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v3.26.1

RELATED PARTY TRANSACTIONS: (Details) $ in Millions | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Dec. 31, 2020 MWh | Dec. 31, 2012 item MW | Dec. 31, 2025 USD ($) | Dec. 31, 2014 item
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | $ 10.9 |  |  |  | $ 16.2 |
Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 10.9 |  |  |  | 16.2 |
Related parties payable: | 122.5 |  |  |  | 138.4 |
Total purchases | 171.9 | $ 225.0 |  |  |  |
Total sales | $ 1.8 | 1.5 |  |  |  |
Affiliates | Compaia Minera Coimolache S.A. ("Coimolache") |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Ownership percentage (Equity method investment) | 44.20% |  |  |  |  |
Affiliates | Apu Coropuna S.R.L. |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Ownership percentage (Equity method investment) | 30.00% |  |  |  |  |
Affiliates | Minimum |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Aggregate consideration of Material Affiliate Transaction to be be authorized by the General Counsel and CFO | $ 8.0 |  |  |  |  |
Affiliates | Maximum |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Aggregate consideration of Material Affiliate Transaction to be be authorized by the General Counsel and CFO | 10.0 |  |  |  |  |
Grupo Mexico and affiliates | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Total sales | 15.5 | 59.3 |  |  |  |
Asarco LLC ("Asarco") | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 7.6 |  |  |  | 7.1 |
Related parties payable: | 38.9 |  |  |  | 61.1 |
Total purchases | 3.0 | 28.0 |  |  |  |
Total sales | 24.6 | 27.4 |  |  |  |
AMMINCO Apoyo Administrativo, S.A. de C.V. ("AMMINCO") | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | 10.1 |  |  |  | 15.9 |
Total purchases | 6.0 | 5.0 |  |  |  |
Total sales | 0.1 |  |  |  |  |
Eolica El Retiro, S.A.P.I. de C.V. |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Number of wind turbines | item |  |  |  |  |  | 37
Eolica El Retiro, S.A.P.I. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | 0.5 |  |  |  | 0.3 |
Total purchases | $ 0.3 | $ 1.0 |  |  |  |
Percentage of supply to third-party energy users | 16.60% | 11.70% |  |  |  |
Ferrocarril Mexicano, S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | $ 4.4 |  |  |  | 4.0 |
Total purchases | 23.6 | $ 21.3 |  |  |  |
Grupo Mexico and affiliates | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Total purchases | 1.8 | 1.7 |  |  |  |
Grupo Mexico Servicios | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | 2.3 |  |  |  | 3.3 |
Total purchases | 10.1 | 10.1 |  |  |  |
Mexico Generadora de Energia S. de R.L. ("MGE") | Mexico |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Number of natural gas-fired combined cycle power generating units | item |  |  |  | 2 |  |
Mexico Generadora de Energia S. de R.L. ("MGE") | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 1.1 |  |  |  | 7.6 |
Related parties payable: | 44.7 |  |  |  | 30.2 |
Total purchases | 80.9 | 109.8 |  |  |  |
Total sales | (9.3) | $ 31.9 |  |  |  |
Amount of net credit from the sale of natural gas | $ 9.3 |  |  |  |  |
Mexico Generadora de Energia S. de R.L. ("MGE") | Affiliates | Mexico |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Net total capacity (in megawatts) | MW |  |  |  | 516.2 |  |
Percentage of supply to third-party energy users | 18.30% | 0.30% |  |  |  |
Mexico Compania Constructora S.A de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | $ 9.7 |  |  |  | 12.4 |
Total purchases | 16.1 | $ 24.8 |  |  |  |
Parque Eolico de Fenicias, S. de R.L. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | 8.4 |  |  |  | 7.5 |
Total purchases | $ 22.7 | $ 20.3 |  |  |  |
Percentage of supply to third-party energy users | 98.00% | 85.50% |  |  |  |
Purchase agreement, contracted power capacity (in megawatts per year) | MWh |  |  | 611,400 |  |  |
Term of power purchase agreement related to sale of power plant |  |  | 20 years |  |  |
Grupo Mexico Servicios de Ingenieria, S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | $ 1.4 |  |  |  | 2.3 |
Total purchases | 9.3 | $ 4.7 |  |  |  |
AMMINCO, Ferrocarril Mexicano, S.A. de C.V. & Mexico Compania Constructora S.A de C.V. | Affiliates | Maximum |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 0.1 |  |  |  | 0.1 |
AMMINCO & Ferrocarril Mexicano, S.A. de C.V. | Affiliates | Maximum |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Threshold revenue from related parties | 0.1 | 0.1 |  |  |  |
Boutique Bowling de Mexico, S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties payable: | 1.1 |  |  |  | 0.8 |
Total purchases | 0.3 | 0.3 |  |  |  |
Total sales | 0.1 | 0.1 |  |  |  |
Empresarios Industriales de Mexico, S.A. de C.V | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 1.9 |  |  |  | 1.5 |
Total sales | 0.4 | 0.2 |  |  |  |
Mextransport | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 0.3 |  |  |  |  |
Related parties payable: | 0.5 |  |  |  | 0.4 |
Total purchases | 1.3 | 1.2 |  |  |  |
Total sales | 1.3 | 1.1 |  |  |  |
Operadora de Cinemas S.A. de C.V. | Affiliates |  |  |  |  |  |
RELATED PARTY TRANSACTIONS: |  |  |  |  |  |
Related parties receivable current: | 0.1 |  |  |  | 0.1 |
Related parties payable: | 0.5 |  |  |  | $ 0.3 |
Total purchases | 0.2 | 0.2 |  |  |  |
Total sales | $ 0.1 | $ 0.1 |  |  |  |

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