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NexMetals Re-Assays Return 107 Metres of 0.94% CuEq Including 0.99% CuEq over 91 Metres Showing Sizeable Continuity of Mineralization at Selkirk

Drill Results

NexMetals Re-Assays Return 107 Metres of

0.94% CuEq Including 0.99% CuEq over 91

Metres Showing Sizeable Continuity of

Mineralization at Selkirk

Vancouver, British Columbia--(Newsfile Corp. - August 28, 2025) -

NexMetals Mining Corp. (TSXV:

NEXM) (NASDAQ: NEXM)

(the "

Company

") announces re-assay results from an initial 6 holes of its

ongoing 34 hole resampling program at the past-producing Copper, Nickel, Cobalt and Platinum Group

Elements ("

Cu-Ni-Co-PGE

") Selkirk Mine in Botswana.

Highlights: Adding Value and Expansion Potential

The initial re-assay results confirm large intercepts of mineralization within the current

mineral resource estimate ("MRE") as well as outside of the MRE and within the

conceptualized pit shell demonstrating potential for expansion of the deposit.

DSLK129 - within the MRE

107.0 metres of 0.94% CuEq (0.35% Cu, 0.31% Ni, 0.56 ppm Pd, 0.13ppm Pt)

Incl. 91.00 metres of 0.99% CuEq (0.36% Cu,0.33% Ni, 0.58 ppm Pd, 0.13ppm Pt)

DSLK130 - outside of the MRE but within the conceptualized pit shell

123.1 metres of 0.47% CuEq (0.13% Cu, 0.16% Ni, 0.34 ppm Pd, 0.09 ppm Pt)

In the past, historical drill holes were inconsistently analyzed for PGEs.

The additional value of

the PGEs has the potential to expand the MRE.

Current cut-off of US $25.00 per tonne net smelter return defined in the MRE

translates to 0.46%

CuEq. Any material above this cut-off grade could be potentially mined.

Figure 1:

Location 2025 Resampled drill holes and MRE

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/7759/264220_87dfce9ba4447bc0_002full.jpg

Morgan Lekstrom, CEO of the Company, commented:

"These early results from Selkirk confirm

what we have believed from the beginning, that the deposit is far from being fully defined. The fact that

mineralization starts near surface provides even more confidence in Selkirk's potential for open-pit

development. Importantly, the re-assay program also includes the PGEs that were incompletely tested,

and those results are already highlighting the potential to expand the MRE. With ongoing assay results,

we are only beginning to see the scale of what Selkirk can become."

Assay results are reported below in Table 1 and drill hole collar details are provided in Table 2.

Table 1: Assay Results Selkirk Deposit

HOLE ID

FROM

(m)

TO

(m)

1

LENGTH

(m)

Cu

(%)

Ni

(%)

Co

(%)

Pd

(ppm)

Pt

(ppm)

Au

(ppm)

2

CuEq

(%)

DSLK018

18.00

30.60

12.60

0.24

0.19

0.01

0.36

0.07

0.03

0.61

DSLK018

74.00

132.60

58.60

0.27

0.26

0.01

0.50

0.12

0.05

0.78

incl.

74.00

110.70

36.70

0.27

0.28

0.01

0.56

0.13

0.05

0.83

DSLK018

162.00

207.00

45.00

0.28

0.26

0.01

0.67

0.14

0.07

0.87

DSLK018

213.90

220.00

6.10

0.36

0.38

0.02

0.69

0.15

0.05

1.09

DSLK018

239.00

244.00

5.00

0.41

0.27

0.01

0.55

0.12

0.06

0.96

DSLK018

269.50

277.15

7.65

0.39

0.33

0.02

0.58

0.13

0.06

1.01

DSLK087

108.00

119.00

11.00

0.13

0.13

0.01

0.23

0.05

0.03

0.37

DSLK089

109.00

147.60

38.60

0.17

0.18

0.01

0.39

0.09

0.06

0.54

incl.

109.00

123.00

14.00

0.19

0.21

0.01

0.45

0.11

0.08

0.62

and

141.50

147.60

6.10

0.31

0.32

0.01

0.68

0.13

0.05

0.96

DSLK112

26.20

66.00

39.80

0.26

0.25

0.01

0.54

0.12

0.05

0.78

DSLK129

207.00

314.00

107.00

0.35

0.31

0.02

0.56

0.13

0.06

0.94

DSLK129

207.00

298.00

91.00

0.36

0.33

0.02

0.58

0.13

0.06

0.99

DSLK130

27.90

288.00

260.10

0.18

0.19

0.01

0.39

0.09

0.03

0.58

3

incl

27.90

151.00

123.10

0.13

0.16

0.01

0.34

0.09

0.03

0.47

3

incl

80.00

106.00

26.00

0.18

0.19

0.01

0.38

0.10

0.03

0.56

3

incl.

