8^th Floor, 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

Transaction in own shares

5^th December 2023

Griffin Mining Ltd ("the Company") announces that on 4^th December 2023 it purchased 15,000 of the Company's own ordinary shares ("Ordinary Shares") at a price of 86.0p per Ordinary Share. The Ordinary Shares have been purchased to be held in treasury for the time being.

Following completion of the purchase of these Ordinary Shares there are 192,828,420 Ordinary Shares in issue, of which 1,254,924 Ordinary Shares will be held in treasury.

Consequently, shareholders should use 191,573,496 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 Company, under the Disclosure Guidance and Transparency Rules of the Financial Conduct Authority.

Further information

Griffin Mining Limited

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

Roger Goodwin - Finance Director

Panmure Gordon (UK) Limited                                                  Telephone: +44 (0)20 7886 2500

             John Prior

             Dougie McLeod

Berenberg                                                                                          Telephone: +44(0)20 3207 7800

                Matthew Armitt

Jennifer Lee

This announcement contains inside information for the purposes of Article 7 of the Market Abuse Regulation (EU) No. 596/2014

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