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 Mining Corp. (TSXV: NEXM) (Nasdaq: NEXM) (“NEXM”
or the “Company”) is pleased to report assay results from drill hole SMD-26-219 and a new visual intercept from drill
hole SMD-26-217, part of its ongoing surface drilling program at the Selebi Main deposit in Botswana (see Figure 1). The results continue
to support the Company’s data-driven exploration model and highlights the potential for continued growth of the Selebi Main mineralized
system.
SMD-26-219
returned 7.55 metres grading 6.48% CuEq (2.70% Cu and 1.83% Ni), confirming another thick, high-grade massive sulphide intersection along
an emerging high-grade trend that has now been defined over approximately 1.5 kilometres (the “High-Grade Trend”).
SMD-26-217
extended the High-Grade Trend by a further 100 metres toward Selebi North and intersected a combined total of 38.65 metres of disseminated
to massive sulphide mineralization across three zones. The hole represents the deepest significant intercept of mineralization along
the trend and confirmed the Main and Lower Zones, while also, for the first time, intersecting a Third Zone of massive sulphide mineralization
approximately 9 metres below the Lower Zone. Together, the three zones represent one of the thickest mineralized intervals encountered
during the program to date and provide further evidence that the High-Grade Trend continues laterally through the Flexure Zone toward
Selebi North. Assays are pending.
Why
This Matters
| ● | Exceptional
grades continue to define the High-Grade Trend. SMD-26-219 returned 7.55 metres grading
6.48% CuEq, building on a series of thick, high-grade intersections and reinforcing the strength
and consistency of mineralization across the growing trend. |
| ● | The
Trend has been extended toward Selebi North. SMD-26-217 extended the interpreted High-Grade
Trend by approximately 100 metres to approximately 1.5 kilometres. |
| ● | Lower
Zone is demonstrating increasing continuity at depth. Results from SMD-26-213, which
returned 7.45 metres grading 5.69% CuEq (2.52% Cu, 1.54% Ni), and SMD-26-219, together with
the visual intercept in SMD-26-217, strengthen the interpretation of a laterally and vertically
extensive Lower Zone. |
| ● | The
Third Zone introduces a new dimension to the exploration model. Its discovery below the
Lower Zone indicates that the system is more complex than previously interpreted and creates
an additional target opportunity for potential expansion. |
| ● | Widely
spaced step-outs are rapidly building potential tonnage. Continued drilling success beyond
the 2024 Mineral Resource Estimate (“2024 MRE”) demonstrates the potential
for meaningful resource growth at Selebi Main, both within the upcoming 2026 Mineral Resource
Estimate (“2026 MRE”) and beyond its cut-off date. |
| ● | The
system remains open and recent BHEM indicates the High-Grade Trend continues. Borehole
electromagnetic surveying (“BHEM”) indicates that the High-Grade Trend
continues beyond SMD-26-217, supporting further potential laterally and down plunge. Ongoing
drilling and geological modelling will test the extent of all three mineralized zones and
target additional areas of thick massive sulphide mineralization. |
Next
Steps
| ● | The
2026 Mineral Resource Estimate (“2026 MRE”) remains on track for completion
in the third quarter of 2026. Drill holes completed after the resource cut-off date of September
21, including SMD-26-217, will not be included in the 2026 MRE but continue to support the
Company’s strategy of expanding the Selebi resource base through ongoing exploration
success. |
| ● | The
Company has engaged TECT Geological Consulting to develop an integrated three-dimensional
geological and structural model for Selebi North and Selebi Main. The model is expected to
enhance the Company’s understanding of the geological controls of mineralization across
the mining license, support future resource growth and improve drill targeting of thicker,
higher-grade zones, and identify potential regional exploration targets. |
Sean
Whiteford, CEO and Director of the Company, commented: “SMD-26-219 delivered another strong result, with 7.55 metres grading
6.48% CuEq. It is the latest in a series of successful, widely spaced step-out holes that are rapidly defining additional tonnage at
Selebi Main and extending this High-Grade Trend to approximately 1.5 kilometres.
