Workspace Group PLC is the holding company for subsidiary companies in the Workspace Group. Some of these subsidiaries are either the legal owners of Workspace properties used by our customers and/or contract directly with customers, employees and our suppliers of other services. Details of the Workspace subsidiary companies that are Data Controllers with a separate registration with the UK Information Commissions office and their registration number can be found here:
| Name of Workspace Company | Registered Company Number | ICO Registration Number |
| Workspace Management Limited | 02841232 | Z4990708 |
| LI Property Services Limited | 02134039 | Z6142048 |
| Workspace 12 Limited | 05764838 | Z9551883 |
| Workspace 13 Limited | 05834824 | Z9552003 |
| Workspace 14 Limited | 05834831 | Z9552600 |
| Workspace Projects (KP) Limited | 14186009 | A1113179 |
| Busworks Limited | 04108036 | A1113180 |
| Omnibus Workspace Limited | 01444827 | Z8522574 |
| United Workspace Limited | 01749661 | Z9457048 |
| McKay Securities Limited | 00421479 | Z6539279 |
| Baldwin House Limited | 00692181 | A1113181 |
| Workspace Holdings Limited | 03729646 | Z6141974 |
| Workspace 1 Limited | 03726272 | ZB107975 |
| Workspace 10 Limited | 02985018 | ZB107976 |