| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 3NET LIMITED | 03695014 | 01/12/2014 | Dissolved |
| AH 1 LIMITED | 01699264 | 01/12/2014 | Dissolved |
| AZUR BUSINESS SOLUTIONS LTD. | SC063202 | 01/12/2014 | Dissolved |
| CALTELL COMMUNICATIONS LIMITED | 02795848 | 01/12/2014 | Dissolved |
| CASTLETON BUSINESS SOLUTIONS LIMITED | 05015699 | 01/12/2014 | Dissolved |
| CASTLETON COMMUNICATIONS LIMITED | 02860236 | 01/12/2014 | Dissolved |
| CENTRIC NETWORKS LIMITED | 04758367 | 01/12/2014 | Dissolved |
| COGNITION SOLUTIONS LIMITED | 03382850 | 01/12/2014 | Dissolved |
| COGNITION SUPPORT SERVICES LIMITED | 05487688 | 01/12/2014 | Dissolved |
| COMPASS COMMUNICATIONS TECHNICAL SERVICES LIMITED | 03241445 | 01/12/2014 | Dissolved |
| COMPASS TELECOM LIMITED | 03469994 | 01/12/2014 | Dissolved |
| DIALNET PLC | 02050042 | 01/12/2014 | Dissolved |
| DXI NETWORKS LIMITED | 04275040 | 01/12/2014 | Dissolved |
| ESSENTIAL NETWORK SOLUTIONS LIMITED | 03671417 | 01/12/2014 | Dissolved |
| FASTNET CONSULTING SERVICES LIMITED | 02387293 | 01/12/2014 | Dissolved |
| FASTNET GROUP LIMITED | 03015466 | 01/12/2014 | Dissolved |
| FENFONES COMMUNICATIONS LIMITED | 01239992 | 01/12/2014 | Dissolved |
| FUJIN SYSTEMS LIMITED | 07086609 | 01/12/2014 | Dissolved |
| Fastnet Systems Plc | 03073386 | 01/12/2014 | Dissolved |
| GENESIS TELECOMMUNICATIONS LIMITED | 02569263 | 01/12/2014 | Dissolved |
| IDENTA LIMITED | 03687127 | 01/12/2014 | Dissolved |
| IDN TELECOM LIMITED | 04041485 | 01/12/2014 | Dissolved |
| INDEPENDENT DIGITAL NETWORKS LTD | 03309548 | 01/12/2014 | Dissolved |
| IQGEO GROUP LIMITED | 05589712 | 25/09/2020 | Gold |
| IQGEO SYSTEMS LIMITED | 03639556 | 23/09/2020 | Dissolved |
| IQGEO UK LIMITED | 11559043 | 23/09/2020 | Amber |
| ISOMATRIX UK LIMITED | 03787777 | 01/12/2014 | Dissolved |
| M2 SYSTEMS LIMITED | 03697649 | 01/12/2014 | Dissolved |
| MARCOM COMMUNICATIONS LIMITED | 03311824 | 01/12/2014 | Dissolved |
| MINERVA INDUSTRIAL SYSTEMS LIMITED | 02236830 | 01/12/2014 | Dissolved |
| MONTAL COMPUTER SYSTEMS LIMITED | 02562699 | 17/03/2015 | Dissolved |
| MONTAL GROUP LIMITED | 03344900 | 01/12/2014 | Dissolved |
| NET QUEST SOLUTIONS LIMITED | 04870445 | 01/12/2014 | Dissolved |
| PURE NETWORKS LIMITED | 02927633 | 01/12/2014 | Dissolved |
| REDSTONE TELECOM HOLDINGS LIMITED | 05405982 | 01/12/2014 | Dissolved |
| REDSTONE TELECOMMUNICATIONS LIMITED | 03671458 | 01/12/2014 | Dissolved |
| RINGWOOD GROUP LIMITED | 03705731 | 01/12/2014 | Dissolved |
| RINGWOOD SOFTWARE LIMITED | 02446247 | 01/12/2014 | Dissolved |
| SEVENTHREE LIMITED | 03724757 | 01/12/2014 | Dissolved |
| SYSTEMATIC TELECOMS LIMITED | 02070755 | 01/12/2014 | Dissolved |
| TROVE SOFTWARE LIMITED | 02181987 | 01/12/2014 | Dissolved |
| XPERT COMMUNICATIONS LIMITED | 04147353 | 01/12/2014 | Dissolved |
| XPERT GROUP LIMITED | 04590730 | 01/12/2014 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CASTLETON FINANCIAL MODELLING SOLUTIONS LTD | 04424822 | 31/05/2015 | 04/06/2020 | Dissolved |
| CASTLETON GROUP HOLDINGS LIMITED | 04033327 | 01/12/2014 | 16/06/2020 | Dissolved |
| CASTLETON I4E LIMITED | 03476733 | 01/12/2014 | 04/06/2020 | Dissolved |
| CASTLETON INFORMATION GROUP LIMITED | 02974039 | 01/12/2014 | 04/06/2020 | Dissolved |
| CASTLETON INNOVATION CO LIMITED | 11254667 | 14/03/2018 | 04/06/2020 | Dissolved |
| CASTLETON IP CO LIMITED | 11254673 | 14/03/2018 | 04/06/2020 | Dissolved |
| CASTLETON MANAGED SERVICES LTD | 02167037 | 01/12/2014 | 04/06/2020 | Strike Off |
| CASTLETON SOFTWARE SOLUTIONS LTD | 06185144 | 27/02/2015 | 04/06/2020 | Dissolved |
| CASTLETON TECHNOLOGIES LIMITED | 06193446 | 10/12/2014 | 04/06/2020 | Bronze |
| CASTLETON TECHNOLOGY HOLDINGS LIMITED | 05043538 | 01/12/2014 | 04/06/2020 | Dissolved |
| CASTLETON TECHNOLOGY INTERMEDIATE HOLDING COMPANY LIMITED | 06517747 | 01/12/2014 | 04/06/2020 | Dissolved |
| CASTLETON TECHNOLOGY LIMITED | 03336134 | 01/12/2014 | 04/06/2020 | Gold |
| DEEPLAKE DIGITAL LIMITED | 11624528 | 10/01/2019 | 04/06/2020 | Dissolved |
| HOMETEAM.NET LIMITED | 04980129 | 29/01/2016 | 04/06/2020 | Dissolved |
| IMPACT APPLICATIONS LIMITED | 04048750 | 29/05/2015 | 04/06/2020 | Dissolved |
| KEYLOGIC LTD | 04196183 | 27/02/2015 | 04/06/2020 | Dissolved |
| KYPERA HOLDINGS LIMITED | 06010221 | 29/01/2016 | 04/06/2020 | Dissolved |
| KYPERA LIMITED | 04454748 | 29/01/2016 | 04/06/2020 | Dissolved |
| QED BUSINESS SYSTEMS LIMITED | 03066253 | 01/12/2014 | 10/12/2014 | Dissolved |