Mr. Sam Ash reports

BUNKER HILL SHIPS FIRST CONCENTRATE TO TRAIL SMELTER AND ANNOUNCES DRAWDOWN OF STANDBY FACILITY

Bunker Hill Mining Corp. has made the first shipment of concentrate to Teck Resources Ltd.'s Trail smelter.

"With the successful commissioning of our new 1,800-ton-per-day processing plant, the Bunker Hill team is proud to have begun generating revenue from the sale of concentrate for the first time since the Bunker Hill mine ceased operations more than 45 years ago," said Sam Ash, president and chief executive officer of Bunker Hill. "This represents a defining milestone in the company's redevelopment and validates the dedication of our team in safely bringing one of America's most historic mining operations back into production. While we continue to optimize plant performance through commissioning, we remain focused on achieving full commercial production by year-end."

Concentrate shipment milestone

The locally recruited Bunker Hill operations team is completing the final phases of commissioning the company's newly constructed processing plant and associated tailings filter press to the point where the facility can operate on a 24-hour, seven-day-a-week basis.

The rapid progression from construction through commissioning reflects the quality of the engineering, construction and commissioning program led by Bunker Hill's team, together with key project partners including Gypsy Life LLC, Ausenco, Mountain West Industrial, Metso Corp. and numerous local contractors.

As is typical during the ramp-up of a new processing facility, the company expects to continue optimizing plant performance and implementing routine operational refinements as it advances toward full commercial production, targeted by the end of 2026. Management remains confident in the operation given the quality of the plant construction, the successful commissioning achieved to date and the experience of the operating team. The commencement of concentrate production marks a significant step in the successful restart of the Bunker Hill mine following more than four decades of closure and rehabilitation.

Concentrate produced at Bunker Hill is analyzed by Silver Valley Analytical Inc. before being transported approximately 140 miles (220 kilometres) to Teck's integrated lead and zinc smelting complex in Trail, B.C., where it is processed under the company's offtake arrangements.

Processing plant

The Bunker Hill processing plant is in Kellogg, Idaho, approximately 3.5 miles (5.6 kilometres) from the underground mine portal at Wardner. Designed to process 1,800 tonnes per day, the facility incorporates modern crushing, grinding and differential flotation circuits to produce separate lead and zinc concentrates for sale.

Flotation tailings are dewatered using a state-of-the-art filter press, with the resulting filter cake either incorporated into underground paste backfill or placed in the company's dry-stack tailings storage facility. This approach reduces water consumption, minimizes environmental impact and supports safer, more efficient underground mining operations.

The processing facility is the one of the largest and most modern mills in Idaho's historic 25-mile-long Silver Valley. It exceeds the processing capacities of nearby operations, including Hecla Mining's Lucky Friday mine (1,100 tpd) and Americas Gold and Silver's Galena mine (500 tpd), positioning Bunker Hill as a significant processing asset within the district.

Importantly, the plant has been designed with future growth in mind and can be expanded to approximately 2,500 tons per day with relatively modest incremental capital, providing flexibility as additional mineral resources are converted into minable reserves and incorporated into future mine plans.

Construction of the paste backfill plant at the Wardner mine site is substantially complete, and final commissioning is expected within the next three weeks. Once operational, the facility will provide paste backfill to underground mining operations, improving mining efficiency, supporting ground stability and enhancing overall mine productivity.

Drawdown of standby facility

Bunker Hill announces that it has drawn $5-million (U.S.) under its existing standby facility, provided to the company by Teck, together with its affiliates, providing additional financial flexibility, as the company continues the ramp-up of operations at the Bunker Hill mine in Kellogg, Idaho.

The proceeds from the drawdown will be used to support working capital requirements and continuing operational activities as the company advances toward full commercial production.

"This drawdown provides additional liquidity at an important stage in our ramp-up," said Mr. Ash. "With the processing plant operating, concentrate shipments under way and production continuing to increase, this facility strengthens our balance sheet and provides additional flexibility as we execute our operating plan and work toward achieving commercial production."

The standby facility forms part of the company's broader financing strategy and is intended to provide additional capital flexibility during the initial years of operations. The company continues to prudently manage its liquidity while focusing on safely increasing production, optimizing plant performance and generating sustainable cash flow.

About Bunker Hill Mining Corp.

Bunker Hill is a United States-based mining company focused on the restart and operation of its flagship asset, the historic Bunker Hill mine in northern Idaho's prolific Silver Valley. One of North America's most storied mining districts, the Bunker Hill mine is being redeveloped as a modern producer of zinc, lead and silver concentrates through responsible mining practices and a disciplined approach to operational execution.

The company's strategy is centred on creating long-term value through the efficient restart, optimization and expansion of this high-quality asset while maintaining strong environmental stewardship, safety performance and community engagement. Bunker Hill is committed to delivering sustainable growth and maximizing shareholder returns by redeveloping a cornerstone mining operation in the United States.

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