| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AMIANTO LIMITED | 08634297 | 01/08/2013 | Dissolved |
| ENERGY FROM WASTE (UK) LIMITED | 07949716 | 14/02/2012 | Dissolved |
| QUALSURV COMMUNICATION TECHNOLOGY LIMITED | 07094886 | 03/12/2009 | Dissolved |
| QUALSURV CONSULTING LIMITED | 05819707 | 17/05/2006 | Dissolved |
| QUALSURV ENVIRONMENTAL SOLUTIONS LIMITED | 05025069 | 16/08/2005 | Dissolved |
| QUALSURV HOLDINGS LIMITED | 09086298 | 16/06/2014 | Bronze |
| QUALSURV INTERNATIONAL LIMITED | 04473681 | 07/10/2008 | Gold |
| QUALSURV MARINE CONSULTING LIMITED | 07225092 | 15/04/2010 | Gold |
| QUALSURV PROJECT SERVICES LIMITED | 06619889 | 13/06/2008 | Dissolved |
| QUALSURV PROPERTY LIMITED | 05675390 | 14/01/2006 | One Red Flag |
| TRISHARE HOLDINGS LIMITED | 13099741 | 24/12/2020 | Bronze |
| UK CONSTRUCTION LINK LIMITED | 07225223 | 18/11/2011 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AVANTI GROUP LIMITED | 09142333 | 22/07/2014 | 25/06/2020 | Three Red Flags (Highest) |
| QUALSURV ENVIRONMENTAL SOLUTIONS LIMITED | 05025069 | 11/04/2007 | 30/07/2009 | Dissolved |
| QUANTUM INTERNATIONAL CONSULTING LIMITED | 02829015 | 14/05/2001 | 30/09/2005 | Bronze |
| SDW PROPERTY SERVICES LTD | 10758724 | 08/05/2017 | 11/02/2022 | Bronze |
| Specialisedcomputersystems.Com Ltd | 04285818 | 06/04/2009 | 08/12/2009 | Dissolved |
| TUNGSTEN CAPITAL HOLDINGS LIMITED | 03396966 | 07/10/2002 | 08/12/2005 | Amber |