&I silver, 22.8 Moz inferred silver.

• Combined heap leach and mill resource: 4.64 Moz M&I gold, 5.06 Moz inferred gold, 47.8 Moz M&I silver, 52.1 Moz inferred silver.

• Initial Assessment (IACF) outlines robust economics: after-tax NPV (5%) up to $2.1B, IRR up to 59%, 17–28 year mine life, LOM AISC ~$1,050/oz.

• Targeting annual gold production of 142,000–153,000 oz, with production as soon as 2029.

• Project leverages existing power, road access, and a local labor pool.

Exploration and resource expansion

• 2025–2026 drill campaigns added ~30% new data, with 46,552 meters drilled across 354 holes.

• Drilling confirmed near-surface, high-grade zones and extended mineralization north and northeast of the current mine plan.

• Expansion drilling yielded high-grade intervals, including 11.36 g/t Au over 26.3m and 5.0 g/t Au over 24.9m.

• Resource remains open in multiple directions, with ongoing infill and step-out drilling to convert inferred to indicated resources.