| Arcelor Mittal, SA (Zumarraga) | |
| Acerinox, S.A. 阿塞里诺克斯 | Acerinox, S.A. is a stainless steel manufacturing conglomerate group based in Spain. |
| Corrugados Azpeitia | Corrugados Azpeitia S.L. (Guipúzcoa), is part of Grupo Alfonso Gallardo whose headquarters are in Jerez de los Caballeros (Badajoz). Corrugados Azpeitia specialises in the production of rebar from melting steel in an electric furnace and then hot rolling. Its main goal is to supply its products with a maximum guarantee of service to satisfy the client’s needs. |
| CELSA Group™ | CELSA Group™ is one of the largest manufacturers of steel long products in Europe, the most diversified and vertically integrated. |
| MEGASA GROUP | The MEGASA GROUP is a family-run business specialised in the production and distribution of long steel products. |