SMD-26-217
extended the trend by a further 100 metres and, for the first time in this area, intersected a third zone of massive sulphide mineralization
below the Main and Lower Zone. The presence of three distinct mineralized zones highlights both the complexity of the Selebi Main system
and the significant potential that remains within the deposit and beyond the areas tested to date. BHEM surveying in SMD-26-217 is complete
and results indicate that the lower zone continues to depth.
The
2026 MRE continues to advance, and our Qualified Persons are working diligently to complete it. The additional time has allowed us to
incorporate results from SMD-26-219 that we believe will add meaningful tonnage and provide a more complete picture of the growth achieved
at Selebi Main. We look forward to sharing the 2026 MRE with the market upon its completion.”

Figure
1: Inclined long section of Selebi Main highlighting the location of drill holes SMD-26-219 and SMD-26-217 relative to the 2024 MRE.
The 2024 Inferred Resource reference in Figure 1 is presented in accordance with NI 43-101, which may not be identical to Inferred Mineral
Resource references under SEC Regulation SK-1300.

Figure
2: SMD-26-217 Core photos. Complete core photographs for the hole are available on the Company’s website.
Detailed
Drilling and BHEM Information
SMD-26-219,
completed to 1956.8 metres, was planned as a step-out hole in the direction of Selebi North and tested the down-plunge extension of the
interpreted trend of thick high grade massive sulphide mineralization. The hole intercepted Main Zone mineralization between 1858.50
to 1878.00 metres. The 19.50-metre-wide zone was dominated by disseminated sulphides including a total of 2.15 metres of massive sulphide
in two narrow intervals. The drillhole intercepted the Lower Zone between 1903.25 and 1916.75 metres. Within this 13.50 metre zone, is
a 7.55 metre interval dominated by semi-massive and massive sulphides. Mineralization at SMD-26-219 is very similar to that seen in SMD-26-213
175 metres away (7.45 m of 2.52% Cu, 1.54% Ni, news release July 22, 2026) and in the recently completed SMD-26-217 step out hole
located 100 metres toward Selebi North
SMD-26-217
was planned to be another down plunge step out hole, testing along the High-Grade Trend. The hole was completed to a final depth of 2050.9
metres. SMD-26-217 drilled three distinct zones of mineralization separated by short intervals of country rock between 1920.30 metres
and 2000.90 metres.
| ● | Main
Zone - (1920.30 metres – 1941.15 metres): Spans a total mineralized interval
of 20.85 metres. The zone is dominated by 19.90m of weakly mineralised medium to coarse
grained amphibolite shist. Two sub-metre intervals, 0.80 meters and 0.15 meters, of massive
sulphide occur in the middle of the zone. |
| ● | Lower
Zone - (1974.75 metres – 1981.35 metres): Intersected a combined total of 5.00
metres of massive sulphides and 1.60 metres of disseminated sulphides, containing abundant
pyrrhotite, chalcopyrite, and magnetite crystals. |
| ● | Third
Zone - (1994.30 metres – 2000.90 metres): At 8.65 metres below the Lower Zone the
drill discovered a new mineralized horizon, featuring 2.30 metres of disseminated to semi-massive
mineralized amphibolite directly underlain by 4.30 metres of massive sulphide comprised
of pyrrhotite and chalcopyrite. |
SMD-26-217
has not only extended the footprint of mineralisation by 100 metres, but it has also showed the mineralization thickening down plunge.
The third zone discovery shows that the Selebi Main deposit continues to dramatically change with each new drill hole highlighting the
potential in the flexure zone between Selebi Main and Selebi North (Figure 2).

Figure
2: Inclined long section of Selebi Main and Selebi North Deposits highlighting the location of drill holes released in this news release,
and 2025-2026 drilling to the 2024 MRE and the expansion of the Flexure Zone. The 2024 Indicated and Inferred Mineral Resources referenced
in Figure 2 is presented in accordance with NI 43-101, which may not be identical to Inferred Mineral Resource references under SEC Regulation
SK-1300.
Table
1: 2026 Surface Drilling Results
| Hole-ID |
|
From
(m) |
|
To
(m) |
|
Length
(m) |
|
Est.
