First Quantum Minerals Ltd. , in connection with the offer to purchase for cash any and all of its outstanding 6.875% Senior Notes due 2027 from holders of the Notes , as further described in the offer to purchase and the related Notice of Guaranteed Delivery, each dated August 6, 2025, and as previously announced on August 6, 2025, hereby announces that, following the upsizing and pricing of the New Notes, the Company is extending the Price Determination Date from 2:00 p.m., New York City time, on August 12, 2025 to 2:00 p.m., New York City time, on August 18, 2025, the Expiration Date from 5:00 p.m., New York City time, on August 12, 2025 to 5:00 p.m., New York City time, on August 18, 2025, the Guaranteed Delivery Date from 5:00 p.m., New York City time, on August 14, 2025...