27 August 2026

Guardian Metal Resources plc

('Guardian Metal' or the 'Company')

Publication of Technical Report Summary for Pilot Mountain

Guardian Metal Resources plc (NYSE.A: GMTL, LON: GMET, OTCQB: GMTLF), a strategic mineral exploration company focused on tungsten in Nevada, USA, is pleased to announce the publication of its Technical Report Summary ("TRS") for the Pilot Mountain tungsten project ("Pilot Mountain"). The TRS supports the results of the Company's Pre-Feasibility Study announced on 30 June 2026 and has been prepared in accordance with S-K 1300 standards. The Pilot Mountain TRS is available for download on the company's website at https://guardianmetalresources.com/project/pilot-mountain-project/.

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

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 defence metal independence. 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 one of America's largest producing tungsten operations, both located in Nevada, one of the top-rated mining jurisdictions in the world.

In July 2025, the U.S. Department of War (DoW) under Title III of the Defense Production Act of 1950, as amended, invested US$6.2M in Golden Metal Resources (USA) LLC, a wholly-owned subsidiary of Guardian Metal Resources PLC, to support the recently completed 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 defence, 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 defence metal.