| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| HUMBER TUGS LIMITED | 03124502 | 01/06/2009 | Dissolved |
| SVITZER CREW SERVICES LIMITED | 00185144 | 01/06/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ESVAGT HOLDINGS LIMITED | 05378041 | 05/11/2010 | 29/10/2012 | Gold |
| ESVAGT UK LIMITED | 05661200 | 05/11/2010 | 29/10/2012 | Bronze |
| FELIXARC MARINE LIMITED | 04094541 | 01/06/2009 | 17/02/2012 | Bronze |
| MAERSK COMPANY LIMITED(THE) | 00493147 | 01/01/2011 | 15/07/2011 | Amber |
| MAERSK LINE UK LIMITED | 00857789 | 01/01/2011 | 15/07/2011 | Silver |
| ROYAL TERRACE PIER ESTATE COMPANY,LIMITED(THE) | 00039148 | 01/06/2009 | 17/02/2012 | Dissolved |
| SVITZER EASTLANDS LIMITED | 02103679 | 01/06/2009 | 17/02/2012 | Dissolved |
| SVITZER HOLDING UK LIMITED | 03897560 | 01/06/2009 | 17/02/2012 | Dissolved |
| SVITZER HUMBER LIMITED | 00524008 | 01/06/2009 | 17/02/2012 | Dissolved |
| SVITZER MARINE LIMITED | 00069494 | 01/06/2009 | 17/02/2012 | Silver |
| SVITZER SPC4 LIMITED | 05472015 | 01/06/2009 | 17/02/2012 | Dissolved |
| SVITZER TOWAGE LIMITED | 00024907 | 01/06/2009 | 17/02/2012 | Dissolved |
| THE CHAMBER OF SHIPPING LIMITED | 02107383 | 07/12/2010 | 18/07/2011 | Silver |
| TYNE TOWAGE MARINE LIMITED | SC002997 | 01/06/2009 | 17/02/2012 | Dissolved |
| UNITED SALVAGE LIMITED | 00229347 | 01/06/2009 | 26/10/2011 | Dissolved |
| UNITED TOWING LIMITED | 00172316 | 01/06/2009 | 17/02/2012 | Dissolved |