Andina Copper Reports Positive Drill Results from Cobrasco Project

Vancouver, British Columbia — May 13, 2026 — Leads & Copy — Andina Copper Corporation (TSX-V: ANDC | FSE: FIR | OTCQB: PMMCF) has announced continuing positive drill intercepts from the Cobrasco Project in Chocó, Colombia.

Drillhole CDH008 reached a downhole depth of 652.25m, extending the Cobrasco Central Cu-Mo porphyry system northward. Mineralization starts near the surface, around 52m downhole, associated with multiple mineralized porphyry phases and related magmatic-hydrothermal breccias. Two additional drillholes, CDH009 (completed; assays pending) and CDH010 (in progress), have been completed from the same platform. Visual logging indicates sulphide mineralization consistent with the broader Cobrasco Central system in both holes.

CDH008 has further confirmed the northwest extension of the Cobrasco Cu-Mo mineralized system, yielding 272m @ 0.50% Cu, 75ppm Mo, 1.92g/t Ag from 52m, including 152m @ 0.67% Cu, 68ppm Mo, 1.90g/t Ag from 54m.

Drilled due north, CDH008 was designed to test the northern continuity and extension of the shallow mineralized zone at Cobrasco Central. Additional step-out drillholes from the same drill pad, CDH009 (completed) and CDH010 (in progress), are testing northwest and west-southwest extensions to mineralization, respectively. Assays for both holes remain pending.

The Cobrasco mineralized footprint continues to expand with successive drilling and currently stretches approximately 1,100m along strike and 550m laterally. Mineralization remains open in all directions, with further expansion potential toward the NW and WSW pending results from CDH009 and CDH010. Ongoing scout drilling continues, with further large step-out holes planned to target the NW and northern extensions of the system.

Andina Copper’s President and CEO Joseph van den Elsen said the company is systematically advancing a wide-spaced scout drilling program, actively testing the limits of the Cobrasco system with wide fans of significant step-out drillholes. He added that the system continues to grow with each successive drillhole, with the mineralization footprint already covering an area of ~1,100m x 550m, and results from CDH009 and CDH010 expected to further extend it.

Surface geochemistry and field observations suggest that the mineralization continues to the north and northwest and remains open in all directions. Preparations are underway for the mobilization of a second diamond drilling rig to support the next phase of definition drilling of Cobrasco Central and new porphyry centers still to be tested.

Drillhole CDH008 was collared from the same drill pad as CDH006 and CDH007 and drilled due north at an inclination of -50° to test the northern continuation of the shallow mineralized zone. The drillhole intersected a leached cap with intense supergene alteration developed over intermineral rhyolite porphyry. Beneath the supergene-leached zone, a 30 m interval containing chalcocite coating hypogene sulphides suggests the incipient development of secondary copper enrichment.

The strongest mineralization encountered in CDH008 is associated with several potassic and sericite-altered magmatic-hydrothermal breccias spatially related to intermineral rhyolite porphyry intrusions. Higher Cu-Mo grades are consistently associated with hydrothermal breccia phases, where chalcopyrite occurs as matrix infill and as thin cross-cutting veinlets overprinting earlier molybdenite mineralization.

Younger late-intermineral rhyolite phases were intersected between 217m and 253m, and again below 290m. At 398m, the drillhole intersected a crowded granodiorite porphyry interpreted to represent an earlier, relatively barren precursor intrusive phase.

Francisco Montes, 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.

CDH008 was collared with a PQ size drill string to a depth of 126m and continued with HQ/HQ3 to a final depth of 652.25m. 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 and padding added for extra protection during transport. Full core boxes were then sealed before being transported by helicopter and pickup truck to the Cobrasco core cutting facility in Quibdó.

Core was cleaned where required, marked-up and photographed, prior to undergoing geotechnical and geological logging. All core was cut by diamond saw by Andina Copper technicians, other than the top saprolite intervals that could be cut and sampled by 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.

From Quibdó, core samples were sent to the ALS preparation facility in Medellin, an accredited laboratory which is independent of the Company. Prepared sample pulps were then sent 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 returned by ALS Medellin for storage at the Andina Copper storage facility.

Andina Copper Corporation is a South America-focused copper explorer with two discoveries along the Andean porphyry belt in Argentina and Colombia, and a copper-gold target in Chile.

Note 1: The 272m @ 0.50% Cu, 75ppm Mo interval is constrained to maximum 10m <0.2% Cu.

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

Source: Andina Copper