Greenheart Gold drills 56.0 m @ 0.97 g/t Au, 7.0 m @ 4.57 g/t Au at Tosso Creek

Longueuil, Québec--(Newsfile Corp. - August 20, 2026) - Greenheart Gold Inc. (TSXV: GHRT) (OTCQX: GHRTF) (the "Company" or "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 Projec