Greenheart Gold Confirms Mineralisation at Majorodam and Updates Project Portfolio

• Diamond drilling at Majorodam confirms at least 800-metre mineralised zone at Heuvel Main and identifies second zone at Heuvel East, with key intercept of 11.5 metres grading 1.34 grams per tonne gold
• 3,000-metre trenching programme commenced at Tosso Creek following soil sampling that identified gold anomaly extending over 5 kilometres in length
• Company acquires option on Gold Hill project in Guyana, located 13.5 kilometres from Aris Mining's Toroparu deposit containing 6.5 million ounces of gold resources
• Termination of Tamakay and Abuya options following exploration programmes that confirmed narrow high-grade veins and insufficient results respectively
• Company strategy focuses on assessing projects for drill readiness within 10 to 12 months or replacing with new opportunities

Greenheart Gold Inc. (TSXV: GHRT) (OTCQX: GHRTF) is a gold exploration company operating in the Guiana Shield of South America. The company's management team includes former executives and exploration personnel from Reunion Gold, who were involved in the discovery and delineation of the Oko West deposit in Guyana. Greenheart Gold maintains a portfolio of early-stage exploration projects in Guyana and Suriname targeting orogenic gold deposits.

Majorodam Diamond Drilling Results at Heuvel Main and Heuvel East Zones

The company completed an 11-hole diamond drilling programme at Majorodam, totalling 2,335.6 metres, designed to follow up on four intercepts from earlier reverse circulation drilling completed in the first quarter of 2025 and previously announced trench results. The project is located 8 kilometres south of Zijin's Saramacca mine, a satellite operation to the Rosebel gold mine and mill. Results confirmed a north-south trending gold mineralised system at Heuvel extending at least 800 metres, as well as a second mineralised zone approximately 500 metres east called Heuvel East.

At Heuvel Main, hole MAJD25-011 was drilled at the midpoint of the zone and intersected 11.5 metres grading 1.34 grams per tonne gold, including 5.0 metres grading 2.77 grams per tonne, approximately 50 metres below a previously reported trench that returned 18.0 metres at 6.39 grams per tonne. Hole MAJD25-002 at the southern end intersected 12.3 metres grading 0.82 grams per tonne gold, including 5.5 metres grading 1.58 grams per tonne. Hole MAJD25-005 at the northern end intersected 5.0 metres grading 1.77 grams per tonne.

At Heuvel East, hole MAJD25-006 intersected 13.0 metres grading 1.29 grams per tonne gold, including 5.5 metres grading 2.3 grams per tonne. The company stated that whilst gold mineralisation was confirmed in each of the four target areas, the grade and tenor of some diamond drill intercepts did not match that of the targeted reverse circulation and trench results. The company believes that indicators of a mineralised system are present at Majorodam, although the structural controls on gold mineralisation are more complex than the initial interpretation suggested. Analysis of results, combined with structural measurements from drill core and detailed mapping supported by high-resolution drone magnetics, indicate that gold mineralisation may be controlled by shallow-plunging fold hinges deformed within a north-south shear at Heuvel Main. The diamond drill rig remains at Majorodam with drilling planned to recommence before the end of November to test the updated geological model.

Tosso Creek Project Trenching Programme and Soil Sampling Results

Exploration at the Tosso Creek project includes infill soil sampling at 400-metre by 50-metre spacing. Results continue to define several large gold anomalies, with the largest extending over 5 kilometres in length and up to 500 metres in width. The soil anomalies align with volcano-sedimentary units in the western and northwestern portions of the project area, as well as anomalies along a granite contact that strikes northeast in the southern section.

An excavator has been mobilised to the project and a 3,000-metre trenching programme has commenced over the strongest soil anomalies. A Lidar survey has been completed, and a high-resolution drone magnetics survey is anticipated to be completed by year end. Based on results from the trenching programme, the company expects to commence drill testing in the first half of 2026.

The trenching work represents the next phase of exploration following the soil sampling programme. Trenching allows examination of bedrock beneath soil cover to assess the nature and grade of mineralisation before drilling. The company has not yet released results from the ongoing trenching programme.

Portfolio Management with Gold Hill Project Acquisition and Termination of Tamakay and Abuya Options

The company entered into an option agreement to acquire a 100% interest in the Gold Hill project in Guyana. The property is located approximately 13.5 kilometres east of Aris Mining Corporation's Toroparu project. Aris Mining released a Preliminary Economic Assessment in October 2025 outlining a deposit containing 5.3 million ounces in measured and indicated resources and 1.2 million ounces in inferred resources at Toroparu.

The Gold Hill project consists of mineral rights covering approximately 40 square kilometres in the Mazaruni mining district in northwestern Guyana. The project area is deformed around a dolerite intrusion and exhibits similar open folding to that observed at the Toroparu deposit. The property contains multiple gold-bearing vein systems, and artisanal saprolite and alluvial mining activity is present in the area.

The company has terminated option agreements on its Tamakay and Abuya projects in Guyana. At Tamakay, a 1,473-metre diamond drilling programme confirmed the high-grade nature and continuity of quartz veins subject to historic artisanal mining, however intercepts were relatively narrow with little evidence of gold mineralisation in wall rock or more extensive sheeted vein systems. At Abuya, 3,263 metres of trenching produced no meaningful results. The company stated that these decisions are consistent with its strategy to assess projects and drill prospective targets within 10 to 12 months or move on from projects that do not meet expectations.

Next Steps and Upcoming Milestones

The company plans to recommence drilling at Majorodam before the end of November to test an updated geological model based on structural measurements from drill core and detailed mapping. At Tosso Creek, the ongoing 3,000-metre trenching programme over soil anomalies is expected to provide data for drill targeting, with potential drilling in the first half of 2026 subject to trenching results. The company will also advance initial exploration work at the Gold Hill project in Guyana.

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