| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Lorenden School 1993 Ltd | 02820013 | 29/07/1993 | Dissolved |
| Medway Automotive Port Services Ltd | 03162048 | 22/09/1997 | Dissolved |
| Port Skills & Safety Ltd | 04346482 | 17/09/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CHECKMATE FLEXIBLE ENGINEERING LIMITED | 06034618 | 26/06/2008 | 25/06/2020 | Gold |
| CHECKMATE SEAENERGY LIMITED | 06337747 | 26/06/2008 | 02/10/2020 | One Red Flag |
| DEMELZA HOSPICE CARE FOR CHILDREN | 02948500 | 10/07/2001 | 22/05/2012 | Silver |
| ESTUARY SERVICES LIMITED | 02262789 | 15/08/1997 | 18/04/2008 | Gold |
| FRESH FRUIT SERVICES LIMITED | 03295734 | 05/08/1997 | 18/04/2008 | Dissolved |
| KENT UNITED CONTRACTORS LIMITED | 02788556 | 22/06/1993 | 15/10/1993 | Dissolved |
| LORENDEN SCHOOL | 03093684 | 22/08/1995 | 14/06/2005 | Dissolved |
| MEDWAY PORTS LIMITED | 02650541 | 16/12/1991 | 26/01/1993 | Bronze |
| NORTHBOURNE PARK SCHOOL LIMITED | 01490100 | 01/01/2011 | 29/05/2012 | Silver |
| PORT OF SHEERNESS LIMITED | 02639118 | 14/08/1992 | 26/01/1993 | Bronze |
| ROYAL BRITISH LEGION INDUSTRIES LTD. | 00158479 | 29/09/2016 | 16/09/2019 | Gold |
| SEAFORTH POWER LIMITED | 02278872 | 23/05/1992 | 26/01/1993 | Bronze |
| SEAFORTH STEVEDORING LIMITED | 01624480 | 09/05/1992 | 26/01/1993 | Not Trading |
| SEAFORTH WINDFARM LIMITED | 02183445 | 12/04/2000 | 07/02/2008 | Bronze |
| SHEERNESS COOL STORES LIMITED | 02497816 | 01/05/1992 | 26/01/1993 | Dissolved |
| SOUTH EAST MEDICAL SERVICES LIMITED | 06042090 | 20/03/2007 | 22/05/2012 | Not Trading |
| THE UNITED KINGDOM MAJOR PORTS GROUP LIMITED | 02787097 | 01/08/2000 | 07/02/2008 | Silver |
| The Mersey Docks & Harbour Co | ZC000189 | 12/02/2002 | 18/04/2008 | Dissolved |
| WAKELEY BROTHERS(RAINHAM,KENT),LIMITED | 00052573 | 24/12/2002 | 31/05/2007 | Silver |