Orbminco Limited (ASX: OB1) — Interim Drilling Update: Majestic North Gold Project Delivers High-Grade Shallow Gold Intersections

29 June 2026

Price Sensitive Announcement $

Highlights:

• Interim assay results received from 27-hole RC drilling program at the 100% owned Majestic North Gold Project in Western Australia — results received for the Stage 1 ten-hole Resource Development infill program
• High-grade gold returned from infill drilling within the shallow optimised pit shell, including 2m at 17.69g/t Au from 19m (MNRC253), and 1m at 8.05g/t Au from 20m (MNRC256)
• Nine of the infill holes returned gold above a 0.5g/t Au cut-off, with five intersecting shallow mineralisation from approximately 19m downhole
• Assays for the sixteen structural junction holes and the deeper basement hole (MNRC276) remain pending and will be reported when received and verified
• Results have the potential to improve the quality of the current Mineral Resource of 1.38Mt at 1.14g/t Au for approximately 50,300 ounces at a 0.5g/t Au cut-off, comprising 966kt at 1.1g/t Au Indicated and 409kt at 1.2g/t Au Inferred
• In particular, results may enhance the previously reported higher-grade domain of 249kt at 2.42g/t Au for 19,300oz at a 1.5g/t Au cut-off, comprising 171kt at 2.3g/t Au Indicated and 78kt at 2.6g/t Au Inferred

Overview:

Orbminco has provided an encouraging interim update from its RC drilling program at the 100% owned Majestic North Gold Project, located approximately 65km southeast of Kalgoorlie in Western Australia’s Eastern Goldfields, with the first batch of assays confirming high-grade shallow gold mineralisation within the project’s optimised pit shell.

The combined 27-hole, ~2,220m program is structured across three stages: a ten-hole, 536m vertical Resource Development infill program targeting Inferred Mineral Resource within the shallow pit shell; a sixteen-hole, ~1,560m angled program testing four interpreted structural junctions; and a single ~120m deeper hole (MNRC276) testing the primary basement source beneath the supergene blanket. This update reports only the first stage — the ten-hole infill program — with results from the structural junction testing and basement hole still pending.

Of the ten infill holes, nine returned gold above the 0.5g/t Au cut-off, with five intersecting shallow mineralisation from around 19m downhole. The standout result, MNRC253, returned 2m at 17.69g/t Au from 19m, while MNRC256 added 1m at 8.05g/t Au from 20m — both supporting the case for upgrading Inferred material to Indicated status within the shallow optimised pit.

The structural junction program, once assays are received, will provide the first direct test of the structures interpreted to control Majestic North’s higher-grade domain — a 249kt zone grading 2.42g/t Au for approximately 19,300 ounces. Subject to all results being finalised and verified, Orbminco considers the broader program has the potential to improve overall resource quality through better classification, grade continuity and possible extensions along strike and at depth, with any resulting changes to be incorporated into an updated Mineral Resource Estimate in the second half of 2026 and fed into Stage 1 mining studies under the Company’s Mine Development Program.

About Orbminco Limited (ASX: OB1):

Orbminco is an ASX-listed gold exploration and development company advancing its 100% owned Majestic North Gold Project in Western Australia’s Eastern Goldfields, approximately 65km southeast of Kalgoorlie. The project hosts a JORC (2012) Mineral Resource of 1.38Mt at 1.14g/t Au for approximately 50,300 ounces, including a higher-grade domain of 249kt at 2.42g/t Au for 19,300 ounces. The Company is progressing an active RC drilling program designed to upgrade resource confidence and test structural controls on higher-grade mineralisation ahead of planned Stage 1 mining studies.

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