| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ACADEMEE LIMITED | 04735678 | 01/05/2008 | Dissolved |
| Ellis Hayward Consulting Ltd | 03935035 | 01/05/2008 | Dissolved |
| Informed Sources Holdings Ltd | 03936171 | 31/10/2006 | Dissolved |
| NERA UK LIMITED | 03974527 | 21/08/2013 | Silver |
| OLIVER WYMAN CONSULTING LIMITED | 02669796 | 31/10/2006 | Dissolved |
| OLIVER WYMAN DELTA LIMITED | 04320653 | 01/05/2008 | Dissolved |
| OLIVER WYMAN LEADERSHIP DEVELOPMENT LIMITED | 02813374 | 01/05/2008 | Dissolved |
| OLIVER WYMAN LIMITED | 02995605 | 31/10/2006 | Silver |
| OLIVER WYMAN SERVICES LIMITED | 03023304 | 01/03/2014 | Gold |
| Starpart Ltd | 03965605 | 01/05/2008 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DRAW CONNECT LIMITED | 09254270 | 01/01/2018 | 27/01/2020 | Dissolved |
| DRAW CREATE LIMITED | 04943890 | 01/01/2018 | 27/01/2020 | Dissolved |
| DRAW GROUP LONDON LIMITED | 08662551 | 01/01/2018 | 27/01/2020 | Dissolved |
| MMOW LIMITED | 04688518 | 31/10/2006 | 16/08/2024 | Gold |
| OLIVER WYMAN ENERGY CONSULTING LIMITED | 03752224 | 01/08/2013 | 16/08/2024 | Bronze |
| OLIVER WYMAN ENERGY GROUP LIMITED | 03752321 | 01/08/2013 | 10/10/2019 | Dissolved |
| OLIVER WYMAN ENERGY HOLDINGS LIMITED | 05772500 | 01/08/2013 | 10/10/2019 | Dissolved |
| OLIVER WYMAN ENERGY US LIMITED | 05174160 | 01/08/2013 | 10/10/2019 | Dissolved |