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Shareholders’ equity (Tables) | 12 Months Ended
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Dec. 31, 2025
Notes and other explanatory information [abstract] |
Schedule of accumulated other comprehensive income |
Schedule of accumulated other comprehensive income |  |  |  |
| Cumulative translation adjustment | Hedge accounting | Changes in fair value of financial instruments | Total
At January 01, 2023 | (272,880) | 1,262 | (14,213) | (285,831)
Translation adjustment on foreign subsidiaries | 81,413 | - | - | 81,413
Cash flow hedge accounting, net of income tax | - | (537) | - | (537)
Changes in fair value of financial liabilities related to changes in the Company’s own credit risk | - | - | (385) | (385)
Changes in fair value of investments in equity instruments | - | - | (1,466) | (1,466)
At December 31, 2023 | (191,467) | 725 | (16,064) | (206,806)
Translation adjustment on foreign subsidiaries | (184,446) | - | - | (184,446)
Cash flow hedge accounting, net of income tax | - | 109 | - | 109
Changes in fair value of financial liabilities related to changes in the Company’s own credit risk | - | - | (1,037) | (1,037)
Changes in fair value of investments in equity instruments | - | - | (1,256) | (1,256)
At December 31, 2024 | (375,913) | 834 | (18,357) | (393,436)
Translation adjustment on foreign subsidiaries | 79,357 | - | - | 79,357
Cash flow hedge accounting, net of income tax | - | (3,801) | - | (3,801)
Changes in fair value of financial liabilities related to changes in the Company’s own credit risk | - | - | (218) | (218)
Changes in fair value of investments in equity instruments | - | - | 126 | 126
At December 31, 2025 | (296,556) | (2,967) | (18,449) | (317,972)
Attributable to NEXA's shareholders |  |  |  | (266,300)
Attributable to non-controlling interests |  |  |  | (51,672)
Schedule of earnings per share information |
Schedule of earnings per share information |  |  |  |  |
| 2025 |  | 2024 |  | 2023
Net income (loss) for the year attributable to NEXA's shareholders | 132,626 |  | (205,030) |  | (291,968)
Weighted average number of outstanding shares – in thousands | 132,439 |  | 132,439 |  | 132,439
Earnings (losses) per share - USD | 1.00 |  | (1.55) |  | (2.20)
Schedule of non-controlling interest |
Schedule of non-controlling interest |  |  |  |  |
Summarized balance sheet | NEXA PERU |  | Pollarix S.A.
2025 | 2024 |  | 2025 | 2024
Current assets | 847,874 | 840,727 |  | 44,390 | 21,597
Current liabilities | 427,941 | 381,329 |  | 36,714 | 8,169
Current net assets | 419,933 | 459,398 |  | 7,676 | 13,428
Non-current assets | 1,495,772 | 1,176,393 |  | 60,627 | 53,843
Non-current liabilities | 518,914 | 422,555 |  | 7,647 | 11,099
Non-current net assets | 976,858 | 753,838 |  | 52,980 | 42,744
Net assets | 1,396,791 | 1,213,236 |  | 60,656 | 56,172
Accumulated non-controlling interests | 242,227 | 205,102 |  | 44,402 | 42,569
Summarized income statement | NEXA PERU |  | Pollarix S,A,
2025 | 2024 |  | 2025 | 2024
Net revenues | 1,063,503 | 881,122 |  | 32,845 | 27,919
Net (loss) gain for the year | 276,866 | (41,999) |  | 46,783 | 28,959
Other comprehensive income | - | - |  | 7,932 | (14,886)
Total comprehensive income for the year | 276,866 | (41,999) |  | 54,715 | 14,073
Comprehensive income attributable to non-controlling interests | 53,258 | (5,229) |  | 43,459 | 15,026
Dividends paid to non-controlling interests | 17,179 | 5,938 |  | 17,088 | 14,616
Summarized statement of cash flows | NEXA PERU |  | Pollarix S,A,
2025 | 2024 |  | 2025 | 2024
Net cash provided by (used in) operating activities | 152,509 | 244,940 |  | 27,532 | (11,615)
Net cash used in investing activities | (155,881) | (108,007) |  | 3,185 | 2,130
Net cash (used in) provided by financing activities | (113,055) | (16,245) |  | (2,462) | 13,783
(Decrease) increase in cash and cash equivalents | (116,427) | 120,688 |  | 28,255 | 4,298
On January 15, 2025, Nexa El Porvenir paid USD 3,453 and non-controlling shareholders paid USD 1,864 for the subscription of newly issued shares of Nexa Atacocha. Since Nexa El Porvenir subscribed to its portion of the capital increase in December 2024, while non-controlling shareholders completed their subscription in January 2025, its ownership interest in Nexa Atacocha decreased from 86.65% as of December 31, 2024, to 82.11%. Nexa El Porvenir recognized a gain of USD 1,005 from the dilution of its ownership interest, due to Atacocha’ s negative equity, which was recorded in equity attributable to Nexa’s controlling interest, while a loss of USD 1,016 was allocated to the non-controlling shareholders. On July 17, 2025, Nexa El Porvenir, which owned 82.11% of Nexa Atacocha, launched a Voluntary Public Tender Offer (OPA) through the Lima Stock Exchange (BVL), under the supervision of the Peruvian Securities Market Authority (SMV), to acquire up to the remaining 17.89% of Atacocha’s shares held by non-controlling interests. The tender offer remained open until September 3, 2025. Following the completion of Tender Offer, 0.89% of the shares were acquired for USD 502, resulting in an increase in Nexa El Porvenir’s controlling ownership interest in Nexa Atacocha from 82.11% to 83.00%. As a result, the non-controlling interest decreased from 17.89% to 17.00. Consequently, a total reduction of USD 502 was recorded in equity, of which USD 492 was recognized in retained earnings attributable to the controlling interest and USD 10 to the non-controlling interest.

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