Koryx Copper Provides Further Drill Results for the Haib Copper Project in Southern Namibia

Highlights 

• Assay results reported for 17 drill holes comprising over 6,430m of infill drilling.
• Consistent, wide intercepts up to 831m in width, including a 244m interval @ 0.42% CuEq in HM155.
• Highest Cu (8.01%) and Ag (60.5g/t) grades recorded at Haib to date, intersected from surface in HMRC008 from 4m to 6m.
• Drilling is ongoing with 15 drill rigs, 7 of which are on double shift.
• Technical studies and cost estimation ongoing towards planned PFS publication at the end of 2026.
• Best 7 of 17 drill hole assay intersections as follows:

• HM155:		831m @ 0.27% CuEq (95ppm Mo, 0.018g/t Au) (0 – 831m)
	incl.	244m @ 0.42% CuEq (536 – 780m)
• HM147:		654m @ 0.25% CuEq (33ppm Mo, 0.019g/t Au) (0 – 654m)
	incl.	84m @ 0.47% CuEq (4 – 88m) incl. 12m @ 0.79% CuEq
	and	46m @ 0.47% CuEq (234 – 280m)
• HMRC008:		231m @ 0.44% CuEq (24ppm Mo, 0.037g/t Au) (0 – 231m)
	incl.	12m @ 2.55% CuEq (0 – 12m)
	and	10m @ 0.61% CuEq (190 – 200m)
	and	14m @ 0.47% CuEq (216 – 230m)
• HM152:		578m @ 0.25% CuEq (51ppm Mo, 0.013g/t Au) (0 – 578m)
	incl.	14m @ 0.59% CuEq (84 – 98m)
	and	16m @ 0.36% CuEq (282 – 298m)
	and	42m @ 0.33% CuEq (412 – 454m)
• HM139:		466m @ 0.26% CuEq (38ppm Mo, 0.025g/t Au) (0 – 466m)
	incl.	76m @ 0.52% CuEq (140 – 216m) incl. 14m @ 0.70% CuEq
	and	14m @ 0.37% CuEq (318 – 332m)
• HM146:		497m @ 0.22% CuEq (43ppm Mo, 0.023g/t Au) (0 – 497m)
	incl.	20m @ 0.44% CuEq (234 – 254m)
	and	62m @ 0.37% CuEq (354 – 416m) incl. 10m @ 0.47% CuEq
• HM134:		605m @ 0.21% CuEq (47ppm Mo, 0.021g/t Au) (0 – 605m)
	incl.	20m @ 0.54% CuEq (248 – 268m)
	and	10m @ 0.42% CuEq (362 – 372m)
	and	10m @ 0.55% CuEq (444 – 454m)

LUXEMBOURG, Aug. 14, 2026 (GLOBE NEWSWIRE) -- Koryx Copper S.A. (TSX:KRY.V) (NSX:KYX) (OTCQB:KRYXF) (“Koryx” or the "Company") is pleased to announce assay results from 17 drill holes (6,430m) received as part of the ongoing infill and expansion drill program on the wholly-owned Haib Copper Project (“Haib” or the “Project”) in southern Namibia.

The Haib deposit is a massive, disseminated porphyry Cu deposit with associated Mo and Au. Haib is envisaged to produce a Cu and Mo concentrate via large-scale open pit mining and conventional sulphide milling and flotation with the potential for additional copper cathode production via oxide heap leaching. Ongoing process flow sheet optimization is aimed at improving project economics whilst reducing technical risk.

Heye Daun, Koryx Copper’s President and CEO commented: “These results stand out for their length as much as their grade. HM155 intersected 0.27% CuEq from surface to 831m including 244m at 0.42% CuEq, while HM139 and HM147 returned continuous zones of 76m at 0.52% CuEq and 84m at 0.47% CuEq, respectively, underscoring the scale and continuity of mineralization at Haib at good grades. By-product credits continue to strengthen the resource as well, with molybdenum and gold now joined by encouraging silver values, including our highest Ag grade at Haib to date. As we approach the end of our infill drilling ahead of an updated resource estimate, the balance of holes serve to confirm the existing model, with results trending consistently to the upside across all of the Haib system, reinforcing our confidence in the deposit as we advance towards the PFS publication expected at the end of 2026.”

