First Quantum files La Granja resource update, estimates 23 million tonnes copper M&I

• First Quantum filed NI 43-101 technical report for La Granja copper project in northern Peru, updating mineral resources effective Dec. 31, 2025.
• Measured and indicated resources totaled 4,831 million tonnes at 0.48% copper, containing 23 million tonnes of copper; inferred resources totaled 5,206 million tonnes at 0.40% copper, containing 20.7 million tonnes, using 0.16% Cu cut-off.
• Project is 55% owned by First Quantum, 45% by Rio Tinto; no mineral reserves declared.
• Concept work points to large-scale open-pit mine; pit optimization used copper price of USD 4 per pound with copper-only breakeven cut-off grade of 0.16%.
• Development focus shifted to permitting, with detailed environmental impact assessment work underway and scheduled to commence in 2026.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. First Quantum Minerals Ltd. published the original content used to generate this news brief via GlobeNewswire (Ref. ID: 202605111701PRIMZONEFULLFEED9717790) on May 11, 2026, and is solely responsible for the information contained therein.