| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ABERTIS OVERSEAS UK LIMITED | 08846932 | 15/01/2014 | Dissolved |
| AIRPORT CONCESSIONS AND DEVELOPMENT LIMITED | 05276530 | 10/02/2015 | Dissolved |
| LLAG INVESTORS (UK) LIMITED | 03546978 | 27/08/2008 | Dissolved |
| MB121 LIMITED | 03440896 | 27/08/2008 | Dissolved |
| ONE ELLERDALE ROAD LIMITED | 05313727 | 14/07/2010 | Bronze |
| SGL RESERVE LIMITED | 09777765 | 15/09/2015 | Dissolved |
| TBI (US) HOLDINGS LIMITED | 03338988 | 27/08/2008 | Dissolved |
| TBI AIRPORT HOLDINGS LIMITED | 03023367 | 09/02/2015 | Dissolved |
| TBI AVIATION LIMITED | 03276152 | 27/08/2008 | Dissolved |
| TBI FINANCE LIMITED | 02868670 | 27/08/2008 | Dissolved |
| TBI FINANCIAL INVESTMENTS LIMITED | SC237380 | 27/10/2008 | Dissolved |
| TBI INTERNATIONAL AIRPORTS LIMITED | 03691837 | 27/08/2008 | Dissolved |
| Tbi (Global) Ltd | 03068039 | 27/08/2008 | Dissolved |
| Tbi Global (Business Travel) Ltd | 03068042 | 27/08/2008 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CELLNEX CONNECTIVITY SOLUTIONS LIMITED | 04134381 | 18/10/2016 | 27/09/2019 | Bronze |
| CELLNEX UK CONSULTING LIMITED | 05153762 | 18/10/2016 | 27/09/2019 | Silver |
| CELLNEX UK LIMITED | 05153745 | 11/10/2016 | 27/09/2019 | Amber |
| CELLNEX UK MIDCO LIMITED | 06548829 | 18/10/2016 | 27/09/2019 | Bronze |
| INFRASTRUCTURE INVESTMENTS ROADS MANAGEMENT LIMITED | 03046316 | 20/12/2013 | 12/01/2016 | Silver |
| QS4 HOLDINGS LIMITED | 04127035 | 18/10/2016 | 27/09/2019 | Not Trading |
| RADIOSITE LIMITED | 05232914 | 18/10/2016 | 27/09/2019 | Silver |
| ROAD MANAGEMENT CONSOLIDATED PLC | 03070488 | 23/09/2013 | 22/04/2015 | Silver |
| ROAD MANAGEMENT GROUP LIMITED | 02804119 | 23/09/2013 | 22/04/2015 | Silver |
| ROAD MANAGEMENT LIMITED | 02804114 | 23/09/2013 | 22/04/2015 | Amber |
| ROAD MANAGEMENT SERVICES (GLOUCESTER) LIMITED | 03044569 | 23/09/2013 | 22/04/2015 | Silver |
| ROAD MANAGEMENT SERVICES (PETERBOROUGH) LIMITED | 02804122 | 23/09/2013 | 22/04/2015 | Silver |
| SOB (GLOUCESTER) LIMITED | 03162578 | 23/09/2013 | 22/04/2015 | Dissolved |
| SOB (PETERBOROUGH) LIMITED | 03164062 | 23/09/2013 | 22/04/2015 | Dissolved |
| TBI LIMITED | 01064763 | 10/11/2010 | 15/02/2011 | Dissolved |
| THE ORTHOPAEDIC RESEARCH AND EDUCATION FOUNDATION | 05107911 | 20/04/2015 | 26/07/2024 | Silver |
| WATERSITE LIMITED | 06529753 | 18/10/2016 | 27/09/2019 | Silver |