| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Francis Marine Engineering Ltd | 01983894 | 30/09/1992 | Dissolved |
| Francis Marine Engineering Ltd | 01983894 | 30/09/1992 | Dissolved |
| SEAWAY POWELL (IMH) LIMITED | 05624751 | 06/04/2007 | Dissolved |
| SEAWAY POWELL LIMITED | 02980992 | 23/02/1995 | Dissolved |
| Seaway Francis Ltd | 02738175 | 07/08/1992 | Dissolved |
| Seaway Industrial Limited | 01999919 | 30/12/1992 | Dissolved |
| Seaway Manufacturing Ltd | 02459037 | 12/01/1992 | Dissolved |
| Seaway Products Ltd | 01116174 | 31/01/1991 | Dissolved |
| Seaway Thrusters Limited | 02617012 | 04/06/1991 | Dissolved |
| The Seaway Group Ltd | 01999742 | 07/03/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Haymarch Engineering Services Ltd | 04734166 | 15/04/2003 | 20/01/2006 | Dissolved |
| SOUTH WEST MAIN LINE STEAM COMPANY | 02929246 | 18/06/2013 | 05/08/2014 | Bronze |