Omai Gold Mines (OMG) Corporate Presentation summary

Project overview and resource expansion

• Major gold project in Guyana with two adjacent orogenic gold deposits: Wenot (open pit) and Gilt Creek (underground).

• New mineral resource estimate (Aug 2025): 4.4 Moz inferred @ 1.95 g/t Au, 2.1 Moz indicated @ 2.07 g/t Au, representing a 96% increase to Wenot resources.

• Combined new MRE and past production exceed 10 million ounces of gold.

• Over 25,000m drilled in 2025, with an additional 15,000m planned before year-end, focusing on resource expansion and PEA optimization.

• Updated PEA to incorporate expanded Wenot superpit and Gilt Creek underground, targeting a significantly larger mine plan.

Geology and exploration upside

• Wenot deposit features multiple near-vertical gold zones across a 450m width, with significant unmined zones and expansion potential along strike and at depth.

• Grades and widths increase with depth, supporting potential for underground mining.

• Gilt Creek is a compact, high-grade, intrusion-hosted deposit with 2/3 of resources in the indicated category and open at depth.

• Ongoing drilling is testing deep Wenot potential, with current holes reaching 1860m, targeting extensions 600-700m below previous drilling.

• Multiple expansion and exploration targets identified, including satellite pits and strike extensions.

Operational and jurisdictional advantages

• 100% owned in a mining-friendly jurisdiction; Guyana ranked 9th globally for mining investment attractiveness.

• Brownfields site with existing infrastructure: paved road access, skilled workforce, two tailings facilities, and a 1 km airstrip.

• Fast-track permitting as a brownfields project; environmental permit granted Nov 2024.

• Government and community support for redevelopment, with the mine previously employing over 1,000 people and significantly impacting GDP.

• Hydropower potential within 30km and ongoing infrastructure upgrades.