| CMC Goodies Limited | Financial services | 2010 |
| CMC Healthcare Consultancy Limited | Health & social care | 2023 |
| CMC Histopathology Limited | Health & social care | 2021 |
| CMC Jewellery Ltd | Wholesale & retail | 2023 |
| CMC Legal Ltd | Professional & scientific | 2021 |
| CMC Manchester Ltd | Hospitality | 2026 |
| CMC Radiology Ltd | Health & social care | 2023 |
| Cmcc Electrical Ltd | Construction | 2023 |
| Cmdatl Ltd | Construction | 2025 |
| Cmdb Services Limited | Information & communication | 2008 |
| CME Construction (MCR) Limited | Construction | 2023 |
| CME Properties Limited | Real estate | 2023 |
| CMF Compliance Limited | Professional & scientific | 2011 |
| Cmg’S Properties Limited | Real estate | 2024 |
| CMH Control Ltd | Professional & scientific | 2017 |
| CMH Vehicle Sales & Hire Limited | Wholesale & retail | 2003 |
| CMI Training & Consultancy Ltd | Administrative & support | 2016 |
| Cmid Ltd | Construction | 2015 |
| Cmig Ltd | Arts & recreation | 2016 |
| Cmiwellness Limited | Health & social care | 2025 |
| CMJ Contractors Limited | Construction | 2018 |
| CMJ the Complete Fitout Company Limited | Construction | 2012 |
| Cmkj Ltd | Professional & scientific | 2022 |
| CML Recovery.Carsales Ltd | Transport & logistics | 2025 |
| CMM Anaesthesia Ltd | Health & social care | 2012 |
| CMM Talent Ltd | Administrative & support | 2021 |
| CMO Plastering Ltd | Financial services | 2025 |
| CMP Civils Limited | Construction | 2019 |
| CMP Medical Limited | Health & social care | 2021 |
| CMP Quantity Surveying & Estimating Ltd | Professional & scientific | 2023 |
| CMP Thames Limited | Administrative & support | 1999 |
| Cmpb Solutions Ltd | Information & communication | 2024 |
| Cmpofu Ltd | Health & social care | 2021 |
| CMR Developments UK Ltd | Construction | 2024 |
| CMS (EOT) Limited | Administrative & support | 2020 |
| CMS Business Development Limited | Professional & scientific | 2007 |
| CMS GAS Services (MCR) Limited | Construction | 2024 |
| CMS Group Holdings Ltd | Financial services | 2018 |
| CMS Payments Intelligence Limited | Professional & scientific | 2011 |
| CMS Plumbing & Heating (MCR) Ltd | Wholesale & retail | 2021 |
| Cmsg Services Limited | Professional & scientific | 2018 |
| Cmsm Utilities Limited | Construction | 2023 |
| Cmsnet Limited | Administrative & support | 2015 |
| Cmspi Bidco Limited | Financial services | 2021 |
| Cmspi Midco 1 Limited | Financial services | 2021 |
| Cmspi Midco 2 Limited | Financial services | 2021 |
| Cmspi Topco Limited | Financial services | 2021 |
| CMT Group Ltd | Real estate | 2019 |
| CMT Security Ltd | Construction | 2024 |
| CMT Training and Fitness Ltd | Arts & recreation | 2026 |
| CMV Aviation Ltd | Manufacturing | 2025 |
| Cmyk Computers Limited | Other services | 1996 |
| CN Assured Ltd | Households | 2022 |
| CN Commerce Group Ltd | Wholesale & retail | 2025 |
| CN Joinery and Shopfitting Limited | Construction | 2022 |
| CN Material Solution Ltd | Extraterritorial | 2011 |
| CN Music Limited | Information & communication | 2026 |
| Cn.Gtcc Limited | Information & communication | 2020 |
| Cn.Jwm Limited | Information & communication | 2020 |
| CNA & Co Accountants Ltd | Professional & scientific | 2019 |
| CNA Stores Ltd | Wholesale & retail | 2020 |
| Cnad Ltd | Information & communication | 2024 |
| CNB MCR Ltd | Hospitality | 2025 |
| CNC Ltd | Construction | 2022 |
| CNC P M Ltd. | Real estate | 2020 |
| Cnccpc Ltd | Arts & recreation | 2026 |
| CNG Capital Ltd | Other services | 2024 |
| Cnnctd Community Ltd | Education | 2025 |
| CNQ Ltd | Hospitality | 2018 |
| CNR Property Management Ltd | Real estate | 2021 |
| CNU Services Ltd | Health & social care | 2020 |
| Co Exec Transfer Ltd | Transport & logistics | 2025 |
| Co Media Limited | Information & communication | 2024 |
| Co&Co Marketing Ltd | Professional & scientific | 2020 |
| Co-Gency Corporate Finance Limited | Professional & scientific | 2015 |
| Co-Lab Ltd | Professional & scientific | 2024 |
| Co-Living Club Ltd | Real estate | 2023 |
| Co-Op Phones Ltd | Wholesale & retail | 2024 |
| Co-Operative Bank Financial Advisers Limited | Administrative & support | 1962 |
| Co-Operative Brands Limited | Professional & scientific | 2004 |
| Co-Operative Community Investment Foundation | Administrative & support | 2000 |
| Co-Operative Group Pension Fund Trustees Limited | Administrative & support | 1997 |
| Co-Operative Housing International Limited | Other services | 2025 |
| Co-Operative Legal Services Limited | Professional & scientific | 2006 |
| Co-Shipping Limited | Wholesale & retail | 2025 |
| Co-Workshop Ltd | Professional & scientific | 2016 |
| CO2 Laser Repairs Limited | Manufacturing | 2020 |
| Coab Limited | Health & social care | 2011 |
| Coach AID Ltd | Manufacturing | 2004 |
| Coach Complete Ltd | Information & communication | 2025 |
| Coach Hene Sports Consult Limited | Arts & recreation | 2020 |
| Coach Hire Rental Ltd | Transport & logistics | 2023 |
| Coach MEL Ltd | Professional & scientific | 2014 |
| Coach Right UK Limited | Arts & recreation | 2015 |
| Coached by Marcus Ltd | Arts & recreation | 2024 |
| Coached by Mike Westwood Ltd | Education | 2024 |
| Coachedbygianni Ltd | Education | 2025 |
| Coachella Properties Limited | Real estate | 2026 |
| Coaching by Sally Ltd. | Professional & scientific | 2020 |
| Coaching Connexions Ltd | Arts & recreation | 2010 |