Admission of Shares

THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION AS STIPULATED UNDER THE UK VERSION OF THE MARKET ABUSE REGULATION NO 596/2014 WHICH IS PART OF ENGLISH LAW BY VIRTUE OF THE EUROPEAN (WITHDRAWAL) ACT 2018, AS AMENDED. ON PUBLICATION OF THIS ANNOUNCEMENT VIA A REGULATORY INFORMATION SERVICE, THIS INFORMATION IS CONSIDERED TO BE IN THE PUBLIC DOMAIN.

11 March 2025

Great Southern Copper plc

("GSC" or the "Company")

Admission of Shares

Further to the announcement on 5 March 2025, Great Southern Copper plc (LSE: GSCU), the company focused on copper-gold exploration in Chile, announces that the admission of the 36,000,000 new ordinary shares to trading on the main market of the London Stock Exchange plc, became effective at 8.00am this morning.

Details of new shares admitted

The Company has raised £1,044,000 through a subscription, resulting in the issue of 36,000,000 new ordinary shares of 1p each, at a subscription price of £0.029 per ordinary share. 16,000,000 of the new ordinary shares were subscribed by a financial institution, with the balance offered to one of the Company's directors who agreed to direct their issue to the same financial institution at the same subscription price on admission.

Total Voting Rights

The total number of issued shares and the total number of voting rights in the Company is 550,643,990. This figure should be used by shareholders in the Company 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, the share capital of the Company under the Financial Conduct Authority's Disclosure Guidance and Transparency Rules.

Enquiries:

Notes for Editors:

About Great Southern Copper

Great Southern Copper PLC is a UK-listed mineral exploration Company focused on the discovery of copper-gold in Chile. The Company has the option to acquire rights to 100% of two projects in the under-explored coastal belt of Chile that are prospective for large scale copper-gold deposits. Chile is a globally significant mining jurisdiction being the world's largest copper producer.

The two, early-stage Cu-Au projects comprise the Especularita Projects and San Lorenzo, both located in the coastal metallogenic belt of Chile which hosts significant copper mines and deposits, including Teck's Carmen de Andacollo copper mine, and boasts excellent access to infrastructure such as roads, power and ports. Significant historical small-scale and artisanal workings for both copper and gold are readily evident in both exploration project areas.

Great Southern Copper is strategically positioned to support the global market for copper - a critical battery metals in the clean energy transition around the world. The Company is actively engaged in exploration and evaluation work programmes targeting both large tonnage, low to medium grade Cu-Au and Ag deposits as well as high-grade Cu-Au deposits.

Further information on the Company is available on the Company's website: https://gscplc.com