165.00

183.00

18.00

0.24

0.26

0.01

0.53

0.11

0.04

0.76

and

229.00

283.00

54.00

0.29

0.26

0.01

0.55

0.12

0.05

0.83

HOLE ID

FROM

(m)

TO

(m)

1

LENGTH

(m)

Cu

(%)

Ni

(%)

Co

(%)

Pd

(ppm)

Pt

(ppm)

Au

(ppm)

2

CuEq

(%)

1

Length refers to drillhole length and not true width.

2

CuEq% calculated using the formula Cu% + Ni%*(55.605/53.913) + Pd g/t*(22.948/53.913) + Pt g/t*(14.891/53.913) using metal prices and

recoveries listed in the 2025 Technical Report.

3

Interval is outside MRE but inside the conceptualized pit.

Table 2: Drill Collar Information Selkirk Deposit

HOLE ID

1

Easting

1

Northing

1

Elevation

Dip

Azimuth

Hole Length (m)

DSLK018

575402.3

7642550.6

988.1

-70

35

346.97

DSLK087

575540.4

7642983.1

997.8

-70

35

189.23

DSLK089

575433.3

7642362.0

982.0

-70

34

192.20

DSLK112

575666.4

7642840.2

998.0

-55

311

182.45

DSLK129

575221.0

7642370.6

981.9

-70

30

457.55

DSLK130

575266.2

7642332.3

981.0

-86

155

384.48

1

Coordinates are WGS84z35S with geoidal elevations

Technical Report

The MRE on the Selkirk Mine is supported by the Technical Reports entitled "NI 43-101 Technical

Report Selkirk Nickel Project, North East District, Republic of Botswana", dated January 8, 2025 (with

an effective date of November 1, 2024 and "NI 43-101 Technical Report, Selkirk Nickel Project,

Northeast District, Republic of Botswana" dated April 12, 2023 (with an effective date of March 31,

2023). Reference should be made to the full text of the Technical Reports for the assumptions,

qualifications and limitations set forth therein, which was prepared in accordance with NI 43-101 and

Subpart 1300 of Regulation S-K and is available on SEDAR+ (

www.sedarplus.ca

) and EDGAR

(

www.sec.gov

), in each case, under NEXM's issuer profile.

Quality Control

Historic drill core samples are NQ (47.6 mm diameter) that were previously sawn in half. All current

samples are ½ core samples that were previously retained for reference purposes. Samples are

generally 1 metre in length and do not correspond to the historic sample intervals. Sample preparation

and lab analysis was completed at ALS Chemex 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).

Qualified Person

All scientific and technical information in this news release has been reviewed and approved by Sharon

Taylor, VP 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.

About NexMetals Mining Corp.

NexMetals Mining Corp. is a mineral exploration and development company that is focused on the

redevelopment of the previously producing copper, nickel and cobalt resources mines owned by the

Company in the Republic of Botswana.

NexMetals is committed to governance through transparent accountability and open communication

within our team and our stakeholders. NexMetals' team brings extensive experience across the full

spectrum of mine discovery and development. Collectively, the team has contributed to dozens of

projects, including work on the Company's Selebi and Selkirk mines. Senior team members each have

on average, more than 20 years of experience spanning geology, engineering, operations, and project

development.

For further information about NexMetals Mining Corp., please contact:

Morgan Lekstrom

CEO and Director

[email protected]

Jaclyn Ruptash

V.P., Communications and Investor Relations

[email protected]

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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X:

https://x.com/NexMetalsCorp

LinkedIn:

https://www.linkedin.com/company/NexMetalsMiningCorp

Facebook:

https://www.facebook.com/NexMetalsMiningCorp

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 proposed

advancement of the Selkirk Mine as currently contemplated; the Company's goal of validating legacy

data and generating new intercepts to support an updated resource model; the Company's intention of

completing an updated MRE; the release of metallurgical testing results and the expected timing

thereof; anticipated upgrades to existing mineral resource estimates on the Selkirk Mine in

accordance with NI 43-101; management's belief that historical resources could be indicative of the

presence of mineralization on the deposits; and the anticipated benefits of the Company's approach

to its resource development plan. 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 U.S. Securities and

Exchange Commission 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.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/264220