NexMetals lifts Selkirk resource 70% to 1.1B lb copper equivalent

Indicated Resource Totals 78.2 Mt grading 0.66% CuEq (0.21% Ni, 0.23% Cu, 0.012% Co, 0.10 g/t Pt, 0.42 g/t Pd, 0.05 g/t Au and 0.72 g/t Ag), Enhancing Scale and Open Pit Development Potential Vancouver, British Columbia--(Newsfile Corp. - June 24, 2026) - NexMetals Mining Corp. (TSXV: NEXM) (NASDAQ: NEXM) (the " Company " or " NEXM ") is pleased to announce an updated Mineral Resource Estimate (" 2026 MRE ") for its Selkirk Project (" Selkirk " or the " Project ") in Botswana. Selkirk is a past-producing copper-nickel-platinum group elements (" PGEs ") project located approximately 75 kilometres northeast of the Company's flagship Selebi Project. The 2026 MRE, completed by The MSA Group (" MSA ") in Johannesburg, South Africa, increases the Project's contained copper equivalent (" CuEq ") metal inventory by approximately 63% and reflects a significant conversion of Mineral Resources from the Inferred to Indicated category following a successful re-assaying and twin drilling campaign.

The 2026 MRE represents an important technical milestone for the Selkirk Project, enhancing resource confidence and reducing development risk. Highlights: Approximately 1.1 billion pounds of CuEq Mineral Resources in the Indicated category with 78.2 Mt grading 0.66% CuEq (0.21% Ni, 0.23% Cu, 0.012% Co, 0.10 g/t Pt, 0.42 g/t Pd, 0.05 g/t Au and 0.72 g/t Ag) . Approximately 200 million pounds of CuEq Mineral Resources in the Inferred category with 15.1 Mt grading 0.60% CuEq (0.18% Ni, 0.21% Cu, 0.010% Co, 0.09 g/t Pt, 0.40 g/t Pd, 0.05 g/t Au and 0.77 g/t Ag).

Key drivers of the increase from the 2024 Mineral Resource Estimate (the "2024 MRE") include: Significant improvement in metallurgical recoveries resulting in higher expected payabilities; Inclusion of cobalt, silver and gold as payable metals, none of which w