GREAT SOUTHERN COPPER PLC

Director's Dealing • Sep 8, 2025

National Storage Mechanism | Additional information

RNS Number : 4580Y

Great Southern Copper PLC

08 September 2025

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.

8 September 2025

Great Southern Copper plc

("GSC" or the "Company")

Director/PDMR Shareholdings

Great Southern Copper plc (LSE: GSCU), the company focused on copper-gold-silver exploration in Chile, announces that Nicholas Briers, a 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 respective ISA accounts. The transaction is summarised below:

Director	Shares sold	Shares acquired	Total holding following notification	% of issued Ordinary share capital
Nicholas Briers	428,481	428,481	1,477,777	0.26%

Enquiries:

Great Southern Copper plc
Sam Garrett, Chief Executive Officer	+44 (0)20 4582 3500
SI Capital Limited
Nick Emerson	+44 (0)14 8341 3500
BlytheRay
Tim Blythe / Megan Ray	+44 (0) 20 7138 3204

Notification and public disclosure of transactions by persons discharging managerial responsibilities/ person closely associated with them.

1

Details of the person discharging managerial responsibilities/person closely associated

a)

Name

Nicholas Briers

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 

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

Identification code

Ordinary shares of 1 pence each

GB00BLB5BF24

b)

Nature of the transaction

A.    Sales of shares from share dealing account

B.    Repurchase of ordinary shares into ISA account

c)

Price(s) and volume(s)

Price(s) £	Volume(s)
A    0.020 B    0.020075	428,481 428,481

d)

Aggregated information

A.     Sales

B.    Repurchase

Price(s) £	Volume(s)	Total £
A    0.020 B    0.020075	428,481 428,481	8,569.62 8,601.76

e)

Date of the transaction

8 September 2025

f)

Place of the transaction 

London Stock Exchange

About Great Southern Copper

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

The Especularita Project is 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 the exploration project area. The coastal belt offers deposit type optionality for copper including porphyry and IOCG style deposits as well as newly recognised intrusive-related copper and gold deposits.

Great Southern Copper is strategically positioned to support the global market for copper - a critical battery metal 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 as well as high-grade Cu-Ag-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 [email protected] or visit www.rns.com.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.

END

DSHUPUUUBUPAGCR