Announcement PDF RNS Number : 7417Z Great Southern Copper PLC 15 January 2024 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. 15 January 2024 Great Southern Copper plc ("GSC" or the "Company") Director/PMDR Shareholding Great Southern Copper plc (LSE: GSCU), the company focused on copper-gold and lithium exploration in Chile, announces that Nick Briers, Non-Executive Director, sold and repurchased Ordinary Shares through a Bed and ISA arrangement, in order to effect the transfer of the Ordinary Shares to his ISA account. The transaction is summarised below: Director Shares sold Shares acquire d Total holding following notificati on % of current issued Ordinary Share capital Nick Briers 849,296 849,296 1,477,777 0.43% This announcement is made in accordance with Article 19 of the EU Market Abuse Regulation 596/2014. 1 Details of the person discharging managerial responsibilities / person closely associated a) Name 2 Reason for the notification a) Position/status Non-Executive Director b) Initial notification /Amendment Initial Notification 3 Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor Nick Briers a) Name Great Southern Copper plc b) LEI 213800RF6N9WA8PZH313 4 Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted a) Description of the financial instrument, type of instrument ordinary shares of 1 pence each Identification code ISIN: GB00BLB5BF24 b) Nature of the transaction 1. Sale of Ordinary Shares from share dealing account 2. Repurchase of Ordinary Shares into ISA account c) Price(s) and volume(s) Price(s) Volume(s) 1. £0.023 849,296 2. £0.02304 849,296 d) Aggregated information Price(s) £0.023 £0.02304 e) Date of the transaction 12 January 2024 f) Place of the transaction London Stock Exchange 1. Sale 2. Repurchase Volumes(s) 849,296 849,296 Total £19,533.81 £19,567.78 Enquiries: Great Southern Copper plc Sam Garrett, Chief Executive Officer +44 (0) 20 4582 3500 SI Capital Limited Nick Emerson +44 (0) 1483 413500 Gracechurch Group Harry Chathli, Alexis Gore, Henry Gamble +44 (0) 20 4582 3500 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 and lithium deposits in Chile. The Company has the option to acquire rights to 100% of two projects in the underexplored coastal belt of Chile that are prospective for large scale copper-gold deposits. In addition, the Company has the option to acquire rights to 100% of a lithium project located in the Salar de Atacama district of Chile. Chile is a globally significant mining jurisdiction being the world's largest copper producer and the second-largest producer of lithium. The two, early-stage Cu-Au projects comprise the San Lorenzo and Especularita Projects, 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. The Company's Monti Lithium project is strategically located in the pre-Andean region of Salar de Atacama which is Chile's premier lithium-producing region with well-established lithium mining operations and infrastructure. Great Southern Copper is strategically positioned to support the global market for copper and lithium - both 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 Li deposits as well as high-grade Cu-Au deposits. Further information on the Company is available on the Company's website: https://gscplc.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. 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