Bunker Hill Mining (BNKR) Corporate presentation summary

Project status and development

• Project is 90% complete and on track for first production in H1 2026, with phased commissioning underway.

• Expanded land package now totals 6,283.7 acres, making it the largest in the Silver Valley.

• Processing plant and tailings filter plant construction are progressing, with commissioning scheduled before production.

• The 1,800 tpd processing facility is over 90% complete and designed for future expansion to 2,500 tpd.

• Bunker 2.0 expansion targets 2,500 tpd throughput, supported by a $150M US EXIM Bank LOI.

Operational advantages and cost structure

• Located in a premier US mining jurisdiction with 100% private land and 406 patented claims.

• Portal access to shallow mineralization enables low-cost, mechanized underground mining.

• Low-cost power ($0.06/kWh), highway access, and proximity to Trail Smelter reduce logistics costs.

• Positioned on the lower half of the zinc cost curve, with significant optimization opportunities.

• In-house mining, legacy infrastructure, and supportive community contribute to cost efficiency.

Resource base and expansion potential

• Measured & Indicated resources: 7.0 Mt @ 1.00 opt Ag, 2.40% Pb, 5.44% Zn; Inferred: 6.9 Mt @ 1.52 opt Ag, 2.87% Pb, 4.96% Zn.

• Probable reserves: 3.2 Mt @ 1.12 opt Ag, 2.59% Pb, 5.81% Zn.

• Expansion plan aims to extend mine life and restore a 50/50 silver-base metals revenue mix.

• Significant increase in free cash flow projected as higher-grade silver is mined in later years.

• Substantial exploration upside with most of the 2,300-hectare land claim package underexplored.