Mineral Resources

NI 43-101 Mineral Resource Estimates

On April 14, 2026, Omai Gold Mines announced an updated Mineral Resource Estimate (“MRE”). The MRE includes expansions to both the Wenot Deposit and Gilt Deposit. 

Most significantly, the Wenot Indicated MRE increased 49.8% to 1,453,000 ounces (“oz”) of gold with an average grade of 1.59 g/t Au, contained in 28.4 million tonnes (“Mt”) and the Wenot Inferred MRE increased 7.6% to 3,999,000 oz grading 1.35 g/t Au, contained in 92.4 Mt.  

Similarly, the adjacent Gilt Deposit saw an overall increase in ounces over the previous MRE. Gilt’s Inferred MRE increased 120% to 1,465,000 oz averaging 3.22 g/t Au (in 14.2 Mt), while the Indicated MRE decreased by 9.5% to 1,042,000 oz averaging 3.33 g/t Au (in 9.7 Mt). 

Table 1. April 2026 Mineral Resource Estimates (Please review "Notes to Accompany the 2026 MRE" below the tables for assumptions and additional information)

Notes to Accompany the April 2026 Mineral Resource Estimate:

1. The effective date of this Mineral Resource is April 7, 2026.
2. The Mineral Resources were estimated in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), Standards on Mineral Resources and Reserves Definitions (2014) and Best Practices Guidelines (2019).
3. Rock density averages 2.69 t/m³ for Wenot and 2.92 t/m³ for Gilt.
4. Open pit resources have been constrained to a conceptual pit shell using Whittle software and underground blocks were constrained by an underground shape optimizer using Deswik (DSO) software.
5. A gold price of US$3,000/oz was used.
6. Process gold recoveries for Wenot are assumed to be 90% for Alluvium/Saprolite and 92% for Transition/Fresh Rock and for Gilt are assumed to be 92%.
7. Open pit operating costs were assumed to be $2.40/t for soft rock material mining, $3.00/t for fresh rock mining, $8.93/t for Alluvium/Saprolite processing, and $14.62/t for Fresh Rock processing.  A cost of $3.25/t was used for G&A.  All costs are assumed to be US$.
8. Mineral Resources are reported at cut-off grades of 0.20 g/t Au for soft rock, 0.30 g/t Au for hard rock within the open pit, and 1.70 g/t Au for underground shapes.     
9. The Wenot pit assumed an overall slope angles of 30° for soft rock and 50° for the fresh rock. Wenot resources assume the recovery of a crown pillar below the pit shell.
10. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
11. The estimate of Mineral Resources may be materially affected by environmental, permitting, legal, title, taxation, socio-political, marketing, or other relevant issues.
12. Numbers have been rounded to the nearest thousand tonnes and ounces. Differences in totals may occur due to rounding.
13. The cut-off date of the supporting geological database is March 12, 2026.
14. The Wenot Mineral Resource Estimate incorporates 24,484 composites from 699 diamond drill holes totalling 36,133 m of core within the mineralized wireframes. The Gilt Mineral Resource Estimate incorporates 6,125 composites from 50 diamond drill holes, totalling 6,091 m of core within the mineralized wireframes.
15. Composite gold grades were assessed separately for Wenot and Gilt and were capped at values between 11.5 g/t and 40 g/t gold.
16. Grade interpolation methods were Ordinary Kriging for Wenot and Inverse Distance Cubed (ID3) for Gilt.
17. Rock density was applied using average values of lithological units based on 209 measurements of Wenot drill core and 190 measurements of Gilt drill core.
18. The Mineral Resource has been classified in the Indicated and Inferred categories, using reference drilling spacing of 40-70 m for Indicated and up to 100 m of extrapolation distance for Inferred.
19. Mr. Alan J. San Martin, P.Eng. from SLR Consulting (Canada) Ltd., is the Qualified Person (QP) for this Mineral Resource Estimate. 

Table 2. Comparison between Wenot April 2026 MRE and August 2025 MRE 

Table 3. Comparison between Gilt April 2026 MRE and August 2025 MRE