$NEXM

NexMetals Mining Corp. (NEXM) filed an SEC Form 8-K — Regulation FD Disclosure. Exhibit 99.1 NexMetals Nearly Triples Selebi North Indicated Mineral Resources to 8.95 Million Tonnes and Increases Inferred Mineral Resources to 9.48 Million Tonnes Total Selebi Mines Mineral Resource Estimate Now at 8.95 Million Tonnes Indicated (412 Million Pounds of Copper Eq

NexMetals Mining Corp. announced a nearly tripled mineral resource estimate for its Selebi North deposit, now at 8.95M tonnes indicated (412M lbs CuEq) and 41.95M tonnes inferred (2.3B lbs CuEq). Drilling suggests a potential link with the Selebi Main deposit, with updated grades and economic inputs. The company is reviewing project funding options and advancing a PEA for its Selkirk asset.

NexMetals reported a 72% increase in the Selebi Main inferred mineral resource to 32.47 Mt, with grades of 1.53% Cu and 0.98% Ni. Contained metal increased by 55% for Cu and 91% for Ni compared to 2024. The growth was primarily driven by new drilling in the Flexure Zone. The company used US$5.10/lb for Cu and US$9.10/lb for Ni in its estimates. The Selebi North MRE will be reported separately.

NexMetals Mining Corp. (NEXM) filed an SEC Form 8-K — Regulation FD Disclosure. Exhibit 99.1 NexMetals Reports 72% Increase in Selebi Main Mineral Resource of 32.47 Mt @ 1.53% Cu, 0.98% Ni Inferred, Selebi North Mineral Resource Estimate Pending Updated Selebi Main mineral resource estimate establishes 495,400 contained tonnes of copper and 316,800 contained

NexMetals Mining Corp. (NEXM) filed an SEC Form 8-K — Regulation FD Disclosure. Exhibit 99.1 NexMetals Reports 7.55 Metres of 6.48% CuEq (2.70% Cu, 1.83% Ni) in SMD-26-219, Visual Intercept SMD-26-217 Intersects Three Mineralized Zones and Extends High-Grade Trend to Approximately 1.5 Kilometres Vancouver, British Columbia, September 23, 2026 – NexMetals Min

NexMetals Mining Corp. (TSXV: NEXM, NASDAQ: NEXM) reported assay results from drill holes SMD-26-219 and SMD-26-217 at its Selebi Main deposit in Botswana. SMD-26-219 returned 7.55 metres grading 6.48% CuEq, while SMD-26-217 intersected three mineralized zones, extending the high-grade trend to 1.5 kilometres. The company is on track to complete its 2026 Mineral Resource Estimate in Q3 2026.

NexMetals Mining Corp. (TSXV: NEXM, NASDAQ: NEXM) filed an independent NI 43-101 technical report for its 2026 Mineral Resource Estimate for the Selkirk copper-nickel-PGE project in Botswana, effective June 22, 2026. The estimate includes 78.2 Mt Indicated at 0.66% CuEq (1.1 bln lb CuEq) and 15.1 Mt Inferred at 0.60% CuEq (200 mln lb).

NexMetals Mining said its Selkirk copper-nickel-PGE project in Botswana now has about 1.1 billion lb. copper equivalent (CuEq) in indicated resources after converting nearly 70% from inferred, driven by re-assaying and twin drilling. NexMetals reported 78.2 million tonnes at 0.66% CuEq, plus 15.1 million inferred tonnes at 0.60% CuEq. The upgrade raises contained CuEq inventory 63% vs. 2024, mainly from improved recoveries and adding payable cobalt, silver and gold.

NexMetals Mining Corp. (NEXM) filed an SEC Form 8-K — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers. false 0000795800 0000795800 2026-06-15 2026-06-15 iso4217:USD xbrli:shares iso4217:USD xbrli:shares UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of the Securities Exchange Act of 1934 Date of Repor

NexMetals Mining Corp. said final metallurgical analytical results from Selkirk Mine in Botswana confirm its copper and nickel concentrates meet commercial smelter specifications. The company reported very low deleterious elements and payable metals (including Pt, Pd, and expected payable Co, Ag, and Au), supporting a potential low-capital restart without an on-site smelter. NexMetals plans to incorporate results into a new mineral resource estimate in Q2 2026.