Omai Gold drills 5.12 g/t Au over 40.5 m and 2.68 g/t Au over 40.7 m at Wenot

Toronto, Ontario--(Newsfile Corp. - September 1, 2026) - Omai Gold Mines Corp. (TSXV: OMG) (OTCQB: OMGGF) (" Omai Gold " or the " Company ") is pleased to announce assay results from eleven additional diamond drill holes from the ongoing 50,000 metre ("m") drilling program at its 100% owned Omai Gold Project in Guyana, South America. Each drill hole on the Wenot Deposit encountered multiple gold zones. Hole 26ODD-193 in central Wenot intersected 11 discrete gold zones including 5.12 g/t Au over 40.5m, which included 11.29 g/t Au over 10.4m at a vertical depth of between -260 to -290m within the prolific Dike Corridor. Given that an economic cut-off grade of 0.3 g/t Au was applied to the Wenot open pit deposit, these intersections are very significant.

Five rigs continue to drill at Omai. To date this year, 74 drill holes have been completed, totalling 35,149m. Hole 26ODD-208, testing the depth potential of the Gilt Deposit, was completed at a downhole depth of 1,438m (~1,200m vertical depth). Samples from the upper part of the hole have been submitted for assaying. Certain selected whole core samples are being prepared for mineral processing testing.

Highlights* from the recent drilling include: (refer to Table 1 for full assay composites and downhole depths):

Hole 26ODD-193 5.12 g/t Au over 40.5m Including 11.29 g/t Au over 10.4m and including 18.35 g/t Au over 4.5m

1.37 g/t Au over 26.0m

1.48 g/t Au over 14.0m

6.45 g/t Au over 2.6m

Hole 26ODD-192 11.16 g/t Au over 3.7m

2.71 g/t Au over 14.0m Including 17.08 g/t Au over 1.3m

4.15 g/t Au over 5.6m

0.97 g/t Au over 35.0m Including 2.20 g/t Au over 7.8m

Hole 26ODD-194 2.20 g/t Au over 14.7m Including 24.79 g/t Au over 0.9m

5.24 g/t Au over 7.9m Including 10.36 g/t Au over 3.5

1.11 g/t Au over 17.9m

6.54 g/t Au over 3.0m

Hole 26ODD-197W 2.68 g/t Au over 40.7m Includes 3.81 g/t Au over 15.7m which includes