Strong Final Drilling Results for Mbe

The information contained within this announcement is deemed to constitute inside information as stipulated under the retained EU law version of the Market Abuse Regulation (EU) No. 596/2014 (the "UK MAR") which is part of UK law by virtue of the European Union (Withdrawal) Act 2018. The information is disclosed in accordance with the Company's obligations under Article 17 of the UK MAR. Upon the publication of this announcement, this inside information is now considered to be in the public domain.

Oriole Resources PLC

('Oriole Resources' or the 'Company')

Strong Final Drilling Results for Mbe - New Zone Delivers Wide Gold Intersections Outside of Exploration Target

Oriole Resources PLC (AIM: ORR), the AIM quoted gold exploration company focused on West and Central Africa, is pleased to report final results for the recently completed 6,828.40m maiden ('Phase 1') drilling programme at its 90%[1] owned Mbe orogenic gold project ('Mbe' or the 'Project') in Cameroon.

Highlights

· Results for the final holes, MBDD021 to MBDD024, have returned a further 59 gold mineralised intersections at the MB01-S target, taking the total number of gold-bearing intersections over the programme to date to 344, equating to a discovery rate of more than one intersection every 20m. The latest results include (using a 0.20 g/t Au lower cut-off grade):

MBDD024:

o  29.80m at 0.79g/t Au from 116.90m including 13.70m at 1.36g/t Au

o  11.00m at 0.73g/t Au from 85.10m including 6.00m at 1.13g/t Au

o  4.55m at 0.47g/t Au from 167.00m including 1.05m at 1.08g/t Au

MBDD022:

o  12.50m at 0.74g/t Au from 5.50m, including 4.20m at 1.31g/t Au and 1.00m at 1.33g/t Au

o  9.50m at 0.45g/t Au from 39.50m, including 1.00m at 1.48g/t Au

o  8.00m at 0.53g/t Au from 61.40m

MBDD023:

o  5.00m at 0.87g/t Au from 87.80m, including 1.00m at 2.52g/t Au

o  9.50m at 0.41g/t Au from 223.80m, including 1.00m at 1.06g/t Au

MBDD021:

o  1.10m at 0.96g/t Au from 5.20m

o  1.00m at 1.30g/t Au from 75.00m

o  1.00m at 1.13g/t Au from 208.40m

· MBDD024, drilled over the westernmost soil anomaly, has confirmed substantial widths of gold mineralisation outside of the limits of the existing Exploration Target, and has increased the width of sub-surface mineralisation to approximately 550m.

· In addition, holes MBDD021 - MBDD023 were drilled on a new fence line (N872382), approximately 100m south of previous drilling (N872482), and have extended the strike length of the sub-surface system to around 500m. Mineralisation remains open in all directions.

· Following the confirmatory site visit last month, the Company has now instructed Forge to complete a maiden Mineral Resource Estimate for MB01-S, which accounted for approximately 60% of the Exploration Target. The results are expected in Q4-2025.

Commenting, Chief Executive Officer of Oriole Resources, Martin Rosser, said: "We are pleased that the final MB01-S maiden drilling programme results support further extensions to the Exploration Target we published in July, approximately 60% of that estimate relating to MB01-S."

"Importantly, they have shown that the sub surface mineralised system at MB01-S now extends over an approximate 500m strike length, a width of approximately 550m and a vertical depth of at least 290m, with the system remaining open in all directions.

"The maiden JORC MRE is due in Q4-2025 and is expected to achieve a high level of conversion over the Exploration Target at MB01-S, and an expansion of that estimate is also anticipated based on these new results."

Figure 1. Selected best results for holes MBDD021 and MBDD024 (blue boxes) reported today, alongside previously reported best results for the rest of the maiden drilling programme (white boxes). All newly reported holes are drilled towards 270˚ (from grid north). Drilling fence line IDs are in blue text. The data is overlain on gold-in-soil contours, and the previously reported Exploration Target outline is delineated.

Further Details

A Phase 1 diamond drilling programme commenced at MB01-S in late November 2024 and was completed in September 2025 for a total of 6,828.40m in 24 holes.

The Company today reports final results for the programme, related to holes MBDD021 to MBDD024, with all holes drilled towards the west (270˚). Results have delivered 59 further mineralised intersections, including some significant wide zones of sub-gramme material such as 29.80m at 0.79g/t Au, including 9.60m at 1.77g/t Au, and 11.00m at 0.73g/t Au (MBDD024), and 12.50m at 0.74g/t Au, including 3.10m at 1.60g/t Au and 1.00m at 1.13g/t Au, and 9.50m at 0.45g/t Au, including 1.00m at 1.48g/t Au (MBDD022) (Table 1). The total number of gold bearing intersections over the programme stands at 344, equating to a discovery rate of more than one intersection every 20m. A review of the QAQC samples has confirmed that the data falls within acceptable limits. 

Table 1. Calculated intersections from Phase 1 holes MBDD021 to MBDD024, using a 0.20g/t Au lower cut-off grade. Results greater than 1.00g/t Au are in bold and 'including' intervals are in bold italics.

