Guardian Metal Resources PLC Announces Board Update

Rhea-AI Summary

Guardian Metal Resources (OTCQX:GMTLF / AIM:GMET) announced the formal appointment of Michael Xavier Schlumpberger as an Independent Non-executive Director effective 11 November 2025.

Mr Schlumpberger joins the Audit Committee and the Remuneration Committee and replaces retiring director Mick Billing. The announcement follows the company’s 3 November 2025 board-change notice and completion of due diligence. Disclosed regulatory details include Mr Schlumpberger’s age (62) and a list of current and recent directorships.

Contact details for the company, nominated adviser, lead broker and PR are provided for investor enquiries.

Positive

• Independent NED appointment effective 11 Nov 2025
• Audit and Remuneration Committee memberships added

Negative

• Director turnover: replacement of retiring director Mick Billing

LONDON, UK / ACCESS Newswire / November 11, 2025 / Further to its announcement of board changes on 3 November 2025 and the conclusion of necessary due diligence, Guardian Metal Resources plc (AIM:GMET)(OTCQX:GMTLF), a mineral exploration and development company focused on tungsten within Nevada, USA, announces the formal appointment of Mr Michael Xavier Schlumpberger to its Board with immediate effect.

Michael will be an Independent Non-executive Director of Guardian Metal and will be a member of the Audit Committee and the Remuneration Committee. He replaces Mr. Mick Billing who is retiring from the Board, as announced previously.

Regulatory Disclosures:

The following information is disclosed pursuant to Rule 17 and Schedule Two paragraph (g) of the AIM Rules for Companies in relation to Mr. Schlumpberger, aged 62:

Current directorships and/or partnerships:	Former directorships and/or partnerships (within the last five years):
Rapid Critical Metals Limited (Australia) Spur Ranch Association (USA) Schlumpberger Inc; (USA)	Fort Cady (California) Corporation (USA) Fort Cady Holdings Pty Ltd (Australia) American Pacific Borates Pty Ltd (Australia)

There is no further information to be disclosed pursuant to paragraph (g) of Schedule 2 of the AIM rules.

For further information visit www.guardianmetalresources.com or contact the following:

Guardian Metal Resources plc Oliver Friesen (CEO)	Tel: +44 (0) 20 7583 8304
Cairn Financial Advisers LLP (Nominated Adviser) Sandy Jamieson/Jo Turner/Louise O'Driscoll	Tel: +44 (0) 20 7213 0880
Tamesis Partners LLP (Lead Broker) Charlie Bendon/ Richard Greenfield	Tel: +44 (0) 20 3882 2868
Tavistock (Financial PR) Emily Moss/Josephine Clerkin	Tel: +44 (0) 7920 3150/ +44 (0) 7788 554035 guardianmetal@tavistock.co.uk

About Guardian Metal Resources

Guardian Metal Resources PLC (LON:GMET)(OTCQX:GMTLF) is a strategic mineral exploration and development company driving the revival of U.S. tungsten production and strengthening America's independence in defense metals. The Company is advancing two co-flagship 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 U.S.

In July 2025, Golden Metal Resources (USA) LLC, a wholly-owned subsidiary of Guardian Metal, was awarded US$6.2M from the U.S. Department of War under Title III of the Defense Production Act of 1950 to support the rapid advancement and pre-feasibility study for the Pilot Mountain tungsten Project. Guardian Metal Resources joined both the Defense Industrial Base Consortium and the Cornerstone Program. The Company has also announced plans to pursue a U.S. listing in the first half of 2026.

Tungsten is a strategic mineral essential to the defense, energy transition, technology, and industrial sectors. Against the backdrop of evolving geopolitical dynamics and Chinese export restrictions on tungsten, Guardian is positioned to play the leading role in rebuilding a reliable domestic supply chain for this critical metal.

To learn more, please visit www.guardianmetalresources.com.

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

SOURCE: Guardian Metal Resources PLC

View the original press release on ACCESS Newswire

FAQ

Who has Guardian Metal Resources (GMTLF) appointed to its board on 11 November 2025?

The company appointed Michael Xavier Schlumpberger as an Independent Non-executive Director effective 11 November 2025.

What board roles will Michael Schlumpberger hold at Guardian Metal Resources (GMTLF)?

He will serve as an Independent Non-executive Director and join the Audit Committee and Remuneration Committee.

Which director did Guardian Metal Resources (GMTLF) replace with the 11 November 2025 appointment?

Michael Schlumpberger replaces Mick Billing, who is retiring from the board.

Where can investors find regulatory disclosures about the Guardian Metal Resources (GMTLF) board appointment?

Regulatory disclosures including age, current and recent directorships are provided in the announcement and on the company website.

When did Guardian Metal Resources first announce the board changes that led to the 11 November 2025 appointment?

The company previously announced board changes on 3 November 2025, with due diligence subsequently completed.