Nexa Resources S.A.

In relation to the Magistral Project, no changes have occurred in the circumstances described in the annual financial statements as of December 31, 2025. As of the date of this report, the deadline to fulfill the Accreditable Investment Commitment remains suspended, as does the potential application of the related penalty in the amount of USD 97,029.

In relation to the guarantees for dams, there have been no changes to the regulatory framework since the annual financial statements as of December 31, 2025. The Company continues to await approval from the environmental authorities before proceeding with the remaining obligations.

As of June 30, 2026, the Company had tax assessments for the 2014–2017 fiscal years that remain subject to ongoing judicial proceedings. In connection with these matters, the Company entered into installment payment agreements with the Peruvian Tax Authority (SUNAT), under which the outstanding amounts are payable through fixed monthly installments over a period of up to 72 months. The Company continues to challenge these assessments before the ultimate competent judicial authority. Accordingly, entering into these installment agreements does not constitute acceptance of the tax authority’s position or settlement of the underlying disputes.

As of June 30, 2026, the total outstanding amount subject to the installment payment agreements was USD 124,715, representing future cash outflows payable in accordance with the agreed installment schedules, of which USD 3,042 has been recognized within "Tax liabilities". No liability has been recognized for the remaining USD 121,673, as management considers it probable that the related tax positions will be accepted by the ultimate competent judicial authority; installment payments relating to these amounts will be recorded as "Tax claim payments" within "Other assets" as the respective payments are made. For further details see note 8 (c).

..*

30 of 30