First Majestic Files NI 43-101 Technical Report for the Los Gatos Silver Mine

Vancouver, British Columbia--(Newsfile Corp. - August 25, 2026) - First Majestic Silver Corp. (NYSE: AG) (TSX: AG) (FSE: FMV) (the "Company" or "First Majestic") is pleased to announce that it has filed a technical report for its Los Gatos Silver Mine ("Los Gatos") entitled "NI 43-101 Technical Report on Mineral Resource and Mineral Reserve Estimates, Los Gatos Silver Mine" (the "Technical Report").

The Technical Report has an effective date of August 25, 2026 and supports the Los Gatos Mineral Resource and Mineral Reserve estimates effective December 31, 2025. The Technical Report was prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101") by Gonzalo Mercado, P.Geo., David Rowe, CPG, AIPG, Andrew Pocock, P.Eng., Hector Mezquita, RM MMSA and María Elena Vázquez Jaimes, P.Geo., all of whom are employed by First Majestic and are Qualified Persons (as defined under NI 43-101).