Koryx Copper Drills Widest Historic Continuous High-Grade Zone

110M @ 0.70% CU (TRUE WIDTHS UNKNOWN)

EPL 3140 LICENSE RENEWAL

SUBMISSION OF MINING LICENSE APPLICATION

AT THE HAIB COPPER PROJECT, SOUTHERN NAMIBIA

Highlights

• Drillhole HM90 intersects 110m @ 0.70% Cu (0 to 110m), incl. 36m @ 1.42% Cu (28 to 64m) within a wider envelope of 417m @ 0.33% Cu.

• This represents the widest continuous high-grade zone (>1% Cu) encountered at Haib to date.
• HM90 results are located 60m from previously reported HM06 (90m at 0.60% Cu, including 36m at 0.88% Cu – open at depth) indicating a robust area of high-grade mineralisation at surface in the Target 2 area.
• Namibia’s Ministry of Mines approves the renewal application for Exclusive Prospecting License 3140 (EPL 3140). This EPL underlies the Haib project and renewal of this license is testament to the Koryx team’s execution track record in Namibia.  
• Mining Licence (“ML”) application for the Haib project submitted to Namibia’s Ministry of Mines, thereby further securing the mineral rights tenure of the Haib project.
  
  

VANCOUVER, British Columbia, Sept. 03, 2025 (GLOBE NEWSWIRE) -- Koryx Copper Inc. (“Koryx” or the “Company”) (TSX-V: KRY) is pleased to announce assay results from drill hole HM90 received as part of the Phase 3 drill program for its 2025 exploration and an update on the status of its mineral right tenure on the wholly-owned Haib Copper Project (“Haib” or the “Project”) in southern Namibia.

Haib is an advanced-stage copper/molybdenum/gold project that is envisaged to produce a copper concentrate via a conventional crushing/milling/flotation metallurgical process, with the potential for additional copper production via heap leaching.

Heye Daun, Koryx Copper’s President and CEO, commented: "I am very pleased by two unrelated but equally significant developments at the Haib project. The first one is a very significant, high-grade drill result in drill hole HM90, and the second one is the approval of our EPL renewal application for another 2 years, in conjunction with the submission of our mining license application.

On the first one: Drill hole HM90 was drilled to target the east-west structures related to breccias and shear zones in the Volstruis river area of Target 2 and intersected 0.70% Cu from surface to a depth of over 110m including 36m at 1.42% Cu. This is very significant in proving the ability of the Haib deposit to produce such high grades, but also to demonstrate the continuity of these structures along strike and their much higher grade. Given the support provided by some neighboring high-grade holes (and still open at depth), this area is opening up as a compellingly prospective target with the potential for near surface, high grade and low-strip starter pit development along these east-west trending structures.

On the second one: We are very pleased with the approval of our renewal application for Exclusive Prospecting License (EPL) 3140. As a management team with a proud track record in Namibia, we go to great lengths to deliver on our promises, and the renewal of EPL3140 provides us with an opportunity to further de-risk the project as we advance the project towards the next critical permitting steps, namely obtaining the environmental and mining permits over the next year.”

Figure 1: Plan view indicating the location of HM90 relative to HM06 (previously reported) in the Target 2 area

Figure 2. Long section looking northeast showing the position of HM90 intersection depths relative to the model for Cu mineralization. True widths are unknown.

Discussion of Drill Results

Target 2 Results

HM90 was drilled on the eastern margin of Target 2, just north of the Volstruis River, to reduce the sample spacing and better define the eastern extent of mineralisation. The 419m hole returned an average grade of 0.33% Cu, including a high-grade 110m zone from surface grading 0.70% Cu. Below this, the remainder of the hole averaged 0.20% Cu. Within the upper high-grade interval, a contiguous 36m section of breccias averaged 1.42% Cu, with a peak grade of 3% Cu. Mineralisation is almost entirely chalcopyrite, and this intercept represents the widest continuous high-grade zone (>1% Cu) encountered to date at Haib. 

