NEXA PROVIDES UPDATE ON CAJAMARQUILLA OPERATION (Form 6-K)

NEXA PROVIDES UPDATE ON CAJAMARQUILLA OPERATION

Luxembourg, May 13, 2026 - Nexa Resources S.A. ("Nexa Resources", "Nexa" or the "Company") (NYSE: "NEXA") announces that operations at the Cajamarquilla smelter in Peru have been temporarily suspended following an incident this morning that resulted in a fire, which has been contained.

Personnel were evacuated from the affected areas as a precautionary measure, with the support of the Company's internal emergency response teams.

There were no fatalities. Four people sustained injuries, one Nexa employee and three contractors, and all are in stable condition.

The incident has caused damage to portions of the smelter infrastructure. Based on currently available information, the Company does not anticipate a material impact arising from this incident.

Notifications and coordination with the relevant authorities are underway as the Company assesses the timeline for the resumption of operations, while the cause of the incident remains under investigation.

About Nexa

Nexa is a large-scale, low-cost, integrated polymetallic producer, with zinc as our main product. We have over 65 years of experience developing and operating mining and smelting assets in Latin America. We currently own and operate five polymetallic mines - four long-life underground (two in the Central Andes region of Peru and two in Brazil, in the states of Minas Gerais and Mato Grosso) and one open-pit mine in the Central Andes region of Peru. We also own and operate three zinc smelters - two in the state of Minas Gerais, Brazil (Três Marias and Juiz de Fora), and one in Lima, Peru (Cajamarquilla), which is the largest zinc smelter in the Americas.