First Quantum Provides Notice of Third Quarter 2025 Results

NEWS RELEASE 25-30 September 30, 2025

www.first-quantum.com

FIRST QUANTUM PROVIDES NOTICE OF THIRD QUARTER 2025 RESULTS

Toronto, Ontario (September 30, 2025) - First Quantum Minerals Ltd. (“First Quantum” or the “Company”) (TSX: FM) will release third quarter 2025 financial and operating results on Tuesday, October 28, 2025 after the close of the Toronto Stock Exchange. The Company will host a conference call and webcast to discuss the results on Wednesday , October 29, 2025 at 9:00 am (ET).

Conference call and webcast details:

Toll-free North America: 1-800-715-9871 International: +1-646-307-1963 Conference ID: 8111752 Webcast: Direct link or on our website

A replay of the webcast will be available on the First Quantum website.

For further information, visit our website at www.first-quantum.com or contact:

Investor Relations:

Bonita To, Director, Investor Relations (416) 361-6400 Toll-free: 1 (888) 688-6577 E-Mail: [email protected]