GoldQuest intercepts high-grade assays at Romero, Dominican Republic

Vancouver, British Columbia--(Newsfile Corp. - May 28, 2026) - GoldQuest Mining Corp. (TSXV: GQC) (OTCQX: GDQMF) (" GoldQuest " or the " Company ") is pleased to report assay results from five metallurgical drill holes completed at the Company's 100%-owned Romero Gold-Copper Project in San Juan Province, Dominican Republic. The metallurgical holes, LTP-171 through LTP-175, were drilled to provide fresh representative core for the ongoing geo-metallurgical program and bankable feasibility study work. The assay results confirm multiple high-grade gold-copper intervals within the Romero deposit, while metallurgical test work completed to date continues to support conventional processing assumptions and ongoing process design work.

Highlights: High-grade assays from metallurgical drilling: The five-hole program returned several high-grade gold-copper intervals from the central Romero deposit, including 38.6 m grading 45.01 g/t Au, 14.31 g/t Ag and 2.44% Cu in LTP-173, including 26.85 m grading 63.82 g/t Au, 18.93 g/t Ag and 3.23% Cu. Additional strong intercepts: Hole LTP-172 returned 27.55 m grading 17.61 g/t Au, 6.07 g/t Ag and 1.40% Cu, including 10.1 m grading 38.71 g/t Au, 10.80 g/t Ag and 2.76% Cu. Hole LTP-174 returned 30.5 m grading 16.47 g/t Au, 2.79 g/t Ag and 1.59% Cu, including 11.6 m grading 34.46 g/t Au, 4.20 g/t Ag and 2.76% Cu.

Positive local reconciliation: An initial internal reconciliation exercise comparing the new drill results with the resource block model within 10 m diameter cylinders around the metallurgical holes indicates a positive comparison. Further details are provided in the reconciliation section and Table 2 below. Integration into ongoing technical work: The new drilling is being evaluated for integration into the ongoing mineral resource estimate update and bankable feasibility study workstreams.

Metallurgical perfor