Tertiary Minerals PlcLSE: TYM

Correction to Grant of Warrants RNS

· Issued by Tertiary Minerals Plc

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("Tertiary" or the "Company")

15 May 2026

Correction to Grant of Warrants RNS

Tertiary Minerals plc (AIM: TYM) ), the London listed explorer focused on copper and precious metals in Zambia and Nevada, USA, announces a correction to its 'Grant of Warrants' announcement of 17 April 2026. The Company has become aware of an error in the exercise price of the warrants which was stated as being 0.85 pence per share but should have been 0.085 pence per share, being the closing mid-market price on 16 April 2026.

All other details remain unchanged.

Further Information:

Tertiary Minerals plc

Richard Belcher, Managing Director

+44 (0) 1625 838 679        

SP Angel Corporate Finance LLP, Nominated Adviser and Broker

Richard Morrison/Caroline Rowe

+44 (0) 203 470 0470

AlbR Capital Limited, Joint Broker

Lucy Williams/Duncan Vasey

+44 (0) 207 469 0930