• Deep drilling intersected up to 4,434g/t Au 430m below surface at Mulga Bill
• Drilling 90m west of the 642,000oz Mulga Bill resource returned up to 48.30g/t Au
• Immediate follow-up drilling planned to bring these new areas into the resource

Great Boulder Resources has reported spectacular high-grade gold results from deep drilling and step-out exploration at its Side Well Gold Project in Western Australia. Deep drilling at the Mulga Bill deposit intersected grades of up to 4,434g/t Au (4.4kg/t Au) 430m below surface, demonstrating that the high-grade veins continue at depth. This has significant implications for the resource potential, as the Mulga Bill-Eaglehawk resource currently stands at 782,000oz over 2.5km of strike. Drilling 90m west of the existing 642,000oz Mulga Bill resource also returned high-grade intercepts of up to 48.30g/t Au, representing newly discovered gold lodes in an area that has seen limited previous drilling. The company is planning immediate follow-up drilling to bring these new areas of mineralisation into the resource. Additional deep drilling results are expected in the coming weeks, and the company is designing further RC programs to accelerate resource growth at Side Well, which is located within trucking distance of three processing plants. Great Boulder is fully-funded for the drilling program with ~$12m cash as at March 1, 2026.

Great Boulder has not provided any forward-looking financial metrics or guidance in the announcement.

Great Boulder has not provided a specific outlook statement in the announcement, but has indicated it will be conducting immediate follow-up drilling on the new high-grade discoveries, as well as designing additional RC programs to accelerate resource growth at the Side Well project.