| 1 | USIC | U.S. INTERMODAL CORP. | | | PWRC |
| 2 | USIC | U S INTERMODAL CORP OF SOUTH CAROLI | | | SCAC4 |
| 3 | USIE | U S INTER-MEX TRANSPORTATION INC | | | SCAC4 |
| 4 | USII | USA TRANSFER INTERNATIONAL INC | | | SCAC4 |
| 5 | USIL | USA TRUCK INC (LOGISTICS OPERATIONS | | | SCAC4 |
| 6 | USIM | U S INTERMODAL MARITIME INC | | | SCAC4 |
| 7 | USIO | US & INTERNATIONAL BOUND MAIL INC | | | SCAC4 |
| 8 | USIR | USA TRUCK INC (REGIONAL OPERATIONS) | | | SCAC4 |
| 9 | USIS | UTILICASE SOLUTIONS INC | | | SCAC4 |
| 10 | USIT | USA TRUCK, INC. | | | SCAC1 |
| 11 | USIT | USA Truck | | | SCAC2 |
| 12 | USIT | USA TRUCK INC | | | SCAC4 |
| 13 | USIU | USA TRUCK INC | | | SCAC4 |
| 14 | USIV | USA SERVICES INCORPORATED | | | SCAC4 |
| 15 | USIX | U.S. Industrial Alcohol Co. | 7/1937-4/1938 | | NAKINA |
| 16 | USIX | U.S. Industrial Chemicals, Inc. | 1/1941-1/1946 | | NAKINA |
| 17 | USIX | U.S. Industrial Chemicals Co., Division of National Distillers and Chemical Corp. | added 10/1977; 1/1980; eliminated 7/1987 | | NAKINA |
| 18 | USIX | USI Chemicals Co., Division of National Distillers & Chemical Corp. | added 7/1987; eliminated 7/1988 | | NAKINA |
| 19 | USIX | Quantum Chemical Corp., USI Division | added 7/1988; 1/1994; eliminated 4/1998 | | NAKINA |
| 20 | USIX | Equistar Chemicals, LP | added 4/1998; 7/2000-7/2005; eliminated 10/2007 | | NAKINA |
| 21 | USIX | U.S. Industrial Alcohol Co. | Apr-38 | | NRHS |
| 22 | USIX | U.S. Industrial Chemicals Co., Division of National Distillers and Chemical Corp. | 1/80; eliminated 7/87 | | NRHS |
| 23 | USIX | USI Chemicals Co., Division of National Distillers & Chemical Corp. | added 7/87; eliminated 7/88 | | NRHS |
| 24 | USIX | Quantum Chemical Corp., USI Division | added 7/88; 1/94; eliminated 4/98 | | NRHS |
| 25 | USIX | Equistar Chemicals, LP | added 4/98; 7/2000 | | NRHS |
| 26 | USIX | EQUISTAR CHEMICALS LP [QUANTUM CHEMICAL CORPORATION, US INDUSTRIAL CHEMICALS DIV.; US INDUSTRIAL ALCOHOL CO.] | | | PWRC |
| 27 | USIX | US Industrial Chemicals | | | RSRV |
| 28 | USIX | EQUISTAR CHEMICALS LP | | | SCAC4 |
| 29 | USIZ | UNITED STATES SILICA | | | PWRC |
