| USI | Usines Claas France( Route de Thionville ) | USINOR( Puteaux ) |
| USI Clothing, LLC | Usines Claas France( St. Remy-Woippy ) | USINOR ( Puteaux, FR ) |
| USI Clothing, LLC ( Blue Springs, MO ) | Usines Claas France S.A. ( St. Remy/Woippy, FR ) | USINOR and THYSSEN KRUPP STAHL AG |
| USI Corporation ( Chantilly, VA ) | Usines Class France( Woippy ) | USINOR S.A. ( Puteaux, FR ) |
| USI International, Inc. ( West Bend, WI ) | Usines et Acieries de Sambre et Meuse ( Feignies, FR ) | USINOR SA( Puteaux ) |
| USI Lighting, Inc. ( San Leandro, CA ) | Usines Gabriel Wattelez S.A. | Usinor Sacilor ( Puteaux, FR ) |
| USIMED L.L.C. ( Miami, FL ) | Usines Lambiotte ( Premery, FR ) | Usinor Sacilor, 4 Place de la Pyramide ( Puteaux, FR ) |
| Usina Da Barra S/A-Acucar e Alcool( Barra Bonita ) | Using Co. Ltd. ( Kowloon, HK ) | USINOR, ATOFINA |
| Usina da Barra S/A--Acucar e Alcool( Barra Bonita-SP ) | Using Co., Ltd.( Kowloon ) | USinternet working, Inc. |
| Usinage Montage et Assistance Technique | Using Co., Ltd. ( Kowloon, HK ) | Usisys Corp. ( Detroit, MI ) |
| Usinage Montage et Assistance Technique ( Loiret, FR ) | Usinor | Usitech Nov Inc. |
| USINAS SIEDERURGICAS DE MINAS GERAIS S.A. USIMINAS ( Belo Horizonte-MG, BR ) | USINOR ( 92800 Puteaux, FR ) | USL Products, Inc. ( Minneapolis, MN ) |
| Usines CLAAS France( Metz ) | USINOR( La Defense Cedex ) | |