| 1 | OSKA | OSKAM, TEUNIS | | | SCAC3 |
| 2 | OSKI | OSTANKINO SHIPPING COMPANY LIMITED | | | SCAC3 |
| 3 | OSKK | OSKR TRUCKING | | | SCAC4 |
| 4 | OSKL | OSKALOOSA GRAIN LTD | | | SCAC4 |
| 5 | OSKO | OSKALOOSA TRANSPORT | | | SCAC3 |
| 6 | OSKP | OSTERKAMP TRUCKING INC | | | SCAC3 |
| 7 | OSKT | OSTERKAMP TRUCKING COMPANY | | | SCAC3 |
| 8 | OSKU | OCEANIC STAR LINE LTD | | UAE | BIC |
| 9 | OSKU | OSK PROJEKTMANAGEMENT GMBH | | | SCAC4 |
| 10 | OSKX | Sunray D-X Oil Co. | eliminated 10/1967 | | NAKINA |
| 11 | OSKX | Oil States Tank Car Corp. (Sunray D-X Oil Co.) | 10/1966 | | NAKINA |
| 12 | OSKX | Sunray D-X Oil Co. | added 7/1962; 7/1965 | | NAKINA |
| 13 | OSKX | D-X Sunray Oil Co. | 10/1957-4/1961; eliminated 7/1962 | | NAKINA |
| 14 | OSKX | Oil States Tank Car Corp. | 7/1935 | | NAKINA |
| 15 | OSKX | Mid-Continent Petroleum Corp. | 7/1937-7/1954 | | NAKINA |
| 16 | OSKX | Oil States Tank Car Corp. (Mid-Continent Petroleum Corp.) | Apr-38 | | NRHS |
| 17 | OSKX | Mid-Continent Petroleum Corp. | Jan-52 | | NRHS |
| 18 | OSKX | D-X Sunray Oil Co. | 10/57-4/61 | | NRHS |
| 19 | OSKX | Sunray D-X Oil Co. | Jul-65 | | NRHS |
| 20 | OSKX | Oil States Tank Car Corp. (Sunray D-X Oil Co.) | Oct-66 | | NRHS |
| 21 | OSKX | Sunray D-X Oil Co. | eliminated 10/67 | | NRHS |
| 22 | OSKX | SUNRAY D-X OIL CO. {D-X SUNRAY; MID-CONTINENT PETROLEUM CORP.} | | | PWRC |
