EXHIBIT 8.1
Principal subsidiaries
The following is a list of Ternium’s subsidiaries at December 31, 2025.
| | | | | | | | | | | | | | | | | |
| Company | Country of Organization | Main activity | Percentage of ownership at December 31, |
| 2025 | 2024 | 2023 |
| | | | | |
| Ternium S.A. | Luxembourg | Holding | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium Investments S.à.r.l. | Luxembourg | Holding, financial services and agency trading activities | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium Internacional España S.L. (1) | Spain | Holding and marketing of steel products | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium Solutions S.A. (1) | Uruguay | Other services | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium Internationaal B.V. (1) | Netherlands | Marketing of steel products | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium USA Inc. (2) | USA | Manufacturing and selling of steel products | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium Argentina S.A. (3) | Argentina | Manufacturing and selling of flat steel products | 62.57 | % | 62.57 | % | 62.57 | % |
| Prosid Investments S.A. (4) | Uruguay | Holding | 62.58 | % | 62.58 | % | 62.58 | % |
| Ternium Mexico S.A. de C.V. (5) | Mexico | Manufacturing and selling of steel products | 89.25 | % | 89.25 | % | 89.25 | % |
| Las Encinas S.A. de C.V. (6) | Mexico | Exploration, exploitation and pelletizing of iron ore | 89.25 | % | 89.25 | % | 89.25 | % |
| Ferropak Comercial S.A. de C.V. (6) | Mexico | Scrap services company | 89.25 | % | 89.25 | % | 89.25 | % |
| Transamerica E. & I. Trading Corp. (6) | USA | Scrap services company | 89.25 | % | 89.25 | % | 89.25 | % |
| Galvacer Chile S.A. (6) | Chile | Distributing company | 89.25 | % | 89.25 | % | 89.25 | % |
| Ternium Gas México S.A. de C.V. (7) | Mexico | Energy services company | 89.25 | % | 89.25 | % | 89.25 | % |
| Consorcio Minero Benito Juarez Peña Colorada S.A.de C.V. (8) | Mexico | Exploration, exploitation and pelletizing of iron ore | 44.62 | % | 44.62 | % | 44.62 | % |
| Exiros B.V. (8) | Netherlands | Procurement and trading services | 50.00 | % | 50.00 | % | 50.00 | % |
| Servicios Integrales Nova de Monterrey S.A. de C.V. (9) | Mexico | Medical and Social Services | 66.49 | % | 66.49 | % | 66.49 | % |
| Ternium Internacional Nicaragua S.A. | Nicaragua | Manufacturing and selling of steel products | 99.38 | % | 99.38 | % | 99.38 | % |
| Ternium Internacional Honduras S.A. de C.V. | Honduras | Manufacturing and selling of steel products | 99.18 | % | 99.18 | % | 99.18 | % |
| Ternium Internacional El Salvador S.A. de C.V. | El Salvador | Manufacturing and selling of steel products | 99.92 | % | 99.92 | % | 99.92 | % |
| Ternium Internacional Costa Rica S.A. | Costa Rica | Manufacturing and selling of steel products | 99.98 | % | 99.98 | % | 99.98 | % |
| Ternium Internacional Guatemala S.A. (10) | Guatemala | Manufacturing and selling of steel products | 99.98 | % | 99.98 | % | 99.98 | % |
| Ternium Colombia S.A.S. (11) | Colombia | Manufacturing and selling of steel products | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium del Atlántico S.A.S (11) | Colombia | Manufacturing and selling of steel products | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium Procurement S.A. (11) | Uruguay | Marketing of steel products and procurement services | 100.00 | % | 100.00 | % | 100.00 | % |
| Technology & Engineering Services S.A. (11) | Uruguay | Engineering and other services | 100.00 | % | 100.00 | % | 100.00 | % |
| Ternium Brasil Ltda. (12) | Brazil | Manufacturing and selling of steel products | 100.00 | % | 100.00 | % | 100.00 | % |
| Tenigal S. de R.L. de C.V. (13) | Mexico | Manufacturing and selling of steel products | 51.00 | % | 51.00 | % | 51.00 | % |
