ATEX is exploring the 100% owned Valeriano copper-gold project located 125km east of Vallenar city, within the Link Belt, in north-central Chile. The Company is focused on definition and extension of the copper-gold porphyry resource, expansion of the high-grade breccia B2B zone above the porphyry horizon and step out drilling to expand the known mineralized footprint.

Valeriano is adjacent to the El Encierro deposit, majority owned by Antofagasta. The project is within a 120-km long zone – internally referred as the Link Belt – connecting the Maricunga gold porphyry belt to the El Indio high-sulphidation gold-epithermal belt that hosts significant copper-gold deposits. Other companies active in this area include BHP, Agnico Eagle, Teck Resources, Newmont Mining and Lundin Mining.

Valeriano hosts a large copper-gold porphyry Mineral Resource: Indicated Resource component of 475 Mt at 0.88% CuEq (0.58% Cu, 0.25 g/t Au, 1.39 g/t Ag and 70.4 g/t Mo) at a cutoff grade of 0.35% Cu, and an Inferred Resource component of 1,511 Mt at 0.75% CuEq (0.50% Cu, 0.20 g/t Au, 1.16 g/t Ag and 70.6 g/t Mo), at a cut-off grade of 0.35% Cu¹.

Agnico Eagle Mines is the largest cornerstone investor investing C$55 million in 2024, followed by Pierre Lassonde as the second-largest shareholder.

¹ Please see news release, “ATEX Reports Updated Mineral Resource Estimate of 475 million tonnes of 0.88% CuEq Indicated and 1.5 billion tonnes of 0.75% CuEq Inferred” reported on September 23, 2025, and available at www.sedarplus.com and www.atexresources.com .