| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| FOXGLOVE SOLUTIONS LIMITED | 08520456 | 08/05/2013 | Bronze |
| GOLDIE INVESTMENTS LIMITED | 11220920 | 22/02/2018 | Amber |
| GWM PROPERTIES LTD | 08659487 | 21/08/2013 | Bronze |
| HERCULES BIDCO LIMITED | 13576430 | 08/09/2021 | Silver |
| HERCULES TOPCO LIMITED | 13571802 | 08/09/2021 | Bronze |
| SAINT TOPCO LIMITED | 13567332 | 16/08/2021 | Bronze |
| SOUTHERN COMMUNICATIONS GROUP LIMITED | 10053004 | 11/05/2016 | Amber |
| SOUTHERN COMMUNICATIONS INVESTMENTS LIMITED | 10053141 | 11/05/2016 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BCN TOPCO LIMITED | 11672759 | 27/02/2019 | 18/06/2022 | Amber |
| CPW NETWORK SERVICES LIMITED | 05408812 | 20/09/2010 | 05/02/2013 | Silver |
| DUNSTONE EDUCATION TRUST | 06960253 | 21/08/2009 | 17/11/2015 | Amber |
| ENERGY ASSETS GROUP LIMITED | 07931804 | 08/04/2013 | 05/07/2016 | Bronze |
| EUREXCEL LIMITED | 04371712 | 20/12/2004 | 14/01/2010 | Dissolved |
| GREYSTONE TELECOM LIMITED | 04066365 | 01/10/2011 | 05/07/2013 | Not Trading |
| HEALTH AND SOCIALCARE TECHNOLOGY GROUP LIMITED | 08409270 | 28/08/2015 | 30/11/2017 | Bronze |
| NODE 4 HOLDINGS LIMITED | 08519735 | 24/05/2013 | 04/10/2016 | One Red Flag |
| NODE 4 LIMITED | 04759927 | 24/05/2013 | 04/10/2016 | Gold |
| ONETEL TELECOMMUNICATIONS LIMITED | 04226697 | 20/09/2010 | 03/09/2012 | Not Trading |
| OPAL BUSINESS SOLUTIONS LIMITED | 05990928 | 20/09/2010 | 03/09/2012 | Not Trading |
| OPAL CONNECT LIMITED | 05727462 | 20/09/2010 | 03/09/2012 | Dissolved |
| PIPEX INTERNET LIMITED | 05306519 | 03/07/2009 | 14/12/2012 | Not Trading |
| PIPEX UK LIMITED | 04063120 | 03/07/2009 | 03/09/2012 | Not Trading |
| PLATFORMX COMMUNICATIONS LTD | 03565511 | 20/12/2004 | 01/11/2011 | Not Trading |
| SAINT BIDCO LIMITED | 13569924 | 17/08/2021 | 10/12/2021 | Bronze |
| SOUTHERN COMMUNICATIONS NETWORKS LIMITED | 06925467 | 01/12/2010 | 28/03/2013 | Not Trading |
| STREAM TOPCO LIMITED | 09042710 | 16/09/2014 | 08/02/2018 | Not Trading |
| SWITCH2 TELECOMS LIMITED | 05199682 | 03/07/2009 | 03/02/2010 | Dissolved |
| TALKTALK CORPORATE LIMITED | 06755322 | 03/07/2009 | 27/09/2013 | Silver |
| TALKTALK DIRECT LIMITED | 05303195 | 01/03/2005 | 03/09/2012 | Not Trading |
| TALKTALK GROUP LIMITED | 06534112 | 08/08/2008 | 27/09/2013 | Bronze |
| TALKTALK RB LIMITED | 05200716 | 20/09/2010 | 26/04/2012 | Dissolved |
| TALKTALK TECHNOLOGY LIMITED | 03531818 | 20/12/2004 | 24/02/2012 | Dissolved |
| TALKTALK TELECOM GROUP LIMITED | 07105891 | 20/01/2010 | 27/09/2013 | Bronze |
| TALKTALK TELECOM HOLDINGS LIMITED | 03253714 | 28/07/2005 | 31/07/2008 | Silver |
| TALKTALK TELECOM LIMITED | 04633015 | 20/09/2010 | 27/09/2013 | Bronze |
| TALKTALK UK COMMUNICATION SERVICES LIMITED | 05714293 | 20/09/2010 | 03/09/2012 | Dissolved |
| TELCO GLOBAL LIMITED | 04222886 | 20/09/2010 | 12/09/2012 | Not Trading |
| TISCALI NETWORK DISTRIBUTION LIMITED | 04660774 | 03/07/2009 | 11/10/2010 | Dissolved |
| TISCALI UK LIMITED | 03408171 | 03/07/2009 | 03/09/2012 | Not Trading |
| TOUCAN RESIDENTIAL LIMITED | 04775696 | 03/07/2009 | 03/02/2010 | Dissolved |
| UK TELCO (GB) LIMITED | 04341230 | 02/11/2009 | 03/09/2012 | Not Trading |
| V NETWORKS LIMITED | 05475260 | 20/09/2010 | 03/09/2012 | Not Trading |
| VIDEO NETWORKS LIMITED | 02740910 | 03/07/2009 | 01/11/2011 | Not Trading |
| VIRTUAL1 COMMUNICATIONS LIMITED | 05227052 | 08/04/2011 | 24/01/2013 | Bronze |
| WHP (HOLDINGS) LIMITED | 08444904 | 27/06/2013 | 01/05/2015 | Bronze |