| 1 | SDWB | STEWARD, W B & SON | | | SCAC4 |
| 2 | SDWE | STUDIO WEST LTD | | | SCAC4 |
| 3 | SDWF | SCHINDEWOLF EXPRESS INC | | | SCAC4 |
| 4 | SDWG | SANCTIFIED TOWING LLC | | | SCAC4 |
| 5 | SDWK | SADOWSKY | | | SCAC4 |
| 6 | SDWL | SHADOW LINES | | | SCAC4 |
| 7 | SDWM | SILVER DEW WORMS | | | SCAC4 |
| 8 | SDWN | SIDHWAN TRANSPORTATION LTD | | | SCAC4 |
| 9 | SDWP | SHADOW TRANSPORT INC | | | SCAC4 |
| 10 | SDWQ | SOUTHERN DRAWL LLC | | | SCAC4 |
| 11 | SDWT | SPEEDWELL TRANSPORTATION INC | | | SCAC4 |
| 12 | SDWU | FRANS DE WIT INTERNATIONAL BV | | NL | BIC |
| 13 | SDWU | FRANS DE WIT BV | | | SCAC4 |
| 14 | SDWX | Cemex, Inc. | added 7/2005; 7/2005 | | NAKINA |
| 15 | SDWX | *SOUTHDOWN, INC. | | | PWRC |
| 16 | SDWX | +CEMEX, INC. | | | PWRC |
| 17 | SDWX | CEMEX INC | | | SCAC4 |
| 18 | SDWX | Cemex Inc. | | USA | TRAFFIC |
| 19 | SDWY | SIDDOWAY SHEEP COMPANY INC | | | SCAC4 |
| 20 | SDWZ | SOUTH DAKOTA WHEAT GROWERS | | | PWRC |
