Pricing of Upsized U.S. Initial Public Offering

Guardian Metal Resources plc (LON:GMET OTCQX:GMTLF), a U.S.-focused exploration-stage company focused on tungsten in Nevada, United States, is pleased to announce the pricing of its initial public offering in the United States of 4,444,400 American Depositary Shares ("ADSs"), representing 22,222,000 new ordinary shares ("ADS Shares"), at an initial public offering price of $13.50 per ADS for gross proceeds of approximately $60 million, before underwriting discounts and commissions and offering expenses. All ADSs sold in the initial public offering were offered by Guardian Metal.

Guardian Metal has granted the underwriters a 45-day option to purchase up to an additional 666,660 ADSs. The offering is expected to close on March 24, 2026, subject to customary closing conditions.

The ADSs are expected to begin trading on the NYSE American on March 20, 2026 under the ticker symbol "GMTL".

BMO Capital Markets Corp. is acting as lead book-running manager; Cantor Fitzgerald & Co. is acting as bookrunning manager; and D.A. Davidson & Co. and Berenberg Capital Markets LLC are each acting as co-managers for the offering.

Tamesis Partners LLP is acting as capital markets advisor to Guardian Metal.

A registration statement relating to these securities became effective on March 19, 2026. The offering is being made only by means of a prospectus. When available, copies of the final prospectus related to the offering can be obtained from: BMO Capital Markets Corp., Attn: Equity Syndicate Department, 151 W 42nd Street, 32nd Floor, New York, NY 10036, or by email at bmoprospectus@bmo.com.

ADMISSION AND TOTAL VOTING RIGHTS

Application will be made for the ADS Shares to be admitted to trading on AIM, which is expected to occur on or around March 24, 2026 ("Admission"). The ADS Shares will rank pari passu in all respects with the ordinary shares of the Company currently traded on AIM.

Following Admission, the Company's issued share capital will comprise 190,950,216 ordinary shares of £0.01 each. This number will represent the total voting rights in the Company and may be used by shareholders as the denominator for the calculation by which they can determine if they are required to notify their interest in, or a change to their interest in, the Company under the Financial Conduct Authority's Disclosure Guidance and Transparency Rules.

This announcement must not be acted on or relied on (i) in the United Kingdom, by persons who are not relevant persons, and (ii) in any member state of the EEA, by persons who are not EU Qualified Investors. Any investment or investment activity to which this announcement relates is available only to and will only be engaged with (i) in the United Kingdom, relevant persons, and (ii) in any member state of the EEA, EU Qualified Investors.