| 1 | OVR | Ohio Valley R.R. Co. | 7/2005 | | NAKINA |
| 2 | OVR | OHIO VALLEY RAILROAD CO. | | | PWRC |
| 3 | OVR | Ohio Valley Railroad | | | RSRV |
| 4 | OVRB | OVERBYE TRANSPORT INC | | | SCAC4 |
| 5 | OVRF | OVERLAND FREIGHT LINES LTD (OFI) | | | SCAC4 |
| 6 | OVRL | OVERLAND TRANSFER CO, INC | | | SCAC3 |
| 7 | OVRN | OVERNITE SERVICE INC | | | SCAC3 |
| 8 | OVRN | OVERNITE SERVICE INC | | | SCAC4 |
| 9 | OVRP | OVERPECK TRUCKING COMPANY | | | SCAC3 |
| 10 | OVRP | OVERFLOW LOGISTICS INC | | | SCAC4 |
| 11 | OVRQ | OVERMYER WAREHOUSE | | | SCAC3 |
| 12 | OVRR | OZARK VALLEY RAILROAD INC. | | | PWRC |
| 13 | OVRR | OZARK VALLEY RAILROAD INC | | | SCAC4 |
| 14 | OVRS | OVERSEAS SHIPPING INC | | | SCAC3 |
| 15 | OVRT | OVER ROAD TRANSPORT INC | | | SCAC3 |
| 16 | OVRT | OVERFLOW TRACTOR SERVICE LTD | | | SCAC4 |
| 17 | OVRX | Ohio Valley Refining Co. | 8/1920-7/1930 | | NAKINA |
| 18 | OVRX | OHIO VALLEY RAILROAD CO. | | | PWRC |
