Griffin Mining Regulatory News (GFM)

8th Floor, Royal Trust House, 54 Jermyn Street, London. SW1Y 6LX. United Kingdom

Telephone: + 44 (0)20 7629 7772 Facsimile: + 44 (0)20 7629 7773

E mail: griffin@griffinmining.com

Share Buy Back Programme

3rd June 2026

As outlined in Griffin Mining Limited's ("Griffin" or the "Company') announcements on the 26th February 2024, 7th August 2024, 30th October 2024 and 18th June 2025, the Company is reinstituting its share buy-back programme. The repurchased shares will be acquired on market and on an ad hoc basis as determined by the Company (the "Buy Back Programme").

The Company has further resolved to purchase up to 3.7 million outstanding ordinary shares and/or up to $15 million of such shares for cancellation until 30th November 2026, after which the directors of the Company may consider a further Buy Back Programme and/or other means of returning excess funds to shareholders. This arrangement is in accordance with the Company's general authority to repurchase shares.

The Buy Back Programme will be carried out on the London Stock Exchange and will be effected within the safe harbour provisions set out in the Market Abuse Regulation 596/2014 ("MAR"), the Commission Delegated Regulation (EU) 2016/1052 and the applicable laws and regulations of the London Stock Exchange.

Purchases will be carried out in compliance with the relevant conditions for trading, restrictions regarding time and volume, disclosure and reporting obligations, and price conditions. The Company will seek to make market purchases at a price or prices and volume that the Company believes will be value-enhancing for the Company's shareholders.

In addition to the Share Buyback Programme, the directors continue to reserve the right (subject to compliance with applicable law) to:

1. purchase large blocks of shares from individual shareholders where the large number of such shares offered in the market may cause instability in the Company's share price; and

2. purchase a larger number of shares via a tender offer which would be the subject of further documentation being sent to non-US resident shareholders.

Instructions to purchase Shares will not be given by the Company during closed periods or at any time where market sensitive information has yet to be disclosed to the markets. The buy-back programme may be cancelled or suspended at any time.

There are 176,592,171 Ordinary Shares in issue, with none held in treasury. Shareholders should use 176,592,171 Ordinary Shares as the denominator for the calculations by which they will determine if they are required to notify their interest in, or change their interest in, the Company, under the Financial Conduct Authorities Disclosure and Transparency Rules.

About Griffin Mining Limited 

Griffin Mining Limited's shares are quoted on the Alternative Investment Market (AIM) of the London Stock Exchange (symbol GFM). Griffin Mining Limited owns and operates in China, through its 88.8% owned Joint Venture stock company, the Caijiaying Zinc Gold Mine, a profitable mine producing zinc, gold, silver, and lead metals in concentrates. For more information, please visit the Company's website www.griffinmining.com.

Further information

Griffin Mining Limited

Mladen Ninkov - Chairman Telephone: +44(0)20 7629 7772

Roger Goodwin - Finance Director

Panmure LIBERUM Telephone: +44 (0)20 7886 2500

James Sinclair-Ford

Zak Wadud

Berenberg Telephone: +44(0)20 3207 7800

Matthew Armitt

Jennifer Lee

Griffin Mining Limited's shares are quoted on the Alternative Investment Market (AIM) of the London Stock Exchange (symbol GFM).

The Company's news releases are available on the Company's web site: www.griffinmining.com