| 1 | OSE | Ostsächsische Eisenbahnfreunde e.V. | Löbau / Bautzen | D | privat-bahn.de |
| 2 | OSE | | | GR | TRAFFIC |
| 3 | OSE | Organismos Sidirodromon Ellados | | EL | VKM |
| 4 | OSEC | OAKES & SONS ENTERPRIZE CO LLC | | | SCAC4 |
| 5 | OSEE | ONE SIX EIGHT THREE ONE FOUR | | | SCAC4 |
| 6 | OSEE | Ostseebus | | D | TRAFFIC |
| 7 | OSEF | ONE SIX EIGHT SEVEN FIVE ONE | | | SCAC4 |
| 8 | OSEF | Ostsächsische Eisenbahnfreunde e.V | | DE | VKM |
| 9 | OSEK | Austrovapor Bahnnostalgie Veranstaltungs GmbH | | AT | VKM |
| 10 | OSEP | OCEAN STATE EXPRESS INC | | | SCAC3 |
| 11 | OSER | OSER LEASING COMPANY INC | | | SCAC3 |
| 12 | OSER | OBSCURA SANCHEZ, EDUARDO ERIC | | | SCAC4 |
| 13 | OSES | OHIO SOUTHERN EXPRESS INC | | | SCAC3 |
| 14 | OSEY | OSPREY EQUIPMENT CORPORATION | | | SCAC4 |
