Phase 1 Drilling Completed at Mbe

Oriole Resources PLC (AIM: ORR), the AIM quoted gold exploration company focused on West and Central Africa, is pleased to report that Phase 1 drilling is now complete at its 90%[1] owned Mbe orogenic gold project ('Mbe' or the 'Project') in Cameroon, for 6,828.40m in 24 drill holes at the MB01-S target.

Results for the remaining four holes in the programme are expected later this month, with the maiden pit-constrained JORC Mineral Resource Estimate ('MRE') to be published as soon as possible thereafter in Q4-2025.

Commenting, Chief Executive Officer of Oriole Resources, Martin Rosser, said:

"Completion of the Phase 1 maiden drilling programme is an important milestone, and one which has been achieved by our dedicated field team working hard through the Cameroon wet season. Now we are eagerly looking forward to the independent consultant's maiden JORC mineral resource estimate in Q4-2025 and will announce the results for the remaining holes ahead of that".

With 285 gold ('Au') mineralised intervals reported to date, a selection of best results from the programme thus far are shown in Table 1.

Table 1. Selection of best gold mineralised drill intersections reported to date from Phase 1 holes (MBDD001 to MBDD020), using a 0.20g/t Au lower cut-off grade.

One planned drill hole, located to the northeast of the grid, could not be completed due to weather-related access issues. However, it is not expected to have a significant detrimental impact on the pit-constrained JORC MRE for MB01-S, which is anticipated for release in Q4-2025.

As previously reported, the Competent Person's site visit for the MRE has already been completed and so the estimation work will begin in earnest as soon as results for the remaining four holes have been received later this month. In the meantime, Forge International, the Company's Independent consultant, has confirmed that the trenching, as well as the drilling, can be included in the MRE, which should help to maximise conversion to Resource ounces over that target.

Since the mineralised system is currently open in all directions, any MRE will be provisional and will be open to upgrade and expansion through further exploration. Any mineralised material that doesn't get converted into the MRE, will remain in the Exploration Target category, including the material at MB01-N which is yet to be drilled.

The Company looks forward to reporting the final drilling results and the MRE later this year.

Glossary and Abbreviations

After highly encouraging results from infill soil sampling, rock-chip sampling, and trench sampling, a fully funded maiden drilling programme commenced at the MB01-S target in late November 2024 and is planned for 7,050m in 25 holes. BCM International has acquired an initial 10% interest in Mbe and is earning up to a further 40% interest by spending up to US$4 million on exploration.

An Exploration Target[2] range of 33 to 44Mt at 0.77 to 0.95g/t Au for 0.82 to 1.34Moz contained Au was published in July 2025, based on diamond drilling results from holes MBDD001 to MBDD013 at MB01-S, as well as trenching data, and the interpretation of geophysical and geochemical anomaly maps from both MB01-N and MB01-S. The Exploration Target remains open in all directions and at depth and it is anticipated that it will be succeeded by a maiden MRE in Q4 2025, following completion of the Phase 1 drilling programme later this quarter.