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  • October 7, 2026

GREAT BOULDER CONFIRMS HIGH-GRADE GOLD EXTENSIONS AT MULGA BILL

Drilling highlights extended mineralisation footprint at Side Well Project

Great Boulder Resources Limited (ASX:GBR) has reported significant reverse circulation (RC) drilling results 250m north of Mulga Bill, confirming high-grade gold mineralisation beyond the current resource area at the company’s flagship Side Well Gold Project near Meekatharra in Western Australia.

Key drilling results include:

  • 8m @ 10.84g/t Au from 135m, including 3m @ 27.94g/t Au from 138m in hole 24MBRC018
  • 6m @ 7.62g/t Au from 136m in 24MBRC012
  • 8m @ 2.02g/t Au from 72m, including 4m @ 3.86g/t Au in 24MBRCD013

The drilling has extended the mineralised footprint at Mulga Bill to over 2.3km, with ongoing exploration to further delineate this growing resource. Additionally, two deep diamond holes have been completed, with results expected in October.

Great Boulder’s Managing Director, Andrew Paterson, stated

RC drilling immediately north of Muga Bill has confirmed high-grade mineralisation extending 250m north of the current resource envelopes. This program comes on the back of high-grade hits announced in this area earlier in the year, including 16m @ 13.83g/t Au in hole 24MBRC001.

The new results support our expectation that we will be able to extend and increase the Mulga Bill JORC resource estimate later this year.

The combined footprint of Mulga Bill and Mulga Bill North extends over 2.3km of strike, and we’ve really only scratched the surface of the northern half of that zone with relatively shallow drilling.

The RC rig has now moved onto resource definition targets at Mulga Bill. This program is designed to infill and extend areas of the inferred resource to upgrade those ounces to JORC indicated category. We will then return to greenfields targets, with a first-pass AC program at Side Well South in late September.

Read the full announcement.

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