| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Circulation Research Ltd | 02456892 | 02/01/1992 | Dissolved |
| Commedica Ltd | 03722626 | 06/12/1999 | Dissolved |
| SYNBIOTEK HOLDINGS LIMITED | 13123963 | 11/01/2021 | Dissolved |
| SYNBIOVEN LIMITED | 13929576 | 21/02/2022 | One Red Flag |
| Serpentine Publishing Ltd | 03219987 | 03/07/1996 | Dissolved |
| St. Mary's Regional Imaging Plc | 02413452 | 15/08/1992 | Dissolved |
| Windsor Regional Imaging Plc | 02463731 | 26/01/1993 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CITY & GUILDS COLLEGE ASSOCIATION LIMITED | 11735499 | 19/12/2018 | 01/09/2022 | Silver |
| Jomed Imaging Ltd | 02144826 | 23/02/1992 | 31/05/1994 | Dissolved |
| LABGENIUS LIMITED | 08183505 | 07/01/2013 | 23/08/2017 | One Red Flag |
| VISBION LTD | 05731554 | 24/03/2006 | 08/12/2021 | One Red Flag |