True
Thickness1 |
|
Cu
(%) |
|
Ni
(%) |
|
Co
(%)2 |
|
Zone |
|
CuEq
(%)3 |
| SMD-26-219 |
|
1858.50 |
|
1878.00 |
|
19.50 |
|
18.8 |
|
0.47 |
|
0.49 |
|
0.02 |
|
Main
Zone |
|
1.48 |
| including |
|
1861.20 |
|
1868.00 |
|
6.80 |
|
6.55 |
|
0.67 |
|
0.89 |
|
0.04 |
|
Main
Zone |
|
2.51 |
| *including |
|
1681.20 |
|
1862.80 |
|
1.60 |
|
1.55 |
|
1.53 |
|
2.51 |
|
0.11 |
|
Main
Zone |
|
6.70 |
| *and |
|
1864.20 |
|
1864.75 |
|
0.55 |
|
0.53
|
|
0.06 |
|
2.57 |
|
0.10 |
|
Main
Zone |
|
5.36 |
| SMD-26-219 |
|
1903.25 |
|
1916.75 |
|
13.50 |
|
13.30 |
|
1.69 |
|
1.22 |
|
0.05 |
|
Lower
Zone |
|
4.21 |
| including |
|
1909.20 |
|
1916.75 |
|
7.55 |
|
7.45 |
|
2.70 |
|
1.83 |
|
0.09 |
|
Lower
Zone |
|
6.48 |
| *including |
|
1910.15 |
|
1916.75 |
|
6.60 |
|
6.50 |
|
2.01 |
|
2.02 |
|
0.09 |
|
Lower
Zone |
|
6.17 |
| *including |
|
1910.15 |
|
1912.75 |
|
2.60 |
|
2.55 |
|
1.81 |
|
2.10 |
|
0.10 |
|
Lower
Zone |
|
6.14 |
| *and |
|
1913.25 |
|
1916.75 |
|
3.50 |
|
3.45 |
|
2.43 |
|
2.23 |
|
0.10 |
|
Lower
Zone |
|
7.02 |
| SMD-26-217 |
|
1920.30 |
|
1941.15 |
|
20.85 |
|
20.55 |
|
Ap4 |
|
Ap4 |
|
Ap4 |
|
Main
Zone |
|
Ap4 |
| including |
|
1931.85 |
|
1932.65 |
|
0.80 |
|
0.79 |
|
Ap4 |
|
Ap4 |
|
Ap4 |
|
Main
Zone |
|
Ap4 |
| SMD-26-217 |
|
1974.75 |
|
1981.35 |
|
6.60 |
|
6.40 |
|
Ap4 |
|
Ap4 |
|
Ap4 |
|
Lower
Zone |
|
Ap4 |
| including |
|
1974.25 |
|
1979.00 |
|
4.25 |
|
4.17 |
|
Ap4 |
|
Ap4 |
|
Ap4 |
|
Lower
Zone |
|
Ap4 |
| and |
|
1980.35 |
|
1981.35 |
|
1.00 |
|
0.98 |
|
Ap4 |
|
Ap4 |
|
Ap4 |
|
Lower
Zone |
|
Ap4 |
| SMD-26-217 |
|
1994.30 |
|
2000.90 |
|
6.60 |
|
6.40 |
|
Ap4 |
|
Ap4 |
|
Ap4 |
|
Third
Zone |
|
Ap4 |
| including |
|
1996.60 |
|
2000.90 |
|
4.30 |
|
4.17 |
|
Ap4 |
|
Ap4 |
|
Ap4 |
|
Third
Zone |
|
Ap4 |
1Length
refers to drillhole length and not true width. True widths are estimated where density of drilling is sufficient for an estimation. Some
true widths cannot be estimated due to insufficient drill density.
2Co
is not included in the MRE as cobalt analyses are not consistently available throughout the deposit.
3CuEq
was calculated using the formula CuEq=Cu+2.06*Ni assuming long-term prices of US$10.50/lb Ni and US$4.75/lb Cu, and nickel and copper
recoveries of 72.0% and 92.4%, respectively, derived from metallurgical studies which consider a conceptual bulk concentrate scenario.
