Dakota Gold (DC) investor relations material

Project overview and strategic focus

• Advancing Richmond Hill as the foundation for organic growth, with Maitland as a secondary focus in the historic Homestake District.

• Richmond Hill and Maitland projects aim to elevate South Dakota’s gold production ranking nationally.

• Richmond Hill is located near the historic Homestake Mine and adjacent to the Wharf Coeur Mine, leveraging existing infrastructure and regulatory familiarity.

Resource estimates and mine planning

• Updated S-K 1300 resource and cash flow analysis completed, using $2,350/oz gold and $29/oz silver prices.

• M&I resource exceeds 160 million tons at 0.566 g/t gold; focus is on advancing to reserve category.

• Mine life projected at 17–28 years, with plans to increase daily mining rate from 30,000 to up to 60,000 tons.

• Annual production targets 153,000 oz gold and nearly 500,000 oz silver, with robust project economics.

Operational and financial highlights

• All-in sustaining costs expected to be similar to Wharf Mine, with well-defined capital costs and a $50 million contingency.

• Net present value estimated at over $4 billion at current metal prices, with initial years producing up to 170,000 oz gold annually.

• Expansion of mining rate would accelerate gold production and enhance project economics.