Mr. Richard Williams reports

BUNKER HILL MINING STRENGTHENS EXECUTIVE TEAM AND ACHIEVES IMPROVED ESG RATING IN LATEST DIGBEE ASSESSMENT

Bradley Barnett has been appointed chief financial officer of Bunker Hill Mining Corp., effective immediately, and Mark Hayes has been appointed general counsel, effective Aug. 10, 2026. Mr. Barnett has been serving the company as interim chief financial officer and will now assume the role on a permanent basis.

Mr. Barnett has played a key role in supporting the company's financial operations during a transformative period for Bunker Hill, including the advancement of redevelopment and commissioning activities at the historic Bunker Hill mine. His appointment reflects the company's board of directors' confidence in his leadership, financial expertise and continuing contribution to the company as it transitions toward production.

"Brad, one of the three founding members of the new management team that arrived in the Silver Valley in 2020 to transform Bunker Hill's future, is a proven and highly capable mining executive. As interim chief financial officer, he has demonstrated strong financial leadership, exceptional commercial acumen and the ability to build a superb performance-focused partnership with the operating team," said Richard Williams, executive chairman of Bunker Hill. "We are very pleased to appoint him as chief financial officer on a permanent basis and look forward to his continued contribution as we execute on our production restart and long-term growth strategy."

Bunker Hill is also pleased to announce the appointment of Mr. Hayes as general counsel, effective Aug. 10, 2026. Mr. Hayes joins Bunker Hill with more than a decade of legal and strategic experience focused on the mining, natural resources and energy sectors. Most recently, he served as head of legal for Nuton, Rio Tinto's innovative copper leaching technology venture, where he advised executive leadership on strategic investments, governance matters, commercial agreements, environmental and regulatory issues, and intellectual property management across a portfolio of mining projects throughout the Americas.

Prior to Nuton, Mr. Hayes held several senior legal positions within Rio Tinto's copper and borates businesses, supporting major mining operations and growth initiatives throughout North and South America. His experience includes mergers and acquisitions, project development, environmental permitting, regulatory compliance, commercial negotiations, joint ventures, and corporate governance. Before joining Rio Tinto, Mr. Hayes served as a public lands attorney with the U.S. Department of the Interior and practiced natural resources and environmental law with McAfee & Taft.

"Mark's appointment comes at a key time for Bunker Hill as we advance towards commercial production and evolve our long-term growth strategy," said Richard Williams, executive chairman of Bunker Hill. "His combination of operational mining experience, transactional expertise and regulatory knowledge gained through leadership roles at Rio Tinto will be invaluable as we build a modern, responsible and profitable mining company. We are very excited to welcome Mark to our team."

Mr. Hayes added: "Bunker Hill represents one of the most compelling mine restart stories in North America. The opportunity to help guide the company through this next phase of production and growth, while contributing to the revitalization of one of the world's most historic mining districts, is incredibly exciting. I look forward to working with the management team and board to support Bunker Hill's continued success."

Mr. Hayes earned a juris doctor, magna cum laude, from the University of Oklahoma College of Law and holds a bachelor of arts in politics from Princeton University, where he was a four-year varsity football letterman and All-Ivy selection. He is admitted to practice law in Utah and Oklahoma and has also completed executive business studies in mergers and acquisitions.

Award of A grade in Digbee ESG assessment

The results of Bunker Hill's latest independent ESG (environmental, social and governance) assessment of its operations and corporate governance system, conducted by Digbee Ltd., a leading technology platform specializing in ESG disclosure and benchmarking for the mining sector, have been published.

In its fourth Digbee review -- and its first conducted under the operations phase analysis framework, Bunker Hill achieved an overall ESG score of A (range: B to AAA) as of April, 2026, representing a significant improvement over the company's previous assessment.

The assessment reflects the positive way that the company integrates ESG principles into all aspects of its operations, governance and long-term strategy. As with previous Digbee reports, the advice provided by Digbee assists the company in advancing and developing this approach further, helping it to achieve the coveted AAA grade in the future.

A landmark mine restart in the United States

The historic Bunker Hill mine, located in Idaho's prolific Silver Valley is advancing now toward commercial production. The restart of this mine after 45 years of closure and remediation represents the first mining operation to restart commercial mining within an active U.S. EPA Superfund-designated cleanup site since the establishment of the Superfund program in 1969. This represents a significant milestone for both the company, the broader U.S. mining industry, and the community of the Silver Valley.

Responsible redevelopment with long-term community benefits

The Bunker Hill mine redevelopment includes:

• Remediation and modernization of historic infrastructure;
• Installation of modern processing and environmental systems;
• In-mine water treatment and milling infrastructure;
• Filtered tailings technology;
• Placement of tailings underground to reduce long-term surface impacts.

The mine is expected to directly employ between 200 and 250 people once commercial production is reached, with indirect employment estimated at approximately 1,000 jobs throughout the region. Most employees and contractors are expected to be drawn from local communities within Idaho's Silver Valley and surrounding areas.

Positioned to supply essential metals from within the U.S.

The Bunker Hill mine produces silver, zinc and lead concentrates from Idaho's prolific Coeur d'Alene mining district -- a significant historic silver-producing region in the United States and the supplier of some of its best underground miners.

As the U.S. prioritizes domestic industrial capacity and secure supply chains, Bunker Hill is positioned to play its part as an American producer of both precious and industrial metals via the responsible restart of a historic mining operation.

Commitment to ESG leadership

Digbee's assessment highlighted the company's experienced leadership team, strengthened governance framework and continued enhancement of corporate policies and operational standards.

Bunker Hill remains focused on:

• Operational excellence;
• High standards of environmental stewardship;
• Work force safety;
• Community engagement;
• Transparent governance practices.

As the Bunker Hill mine advances now toward commercial production making use of modern technology, practices and systems, it aims to maintain the highest standards of operational excellence in all matters, including environmental management. Partnered with the community of the Silver Valley, and alongside those other local mining companies that are investing in operations nearby, it seeks to play an important part in offering skilled, well paid and modern employment in a revitalizing domestic United States mining industry: delivering critical metal into the U.S. supply chain, creating long-life, dynamic United States jobs and in ways that protect and enhance the environment around it.

About Bunker Hill Mining Corp.

Bunker Hill Mining is a U.S.-based development company focused on the restart of its flagship asset -- the historic Bunker Hill mine in northern Idaho's prolific Coeur d'Alene mining district. This renowned silver, zinc and lead deposit is advancing toward commercial production using modern exploration techniques and responsible development practices to unlock its full potential.

The company's strategy is centred on efficiently revitalizing this high-quality asset to deliver long-term value, while upholding strong environmental and operational standards. Bunker Hill is committed to maximizing shareholder returns through the disciplined redevelopment of one of North America's most storied mining operations.

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