REG - Guardian Metal Res. - Dr. Mark Thorpe appointed to the Board

Guardian Metal ResourcesAnnouncement

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RNS Number : 1712F  Guardian Metal Resources PLC  21 May 2026

21 May 2026

Guardian Metal Resources plc

('Guardian Metal' or the 'Company')

Dr. Mark Thorpe appointed to the Board

Guardian Metal Resources plc (NYSE.A: GMTL, LON:GMET, OTCQB:GMTLF), a
strategic exploration company focused on tungsten in Nevada, USA, is pleased
to announce that Dr. Mark Thorpe is to be appointed to the Board as an
Independent Non-Executive Director, subject to completion of the required AIM
due diligence process.

Dr. Thorpe brings to Guardian Metal decades of experience as a senior mining
executive. He is a sustainability specialist with more than 30 years of
experience working for major mining companies, focussed on environmental,
permitting and community engagement initiatives, across the global mining
sector. His experience covers the entire mine life cycle from greenfield
exploration through to mine closure and post-closure management, which makes
him well qualified to support Guardian Metal as it advances its Nevada-based
tungsten projects through key development phases and into production. He holds
a Ph.D. in mine land rehabilitation from the University of Saskatchewan and
was the Chair of the Board of Directors of the Canada Mining Innovation
Council.

Dr. Thorpe is replacing Mr. Mark Burnett, who steps down from his role as
Non-Executive Director on 21 May 2026. The Board would like to thank Mark
Burnett for his significant contribution as an original director of Guardian
Metal and for helping to build the Company from a small private company into a
notable dual-listed business in London and New York over the past five years.
He steps down to focus on other business interests.

J.T. Starzecki, Executive Chairman of Guardian Metal, commented:

"Dr. Mark Thorpe's appointment to the Board as Independent Non-Executive
Director is an exciting and important step in Guardian Metal's evolution as we
look to reshore U.S. mined tungsten supply for the first time in over a
decade. Mark is widely recognised as a leader in his field, setting best
practice industry standards for global mining companies in responsible mining,
environmental, permitting and stakeholder relations. We are delighted to
appoint someone of his calibre and welcome his leadership and expertise as we
approach important development milestones to deliver on our strategy of
establishing our tungsten projects as cornerstones of U.S. tungsten supply.

"I would like to thank Mark Burnett for his dedicated service and the
significant contribution he has made to the Board of Directors and Guardian
Metal over the last five years. He is leaving the Company with our best wishes
for the future."

A further announcement, including regulatory disclosures, will be made in due
course.

 

For further information visit www.Guardianmetalresources.com
(http://www.goldenmetalresources.com) or contact the following:

 Guardian Metal Resources plc                 Tel: +44 (0) 20 7583 8304

 Oliver Friesen (CEO)
 Cairn Financial Advisers LLP                 Tel: +44 (0) 20 7213 0880

 Nominated Adviser

 Sandy Jamieson/Jo Turner/Louise O'Driscoll
 Berenberg                                    Tel: +44 (0) 20 3207 7800

 Joint Broker and Financial Adviser

 Jennifer Lee/Ivan Briechle
 Tamesis Partners LLP                         Tel: +44 (0) 20 3882 2868

 Joint Broker

 Charlie Bendon/Richard Greenfield
 Tavistock                                    Tel: +44 (0) 7920 3150 /

                                              +44 (0) 7788 554035

 Financial PR                                 guardianmetal@tavistock.co.uk

 Emily Moss/Josephine Clerkin

About Guardian Metal Resources

Guardian Metal Resources PLC (NYSE.A: GMTL, LON:GMET, OTCQB:GMTLF) is a
strategic mineral exploration company driving the revival of U.S. mined
tungsten production and strengthening America's defense metal independence.
The Company is advancing two tungsten projects, Pilot Mountain, one of the
largest undeveloped tungsten deposits in the U.S. and Tempiute, formerly
America's largest producing tungsten operation, both located in Nevada, one
of the top-rated mining jurisdictions in the United States.

In July 2025, the U.S. Department of War (DoW) under Title III of
the Defense Production Act of 1950, as amended, invested U.S. $6.2M in
Golden Metal Resources (USA) LLC, a wholly-owned subsidiary of Guardian
Metal Resources PLC, to support the Pilot Mountain PFS. The Company completed
a U.S. listing on the NYSE American on March 20, 2026.

Tungsten is a strategic metal critical to the defense, energy transition,
technology, and industrial sectors. In the context of shifting geopolitical
dynamics and tightening Chinese export restrictions, Guardian Metal is well
positioned to play a leading role in re-establishing a secure, domestically
mined U.S. supply chain for this vital defense metal.

 

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