| CVH Investments Limited | Real estate | 2009 |
| Cvlc Limited | Hospitality | 2022 |
| Cvor Limited | Information & communication | 2023 |
| Cvtech Solutions Ltd | Professional & scientific | 2023 |
| Cvyc Limited | Hospitality | 2023 |
| CW 1010 Limited | Real estate | 2020 |
| CW Bespoke Joinery Ltd | Manufacturing | 2022 |
| CW Bilston Management Company Ltd | Households | 2016 |
| CW Lincoln Limited | Wholesale & retail | 2009 |
| CW Marketflow Ltd | Wholesale & retail | 2025 |
| CW Refrigeration (Holdings) Ltd | Construction | 2024 |
| CW Test Services Ltd | Information & communication | 2012 |
| CW Windows and Fascias Limited | Administrative & support | 2002 |
| CW4 Group Ltd | Agriculture & fishing | 2025 |
| CWB Prestige Brickwork Limited | Construction | 2022 |
| Cwcs Managed Hosting Limited | Professional & scientific | 2007 |
| CWE Floorcovering Agencies Limited | Wholesale & retail | 2006 |
| CWP Group Limited | Construction | 2013 |
| CWP Plumbing & Heating Specialists Ltd | Construction | 2017 |
| CWP Property Group Ltd | Real estate | 2025 |
| CWR Advisory Ltd | Professional & scientific | 2025 |
| CWS Beach Ltd | Information & communication | 2025 |
| CWS Herd Ltd | Information & communication | 2025 |
| CWS Ralph Ltd | Financial services | 2025 |
| CWS Rosa Ltd | Information & communication | 2025 |
| CWS Waverunner Ltd | Administrative & support | 2025 |
| Cwsps Limited | Real estate | 2020 |
| Cwtch Developments Ltd | Real estate | 2006 |
| CX NA Ltd | Administrative & support | 2005 |
| CXJ Properties Ltd | Real estate | 2025 |
| CY Power Investment Ltd | Real estate | 2026 |
| Cyber Angkati Limited | Wholesale & retail | 2021 |
| Cyber Monkey Limited | Information & communication | 2015 |
| Cyber Safety Alliance Limited | Information & communication | 2024 |
| Cyber Talent Limited | Administrative & support | 2009 |
| Cyberevolved Technologies Limited | Information & communication | 2025 |
| Cyberpinnacle Limited | Information & communication | 2024 |
| Cybershadows Intel Limited | Information & communication | 2016 |
| Cyberspheres Solutions Limited | Information & communication | 2025 |
| Cybrit Ltd | Information & communication | 2020 |
| Cycad Design Services Limited | Administrative & support | 2010 |
| Cycling GK Limited | Other services | 2020 |
| Cycling GK Studios Limited | Information & communication | 2025 |
| Cycling Solutions Ltd | Administrative & support | 2016 |
| Cyclix Investments Limited | Real estate | 2003 |
| Cyclones Holdings Limited | Financial services | 2025 |
| Cyclones Revolution CIC | Arts & recreation | 2023 |
| Cyclones Revolution Group Limited | Education | 2025 |
| Cyclones Revolution Midlands Limited | Health & social care | 2025 |
| Cyclops Security Sentinel Limited | Manufacturing | 2020 |
| Cycom Solutions Limited | Wholesale & retail | 2018 |
| Cyfran-Abi LLP | | 2008 |
| Cygnet Accounting Limited | Professional & scientific | 2024 |
| Cygnet Court (Holdings) Limited | Real estate | 2020 |
| CYL Flooring Limited | Other services | 2016 |
| Cymbiant Ltd | Information & communication | 2009 |
| Cymek Limited | Professional & scientific | 2007 |
| Cynectics Limited | Information & communication | 2010 |
| Cynergy Engineering Services Ltd | Professional & scientific | 2025 |
| Cyong Investment Ltd | Financial services | 2021 |
| Cypher Street Ltd | Wholesale & retail | 2026 |
| Cypp UK Limited | Transport & logistics | 2018 |
| Cyprus Court Management Company Limited | Households | 1999 |
| Cyprus Lodge Limited | Households | 2001 |
| Cyprus Road Freeholders Limited | Households | 1975 |
| Cyrisk Limited | Information & communication | 2020 |
| Cyrus Mini Market Ltd | Wholesale & retail | 2026 |
| Cyrus Services 84 Ltd | Construction | 2026 |
| Cyrus Solutions Ltd | Information & communication | 2021 |
| Cysan Consulting Ltd | Information & communication | 2021 |
| CZN Xpress Ltd | Hospitality | 2026 |
| D & a Haulage (Ilkeston) Ltd | Transport & logistics | 2002 |
| D & B Building Solutions Ltd | Construction | 2024 |
| D & B W Ltd | Wholesale & retail | 2018 |
| D & D Accountancy Services Limited | Professional & scientific | 2019 |
| D & D Herbert Limited | Health & social care | 2016 |
| D & E Simpson Limited | Real estate | 1977 |
| D & F Beds Ltd | Wholesale & retail | 2024 |
| D & G Beauty Salon Ltd | Other services | 2022 |
| D & J Deaves Limited | Financial services | 2007 |
| D & J Moore Accountancy Limited | Professional & scientific | 2014 |
| D & L (Holdings) Limited | Professional & scientific | 2013 |
| D & L Support Limited | Health & social care | 2006 |
| D & L Supported Living Limited | Health & social care | 2024 |
| D & M Developments (Nottinghamshire) Ltd | Construction | 2024 |
| D & M Electrical Contractors Ltd. | Construction | 2003 |
| D & M Maintenance and Services Limited | Construction | 2014 |
| D & N Smart Repairs Ltd | Wholesale & retail | 2020 |
| D & P Media Limited | Professional & scientific | 2021 |
| D & R Design Consultants Ltd | Construction | 2021 |
| D & R Trade Limited | Wholesale & retail | 2015 |
| D & S Joinery Limited | Construction | 1999 |
| D & S Land Holdings Ltd | Real estate | 2019 |
| D a Beatty Builders Ltd | Construction | 2020 |
| D a G Enterprise Limited | Wholesale & retail | 2021 |
| D a Haulage Longcliffe Limited | Transport & logistics | 2023 |
| D a Owen Financial Services Limited | Financial services | 2005 |
| D a Pritchett Building & Joinery Contractors Ltd | Construction | 2007 |
| D and D Methods Ltd | Information & communication | 2026 |
| D Appleyard Builders Ltd | Construction | 2013 |