| 1 | UIC | Utah Idaho Central R.R. Co. | 7/1923-7/1936 | | NAKINA |
| 2 | UIC | Utah Idaho Central R.R. | 4/1938-7/1954 | | NAKINA |
| 3 | UIC | Utah Idaho Central R.R. | 4/38-1/52 | | NRHS |
| 4 | UIC | *UTAH IDAHO CENTRAL RAILROAD CO. | | | PWRC |
| 5 | UIC | *MARCHEM LTD | | | PWRC |
| 6 | UICC | UNITED INDUSTRIAL SERVICES | | | SCAC4 |
| 7 | UICO | UNITED BRIDGE TRANSPORTATION LLC | | | SCAC4 |
| 8 | UICQ | UNDERWOOD INDUSTRIAL CONTRACTORS IN | | | SCAC4 |