Bunker Hill Mining (BNKR) investor relations material

Company overview and business model

• Focused on developing and restarting a 100% owned flagship asset, the Bunker Hill Mine in Idaho, historically a major silver and base metals producer with over 165 million ounces of silver and 5 million tons of base metals produced between 1885 and 1981.

• Transitioned from mineral exploration to development, with mine restart planned for mid-2026, subject to securing additional financing.

• Owns mineral rights to 440 patented mining claims covering over 5,700 acres, with significant infrastructure and surface rights.

• Operations are subject to extensive environmental and regulatory oversight, including ongoing obligations under EPA settlement agreements.

• Business model centers on producing zinc, lead, and silver concentrates for sale to established offtake partners.

Financial performance and metrics

• Completed major balance sheet restructuring in 2025, converting debt to equity and modifying royalty and stream financing arrangements.

• Raised significant capital through private placements in 2025 and 2026, including C$33.8M in March 2026 and $37.4M in September 2025.

• As of June 23, 2026, 46,685,293 shares of common stock were outstanding.

• Drew multiple tranches on debt facilities and silver loans, with interest rates ranging from 13.5% to 15% and various maturity dates through 2030.

Use of proceeds and capital allocation

• Net proceeds from securities offerings will be used for development of mineral properties, acquisitions, working capital, debt repayment, and general corporate purposes.

• Recent equity raises primarily support construction, start-up, and ramp-up of the Bunker Hill Mine.

• Proceeds also used for land acquisitions and settling outstanding payables with creditors and contractors.