INVESTOR DAY 2026 Xavantina 53 1) Sources: Ero Reserves & Resource Reports December 31, 2020 (At Acquisition) and December 31, 2025 (Current), Ero Copper reports Resources inclusive of Reserves, for the purposes of this chart, exclusive resources have been calculated. Producing ERO COPPER CORP. Significant improvements since acquisition in 2021 Significant exploration success provides the basis for material value beyond what was visible in 2021 2025 2032 At Acquisition Current Mine Life 37 koz Au 45 koz Au At Acquisition Current Annual Production P&P 245 P&P 466 M&I 198 Inf 195 Inf 365 At Acquistion Current Reserves & Resources 1 (koz Au) +120% +22% +134%