Figure 1: Plan view indicating recent drill hole locations. Results indicated in black are shown on the long section below

Discussion of Results

Target Area 1:

HM134 was drilled on the eastern edge of the high-grade Target1 mineralization. Results from the upper section of the hole correlate well with the existing model, while the lower section demonstrates that the >0.2% Cu grade extends potentially some 100m below the current grade shell. Mo grades are initially low but increase from 248 m downhole, averaging between 100ppm and 200ppm to a depth of 518m.

HM139 lies in the southern part of Target 1 and was drilled to better define the southern limit of mineralization. The upper 205m of the hole was reported previously; however, as drilling terminated in strong mineralization, the hole was subsequently extended. The drill trace lies almost entirely outside the current Cu grade shell model, and the excellent results are expected to shift the 0.25% Cu grade shell southwards between approximately 50m and 140m depending on depth. Au mineralization is also present, including an 8.77m interval averaging 0.14g/t from 196m downhole.

Figure 2. Long section showing seventeen drillhole intersections relative to the model for CuEq% Intercepts

HM147 starts within the high-grade Target1 mineralization before intersecting the Quartz Vein, which separates the Target1 and Target2 mineralized zones, at a depth of 408m where it enters Target2 mineralization. As an infill hole, the excellent results over the upper 408m correlate well with the current grade shell model. Below the Quartz Vein, the hole intersects an 88m-wide barren Cu zone before returning to grades typical of Target2 mineralization. Mo is well developed within the upper 100 m of the hole but decreases to background levels below this interval.

HM154 is located on the southeastern edge of Target1. Cu results are consistent with expectations, although grades are slightly higher than forecast. Au is present at relatively high grades for Haib, returning 0.103g/t over 8m from 20m downhole. Mo grades remain low throughout the hole.

HM157 is an infill hole drilled towards the centre of Target1 mineralization. Results correlate well with the current grade shell model. Mo is generally poorly developed, with the only significant intersection returning 361ppm over 4m from 366m. Au occurs sporadically at relatively high grades for Haib, including 0.25g/t from 248m and 0.20 g/t from 268m over 2m.

HM161 was drilled on the eastern limit of Target1 mineralization, where Cu grades are generally below 0.2%. Consequently, the intersection of 16m at 0.31% Cu from 80m was unexpected. Mo is essentially absent throughout the hole.

HM163 is an infill hole drilled in the northwestern part of Target1. The hole was expected to intersect the Quartz Vein before entering Target2, which it has done, although approximately 30m shallower than anticipated. The lower half of the hole returned Cu grades lower than those predicted by the surrounding boreholes and is therefore expected to reduce the extent of the 0.25% Cu grade shell in this vicinity. Mo is essentially absent throughout the hole.

HMRC004 – is an infill reverse circulation hole located in the bed of the Volstruis River and drilled into Target1. Cu results correlate very well with the existing grade shell model. Mo is generally absent. Au is present, with one sample returning 0.22g/t and another 0.16g/t over separate 2m intervals between 56m and 76m downhole.

HMRC005 was drilled from within the Volstruis River on the northeastern limit of Target1 mineralization. The intersection of 12m at 0.51% Cu, commencing close to surface, has the potential to extend the 0.25% Cu grade shell laterally by approximately 30–40 m, although grades are generally slightly lower than anticipated. Mo is present but at low grades.

HMRC006 is located on the northeastern periphery of Target1 and was drilled to test the down-dip projection of the higher-grade intersections encountered in HM017, located 55 m to the south. Results show that these higher-grade intersections do not extend to the position of HMRC006. Consequently, the results are expected to reduce the extent of the Cu grade shells in the immediate vicinity of the hole. W mineralization is present, returning 295ppm over 4m from 38m downhole.

HMRC007 is an infill reverse circulation hole located in the northwestern part of Target1. Cu results are broadly consistent with expectations; however, drilling was terminated at 231m due to machine limitations. With the final 17 m averaging 0.39% Cu, it is clear mineralization remains open at the end of the hole and drilling will continue with a diamond tail. Mo is poorly developed throughout the drilled interval.

