Omai Gold Drills High-Grade Zone at East Wenot, Intersecting 11.07 g/t Au over 14.7m, Including 34.31 g/t Au over 4.3mToronto, Ontario--(Newsfile Corp. - December 8, 2025) - Omai Gold Mines Corp. (TSXV: OMG) (OTCQB: OMGGF) ("Omai Gold" or the "Company") is pleased to announce assay results from the current drilling program at its 100% owned Omai Gold Project in Guyana, South America. Significant mineralization was intersected in central Wenot (13.54 g/t Au over 13.3m in Hole 145W) and in a new wide high-grade zone at East Wenot (11.07 g/t Au over 14.7m in Hole 142)). The remaining results from the satellite targets are also reported (Table 1). A total of 79 holes (35,300m) have been completed on the Omai project in 2025. Of these, 30 holes (13,250m) completed or underway on Wenot, are not included in the recent August 2025 updated Mineral Resource Estimate ("MRE"). These will contribute to an updated MRE planned for early 2026, in advance of the updated Preliminary Economic Assessment ("PEA") expected in H1 2026. Five rigs are currently drilling on the Wenot deposit, continuing to focus on areas that have the potential to further expand the resource and optimize the upcoming PEA. The Company is pleased to report that it has exceeded its target of completing an additional 10,000m of drilling, post the August MRE, by year end. Highlights* from the recent drilling include: Hole 25ODD-142 (East Wenot)11.07 g/t Au over 14.7mIncluding 34.31 g/t Au over 4.3mHole 25ODD-145W (Central Wenot)13.54 g/t Au over 13.3mIncluding 27.82 g/t Au over 6.2mIncluding 63.17 g/t Au over 2.2m2.01 g/t Au over 15.0mHole 25ODD-144 (East Wenot)1.11 g/t Au over 31.6m0.98 g/t Au over 12.0m0.99 g/t Au over 13.0mHole 25ODD-146 (East Wenot)6.62 g/t Au over 2.4m1.02 g/t Au over 16.1mHole 25ODD-140 (Camp Zone)2.63 g/t Au over 5.5mIncluding 6.06 g/t Au over 2.3mElaine Ellingham, President & CEO commented, "We are excited to see a very significant new zone at the east end of Wenot, where there has been limited drilling in the past. The intersection of 11.07 g/t Au over 14.7m in Hole 142 represents a spectacular new zone and follow-up drilling is underway. We greatly accelerated drilling this year at Omai and set a goal of completing an additional 10,000m of drilling on Wenot prior to year end and are pleased to announce that we have already exceeded this goal. An additional 30 holes have been completed or are currently underway on Wenot and these additional Wenot holes will contribute to a planned updated Mineral Resource Estimate, which will be integrated into the updated PEA planned for H1 2026. Results are pending for the majority of these new holes but are expected shortly.The additional Central Wenot drilling continues to intersect impressive gold zones, as exemplified in holes 145w and 144 reported today. In particular, the intersection of 13.54 g/t Au over 13.3m in hole 145w illustrates Wenot's potential for a very robust open pit mine plan. The focus of the post-August drill program has been to explore and delineate gold zones within the southern sedimentary sequence that have seen less drilling. However, we continue these holes to the north in order to also drill the CQFP and "Dike Corridor" zones that constitute the major gold zones at Wenot. As a result, this drilling has multiple purpose:it is expected to further increase the Wenot resource, to contribute to reducing the strip ratio in the upcoming PEA, and to upgrade some of the Inferred MRE to Indicated MRE in the major gold zones." Wenot Drill ResultsTwo significant new gold intersections at East Wenot, beyond the area of the historical pit, indicate high potential for further expansion of the Wenot deposit at the eastern end. Of note, hole 25ODD-142 intersected 11.07 g/t Au over 14.7m at a vertical depth of approximately -240m. A second hole 25ODD-146 above intersected 1.02 g/t Au over 16.1m at a vertical depth of - 210m. Shallow historical drilling by Placer Dome in the early 1990s intersected the interpreted up dip equivalent of this zone, including 1.28 g/t Au over 21.0m, 3.66 g/t Au over 7.9 m, 7.58 g/t Au over 3.0 m and 2.33 g/t Au over 10.5m, all at less than -130m depths. The location of this new zone suggests that the central contact and central quartz feldspar porphyry unit (CQFP) may dip to the south in this eastern area. These holes tested this concept and appear to have successfully proven this. The Wenot gold zones, the contact, CQFP and other main zones are generally near vertical, to slightly north dipping. An additional drill hole is underway to further explore this new high-grade zone at the eastern end of the deposit. Holes 25ODD-142 and 25ODD-146 were drilled on East Wenot in an area more sparsely explored. The primary objective was to test continuity of the mineralized zones previously intersected in 22ODD-046 (50m to the west), in order to extend mineralization in this area. Hole 142 was drilled from the north and intersected a couple of minor gold zones with