Great Western Mining Corporation PLC / AIM: GWMO / Euronext Growth: 8GW

17 October 2025

GREAT WESTERN MINING CORPORATION PLC

("Great Western", "GWM" or the "Company")

EXERCISE OF WARRANTS AND ISSUE OF EQUITY

Great Western Mining Corporation PLC (AIM - GWMO, Euronext Growth - 8GW), which is exploring and developing multiple early-stage gold, silver and copper targets in Nevada, announces that it has received a notice of exercise of 2,500,000 warrants over new ordinary shares of €0.0001 each in the share capital of the Company at a price of 0.013pence per share ("the Warrant Shares"), which were granted in conjunction with the Placing announced on 10 June 2025.  The Company will issue the Warrant Shares with gross proceeds amounting to £32,500.

Settlement and Dealing

Application will be made to the AIM Market of the London Stock Exchange ("AIM") and Euronext Growth for a total of 2,500,000 ordinary shares, which will rank pari passu with the Company's existing issued Ordinary Shares, to be admitted to trading. Dealings on AIM and Euronext Growth are expected to commence on or around 24 October 2025 ("Admission").

Total Voting Rights

In conformity with Regulation 20 of the Transparency (Directive 2004/109/EC) Regulations 2007, Great Western advises that the total number of ordinary shares of €0.0001 each in issue (with voting rights) will be 179,689,274 following the issue of the Warrant Shares. The Company does not hold any ordinary shares in treasury.

This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in Great Western under the Transparency (Directive 2004/109/EC) Regulations 2007 and the Transparency Rules.

ENDS

For further information visit www.greatwesternmining.com or contact:

Notes

Great Western Mining Corporation PLC (AIM: GWMO / Euronext Growth: 8GW) is a diversified exploration and development company focused on strategic minerals across several 100%-owned claim groups in Mineral County, Nevada, one of the world's most prolific and mining-friendly jurisdictions. Backed by an experienced team, the Company is pursuing a multi-commodity strategy targeting near-term development and longer-term exploration while assessing farm-out and joint venture opportunities to unlock broader portfolio value. As well as its flagship Huntoon Copper Project, which hosts a JORC-compliant resource of 4.3 Mt at 0.45% Cu, with upside from undrilled porphyry targets, it has a pipeline of gold, silver, and early-stage tungsten assets aligned with US critical minerals priorities.