HMRC008 is an infill hole located in the northwestern part of Target1. Although the model predicted high-grade Cu mineralization from surface, the intersection of 12m at 2.39% Cu exceeded expectations. One sample within this interval returned the highest Cu (8.01%) and Ag (60.5g/t) grades recorded at Haib to date. This is encouraging, and the team are modelling the Ag resource as an additional potential by product. Au is also elevated, with a peak grade of 0.34g/t. W mineralization is well developed, returning 640ppm over 6m from 14m downhole and 238ppm over 8m from 42m. Despite these locally exceptional grades, the overall results correlate well with the existing grade shell model. As the hole was terminated in mineralization due to drilling limitations, it will also be extended with a diamond tail.

Target Area 2:

HM146 and HM155 are infill holes drilled 31 m apart on the same section line to depths of 479m and 831m, respectively. Over the interval common to both holes, the results are virtually identical, with the consistently high Cu grades expected to produce a positive expansion of the 0.25% Cu grade shell. Below approximately 500m, the results from HM155 continue to correlate well with the current geological model. Mo grades become more variable below 200m, with elevated values occurring within discrete sub-zones ranging from 2m to 20m in width. W mineralization is also present, with HM146 returning 109ppm over 8m from 236m, while HM155 intersected 1,500ppm over 2m at 798m.

HM156 is located in the northern part of Target2 and was drilled to provide improved definition of the northern limit of Cu mineralization. Results indicate that the grade shell boundary is likely to shift southwards, resulting in a localized reduction in mineralized volume. However, the two intervals exceeding 0.46% Cu occur outside the existing model and are expected to partially offset this reduction.

HMRC009 lies in the centre of Target2 and was drilled as an infill hole. Cu results are generally consistent with expectations; however, lower grades encountered between 100m and 170m are expected to reduce the extent of the 0.25% Cu grade shell in the immediate vicinity of the hole. Mo is well developed throughout much of the hole, with grades commonly exceeding 150ppm.

Target Area 3:

HM152 is an infill hole with Cu results that correlate well with the current grade shell model. Mo is moderately developed, with grades ranging from 84ppm to 202ppm. Au is present as a single 2m interval at 530m, returning a grade of 0.46g/t. Overall, the results support the existing interpretation of mineralization within this part of Target3.

