Ms. Elaine Ellingham reports

OMAI GOLD MOBILIZES SIXTH DRILL TO ADVANCE EXPLORATION TARGETS

Omai Gold Mines Corp. is mobilizing a sixth diamond drill to the Omai project site in Guyana to focus on exploration targets. An initial 5,000-metre drill program is planned, with the first target being the BBH area, where an eight-hole program will explore an area that has seen successful trenching and drilling results in previous programs.

Elaine Ellingham, president and chief executive officer, commented: "With our preliminary economic assessment (PEA) completed, infill and expansion drilling continues on Wenot with five diamond drills. This sixth drill will allow us to pursue a number of exploration targets, identified by a combination of geophysics, trenching and, in some cases, previous drilling. We know that there are several areas in the immediate vicinity of the Gilt and Wenot deposits that are rich in gold occurrences and certain untested geophysics anomalies with similar signatures to those of our main deposits. Much of our work to date has focused on Wenot mainly because we met with early success and were able to expand the resource very quickly, through successive NI [National Instrument] 43-101 mineral resource estimates followed by a significant PEA. Additional near-surface deposits could further enhance the economics of the project with higher-grade, early mill feed. The team has been anxious to drill some of these additional gold targets, and, with the PEA completed, we can bring this forward as one of our priorities."

This 5,000-metre drill program will start on the BBH target, located west of the Gilt deposit. BBH is a broad target area extending along a strike of approximately 600 metres. It is defined by a series of trenches, shallow drill holes and historical data, all of which have identified numerous occurrences of significant gold mineralization, including instances of high-grade gold mineralization at surface as described below.

In a few areas along the BBH trend, a series of flat-lying or variably shallow-dipping, saprolite-hosted veins, interpreted as ladder veins, have been trenched, with high gold values returned. These ladder veins appear to span between two northeast-trending structures. Highlights of the 2022 trenching included: Trench OTR-03 at the western end of BBH target, where 14 samples were collected with six assaying between one and three grams per tonne gold, one assayed 8.35 g/t Au and three assayed over 15 g/t Au (including one grading 24.3 g/t Au); and Trench OTR-02, located 300 metres to the east of OTR-03 had all 11 samples assaying over 1.5 g/t Au and half of them assaying over 6.0 g/t Au. Three of these samples assayed over 10 g/t Au, with the highest sample assaying 21.3 g/t Au (news release dated Feb. 24, 2022). Trenching in 2022 also exposed old underground workings (estimated around 1948), in which the series of narrow high-grade veins in the saprolite can be traced into fresh rock.

Initial drilling by the company in 2021 intersected 1.7 g/t Au over 7.5 m and 3.15 g/t Au over 3.0 m in hole 21ODD-019; nearby, a historic drill hole intersected 1.9 g/t Au over 3.0 m, 2.14 g/t Au over 9.0 m and 0.98 g/t over 3.0 m. In late 2025, seven wide-spaced drill holes tested the interpreted 600-metre trend of this BBH target area. All but one hole from this program intersected gold mineralization. The highlight from this drilling included 20.33 g/t Au over 5.3 m, including 35.61 g/t Au over 3.0 m intersected at a vertical depth of only 50 m, in hole 131 (news release Dec. 8, 2025).

The extent of gold mineralization along the BBH target area provides strong incentive to expand the drilling in this area with the goal of identifying a new near-surface gold deposit. Drilling programs are being planned on additional exploration targets on the property.

About Omai Gold Mines Corp.

Omai Gold Mines is a Canadian gold exploration and development company focused on rapidly expanding the two orogenic gold deposits at its 100-per-cent-owned Omai gold project in mining-friendly Guyana, South America. The company has established the Omai gold project as one of the fastest-growing and well-endowed gold camps in the prolific Guiana Shield.

On Aug. 19, 2026, Omai announced a preliminary economic assessment (PEA) that includes the large Wenot open-pit deposit and the adjacent Gilt underground deposit. The PEA supports a mine plan to produce 6.3 million ounces of gold over an 18-year mine life. Average gold production is projected at 351,000 ounces per year. At the $3,600-per-ounce base case, this supports a $4-billion net asset value discounted at 5 per cent. This PEA is based on a mineral resource estimate of 2.5 million ounces indicated averaging 2.04 g/t Au in 38.1 million tonnes and 5.5 million ounces inferred averaging 1.59 g/t Au in 106.6 million tonnes. Drilling on the 50,000-metre drill program is ongoing with five rigs.

As a past producer, Omai significantly benefits from both the historical record of economic gold extraction and the existing infrastructure including a cleared site, an on-site airstrip, a tailings facility, known metallurgy, and road connections to the two largest cities in Guyana (Georgetown and Linden).

Qualified person

Elaine Ellingham, PGeo, is a qualified person under NI 43-101, Standards of Disclosure for Mineral Projects, and has reviewed and approved the technical information contained in this news release. Ms. Ellingham is a director and officer of the company and is not considered to be independent for the purposes of NI 43-101.

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