Nexa Resources Announces 2025 Year-End Mineral Reserves and Mineral Resources

Core Viewpoint - Nexa Resources S.A. reported a 4.4% increase in consolidated Mineral Reserves to 115.1 million tonnes as of December 31, 2025, driven by successful near-mine exploration and resource conversion drilling [2][5]. Mineral Reserves - Proven and Probable Mineral Reserves totaled 115.1 million tonnes, containing 4,047kt of zinc at an average grade of 3.52%, reflecting a 4.4% increase from 110.3 million tonnes in 2024 [5]. - The increase in Mineral Reserves was primarily due to the conversion of lower-grade resources becoming economically viable under updated price assumptions, despite a decrease in average zinc grade [5]. - Mineral Reserve additions of 282kt in contained zinc partially offset annual depletion of 373kt, indicating continued replacement through near-mine exploration [5]. - Significant contributions to Mineral Reserves came from Vazante (+140kt), Cerro Lindo (+82kt), El Porvenir (+46kt), Aripuanã (+7kt), and Atacocha (+7kt) [5]. Mineral Resources - As of December 31, 2025, Measured and Indicated Mineral Resources were estimated at 3,120kt of contained zinc, a decrease from 3,163kt in 2024, primarily due to the conversion of resources into Mineral Reserves [11]. - Inferred Mineral Resources were estimated at 6,935kt of contained zinc, down from 7,072kt in 2024, mainly due to the conversion of resources to reserves and geological model updates [11]. - The most significant addition to Inferred Mineral Resources came from the Integración target at the Cerro Pasco Complex, adding 116kt of contained zinc [11]. Life-of-Mine Extensions - Current life-of-mine plans have been extended to 2041 at Aripuanã, 2036 at El Porvenir and Atacocha Underground, 2034 at Vazante, 2032 at Cerro Lindo, and 2028 at Atacocha Open Pit, reflecting the impact of the 2025 exploration program [7].