Mr. Joseph van den Elsen reports

ANDINA COPPER ACCELERATES EXPLORATION AT PIUQUENES, ARGENTINA

Andina Copper Corp. has provided an update on the comprehensive exploration program under way at the company's Piuquenes porphyry copper-gold discovery in San Juan, Argentina.

This substantive 2025 to 2026 exploration program comprising systematic surface geochemistry, multiple geophysical surveys and targeted delineation drilling is designed to significantly advance the Piuquenes Central and Piuquenes East discoveries, and to define and test other high-priority porphyry copper-gold targets across the company's 2,500-hectare land package immediately adjacent to Aldebaran Resources' preliminary economic assessment stage Altar porphyry copper-gold project.

Highlights

Comprehensive exploration program in progress at Piuquenes:

• Initial 3,000 metres of diamond drilling commencing early January, 2026, to test compelling new targets generated by surface exploration and geophysics and extensions of the Piuquenes East porphyry discovery (refer to April 30, 2025, news release):
  • 208 m at 0.31 per cent Cu (copper), 0.13 g/t (gram per tonne) Au (gold), 1.24 g/t Ag (silver) (from 292 m);
  • Including 98 m at 0.49 per cent Cu, 0.16 g/t Au, 1.26 g/t Ag (from 292 m).
• Large-scale soil geochemistry program comprising 600 samples on a 100 m by 100 m grid (full property coverage);
• Three complementary geophysical surveys currently being completed:
  • Drone magnetics (full property coverage);
  • Deep-penetrating ground magnetotellurics (MT) (full property coverage);
  • Induced polarization (IP) at Piuquenes East.

President and chief executive officer Joseph van den Elsen commented:

"Andina Copper is entering a catalyst-rich period with strong, exploration driven news flow being generated across all three of our projects. The 2025 to 2026 field season is well under way at Piuquenes, exploration is continuing at pace at Cobrasco and follow-up exploration will shortly commence at Mantau. With significant concurrent programs running across our highly compelling project portfolio, 2026 promises to be an exciting time for Andina Copper shareholders."

Diamond drilling (to commence January, 2026)

Andina will commence an approximately 3,000 m diamond drilling program in the first week of January, 2026, initially focused on expanding on last season's porphyry copper-gold discovery at Piuquenes East. Initial drilling will test a compelling parallel magnetic (MVI) geophysical anomaly and extensions of mineralization approximately 200 m below the PIU06-2025 discovery hole intersection (refer to April 30, 2025, news release):

• 208 m at 0.31 per cent Cu, 0.13 g/t Au, 1.24 g/t Ag (from 292 m);
• Including 98 m at 0.49 per cent Cu, 0.16 g/t Au, 1.26 g/t Ag (from 292 m).

Drilling is expected to continue through to April, 2026.

Surface geochemistry program under way

A large-scale soil geochemical sampling program is under way across the entire project area of greater than 2,000 hectares, with approximately 600 soil samples being collected on a systematic 100 m by 100 m grid. All samples will be analyzed by ALS laboratories for gold and multielement geochemistry, with assay results expected in January, 2026.

The program is designed to delineate Cu-Au and associated pathfinder element anomalies, particularly in areas of limited outcrop, and to improve geological interpretation across the broader project area.

Geophysical survey programs under way

Three complementary geophysical programs are in progress to advance drill targeting across the project area.

A property-wide drone magnetic survey, comprising approximately 103 line km at 200 m line spacing, has been designed to define magnetic centres, demagnetized alteration zones and major structural controls. In parallel, a magnetotelluric (MT) geophysical survey consisting of 116 stations on a 400 m by 400 m grid is being conducted to a depth of investigation of up to 2,000 m, aimed at identifying deep conductive and resistive bodies associated with porphyry mineralization. Preliminary MT results are expected in January, 2026.

An induced polarization (IP) geophysical survey comprised of five lines totalling seven line kilometres is also under way across the Piuquenes East target area. This program is designed to test for extensions to previously intersected mineralization in PIU06-2025 (refer to April 30, 2025, news release) as well as a parallel magnetics-MVI geophysical target. A follow-up IP geophysical program is planned for February, 2026, guided by results from the soil geochemistry and drone magnetics surveys.

Strategic objective

The Piuquenes project is located immediately adjacent to Aldebaran Resources' Altar project, a large copper-gold porphyry system in the Central Andes Miocene belt that hosts a multibillion-tonne mineral resource (as reported in its most recent preliminary economic assessment (PEA) (refer to Aldebaran Resources Oct. 30, 2025, news release). The Central Andes Miocene belt also hosts several other major copper deposits including Los Azules (McEwen Mining), Los Pelambres (Antofagasta) and El Pachon (Glencore), within a well-endowed metallogenic corridor of San Juan province, Argentina, and neighbouring Chile.

The integrated application of surface geochemistry (rock and soil data), drone magnetics, magnetotellurics (MT), induced polarisation (IP) and targeted diamond drilling is designed to systematically enhance understanding of the known porphyry targets (geology, alteration, mineralogy, structure and geotechnical parameters) delineate additional porphyry centres across the Piuquenes project. This integrated approach will improve target definition, reduce geological risk, and enable more rapid and effective drill testing of priority copper targets.

Qualified person

Francisco Montes, a consultant of Andina Copper and a qualified person (QP) within the definition of that term in National Instrument 43-101 -- Standards of Disclosure for Mineral Projects, has verified the scientific and technical information that forms the basis for this news release. Francisco Montes is a member of Australian Institute of Geoscientists (MAIG No. 4160).

About Andina Copper Corp.

Andina Copper is a unique South America-focused copper explorer listed on the TSX Venture Exchange, Frankfurt 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.

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