MASTERMYNE GROUP LIMITED — Capital/Financing Update 2026

Feb 11, 2026

12 February 2026

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MASTERMYNE GROUP LIMITED (ASX CODE: MYE) GLENCORE VENTILATION AND STRATA CONSOLIDATION CONTRACT

Mastermyne Group Limited (ASX Code: MYE) (“Mastermyne” or “the Company”) is pleased to advise that it has executed a 3 year (plus 2 year extension option) Umbrella Agreement with Glencore Australia’s Ulan Coal Mine Complex in New South Wales.

The contract confirms and formalises the ongoing delivery of Mastermyne’s current ventilation services at Ulan West Underground and strata consolidation services to both Ulan West and Ulan Underground, with estimated revenues over the initial contract term in the order of $10 to $15 million.

Approved for distribution by the Board of Directors of Mastermyne Group Limited. Stephen Rodgers, Company Secretary

Further information:

Jeff Whiteman, Managing Director and Chief Executive Officer – 07 4963 0400 Matt Ruhl, Chief Financial Officer – 07 4963 0400

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