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

12^th November 2025

Griffin Mining Ltd ("the Company") announces that on 11^th November 2025 it purchased 20,000 of the Company's own ordinary shares ("Ordinary Shares") at a price of 187 pence per Ordinary Share. These Ordinary Shares purchased will be cancelled.

Following completion of the purchase and cancellation of these Ordinary Shares there will be 176,590,171 Ordinary Shares in issue. Consequently, shareholders should use 176,590,171 Ordinary Shares 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.

Further information

Griffin Mining Limited

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

Roger Goodwin - Finance Director

Panmure Liberum Limited - Nominated Adviser & Joint Broker                               Telephone: +44 (0)20 7886 2500

             James Sinclair-Ford

              Zak Wadud

Berenberg - Joint Broker                                                                                          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

Individual transactions: