Andina Copper intersects 264m at 0.63% Cu within 504m at 0.48% Cu

August 11, 2026 – TheNewswire - Vancouver, British Columbia - Andina Copper Corporation (TSX-V: ANDC | FSE: FIR | OTCQB: PMMCF) is pleased to report additional outstanding drill results from its large-scale Cobrasco Porphyry Copper-Moly Discovery in Chocó, Colombia. Andina Copper is in the early stages of a systematic, wide-spaced scout drilling programme using substantial step-outs to delineate the lateral extent and limits of this exciting new discovery.

Hole CDH010, collared from the same drill pad as CDH006 - CDH009 ( refer 24 June 2026 News Release ) and drilled to the WSW, intersected a strongly mineralized upper interval commencing at 36m and extending to 540m downhole. Moderate to lower grade mineralization continues at depth to approximately 820m downhole. The hole was terminated at a final depth of 844.65m.

Hole CDH010 further extends and confirms the continuity of shallow Cu–Mo mineralization within the central portion of the Cobrasco system.

HIGHLIGHTS:

504m @ 0.48% Cu, 37ppm Mo from 36m

Incl. 264m @ 0.63% Cu, 35ppm Mo from 36m

and 36m @ 0.62% Cu from 486m

84m @ 0.40% Cu, 91ppm Mo from 660m

Incl. 44m @ 0.45% Cu, 120ppm Mo from 700m

An additional drillhole (CDH011) has been completed from the same pad as CDH006-CDH010 (Figure 1, Pad 3), and multiple holes have recently been drilled from a large step-out position located 350m to the NW. Results are pending.

A mineralized footprint of approximately 1,200m by 550-700m has been delineated from the initial 10 diamond drillholes reported to date for approximately 11,000m, and the system remains wide open in multiple directions.

J oseph van den Elsen, Andina Copper President and CEO stated:

“Andina Copper continues to systematically advance its wide spaced scout drilling programme, with hole CDH010 returning another high grade near surface intercept. Every hole completed from this platform has intersected long runs of shallow copper mineralization, underlining the exceptional continuity of the Cobrasco system.

The drill defined footprint of the Cobrasco mineralized porphyry system now measures approximately 1,200m x 550-700m and remains open in all directions. With results from CDH011 imminent, and drilling continuing from a new platform 350m to the NW, we look forward to a continuing steady flow of results and the systematic expansion of the Cobrasco Deposit”.

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Figure 1: Cobrasco Project plan view - copper soil geochemistry and drillhole traces with downhole Cu assays. CDH010 intercepts as labelled; CDH011 results pending; mineralization open in multiple directions.

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Figure 2: Cobrasco cross section (looking East) showing CDH010 downhole Cu assays and adjacent drillholes from Pads 1, 3 and 4. CDH011 completed, results pending.

Geology and Mineralization - Drillhole CDH010

Hole CDH010 was collared from the same drill pad as CDH006 - CDH009 (and subsequent hole CDH011 ) . It was drilled WSW to bisect the wide untested area between CDH006 and CDH009 and to test the continuation of shallow mineralization previously intersected from this collar position. All holes completed thus far from this pad have intersected consistent intervals of shallow, continuous moderate to high grade Cu-Mo mineralization beginning immediately below the base of oxidation.

Hole CDH010 (Az: 260° Dip: -60º Depth: 844.65m) was the fifth hole drilled from this drill pad, designed to test approximately 410m horizontally and 735m vertically.

The hole intersected a supergene-leached zone extending to approximately 36m downhole. From the base of this zone to approximately 54m downhole, moderate supergene chalcocite enrichment occurs as coatings on pyrite and chalcopyrite. Below the supergene-enriched zone, significant hypogene chalcopyrite mineralization continues to approximately 322m downhole as disseminations and veinlets hosted by rhyolite porphyries and subordinate daci-andesitic porphyries, microdiorite, and magmatic-hydrothermal breccias.

Magmatic-hydrothermal breccias and adjacent structurally controlled zones between 186m and 312m downhole host the highest copper grades intersected in the hole, including 60m @ 0.74% Cu from 186m and 20m @ 1.18% Cu from 216m .

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Figure 3: Hole CDH010 core photography from the high grade magmatic-hydrothermal breccia zone. Top: 231.00m, magmatic-hydrothermal breccia with predominance of diorite fragments and infill of chalcopyrite cement, sericite-illite altered (4.47% Cu, 35ppm Mo). Bottom: 240.10m, magmatic-hydrothermal breccia with fragments of diorite and quartz-eye porphyries, rhyolitic matrix with chalcopyrite-molybdenite-silica-sericite cement (0.51% Cu, 167ppm Mo).

Below 322m, mineralization continues at moderate grades within rhyolite porphyries and magmatic-hydrothermal breccias, including 36m @ 0.62% Cu from 486m . At greater depth, molybdenite-bearing B-type quartz veins occur within an interval returning 84m @ 0.40% Cu and 91ppm Mo from 660m .

In broad terms, the rhyolite porphyries intrude the intermediate-composition daci-andesitic porphyries and microdiorites. The highest copper grades in CDH010 are associated with intense white sericite–illite alteration, particularly within magmatic-hydrothermal breccias intersected between 216m and 296m downhole. Representative core photography from this zone is shown in Figure 3, and the regional context of the Cobrasco district, including the Southern Block, is shown in Figure 4.

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Figure 4: Cobrasco district soil geochemistry (Cu ppm) with +200ppm Cu soil anomaly outlines, Cobrasco Northern and Southern Blocks (Rio Tinto Comita Project block shown for reference).

The Company’s Corporate Presentation is available at: Andina Copper Corporate Presentation

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ON BEHALF OF THE BOARD

Joseph van den Elsen

President & Chief Executive Officer

joseph@andinacopper.com

Jordan Webster

VP – Technical Communications

jordan@andinacopper.com

QUALIFIED PERSON

Gustavo Zulliger, a consultant of Andina Copper Corp and a “qualified person” (“QP”) within the definition of that term in National Instrument 43-101, Standards of Disclosure for Mineral Projects, has reviewed and approved the technical information contained in this news release. Gustavo Zulliger is a Certified Professional Geologist with the American Institute of Professional Geologists (CPG #11165).

QAQC

CDH010 was collared with a PQ size drill string to a depth of 180.50m and continued with HQ/HQ3 to a final depth of 844.65m. In all cases the drill core was extracted from the core barrel by the drill contractor under the supervision of Andina Copper personnel and placed in core boxes with appropriate depth markers (core blocks) and padding added for extra protection during transport. Full core boxes were then strapped closed before being transported by helicopter and pickup truck to the Cobrasco core cutting facility in Quibdó. The drill core was cleaned where required, marked-up and photographed, prior to undergoing geotechnical and geological logging. All core segments were cut by diamond saw by Andina Copper technicians, other than the top saprolite intervals that could be cut and sampled using hand tools. All sampling was conducted in nominal 2m intervals with cut-lines marked by the supervising geologists to ensure representative sampling. Samples were placed in plastic bags with non-repeatable sample tags and bagged in polyweave sacks ready for transport.

The core trays with the remaining half-core are stored at the Andina Copper facility in Quibdó for ongoing geotechnical (Terraspec spectral analysis, magnetic susceptibility readings, rock density measurements) and follow-up detailed geological logging. From Quibdó, core samples were sent to the ALS sample preparation facility in Medellin, an accredited laboratory which is independent of the Company. Prepared sample pulps were then forwarded to the ALS laboratory in Lima, Peru for gold (Au-AA23), multi-elements (ME-MS61), and “overlimits” analysis (ME-OG62 including copper Cu-OG62). Coarse and fine rejects are routinely returned by ALS Medellin for storage at the Andina Copper storage facility.

Table 1: Cobrasco Project – Significant Drill Intercepts

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Note 1: CDH010 intervals are reported at a 0.2% Cu cutoff with maximum dilution of 20m, consistent with the convention applied to CDH004 (refer 16 February 2026 News Release). CDH001 to CDH009 intervals are as previously reported.

Note 2: Interval widths are measured down-hole and uncorrected. They do not necessarily represent true widths of mineralization.

Table 2: Cobrasco Project – Drill Collar Parameters (WGS84, UTM Zone 18N)

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ABOUT ANDINA COPPER

Andina Copper Corporation is a unique South America-focused copper explorer listed on the TSX Venture Exchange (TSXV:ANDC), Frankfurt (FSE: FIR), and OTC (OTCQB: PMMCF) exchanges. The Company holds two significant discoveries along the world’s premier copper producing Andean porphyry belt in Argentina and Colombia, and a compelling undrilled copper-gold target in the prolific copper production district of the Coastal Cordillera of Chile.

FORWARD-LOOKING STATEMENT

This news release contains certain statements that may be deemed "forward-looking statements". All statements in this release, other than statements of historical fact, that address events or developments that Andina Copper expects to occur, are forward-looking statements. Forward-looking statements are statements that are not historical facts and are generally, but not always, identified by the words "expects" and similar expressions, or that events or conditions "will" or "may" occur. These statements are subject to various risks. Although Andina Copper believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are no guarantee of future performance, and actual results may differ materially from those in forward-looking statements.

Neither the TSXV nor the Canadian Investment Regulatory Organization accepts responsibility for the adequacy or accuracy of this release.

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TheNewsWire

August 11, 2026 - 3:00 AM PDT

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