Table of Significant Intersections

Hole#	Zone	From (m)	To (m)	Width (m)1	Cu (%)	Mo (ppm)	Au (g/t)	CuEq (%)2
HM134 (previously partially reported)	Entire Hole	0	605	605	0.18	47	0.021	0.21
	Main	4	36	32	0.31	26	0.027	0.34
	Main	248	268	20	0.45	183	0.028	0.54
	Including	248	254	6	0.84	72	0.030	0.89
	Main	362	372	10	0.36	108	0.028	0.42
	Main	390	394	4	0.70	141	0.037	0.78
	Main	428	518	90	0.25	85	0.028	0.30
	Including	444	454	10	0.44	201	0.052	0.55
	Main	502	518	16	0.26	51	0.037	0.31
HM139 (previously partially reported)	Entire Hole	0	466	466	0.23	38	0.025	0.26
	Main	140	216	76	0.47	30	0.057	0.52
	Including	150	164	14	0.64	37	0.063	0.70
	Including	196	205	9	1.02	18	0.139	1.13
	Main	318	332	14	0.34	53	0.016	0.37
	Main	366	420	54	0.32	107	0.018	0.37
	Including	384	388	4	0.80	122	0.042	0.87
HM146	Entire Hole	0	497	497	0.18	43	0.023	0.22
	Main	234	254	20	0.38	100	0.029	0.44
	Main	266	270	4	0.43	111	0.040	0.50
	Main	354	416	62	0.31	105	0.017	0.37
	Including	380	386	6	0.42	320	0.021	0.55
	Including	402	412	10	0.43	38	0.025	0.47
	Main	466	474	8	0.28	28	0.016	0.30
HM147	Entire Hole	0	654	654	0.22	33	0.019	0.25
	Main	4	88	84	0.41	100	0.032	0.47
	Including	6	10	4	1.13	132	0.055	1.22
	Including	22	34	12	0.73	84	0.048	0.79
	Including	48	52	4	0.56	230	0.043	0.67
	Including	64	70	6	0.34	432	0.028	0.52
	Main	234	280	46	0.44	21	0.039	0.47
	Including	236	242	6	1.02	41	0.072	1.09
	Including	252	258	6	0.55	34	0.056	0.60
	Main	316	356	40	0.29	19	0.008	0.30
	Including	316	322	6	0.56	7	0.035	0.59
	Main	374	406	32	0.34	9	0.010	0.35
	Including	386	390	4	0.51	9	0.022	0.53
	Including	396	398	2	0.75	8	0.009	0.75
	Main	592	614	22	0.26	88	0.027	0.31
HM152	Entire Hole	0	578	578	0.22	51	0.013	0.25
	Main	50	56	6	0.39	66	0.015	0.43
	Main	84	98	14	0.54	103	0.019	0.59
	Including	86	90	4	0.95	176	0.025	1.04
	Main	134	202	68	0.26	100	0.014	0.31
	Main	214	274	60	0.27	54	0.016	0.30
	Main	282	298	16	0.33	47	0.016	0.36
	Main	338	400	62	0.29	59	0.012	0.32
	Including	342	346	4	0.58	66	0.021	0.62
	Main	412	454	42	0.29	90	0.013	0.33
HM154	Entire Hole	0	165	165	0.12	7	0.020	0.14
	Main	16	34	18	0.28	33	0.065	0.34
HM155	Entire Hole	0	831	831	0.23	95	0.018	0.27
	Main	204	244	40	0.29	42	0.027	0.33
	Including	228	234	6	0.57	66	0.045	0.63
	Main	330	358	28	0.35	61	0.028	0.39
	Including	338	350	12	0.45	63	0.028	0.49
	Main	494	514	20	0.27	52	0.017	0.30
	Main	536	780	244	0.33	198	0.023	0.42
	Including	580	586	6	0.57	89	0.033	0.63
	Including	630	644	14	0.46	286	0.033	0.59
	Including	656	670	14	0.43	297	0.022	0.56
	Including	680	702	22	0.43	311	0.032	0.57
	Including	712	726	14	0.56	377	0.027	0.72
HM156	Entire Hole	0	356	356	0.17	13	0.017	0.18
	Main	212	232	20	0.46	20	0.043	0.50
	Including	222	226	4	0.77	50	0.083	0.85
	Main	308	314	6	0.51	6	0.036	0.54
HM157	Entire Hole	0	450	450	0.19	49	0.020	0.22
	Main	48	56	8	0.29	81	0.046	0.35
	Main	88	100	12	0.33	63	0.023	0.37
	Main	224	234	10	0.27	100	0.030	0.33
	Main	246	256	10	0.95	33	0.043	0.99
	Including	248	250	2	3.77	72	0.113	3.88
	Main	268	280	12	0.31	43	0.051	0.37
	Main	366	370	4	0.82	361	0.143	1.05
HM161	Entire Hole	0	188	188	0.12	9	0.015	0.13
	Main	80	96	16	0.31	9	0.020	0.33
HM163	Entire Hole	0	269	269	0.19	10	0.018	0.21
	Main	8	18	10	0.27	4	0.028	0.30
	Main	32	42	10	0.28	10	0.029	0.30
	Main	68	74	6	0.36	14	0.032	0.39
	Main	86	122	36	0.30	19	0.031	0.33
	Including	88	96	8	0.41	65	0.035	0.45
	Including	106	110	4	0.45	2	0.049	0.49
	Main	260	264	4	0.64	2	0.037	0.67
HMRC004	Entire Hole	0	243	243	0.22	9	0.038	0.25
	Main	0	6	6	1.27	16	0.013	1.29
	Main	62	128	66	0.31	12	0.049	0.35
	Including	64	76	12	0.54	46	0.078	0.61
HMRC005	Entire Hole	0	195	195	0.23	30	0.029	0.26
	Main	2	14	12	0.51	57	0.031	0.55
	Main	50	62	12	0.29	22	0.029	0.32
	Main	92	110	18	0.27	24	0.040	0.31
	Main	136	142	6	0.33	27	0.034	0.37
	Main	180	195	15	0.28	64	0.058	0.35
HMRC006	Entire Hole	0	228	228	0.13	19	0.019	0.15
	Main	218	228	10	0.27	13	0.034	0.30
HMRC007	Entire Hole	0	231	231	0.23	12	0.030	0.26
	Main	0	6	6	0.38	9	0.022	0.39
	Main	14	20	6	0.30	64	0.024	0.34
	Main	24	32	8	0.27	51	0.026	0.30
	Main	40	48	8	0.32	19	0.028	0.35
	Main	102	112	10	0.36	9	0.037	0.39
	Main	214	231	17	0.39	9	0.056	0.44
HMRC008	Entire Hole	0	231	231	0.40	24	0.037	0.44
	Main	0	12	12	2.39	135	0.148	2.55
	Including	4	6	2	8.01	330	0.342	8.38
	Main	16	110	94	0.32	29	0.028	0.35
	Including	48	54	6	0.58	25	0.041	0.62
	Including	100	106	6	0.59	79	0.053	0.65
	Main	180	202	22	0.42	11	0.041	0.45
	Including	190	200	10	0.57	14	0.053	0.61
	Main	216	230	14	0.42	6	0.057	0.47
	Including	224	228	4	0.72	9	0.079	0.78
HMRC009	Entire Hole	0	243	243	0.24	120	0.018	0.30
	Main	0	28	28	0.44	77	0.030	0.49
	Including	2	10	8	0.64	110	0.036	0.71
	Main	70	146	76	0.24	161	0.018	0.31
	Including	80	86	6	0.36	142	0.019	0.43
	Main	170	184	14	0.30	239	0.020	0.40
	Including	180	184	4	0.44	460	0.029	0.63
	Main	196	214	18	0.27	164	0.019	0.34

