15 May 2025

Atalaya Mining Copper, S.A.

("Atalaya" or "the Company")

Environmental Authorisation Granted to San Dionisio

Expected to contribute higher-grade material for processing at Riotinto

Atalaya Mining (LSE: ATYM) is pleased to announce that the Junta de Andalucía ("JdA") has granted the Unified Environmental Authorisation (or in Spanish, Autorización Ambiental Unificada ("AAU")) to the San Dionisio deposit at Proyecto Riotinto.

The AAU allows for the expansion of mining activities at San Dionisio, which represents a key component of Atalaya's strategy to increase copper production by sourcing higher-grade material from deposits throughout the Riotinto District.

Alberto Lavandeira, CEO, commented:

"We are delighted to have received the AAU and look forward to fully integrating the San Dionisio deposit into our operations. This is a key milestone for the development of Proyecto Riotinto, and it once again demonstrates the Junta de Andalucia's support of the mining industry in the region."

Contacts:

About Atalaya Mining Copper, S.A.

Atalaya is a European copper producer that owns and operates the Proyecto Riotinto complex in southwest Spain. Atalaya's shares trade on the London Stock Exchange's Main Market under the symbol "ATYM" and Atalaya is a FTSE 250 Index constituent.

Atalaya's operations include the Cerro Colorado open pit mine and a modern 15 Mtpa processing plant, which has the potential to become a central processing hub for ore sourced from its wholly owned regional projects around Riotinto, such as Proyecto Masa Valverde and Proyecto Riotinto East. In addition, Atalaya has a phased earn-in agreement for up to 80% ownership of Cobre San Rafael S.L., which fully owns the Proyecto Touro brownfield copper project in the northwest of Spain, as well as a 99.9% interest in Proyecto Ossa Morena. For further information, please visit www.atalayamining.com