NexMetals Mining Corp.

For the period ended Jun 24, 2026. Filed Jun 25, 2026.

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A notice of a major event between regular reports, such as results, a deal or a change of executives. It is often the first formal record of the news.

Jun 24, 2026 · Filed Jun 25, 2026

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NEXM$1.27+5.8%Stored close · as of Nov 6, 2026

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EX-99.1 · Notes:

Notes:

1.	All tabulated data have been rounded and as a result minor computational errors may occur.
2.	Mineral Resources, which are not Mineral Reserves, have no demonstrated economic viability. There is no guarantee that that all or any part of the Mineral Resource will be converted into a Mineral Reserve. The estimate of Mineral Resources may be materially affected by geology, environment, permitting, legal title, taxation, socio-political, marketing, or other relevant issues.
3.	kt = thousand tonnes, Mlbs = Million pounds, koz = thousand ounces.
4.	The 2026 MRE has been prepared in accordance with the CIM Definition Standards (2014) and CIM Best Practice Guidelines (2019) with an effective date of June 22, 2026.
5.	Mineral Resources are reported at a cut-off value of US$25/t NSR (Net Smelter Return) defined as received value of final metal recovered minus off-site costs.
6.	Mineral Resources are estimated using long-term prices of US$9.10/lb Ni, US$5.10/lb Cu, US$20.00/lb Co, US$1,800/oz Pt, US$1,550/oz Pd, US$3,600/oz Au and US$52.00/oz Ag. The same metal prices were used in CuEq and NSR calculations.
7.	Mineral Resources are estimated using nickel, copper, cobalt, platinum, palladium, gold and silver recoveries of 54%, 88%, 53%, 56%, 78%, 72% and 61%, respectively, derived from metallurgical studies which consider a two-concentrate scenario.
8.	Payabilities and off-site treatment and refining costs were derived from an independent marketing study commissioned by NexMetals.
9.	The CuEq value was calculated based on relative recovered value received for each metal excluding costs. Received value for each metal was calculated using the formula: in-situ gradeconcentrator recoverypayabilitymetal price. The ratio between received copper value and total other metal value was then used to calculate CuEq, i.e., CuEq = (1+value excluding Cu / Cu value) Cu grade.
10.	Bulk density has been estimated in the block model based on an extensive data set of measurements taken from drillhole cores.
11.	Mineral Resources are reported within an optimized pit shell using NSR values, mining cost of US$3/tonne (additional US$0.008 per metre depth from pit rim), concentrate costs of US$20/tonne, G&A of US$1.35 per tonne, 45°pit slope to base of partially weathered and 60° in fresh rock.
12.	There are no Mineral Reserves.

Figure 1:3D Block Model of the Selkirk Deposit highlighting the 2026 MRE and against the old open pit shell

The 3D block model highlights the significant advancement of the Selkirk Project through the 2026 MRE. The previous Selkirk Mineral Resource Estimate comprised 789 million lbs of CuEq 1 in the Inferred category with 44.2 Mt grading 0.81% CuEq (0.30% Cu, 0.24% Ni, 0.55 g/t Pd and 0.12 g/t Pt), entirely within the Inferred category. The updated model demonstrates a substantial increase in resource confidence through the conversion of a significant portion of the mineralization to the Indicated category. The model also illustrates a materially expanded conceptual open-pit shell relative to the 2024 MRE, reflecting increased contained metal.

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