| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CALL CONNECTIONS LIMITED | 02712995 | 30/04/2014 | Dissolved |
| CELLPHONES DIRECT (INVESTMENTS) LIMITED | 03066790 | 30/04/2014 | Dissolved |
| CELLPHONES DIRECT LIMITED | 02995222 | 30/04/2014 | Dissolved |
| Cellphones Direct (Holdings) Ltd | 03065866 | 30/04/2014 | Dissolved |
| DX COMMUNICATIONS (EDINBURGH) LIMITED | SC144905 | 30/04/2014 | Dissolved |
| GENIE INTERNET LIMITED | 04330446 | 30/04/2014 | Dissolved |
| LINK FS LIMITED | 03357545 | 30/04/2014 | Dissolved |
| LUMINA HOLDINGS LIMITED | 02667014 | 30/04/2014 | Dissolved |
| MOVISTAR LIMITED | 04101371 | 30/04/2014 | Dissolved |
| O2 (ONLINE) LIMITED | 01906156 | 30/04/2014 | Dissolved |
| O2 CREDIT VOUCHERS LIMITED | 04273243 | 30/04/2014 | Dissolved |
| O2 LIMITED | 04330445 | 30/04/2014 | Dissolved |
| O2 MOBILES LIMITED | 02604355 | 30/04/2014 | Dissolved |
| O2 SOLUTIONS LIMITED | 01814089 | 30/04/2014 | Dissolved |
| O2 THIRD GENERATION | 03900219 | 30/04/2014 | Dissolved |
| O2 TRANSACTIONS LIMITED | 02713001 | 30/04/2014 | Dissolved |
| PACIFIC SHELF 873 LIMITED | SC198346 | 30/04/2014 | Dissolved |
| TELEFONICA FINANCIAL SERVICES UK LIMITED | 07584114 | 23/07/2014 | Dissolved |
| TELEFONICA GLOBAL RESOURCES LIMITED | 02664011 | 30/04/2014 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CELLULAR RADIO LIMITED | 01612599 | 30/04/2014 | 22/06/2021 | Amber |
| CORNERSTONE TELECOMMUNICATIONS INFRASTRUCTURE LIMITED | 08087551 | 17/10/2012 | 24/08/2016 | Bronze |
| DX COMMUNICATIONS LIMITED | SC133682 | 30/04/2014 | 22/06/2021 | Amber |
| GIFFGAFF LIMITED | 04196996 | 13/11/2013 | 21/06/2021 | Gold |
| MMO2 LIMITED | 04190833 | 29/03/2018 | 17/06/2021 | Not Trading |
| O2 (UK) LIMITED | 02012647 | 30/04/2014 | 18/06/2021 | Not Trading |
| O2 COMMUNICATIONS LIMITED | 04271548 | 30/04/2014 | 22/06/2021 | Amber |
| O2 HOLDINGS LIMITED | 02604354 | 29/03/2018 | 17/06/2021 | Bronze |
| O2 OAK LIMITED | 03646040 | 30/04/2014 | 17/06/2021 | Not Trading |
| O2 PINE LIMITED | 06281240 | 30/04/2014 | 18/06/2021 | Not Trading |
| O2 REDWOOD LIMITED | 02383186 | 30/04/2014 | 22/06/2021 | Amber |
| O2 UNIFY LIMITED | 07999361 | 15/11/2013 | 21/06/2021 | Gold |
| O2 WILLOW LIMITED | 06281241 | 30/04/2014 | 18/06/2021 | Not Trading |
| TELEFONICA CYBERSECURITY TECH UK LIMITED | 12490724 | 02/03/2020 | 21/06/2021 | Amber |
| TELEFONICA O2 HOLDINGS LIMITED | 05310128 | 30/09/2016 | 17/06/2021 | Silver |
| TELEFONICA O2 UK LIMITED | 04330394 | 30/04/2014 | 18/06/2021 | Not Trading |
| TELEFONICA UK HOLDINGS LIMITED | 03722259 | 30/04/2014 | 18/06/2021 | Not Trading |
| TELEFONICA UK LIMITED | 01743099 | 03/01/2012 | 01/06/2021 | Gold |
| TESCO MOBILE LIMITED | 04780736 | 06/01/2012 | 17/06/2021 | Bronze |
| THE LINK STORES LIMITED | 03317483 | 30/04/2014 | 18/06/2021 | Not Trading |
| THE MOBILE PHONE STORE LIMITED | 02837875 | 30/04/2014 | 18/06/2021 | Amber |
| WEVE LIMITED | 08178832 | 01/05/2015 | 17/06/2021 | Silver |