Greenheart Gold Commences Initial Diamond Drill Program at the Tosso Creek Project, Suriname, Targeting Below Recent Trench Results That Include Intervals of 56.0 M @ 0.97 g/t Au and 7.0 M @ 4.57 g/t Au

Greenheart Gold Inc. ("Greenheart Gold") is pleased to announce that a 2,000 meters (m) diamond drilling program has commenced at its Tosso Creek Project in Suriname. This initial program is underway at the Walaba target, with drilling at the Swalanga target to follow. The program is designed to evaluate structural controls on gold mineralization, demonstrate continuity of mineralization at depth, and provide additional geological and structural data for subsequent drill planning. Exploration completed to date, including soil sampling, trenching, geological mapping, LiDAR interpretation and drone magnetics, has outlined four main target areas at Maconia, Swalanga, Walaba and Sevil (see Figure 1), with additional zones of interest planned for follow-up. Highlights A 2,000 m diamond drilling program has now commenced at the Walaba target, with drilling at the Swalanga target to follow. A broad gold-mineralized zone has been identified at Walaba, where trench results include 52.0 m @ 0.77 grams per tonne of gold (g/t Au) in TOST26-021A, including 4.0 m @ 1.68 g/t Au and 6.0 m @ 1.29 g/t Au (see Table 1). Trench TOST26-024 at Walaba intersected 7.0 m @ 4.57 g/t Au (including 4.0 m @ 7.89 g/t Au), and 23.0 m @ 0.86 g/t Au (including 5.0 m @ 2.79 g/t Au), indicating the potential for higher-grade mineralized shoots within, or immediately adjacent to, the broader mineralized zone. A significant new trench result at the recently identified Swalanga target, located approximately 1 kilometer (km) east of Walaba, returned 56.0 m @ 0.97 g/t Au in TOST26-030A, including 11.0 m @ 1.53 g/t Au, 8.0 m @ 1.25 g/t Au and 16.0 m @ 1.01 g/t Au. Geology The Tosso Creek Project is located near the southern end of the Paramaka Formation, a regionally extensive sequence of metavolcanic and metasedimentary rocks that hosts numerous artisanal mining areas, including the Sara Kreek gold fields, which are located to the northwest of the project area. Current geological interpretation indicates that the Tosso Creek Project is underlain by a deformed volcano-sedimentary sequence comprising mafic volcanic units, felsic volcaniclastic rocks, sedimentary units and local quartz-schist domains, which are intruded by diorite to granitoid bodies. Mapping and trench observations indicate that gold mineralization is structurally controlled and associated with quartz-vein development, lithological contacts, zones of enhanced strain and permeability, and sericite-silica-pyrite alteration. In the eastern portion of the project, mineralization appears more strongly associated with silicification, higher vein density and increased strain, while western mineralization is less consistently silicified but remains closely related to vein density and structural preparation. Walaba Target The Walaba target is located in the central-western part of the project area and has been outlined by anomalous gold-in-soil results and follow-up trenching. Results received to date define a broad, north-northwest-trending zone of gold mineralization that remains open along strike to the south. Recent trench results from Walaba include 52.0 m @ 0.77 g/t Au in TOST26-021A, including 4.0 m @ 1.68 g/t Au and 6.0 m @ 1.29 g/t Au; 7.0 m @ 4.57 g/t Au in TOST26-024, including 4.0 m @ 7.89 g/t Au; and 23.0 m @ 0.86 g/t Au in TOST26-024, including 5.0 m @ 2.79 g/t Au. These results, in addition to the previously released results (see the Company's press release February 23, 2026) highlighted in Table 2, support the interpretation of a broad mineralized corridor with potential for higher-grade shoots within, or immediately adjacent to, the broader mineralized envelope. Swalanga Target Swalanga is a recently identified target located approximately 1 km east of the Walaba target and appears to have a similar north-northwest trend. The target was initially defined by coherent gold-in-soil anomalies and h...