Omai Gold Files NI 43-101 Technical Report Supporting an Updated Mineral Resource Estimate on Its Omai Gold Property in Guyana

Executive Summary

• Omai Gold Mines Corp. filed a NI 43‑101 Technical Report confirming a substantial increase to its Wenot Deposit resources – Inferred resources rose 130% to 3.717 M oz Au and Indicated resources grew 16% to 970,000 oz Au.
• The updated combined Mineral Resource Estimate (MRE) now totals approximately 6.538 M oz Au (2.121 M oz Indicated + 4.382 M oz Inferred), representing a ~70% increase in ounces versus the February 2024 MRE.
• The company is commencing work on an updated Preliminary Economic Assessment (PEA) expected in early 2026, with drilling programs ongoing to further expand and upgrade resources.

Key Details

• Technical Report: NI 43‑101 Technical Report dated October 9 2025 filed on SEDAR+; prepared under supervision of Eugene Puritch, P.Eng., FEC, CET (independent Qualified Person).
• Wenot Deposit – Inferred: 3,717,000 oz Au in 63.4 Mt at 1.82 g/t Au (130% increase).
• Wenot Deposit – Indicated: 970,000 oz Au in 20.7 Mt at 1.46 g/t Au (16% increase).
• Grade Adjustments: Average grades decreased modestly due to higher gold price assumption ($2,500/oz vs $1,850/oz) allowing a lower cutoff (0.30 g/t vs 0.35 g/t).
• Depth & Geometry: ~60% of Wenot resources lie >350 m below surface; ~30% located west of historic open pit, favorable for initial mining. Expansion potential along ≥2.5 km shear corridor.
• Gilt Creek Deposit – Indicated (baseline): 1,151,000 oz Au in 11.1 Mt at 3.22 g/t Au (Feb 2024 figures).
• Gilt Creek Deposit – Inferred (baseline): 665,000 oz Au in 6.2 Mt at 3.35 g/t Au (Feb 2024 figures).
• Historical Context: Omai Mine produced >3.7 M oz Au (1993‑2005); existing infrastructure and upcoming road connections to Georgetown & Linden enhance project economics.
• Future Plans: Updated PEA being prepared; expected early 2026. Four active drill rigs targeting resource optimization, deposit limits, and potential near‑surface satellite deposits.

Notable Quotes

• “The significant expansion of our Wenot Mineral Resource underscores the high‑grade, low‑cost nature of Omai’s gold endowment and positions us strongly for an updated PEA in early 2026,” – Elaine Ellingham, President & CEO.