4Assays
pending
Table
2: Surface Drilling Collar Information
| HOLE
ID |
|
UTM
East |
|
UTM
North |
|
Elevation |
|
Dip |
|
True
North Azimuth |
|
Hole
Length
(m) |
|
Comment |
| SMD-26-219 |
|
582,670.0 |
|
7,564,013.4 |
|
916.2 |
|
-75.1 |
|
111.0 |
|
1956.8 |
|
Approximate
collar position |
| SMD-26-217 |
|
582,547.6 |
|
7,564,008.4 |
|
919.3 |
|
-74 |
|
93 |
|
2050.9 |
|
Surveyed
collar |
Qualified
Person
All
scientific and technical information in this news release has been reviewed and approved by Sharon Taylor, V.P. Exploration of the Company,
MSc, P.Geo, and a “qualified person” for the purposes of National Instrument 43-101 and Subpart 1300 of Regulation S-K.
Quality
Control and Data Verification
The
program is being executed using three company-owned underground Zinex U5 drills which were converted into surface A5 drills, and two
Marcotte HTM2500 drills purchased by the Company capable of drilling to depths of 2,550 metres (NQ core).
Drill
core samples are either NQ (47.75 mm diameter) or BQ (36.40 mm diameter). All samples are ½ core samples cut by a diamond saw
on site and the remaining half of the core is retained for reference purposes. Samples are generally 1.0 to 1.5 metre intervals or less
at the discretion of the site geologists. Sample preparation and lab analysis was completed at ALS Geochemistry in Johannesburg, South
Africa. Commercially prepared Blank samples and certified Cu/Ni sulphide analytical control standards with a range of grades are inserted
in every batch of 20 samples or a minimum of one set per sample batch. Analyses for Ni, Cu and Co are completed using a peroxide fusion
preparation and ICP-AES finish (ME-ICP81). Analyses for Pt, Pd, and Au are by fire assay (30 grams nominal sample weight) with an ICP-AES
finish (PGM-ICP23).
Holes
are numbered as follows: SMD (Selebi Main Deposit) + year + hole number starting at 201.
The
Qualified Person has verified the data through contribution to the core handling and sampling procedures, visits to the drill and core
processing facilities, monitoring of core logging results and sample selection, review of core assay and QAQC results.
BHEM
Surveys
The
BHEM surveys at Selebi utilize the Crone PEM system operated by local Botswana staff. Survey data is collected using a 3-component fluxgate
probe collecting full waveform data. Surveys have been collected using timebases between 50 and 1000ms (0.25 Hz to 5 Hz). The data has
been processed to a calculated residual step response to better quantify the conductive sources. This added processing has proven to
be highly valuable because of the size of the highly conductive mineralized system.
Technical
Report
The
2024 MRE on the Selebi Mines is supported by the technical report entitled “Technical Report, Selebi Mines, Central District, Republic
of Botswana” dated September 20, 2024 (with an effective date of June 30, 2024) (the “Selebi Technical Report”),
and the technical report summary entitled “S-K 1300 Technical Report Summary Selebi Mines, Central District, Republic of Botswana,
Premium Resources Ltd.” dated December 17, 2024 (with an effective date of June 30, 2024) (the “Selebi Technical Report
Summary”), each prepared by SLR Consulting (Canada) Ltd. for NEXM. Reference should be made to the full text of the Selebi
Technical Report, which was prepared in accordance with NI 43-101 and is available on SEDAR+ (www.sedarplus.ca) and the Selebi
Technical Report Summary, which was prepared in accordance with Subpart 1300 of Regulation S-K and is available in the Company’s
Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the U.S. Securities and Exchange Commission on EDGAR
(www.sec.gov), in each case, under NEXM’s issuer profile.
About
NexMetals Mining Corp.
NexMetals
Mining Corp. is a TSX.V and NASDAQ listed mineral exploration and development company focused on redeveloping the past-producing Selebi
and Selkirk copper-nickel-cobalt-platinum group element mines in Botswana. NexMetals has confirmed the scale of mineralization is larger
than historical estimates, supported by NI 43-101- and Regulation S-K 1300-compliant resource estimates, with ongoing down-hole geophysics,
drilling, and metallurgical programs aimed at expanding resources and supporting future economic studies. The Company is led by an experienced
management and technical team with a proven track record in global mineral projects, emphasizing disciplined execution, transparent governance,
and long-term stakeholder value creation.
