| 1 | GRW | Gary Railway Co. | added 4/2009 | | NAKINA |
| 2 | GRW | GREAT WESTERN TOURS | | | PWRC |
| 3 | GRW | GARY RAILWAY COMPANY | | | SCAC4 |
| 4 | GRWA | GREENWAY | | | SCAC4 |
| 5 | GRWB | GREWAL BROTHER INC | | | SCAC4 |
| 6 | GRWC | GROWERS CHEMICAL CORP | | | SCAC4 |
| 7 | GRWE | GRANDVIEW ENTERPRISES INC | | | SCAC4 |
| 8 | GRWH | GRATTON WAREHOUSE COMPANY | | | SCAC4 |
| 9 | GRWI | GILL ROADWAYS INC | | | SCAC4 |
| 10 | GRWK | GROWMARK INC | | | SCAC4 |
| 11 | GRWR | Great Walton R.R. Co. | 1/1994-7/2005 | | NAKINA |
| 12 | GRWR | Great Walton R.R. Co. | 1/94-7/2000 | | NRHS |
| 13 | GRWR | GREAT WALTON RAILROAD CO. | | | PWRC |
| 14 | GRWR | Great Walton Railroad | | | RSRV |
| 15 | GRWR | GREAT WALTON RAILROAD CO, THE | | | SCAC4 |
| 16 | GRWT | GRIMWOOD TRUCKING | | | SCAC4 |
| 17 | GRWU | GRW ENGINEERING (PTY) LTD | | ZA | BIC |
| 18 | GRWY | GREENWAY TRANSPORTATION SERVICES IN | | | SCAC4 |
