Vault Minerals Limited announced its Group Mineral Resources and Ore Reserves as at 30 June 2026. The Company reported Mineral Resources of 12.1 million ounces of gold and OreReserves of 3.9 million ounces of gold. Net of FY26 mine depletion of 398,800 ounces, Ore Reserves increased by 9% y-o-y, with Mineral Resources remaining materially consistent with the prior year.

Leonora Operations – Underground drilling delivering conversion and growth supported by low-cost
processing infrastructure in a prolific gold district Ore Reserves growth at the Leonora Operations was primarily driven by growth at Darlot and replacement of depletion at the KoTH underground. The increases offset mine depletion from the KoTH open pit, maintaining regional Ore Reserves at 2.7 million ounces.
A total of 64,839 metres was drilled at the KoTH and Darlot underground operations during FY26. Results from this program contributed directly to the 2026 Mineral Resource and Ore Reserve update, while also highlighting significant upside potential through resource extensions and identification of new mineralised structures.

Mount Monger Operations – Rumbles Ore Reserve growth extends open pit mining and demonstrates the value of established operations and infrastructure in the prevailing market
Ore Reserves at the Mount Monger Operations incorporate FY26 mine depletion, which was substantially offset by Ore Reserve conversion at the Daisy Complex and Reserve growth at the Rumbles open pit resulting from a 23-hole, 4,500 metre drill program completed in FY26.

Deflector Operations – Deflector Contact Lode exploration success delivers LOM extensions
Deflector region Mineral Resource and Ore Reserve growth was supported by a 25% increase in underground drilling at Deflector during FY26, with 51,830 metres completed. Exploration success at the Contact Lode and Ore Reserve conversion within the Deflector Main and Deflector South West lodes more than offset mine depletion, increasing the Deflector underground Ore Reserve by 10%.
At Rothsay, underground drilling was constrained by rig availability in FY26, limiting Reserve conversion opportunities. Drilling recommenced following the mobilisation of a rig in March and remains ongoing.

Sugar Zone – De-risked Reserve sets the foundations for long life operation with restart now underway The 2026 Mineral Resource and Ore Reserve are materially unchanged from the 30 June 2025 estimate, which incorporated 114,000 metres of drilling completed under Vault ownership during FY24 and FY25. The previous estimate included the Sugar South zone for the first time, adding a shallow, high-grade production front to complement Sugar Main and Middle Zone. Outside the immediate Sugar Zone mine corridor, Vault completed its maiden drill program at TT8, the first regional target assessed within its extensive contiguous land package