| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Alexandra Marine Transportation Ltd | 00498855 | 24/06/1994 | Dissolved |
| Bulk Cargo Handling Services Ltd | 00987740 | 24/06/1994 | Dissolved |
| Mintshore Ltd | 02252545 | 08/05/1991 | Dissolved |
| Offen Ltd | 00341890 | 19/09/1991 | Dissolved |
| Smith,Howard,(Felixstowe) Ltd | 00427497 | 26/07/1994 | Dissolved |
| Smith,Howard,(London) Ltd | 00146977 | 26/07/1994 | Dissolved |
| The Medway Dry Dock & Engineering Co Ltd | 00672470 | 26/07/1994 | Dissolved |
| United Salvage Ltd | 01100719 | 26/07/1994 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Alexandra-Molyneux Haulage Ltd | 01924616 | 22/12/1993 | 07/01/1994 | Dissolved |
| DOVE HOUSE HOSPICE LIMITED | 01498747 | 30/04/2007 | 01/09/2010 | Gold |
| Dilmun Navigation Co Ltd | 02103678 | 08/05/1991 | 07/06/1996 | Dissolved |
| Dilmun Navigation Co Ltd | 02103678 | 29/07/1994 | 07/06/1996 | Dissolved |
| EUROAIR TRANSPORT LIMITED | 00583173 | 26/07/1994 | 23/02/1995 | Gold |
| FELIXARC MARINE LIMITED | 04094541 | 25/05/2001 | 26/03/2007 | Bronze |
| GOOD TRAVEL LIMITED | 01607126 | 17/03/2008 | 05/08/2015 | Dissolved |
| HUMBER SEAFARERS' SERVICE TRADING LIMITED | 09164436 | 31/03/2015 | 23/08/2019 | Not Trading |
| HUMBER TUGS LIMITED | 03124502 | 12/02/1996 | 31/03/2007 | Dissolved |
| Haven Tugs Ltd | 05816855 | 17/05/2006 | 31/03/2007 | Dissolved |
| JOHN GOOD & SONS LIMITED | 00096398 | 17/03/2008 | 01/06/2015 | Gold |
| Medway Tugs Ltd | 05742191 | 17/05/2006 | 31/03/2007 | Dissolved |
| Mersey Tugs Ltd | 05742381 | 17/05/2006 | 31/03/2007 | Dissolved |
| ROYAL TERRACE PIER ESTATE COMPANY,LIMITED(THE) | 00039148 | 26/07/1994 | 31/03/2007 | Dissolved |
| SVITZER EASTLANDS LIMITED | 02103679 | 08/05/1991 | 21/10/1998 | Dissolved |
| SVITZER EASTLANDS LIMITED | 02103679 | 24/08/1994 | 31/03/2007 | Dissolved |
| SVITZER HUMBER LIMITED | 00524008 | 02/08/1994 | 31/03/2007 | Dissolved |
| SVITZER SPC4 LIMITED | 05472015 | 07/06/2005 | 31/03/2007 | Dissolved |
| SVITZER TOWAGE LIMITED | 00024907 | 02/03/1993 | 31/03/2007 | Dissolved |
| SVITZER TUGMENS TRUSTEES LIMITED | 02918341 | 27/10/1998 | 31/03/2007 | Dissolved |
| Solent Tugs Ltd | 05742193 | 17/05/2006 | 31/03/2007 | Dissolved |
| Svitzer Personnel Services Ltd | 04563569 | 07/01/2003 | 31/03/2007 | Dissolved |
| Svitzer SPC3 Ltd | 04625083 | 21/03/2003 | 31/03/2007 | Dissolved |
| Svitzer Towage (Southampton) Ltd | 04136963 | 28/03/2002 | 31/03/2007 | Dissolved |
| Thames Tugs Ltd | 05816856 | 17/05/2006 | 31/03/2007 | Dissolved |
| The Alexandra Towing Co Ltd | 01313397 | 24/06/1994 | 31/03/2007 | Dissolved |
| UNITED SALVAGE LIMITED | 00229347 | 31/03/1992 | 28/08/1993 | Dissolved |
| UNITED SALVAGE LIMITED | 00229347 | 02/08/1994 | 31/03/2007 | Dissolved |
| UNITED TOWING LIMITED | 00172316 | 13/12/1993 | 31/03/2007 | Dissolved |
| United Salvage Ltd | 01100719 | 31/03/1992 | 28/08/1993 | Dissolved |