Table of Significant Intersections

Hole#	Zone	From (m)	To (m)	Width (m)1	Cu (%)	Mo (%)	Au (g/t)
HM90	Entire Hole	0	417	417	0.33	0.007	0.009
	Main	0	110	110	0.70	0.004	0.014
	Including	28	64	36	1.42	0.006	0.023
	Main	236	262	26	0.30	0.018	0.008

1. Widths are interval widths and not true widths. The reported intervals are calculated using the following parameters:
   1. Only Cu (%) was used to determine the intervals
   2. The target composite grade is ≥0.30% Cu.
   3. Composites start and end with samples ≥0.30% Cu.
   4. Grades between 0.20% and 0.30% are included in interval but generally constitute <40% of the interval.
   5. Consecutive samples between 0.20% and 0.30% should be fewer than 5 samples (10m).
   6. Grades below 0.20% are included but generally constitute <20% of the interval.
   7. Consecutive grades <0.2% should be fewer than 2 samples (4m).

The 2021 Koryx drill hole HM06, located approximately 60m south of HM90, also intersected a high-grade zone from surface, returning 90m at 0.60% Cu, including 36m at 0.88% Cu. HM06 was drilled by historical exploration operators to a depth of 152m, stopping in mineralization, with the entire hole having a grade of 0.45% Cu. Other historical drillholes situated approximately 75 m east and west of HM90 similarly report near-surface mineralisation at above the average MRE grades of 0.40% Cu. As such, the significantly higher-grade results from HM90 and HM06 define a highly prospective target, the lateral continuity of which is not yet been tested.

Permitting Update

Ministry Approves Renewal of EPL 3140 Application

The Koryx team submitted the application for the renewal of EPL 3140 to the Ministry of Industry, Mines and Energy (“MIME”) on the 31^st March 2025. The application included a review of the fieldwork and technical update from the previous two years of work on the Haib Project including significant resource drilling and metallurgical testwork programs. The application also confirmed that Koryx had satisfied the expenditure commitments made for the previous EPL license period required for the renewal.

The MIME completed the review of the application and have subsequently granted the renewal of EPL 3140 for a further two years from the expiration of the previous permit. This validates the EPL until 6^th July 2027 with standard requirements relating to the proposed work program and budget. Koryx also commits to make a presentation to the ministry after the first year of the permit validity and obtain annual Environmental Clearance Certificates (“ECC”) from the Ministry of Environment, Forestry and Tourism (“MEFT”).

Mining License Application Submitted to MIME

Haib Project technical studies show the Haib Project is feasible for development and, based on this, a Mining License (“ML”) application has been submitted to convert the EPL to a ML. The application was submitted to the ministry with a technical study update, guidance on the project development timeframe and Koryx’s strategy of financing the mine development.

One of the conditions for granting of the Mining License will be an ECC for the mine development. The Koryx team and specialist consultants are in the process of completing the required Environmental and Social Impact Assessment (“ESIA”) for submission to MEFT in Q2 2026. This is one of the conditions to the granting of a Mining License ECC. In parallel, the MIME is expected to take at least six months to evaluate the application, and during the current prefeasibility study the Koryx team will continue to engage the ministry on technical updates and key project milestones.

Having initiated the ML application, Koryx has strengthened its legal tenure to the mineral rights of the Haib project. This transition is a necessary step to establish the legal basis for mining operations and demonstrates the ability and intent of the Company to progress the Haib project to the next level of development.

Quality Control

All drill core was logged, photographed, and cut in half with a diamond saw. Half of the core was bagged and sent to ALS Laboratories Ltd. in Johannesburg, South Africa for analysis (SANAS Accredited Testing Laboratory, No. T0387) and ActLabs in Canada, while the other half was quartered with one quarter archived and stored on site for verification and reference purposes while the other quarter will be used for metallurgical test work. 33 elements are analyzed by Induced Coupled Plasma (ICP) utilizing a 4-acid digestion and gold is assayed for using a 30g fire assay method. Duplicate samples, blanks, and certified standards are included with every batch and are actively used to ensure proper quality assurance and quality control (“QA/QC”) The QA/QC frequency is 1 in 20 for each of blanks, duplicates and standards. 