For
further information about NexMetals Mining Corp., please contact:
Sean
Whiteford
CEO
info@nexmetalsmining.com
1-866-794-NEXM
(6396)
Neither
the TSX Venture Exchange and its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) nor
the Nasdaq Stock Market LLC accepts responsibility for the adequacy or accuracy of this news release. No stock exchange, securities commission
or other regulatory authority has approved or disapproved the information contained herein.
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Cautionary
Note Regarding Forward-Looking Statements
This
news release contains “forward-looking statements” within the meaning of the United States federal securities laws and “forward-looking
information” within the meaning of applicable Canadian securities legislation (collectively, “forward-looking information”)
based on expectations, estimates and projections as at the date of this news release. Forward-looking information involves risks, uncertainties
and other factors that could cause actual events, results, performance, prospects and opportunities to differ materially from those expressed
or implied by such forward-looking information. For the purposes of this release, forward looking information includes, but is not limited
to, the implementation of the objectives, goals and future plans of the Company, including the expansion potential of the Selebi Main
system and the scale and continuity thereof; the expansion potential within the Flexure Zone and the Company’s interpretation that
the Flexure Zone has significant potential for resource growth beyond the 2024 MRE; the receipt of pending assay results and the timing
and results thereof; the Company’s belief that the combination of massive, semi-massive and disseminated sulphides indicates a
strong sulphide system with potential for scale, particularly when integrated with ongoing BHEM targeting; the expected timing of completion
of the 2026 MRE; the Company’s belief in the benefits of its data-driven exploration approach; the anticipated benefits of TECT
Geological Consulting’s model, including enhancement of the Company’s understanding of the geological controls of mineralization
across the mining license, support for future resource growth and improvement of drill targeting of thicker, higher-grade zones, and
the identification of potential regional exploration targets; the Company’s belief that recent step-out drilling will add meaningful
tonnage to the 2026 MRE and provide a more complete picture of the growth achieved at Selebi Main; the planned completion and use of
BHEM surveying around SMD-26-217 to further test the lateral and down-plunge extent of Selebi Main; the identification of the Third Zone
as an additional target for follow-up drilling and the potential for its lateral and down-plunge expansion; the Company’s plans
for ongoing drilling, geological modelling and BHEM to evaluate the extent of all three mineralized zones and identify further areas
of thick massive sulphide mineralization; the High-Grade Trend extending to approximately 1.5 kilometres and the Company’s plans
to test its continued extent through ongoing drilling and BHEM targeting; the expectation that the Selebi Main system has continued to
grow beyond the resource currently being modelled in the 2026 MRE; and future resource modelling and potential mine planning. These forward-looking
statements, by their nature, require the Company to make certain assumptions and necessarily involve known and unknown risks and uncertainties
that could cause actual results to differ materially from those expressed or implied in these forward-looking statements. Factors that
could cause actual results to differ materially from such forward-looking information include, but are not limited to, capital and operating
costs varying significantly from estimates; the preliminary nature of drilling and metallurgical test results; the ability of exploration
results to predict mineralization; the ability of the Company to implement its drilling, geoscience and metallurgical work on its properties
and work plans generally; prefeasibility or the feasibility of mine production; delays in obtaining or failures to obtain required governmental,
environmental or other project approvals; uncertainties relating to the availability and costs of financing needed in the future; changes
in equity markets; inflation; fluctuations in commodity prices; delays in the development of projects; the other risks involved in the
mineral exploration and development industry; and those risks set out in the Company’s filings with the SEC on EDGAR (www.sec.gov)
and public disclosure record on SEDAR+ (www.sedarplus.ca), in each case, under NEXM’s issuer profile. Although the Company
believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue
reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given
that such events will occur in the disclosed time frames or at all. The Company disclaims any intention or obligation to update or revise
any forward-looking information, whether as a result of new information, future events or otherwise, other than as required by law.