Caijiaying Zone II Update

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

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

Email: [email protected]

3rd December 2025

Caijiaying Zone II Commissioning on Schedule for first Quarter 2026

Griffin Mining Limited ("Griffin" or the "Company) is pleased to announce that the commissioning of ore extraction from Zone II at the Caijiaying Mine is expected to commence in the first quarter of 2026.

As outlined in the Company's announcement dated the 18th September 2025 (the "Announcement"), the Company continues to support the ongoing government regulatory safety measures (including explosives supply restrictions) requested by the relevant County, City and Provincial Bureaus although, as stated in the Announcement, mine production and financial results will continue to be impacted until the 31st December 2025.

Importantly, there is no disruption to the supply of explosives for development activities and the Caijiaying Mine remains on schedule to obtain the full safety facility approval and completion of the necessary work to achieve commissioning of Zone II in the first quarter of 2026. The Company's strong support of the government's safety initiatives continues to strengthen its relationship with Chinese regulators in all of these activities and approvals.

Chairman's Statement

Chairman Mladen Ninkov commented, "The Company looks forward to the next chapter in it's 20 year operating history with the commissioning of Zone II in the near future and all the benefits that orebody is expected deliver. It is the Company's continuing support of the safety initiatives by the Chinese regulatory authorities that engenders the goodwill towards Griffin, as good citizens of China, to obtain the necessary approvals to take the Caijiaying Mine to the next level."

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

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