Qualified Person

Mr. Dean Richards Pr.Sci.Nat., MGSSA – BSc. (Hons) Geology is the Qualified Person for the Haib Copper Project and has reviewed and approved the scientific and technical information in this news release and is a registered Professional Natural Scientist with the South African Council for Natural Scientific Professions (Pr. Sci. Nat. No. 400190/08). Mr. Richards is independent of the Company and its mineral properties and is a Qualified Person for the purposes of National Instrument 43-101.

About Koryx Copper Inc.

Koryx Copper Inc. is a Canadian copper development Company focused on advancing the 100% owned Haib Copper Project in Namibia whilst also building a portfolio of copper exploration licenses in Zambia. Haib is a large, advanced (PEA-stage) copper/molybdenum porphyry deposit in southern Namibia with a long history of exploration and project development by multiple operators. More than 80,000m of drilling has been conducted at Haib since the 1970’s with significant exploration programs led by companies including Falconbridge (1964), Rio Tinto (1975) and Teck (2014). Extensive metallurgical testing and various technical studies have also been completed at Haib to date.

Additional studies are underway aiming to demonstrate Haib as a future long-life, low-cost, low-risk open pit, sulphide flotation copper project with the potential for additional copper production from heap leaching. Haib has a current mineral resource of 414Mt @ 0.35% Cu for 1,459Mt of contained copper in the Indicated category and 345Mt @ 0.33% Cu for 1136Mt of contained copper in the Inferred category (0.25% Cu cut-off).

Mineralization at Haib is typical of a porphyry copper deposit and it is one of only a few examples of a Paleoproterozoic porphyry copper deposit in the world and one of only two in southern Africa (both in Namibia). Due to its age, the deposit has been subjected to multiple metamorphic and deformation events but still retains many of the classic mineralization and alteration features typical of these deposits. The mineralization is dominantly chalcopyrite with minor bornite and chalcocite present and only minor secondary copper minerals at surface due to the arid environment.

Further details of the Haib Copper Project are available in the corresponding technical report titled, “NI 43-101 Technical Report – August 2024 Mineral Resource Estimate for the Haib Copper Project, Namibia” dated effective August 31, 2024 (the “Technical Report”). The Technical Report and other information is available on the Company's website at https://koryxcopper.com and under the Company's profile on SEDAR+ at www.sedarplus.ca.

ON BEHALF OF THE BOARD OF DIRECTORS
“Heye Daun”
President, CEO and Director

Additional information is also available by contacting the Company:

Julia Becker
Corporate Communications
jbecker@koryxcopper.com
+1-604-785-0850

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Cautionary Statement Regarding Forward-Looking Information

This press release contains “forward-looking information” within the meaning of applicable Canadian securities legislation. Forward-looking information includes, without limitation, statements regarding the use of proceeds from the Company's recently completed financings and the future or prospects of the Company. Generally, forward-looking information can be identified by the use of forward-looking terminology such as “plans”, “expects” or “does not expect”, “is expected”, “budget”, “scheduled”, “estimates”, “forecasts”, “intends”, “anticipates” or “does not anticipate”, or “believes”, or variations of such words and phrases or state that certain actions, events or results “may”, “could”, “would”, “might” or “will be taken”, “occur” or “be achieved”. Forward-looking statements are necessarily based upon a number of assumptions that, while considered reasonable by management, are inherently subject to business, market, and economic risks, uncertainties, and contingencies that may cause actual results, performance, or achievements to be materially different from those expressed or implied by forward-looking statements. Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking information, other factors may cause results not to be as anticipated, estimated, or intended. There can be no assurance that such information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking information. Other factors which could materially affect such forward-looking information are described in the risk factors in the Company's most recent annual management discussion and analysis. The Company does not undertake to update any forward-looking information, except in accordance with applicable securities laws.

Photos accompanying this announcement are available at

https://www.globenewswire.com/NewsRoom/AttachmentNg/972e53f1-1909-40f8-9398-bab01449c128

https://www.globenewswire.com/NewsRoom/AttachmentNg/7453f268-2d69-4a43-a9c7-61efac2cc905

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