Step-out Drilling Completed at Mbe South

Oriole Resources PLC (AIM: ORR), the AIM quoted gold exploration and development company focused on Central and West Africa, is pleased to announce further results from the Step-out diamond drilling programme (the "Programme" or "Phase 3") at the MB01-S deposit at its 50% owned Mbe orogenic gold project ("Mbe" or the "Project") in Cameroon. The total JORC Inferred Mineral Resource Estimate ("MRE") at Mbe currently stands at 1.23 million oz contained gold ("Au") across both the MB01-S and MB01-N deposits. The Programme has now been completed for 2,476.80m in 10 holes and results for the remaining five holes are expected later this month. Thereafter, it is anticipated that an updated JORC MRE will be reported for MB01-S in early Q3-2026.

Highlights

• Results for holes MBDD043 and MBDD044 have returned 23 mineralised gold intersections, including:

o MBDD044

• 27.20m at 1.69g/t Au from 96.00m depth, including 6.00m at 5.81g/t Au, 1.00m at 2.19g/t Au and 1.00m at 2.09g/t Au

o MBDD043

• 27.60m at 0.58g/t Au from 53.30m depth, including 1.10m at 4.08g/t Au and 2.80m at 1.20g/t Au
• Hole MBDD044 appears to represent the along strike extension of the 29.80m at 0.79g/t Au intersection in MBDD024, located 180m to the SSE.
• The Programme has been completed for 2,476.80m in 10 holes, with results for the remaining five holes expected later this month.
• An updated MRE for MB01-S is anticipated in early Q3-2026.

Chief Executive Officer of Oriole Resources, Martin Rosser, said: "The latest two drill hole results for the step-out drilling programme at the MB01-S deposit are over significant widths, and hole MBDD044 has a pleasing best intersection of 27.20m at 1.69g/t Au.

"The completion of the 10-hole drilling programme has been achieved in good time, and we thank the BCM drilling crew and Oriole's field team for all their hard work. We very much look forward to the results from the remaining holes later this month and the revised independent consultant's updated MRE for MB01-S thereafter in early Q3-2026."

Figure 1. Plan view of MB01-S showing the Step-out programme drill hole collar locations, selected best results from MBDD043 and MBDD044, previously reported best intersections from MBDD040 to MBDD042, drill collars from Phase 1 drilling and gold mineralised wireframes for the current 870koz Au MRE within a US$3,200/oz pit shell.

The Step-out diamond drilling programme at the MB01-S deposit, which commenced in March 2026 (see announcement dated 31 March 2026), has now been completed for 2,476.80m in 10 holes. It was designed to expand the existing 870,000oz contained gold JORC MRE at MB01-S, by testing the potential extension of the mineralised system. All holes were drilled towards the west (at an azimuth of 270˚ ) and at an inclination of -50˚ , therefore in the same orientation as the majority of holes in the Phase 1 drilling programme (see announcement dated 2 September 2025).

The Company today reports results for holes MBDD043 and MBDD044, which targeted the western extension of MB01-S. Both holes were completed to the west of Phase 1 drilling on fence line N872582 but are offset approximately 25m to the north (i.e. on a Northing of N873607) due to access constraints.

Table 1. Calculated intersections from Phase 3 holes MBDD043 and MBDD044, 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.

These holes have identified two distinct and substantial zones of mineralisation punctuated by higher grading intervals, which is consistent with other notable zones at Mbe.

The 27.20m at 1.69g/t Au intersection from MBDD044, which includes 1.00m at 25.00g/t Au (within the reported 6.00m at 5.81g/t Au 'including' interval), is associated with a zone of brecciated and altered orthogneiss. The orthogneiss in this sequence is highly deformed, evidenced by visible parasitic folding, and the brittle fractures within the breccia zone have been infilled to form NNW-SSE trending sulphide-telluride veinlets that dip steeply to the southwest. The geometry of these veinlets is comparable with the overall mineralised trends identified throughout MB01-S.

Figure 2. Core box photograph showing the higher-grade portion of the 27.20m at 1.69g/t Au intersection in MBDD044, including 1.00m at 25.00g/t Au.

Figure 3. Simplified cross section of fence line N872582 with newly reported results from holes MBDD043 and MBDD044 (noting the ~25m offset to the north compared to the other holes presented). Previously reported best results from holes MBDD010 to MBDD013 and trench line MBT015 are also presented. MBT015 is located approximately 15m to the north of holes MBDD010 to MBDD013, and 10m to the south of holes MBDD043 and MBDD044.

The geometry of the veining implies that the mineralisation in MBDD044 is the along-strike continuation of the 27.80m at 0.79g/t Au intersection previously reported in hole MBDD024 (see announcement dated 22 September 2025), located 180m to the SSE. This, together with other structural data acquired during the Programme, supports a slight rotation of the mineralised wireframes at MB01-S from the current N-S trend to a NNW-SSE orientation, which will be factored into the next MRE update.

Results for the remaining five holes in the Programme are anticipated later this month. Thereafter, Oriole will engage its independent consultant to prepare an updated JORC MRE for the deposit, which currently stands at 870koz contained Au and remains open in all directions, with the publication of the updated MRE expected in early Q3-2026. Any increase to this MRE will also increase the 1.23Moz total resource base at Mbe.

Background on Mbe

After highly encouraging results from infill soil sampling, rock-chip sampling, and trench sampling, a fully funded maiden drilling programme at the MB01-S target was completed in September 2025 for 6,828.40m in 24 holes. Best drilling results included 86.50m at 1.36g/t Au from 22.00m, including 39.40m at 2.00g/t Au (hole MBDD008), 21.30m at 1.61g/t Au from 2.40m (MBDD012) and 6.15m at 19.67g/t Au from 113.50m, including 1.00m at 119.10g/t Au (MBDD019). In October 2025, a maiden MRE was published for the MB01-S deposit of 870,000oz at 1.09g/t, using a US$3,200/oz gold price and a cut-off grade of 0.40g/t Au.

At the MB01-N target, 700m to the northeast of MB01-S, a 2,982.80m drilling programme in 15 holes was completed in February 2026. Best drilling results included 21.70m at 3.13g/t Au including 7.20m at 8.19g/t Au (from hole MBDD026), 56.20m at 0.99g/t Au, including 14.60m at 2.03g/t Au and 24.00m at 0.37g/t Au, including 2.00m at 2.21g/t Au (from hole MBDD039), and 16.10m at 2.49g/t Au including 1.00m at 28.60g/t Au, 2.00m at 6.57g/t Au and 14.80m at 0.73g/t Au (from hole MBDD027). The maiden MRE was published in April 2026 and stands at 360,000oz at 1.05g/t, using a US$3,200/oz gold price and a lower cut-off grade of 0.40g/t Au. This increased the total resource at Mbe which currently stands at 1.23Moz contained Au.

Mineralisation at both deposits remains open in all directions and at depth. MB01-S has recently been targeted by a step out drilling programme which, once all results are received later this month, is expected to lead to an updated MRE in Q3-2026.