8^th Floor, 54 Jermyn Street, London, SW1Y 6LX. United Kingdom

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

Email: griffin@griffinmining.com

21^st April 2026

Zone II Production Commenced

Griffin Mining Limited ("Griffin" or the "Company) is extremely pleased to announce that the first production blast in Zone II was successfully completed on the 20^th April 2026 marking a key milestone in the commissioning and final safety approval process of Zone II in accordance with governing Chinese regulations. All statutory mandated  mine development, totalling 19.4 kilometres and ventilation shafts totalling 625 metres, were completed on the 15^th April 2026. Ore is now expected to be mined continuously from Zone II for the duration of the current mining licence running to 2054.

Chairman's Statement

Chairman Mladen Ninkov commented, "This is a proud and momentous day for the Company, it's shareholders, the Caijiaying Mine and it's staff and contractors. It's importance cannot be overstated as the Caijiaying Mine moves to a second source of ore to 2054. I am delighted for all concerned"

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