| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| QUARTO GROUP INC(THE) | FC013814 | 01/06/2022 | Dissolved |
| QUARTO PUBLISHING PLC | 01252863 | 14/07/2023 | One Red Flag |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CONRAN OCTOPUS LIMITED | 01739383 | 06/07/2005 | 05/10/2020 | Dissolved |
| DIGITAL OCTOPUS LIMITED | 04220493 | 06/07/2005 | 05/10/2020 | Dissolved |
| DIGITAL PROPERTY GUIDES LIMITED | 04220495 | 06/07/2005 | 05/10/2020 | Dissolved |
| FBB1 LIMITED | 00353434 | 06/07/2005 | 05/10/2020 | Dissolved |
| HACHETTE UK (HOLDINGS) LIMITED | 03701589 | 21/06/2005 | 13/06/2007 | Gold |
| HAMLYN PUBLISHING GROUP LIMITED(THE) | 00521989 | 06/07/2005 | 05/10/2020 | Dissolved |
| KYLE BOOKS LIMITED | 07594515 | 03/10/2017 | 05/10/2020 | Dissolved |
| KYLE CATHIE LIMITED | 02427215 | 03/10/2017 | 05/10/2020 | Dissolved |
| LONDON PROPERTY GUIDE LIMITED | 04240399 | 06/07/2005 | 05/10/2020 | Dissolved |
| MAP PRODUCTIONS LIMITED | 00832609 | 06/07/2005 | 05/10/2020 | Dissolved |
| MILLERS PUBLICATIONS LIMITED | 01527729 | 06/07/2005 | 05/10/2020 | Dissolved |
| MITCHELL BEAZLEY INTERNATIONAL LIMITED | 00957334 | 06/07/2005 | 05/10/2020 | Dissolved |
| MITCHELL BEAZLEY LIMITED | 03611943 | 06/07/2005 | 05/10/2020 | Dissolved |
| OCTOPUS BOOKS LIMITED | 01400692 | 06/07/2005 | 05/10/2020 | Dissolved |
| OCTOPUS PUBLISHING GROUP LIMITED | 03597451 | 06/07/2005 | 05/10/2020 | Silver |
| SHORT BOOKS LIMITED | 03676036 | 31/05/2019 | 05/10/2020 | Amber |
| SPRING BOOKS LIMITED | 01249958 | 06/07/2005 | 05/10/2020 | Dissolved |
| SUMMERSDALE PUBLISHERS LIMITED | 03419533 | 05/10/2020 | 31/12/2020 | Silver |
| TLF LIMITED | 00549985 | 06/07/2005 | 05/09/2020 | Dissolved |