The Qualified Persons for the estimation of the Mineral Reserves for Cerro Lindo is Cristovao Teofilo dos Santos, B.Eng., a Nexa employee, El Porvenir and Vazante is Vitor Marcos Teixeira de Aguilar, B.Eng., a Nexa employee, and for Aripuanã is SLR Consulting (Canada) Ltd. Mineral Reserves have an effective date of December 31, 2022, for Cerro Lindo, El Porvenir, Vazante and Aripuanã mines. 2014 CIM Definition Standards were followed for Mineral Reserves, which are consistent with definitions used under Subpart 1300 of Regulation S-K. Mineral Reserves are reported within engineered stope outlines assuming the following underground mining methods: El Porvenir and Vazante - SLS and C&F; Cerro Lindo - SLS; and Aripuanã - longitudinal longhole retreat (bench stopping) and transverse longhole mining (VRM). Dilution and mining recovery are considered. At Cerro Lindo, Mineral Reserves are estimated at an NSR break-even cut-off value of US$42.65/t processed.