| Soluciones Integrales de Gestión S.A. (14) | Argentina | Other services | 100.00 | % | 100.00 | % | 100.00 | % |
| Usinas Siderúrgicas de Minas Gerais S.A. (15) | Brazil | Manufacturing and selling of steel products | 23.30 | % | 23.30 | % | 23.30 | % |
| Mineração Usiminas S.A. (16) | Brazil | Exploration, exploitation and pelletizing of iron ore | 16.31 | % | 16.31 | % | 16.31 | % |
| Soluções Em Aço Usiminas S.A. (17) | Brazil | Manufacturing and selling of steel products | 16.05 | % | 16.05 | % | 16.05 | % |
| Usiminas Mecânica S.A. (18) | Brazil | Engineering and other services | 23.30 | % | 23.30 | % | 23.30 | % |
| Usiminas International S.À R.L. (19) | Luxembourg | Holding | 23.30 | % | 23.30 | % | 23.30 | % |
| Usiminas Participações E Logística S.A. (20) | Brazil | Logistics and distribution of steel-derived products | 17.48 | % | 17.48 | % | 17.48 | % |
| Metalcentro Ltda. (21) | Brazil | Other services | 23.30 | % | 23.30 | % | 23.30 | % |
| Vientos de Olavarría S.A. (22) | Argentina | Renewable energy projects. | 0 | 62.57 | % | 62.57 | % |
| Ternium del Cauca S.A.S. (23) | Colombia | Manufacturing and selling of steel products | 0 | 100.00 | % | 100.00 | % |
| Rios Unidos logistica e transporte de açõ Ltda. (24) | Brazil | Logistics and distribution of steel-derived products | 0 | 0 | 23.30 | % |
| | | | | |
| | | | | |
(1) Indirectly through Ternium Investments S.à.r.l. Total voting rights held: 100.00%.
(2) Indirectly through Ternium Internacional España S.L. Total voting rights held 100.00%.
(3) Indirectly through Ternium Internacional España S.L. Total voting rights held 62.57%.
(4) Indirectly through Ternium Argentina S.A. and Ternium Procurement S.A. Total voting rights held 100.00%.
(5) Indirectly through Ternium Argentina S.A. and Ternium Internacional España S.L. Total voting rights held 100.00%.
(6) Indirectly through Ternium Mexico S.A. de C.V. Total voting rights held: 100.00%.
(7) Indirectly through Ternium Mexico S.A. de C.V. and Tenigal S. de R.L. de C.V. Total voting rights held: 100.00%.
(8) Total voting rights held: 50.00%. The Company recognizes the assets, liabilities, revenue and expenses in relation to its interest in the joint operation.
(9) Indirectly through Ternium Mexico S.A. de C.V. Total voting rights held: 74.50%.
(10) Indirectly through Ternium Internacional España S.L. and Ternium Mexico S.A. de C.V. Total voting rights held: 100.00%.
(11) Indirectly through Ternium Internacional España S.L. Total voting rights held: 100.00%.
(12) Indirectly through Ternium Internacional España S.L. Total voting rights held: 100.00%.
(13) Indirectly through Ternium Internacional España S.L. Total voting rights held: 51.00%.
(14) Indirectly through Ternium Investments S.à r.l. and Ternium Internacional España S.L. Total voting rights held 100.00%.
(15) Indirectly through Ternium Investments S.à r.l., Prosid Investments S.A. and Ternium Argentina S.A. Total voting rights held 42.57%.
(16) Indirectly through Usinas Siderúrgicas de Minas Gerais S.A. Total voting rights held 29.80%.
(17) Indirectly through Usinas Siderúrgicas de Minas Gerais S.A. Total voting rights held 29.32%.
(18) Indirectly through Usinas Siderúrgicas de Minas Gerais S.A. Total voting rights held 42.57%.
(19) Indirectly through Usinas Siderúrgicas de Minas Gerais S.A. Total voting rights held 42.57%.
(20) Indirectly through Usinas Siderúrgicas de Minas Gerais S.A. and Mineração Usiminas S.A. Total voting rights held 36.20%.
(21) Indirectly through Usinas Siderúrgicas de Minas Gerais S.A. and Usiminas Mecânica S.A. Total voting rights held 42.57%.
(22) This company was merged into Ternium Argentina S.A effective as of January 1, 2025.
(23) This company was dissolved as of June 4, 2025.
(24) This company was merged into Usinas Siderúrgicas de Minas Gerais S.A. as of April 25, 2024.