1. True widths are unknown. Widths are interval widths and not true widths. The reported intervals are calculated using the following parameters:
   1. Only CuEq (%) was used to determine the intervals.
   2. The target composite grade is ≥0.30% CuEq.
   3. Composites start and end with samples ≥0.30% CuEq.
   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).
2. Mineral Resource (MRE) copper equivalent (CuEq%) values have been calculated using commodity type and price considering the relevant recovery rate. The following metal prices were used Cu US$4.54/lb; Mo US$22.68/lb; Au US$4,000/oz along with the following recoveries indicated from test work, Cu 89%; Mo 65% and Au 50%. The CuEq was then calculated using CuEq = [(Cu grade/100 * 0.89 Cu recovery * 2204.62 * $4.54 Cu price/lb) + (Mo ppm/1000000 * 0.65 Mo recovery * 2204.62 * $22.68 Mo price/lb) + (Au grade * 0.50 Au recovery * 4000 Au price/oz / 31.1035)] / [0.89 Cu Recovery * 2204.62 * $4.54 Cu price/lb]
3. Partial results previously reported

Quality Assurance / Quality Control

All drill core is HQ sized at collar and reduced to NQ size in fresh rock. The core was all 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 Persons

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 S.A.

Koryx Copper S.A. is a Luxembourg domiciled copper development Company focused on advancing its 100% owned Haib Copper Project in Namibia whilst also building a portfolio of copper exploration licenses in Zambia. Haib is a large copper porphyry deposit in southern Namibia with significant gold and molybdenum credits and a long history of exploration and project development by multiple operators.

More than 145,000m of drilling has been conducted at Haib since the 1970’s with significant exploration programs led by companies including Falconbridge (1964), Rio Tinto (1975), Teck (2014) and Koryx Copper (2021-2026). Extensive further drilling, metallurgical testing and various technical studies have been completed at Haib. Additional studies are underway aiming to demonstrate Haib as a future long-life, low-cost, low-risk open pit, sulphide milling and flotation copper project with additional heap leach potential.

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

Further details of the Haib Copper Project are available in the technical report titled “March 2026 Mineral Resource Estimate Haib Copper Project, Namibia, National Instrument 43-101 Technical Report” dated effective March 16, 2026. The report and other information are available on the Company's website at www.koryxcopper.com and under the Company's profile on SEDAR+ at www.sedarplus.ca.

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 future or prospects of the Haib project or the Company, including prospective production rates and life-of-mine, the timing of publishing a PFS, the commencement of trading of the Shares under the new Company name, and the effective date of the new CUSIP and ISIN assigned to the Shares. 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.

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