| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CASTLE OFFSHORE LIMITED | 07627717 | 10/05/2011 | Dissolved |
| DALBY OFFSHORE SERVICES LIMITED | 06356295 | 30/08/2007 | Insolvent |
| DALBY PORT SERVICES LIMITED | 09466477 | 03/03/2015 | Silver |
| DALBY RENEWABLES LIMITED | 06446905 | 06/12/2007 | Dissolved |
| HARDWICK VENTURES LIMITED | 06574425 | 23/04/2008 | Silver |
| HAYBURN WYKE LIMITED | 04792566 | 09/06/2003 | Silver |
| Hayburn Wyke Ltd | 03857895 | 12/10/1999 | Dissolved |
| Hayburn Wyke Ltd | 03857895 | 12/10/1999 | Dissolved |
| WAVEMASTER (TGOF) LIMITED | 07538794 | 22/02/2011 | Dissolved |
| WHITBY MARINE SERVICES LIMITED | 07197461 | 22/03/2010 | Dissolved |
| WHITBY WINDFARM SERVICES LIMITED | 07197491 | 22/03/2010 | Dissolved |
| Wijsmuller Bros (U K) Ltd | 01249299 | 16/10/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DEEP SEA AND COASTAL PILOTS LIMITED | 02754109 | 16/10/2002 | 03/09/2003 | Gold |
| FUGRO SL LIMITED | 02241479 | 19/06/2002 | 11/07/2003 | Dissolved |
| SERA ENDEAVOURS LTD | 11777272 | 21/01/2019 | 09/09/2021 | Dissolved |
| SVITZER HOLDING UK LIMITED | 03897560 | 03/12/2002 | 01/12/2006 | Dissolved |
| SVITZER MARINE LIMITED | 00069494 | 04/07/2002 | 01/12/2006 | Gold |
| TRINITY MARINE SERVICES LIMITED | 08003214 | 29/01/2016 | 01/10/2018 | Dissolved |
| TYNE TOWAGE MARINE LIMITED | SC002997 | 30/07/2004 | 01/12/2006 | Dissolved |
| WELMC LIMITED | 05352211 | 03/02/2005 | 11/07/2014 | Amber |
| WELMC LIMITED | 05352211 | 03/02/2005 | 11/07/2014 | Amber |