First Majestic Announces 2025 Mineral Reserve and Mineral Resource Estimates

Record Mineral Resources Strengthens Long-Term Value and Production Options Santo Niño Discovery Adds 27.4 Million Silver-Equivalent Ounces to Santa Elena Inferred Resources Vancouver, British Columbia--(Newsfile Corp. - March 31, 2026) - First Majestic Silver Corp. (NYSE: AG) (TSX: AG) (FSE: FMV) (the "Company" or "First Majestic") is pleased to announce its 2025 Mineral Reserve and Mineral Resource estimates for its four operating mines in Mexico and its Jerritt Canyon Gold Mine ("Jerritt Canyon") in Nevada, U.S.A., with an effective date of December 31, 2025.