All holes extended the limits of sub-surface mineralisation. Importantly, hole MBDD024 was located on a new fence line (N872442), planned to test the westernmost soil anomaly. The wide zones of gold anomalism identified in this hole predominant fall outside of the Exploration Target published in July 2025 and therefore offers further upside when the MRE is prepared, having extended the width of the sub-surface system by approximately 100m. 

Holes MBDD021 to MBDD023 are located on new fence line N872382, some 100m south of N872482, underpinning results from the 2024 trenching programme and again extending the limits of the sub-surface system.

Figure 2. Interpretative cross section for fence line N872442 at MB01-S, with selected mineralised intervals from holes MBDD024.

Figure 3. Interpretative cross section for fence line N872382 at MB01-S, with selected mineralised intervals from holes MBDD021 - MBDD023.

Overall, the maiden drilling programme has confirmed that the system at MB01-S extends over an approximate 500m strike length, a width of approximately 550m and a vertical depth of at least 290m, with the system remaining open in all directions.

The data has been shared with Forge, who will now undertake geological wireframing to inform the pit-constrained maiden Resource estimation. The MRE will be for MB01-S only, which accounts for approximately 60% of the Exploration Target, and is anticipated in early Q4.  Forge anticipates a strong level of conversion but any material that doesn't have enough sample support to be upgraded to a JORC Resource category, including that at MB01-N, which is yet to be drilled, will remain in the Exploration Target and will be reported separately. The Company believes that the deposit could be mined by open pit methods. 

Further information can be found in the JORC Table 1 disclosure on the following page of the Company's website: https://orioleresources.com/projects/mbe/. 

Enquiries:

Competent Persons Statement

The information in this announcement that relates to the Exploration Target is based on data compiled by Mr. Robert Davies, EurGeol, CGeol, an independent consultant to Oriole. Mr Davies is a Director of Forge International Limited. Mr Davies has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the JORC Code. Mr Davies consents to the inclusion in the report of the matters based on his information in the form and context in which it appears. The Company confirms that it is not aware of any new information or data that materially affects the Exploration Target, and that all material assumptions and technical parameters underpinning the Exploration Target continue to apply.

The technical information in this release that relates to exploration results and the planned exploration programme has been compiled by Mrs Claire Bay (Executive Director). Claire Bay (MGeol, CGeol) is a Competent Person as defined in the JORC code and takes responsibility for the release of this information. Claire has reviewed the information in this announcement and confirms that she is not aware of any new information or data that materially affects the information reproduced here.

Glossary and Abbreviations

Notes to Editors

Oriole Resources

Oriole Resources PLC is an AIM-quoted gold exploration company, with projects in West and Central Africa. It is focused on early-stage exploration in Cameroon, where the Company has reported a Resource of 460,000oz contained gold at 2.06g/t Au in the JORC Indicated and Inferred categories at its 90% owned Bibemi project and has identified multi-kilometre gold anomalies within the district scale Central Licence Package project, including the Mbe project. At Mbe, the Company has published a maiden Exploration target range of 33 to 44Mt at a grade of 0.77 to 0.95g/t Au for 0.82Moz to 1.34Moz contained gold for the MB01 prospect, and a maiden Resource for the MB01-S target is scheduled for Q4-2025. BCM International is currently earning up to a 50% interest in the Bibemi and Mbe projects in return for a combined investment of US$1.5 million in signature payments, up to US$8 million in exploration expenditure, as well as JORC resource-based success payments. 

At the Senala gold project in Senegal, AGEM Senegal Exploration Suarl ('AGEM'), a wholly owned subsidiary of Managem Group, has completed a six-year earn-in to acquire an approximate 59% beneficial interest in the Senala Exploration Licence by spending US$5.8 million. The Company has reported a Resource of 155,000oz contained gold at 1.26g/t Au in the JORC Inferred category for the Faré South prospect, and an additional, complementary Exploration Target range of 17 to 24Mt at a grade of 0.69 to 0.84g/t Au for 380,000 to 650,000oz contained gold for all prospects at Senala. Discussions on the formation of a joint venture company are currently underway. The Company also has several interests and royalties in companies operating in East Africa and Turkey that could give future cash payments.

For further information please visit www.orioleresources.com,  @OrioleResources on X

Background on Mbe

Mbe, with a licence area of 312km2, is an orogenic gold project located within the broader 2,266km2 'Eastern CLP' package of five contiguous gold focused exploration licences in the Adamawa Region of central Cameroon. Since 2022, the Company's systematic exploration programmes have identified a 3km long, NE trending prospect, named MB01, which sits within a wider 12.5km long zone of gold-in-soil anomalism that trends ENE.

At MB01, increased dilation at the sites of structural intersections (steeply dipping NNE and NNW trending shear structures) is believed to have resulted in enhanced levels of gold deposition at the northern target, MB01-N, and MB01-S, the southern target. Gold mineralisation at these targets comprises high-grade, sulphide- and telluride-rich quartz veins, veinlets and breccias within wider envelopes of pervasive, lower-grade gold mineralisation. 

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 was completed in September 2025 for 6,828.40m in 24 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.