| Construction Machine Sales Limited | Wholesale & retail | 2026 |
| Construction Services North West Ltd | Construction | 2026 |
| Consultada Ltd | Information & communication | 2020 |
| Contemporary Childcare Solutions Ltd | Health & social care | 2025 |
| Continental Concepts Limited | Hospitality | 2024 |
| Convenience Pointe CP Limited | Wholesale & retail | 2018 |
| Convict Clothing Company Limited | Wholesale & retail | 1995 |
| Convict Limited | Professional & scientific | 1997 |
| Cooking Monsters Limited | Hospitality | 2026 |
| Cooleo Hvac Ltd | Construction | 2025 |
| Cooler Runner Ltd | Hospitality | 2025 |
| Cooper Property Limited | Real estate | 2007 |
| Cooper Property Services (UK) Limited | Real estate | 2002 |
| Cooper Property Services Limited | Real estate | 2003 |
| Copenorth Payroll Services Ltd | Professional & scientific | 2003 |
| Copperfield Court Ltd | Administrative & support | 2026 |
| Core & Cacao Ltd | Other services | 2025 |
| Cornforth Holding Limited | Financial services | 2018 |
| Corpfin Management Solutions Ltd | Professional & scientific | 2019 |
| Corporate Management AUL Service Ltd | Households | 2019 |
| Corporation Drinks Limited | Hospitality | 2025 |
| Costel Roscan Ltd | Transport & logistics | 2018 |
| Counter Bury Ltd | Wholesale & retail | 2025 |
| Coven & Court Ltd | Wholesale & retail | 2026 |
| COX Garden Services Ltd | Administrative & support | 2025 |
| CP SPV57 Ltd | Real estate | 2019 |
| Cravon Ltd | Wholesale & retail | 2025 |
| Crazy in Love Designs Home Ltd | Wholesale & retail | 2024 |
| Creations Marketing Ltd | Wholesale & retail | 2026 |
| CRG Developments Ltd | Real estate | 2011 |
| Croft Agencies Ltd | Wholesale & retail | 2025 |
| Crompton Bailey Financial Services Limited | Financial services | 1999 |
| Cross Garage Motors Limited | Manufacturing | 2015 |
| Crosslux Ltd | Wholesale & retail | 2024 |
| Crowhill Shop Limited | Wholesale & retail | 2024 |
| Crownwealth Meds Ltd | Health & social care | 2025 |
| Crowthorne Chemical Consultancy Ltd | Professional & scientific | 2006 |
| Crystal VBA Ltd | Transport & logistics | 2022 |
| CSM Storage UK Limited | Transport & logistics | 2020 |
| CSTAN56 Limited | Professional & scientific | 2017 |
| Cundiff's Glass & Glazing Limited | Manufacturing | 1998 |
| Curry on Business Limited | Professional & scientific | 2012 |
| Curve Skin Studio Ltd | Other services | 2023 |
| Custom Adventures Ltd | Administrative & support | 2026 |
| Cyberquality Ltd | Wholesale & retail | 2023 |
| Cyclops Environmental Solutions Ltd | Administrative & support | 2010 |
| D & M Plumbing & Heating Services Ltd | Construction | 2007 |
| D & N Transport Limited | Transport & logistics | 2001 |
| D D R Floortech Ltd. | Manufacturing | 1997 |
| D G Electrical Services Ltd | Construction | 2021 |
| D J England Ltd | Financial services | 2024 |
| D O'Neill Enterprise Limited | Other services | 2022 |
| D Perry Ltd | Construction | 2023 |
| D R Autobodies Ltd | Wholesale & retail | 2020 |
| D Ryan Floor Coverings Ltd | Construction | 2022 |
| D S Kitchen Ltd | Manufacturing | 2024 |
| D Shaw Limited | Construction | 2019 |
| D W Investments (Holdings) Limited | Real estate | 2015 |
| D&A Bespoke Services and Supplies Limited | Real estate | 2015 |
| D&K Property Enterprises Limited | Real estate | 2020 |
| D&S Rail Ltd | Construction | 2024 |
| D&S Windows Ltd | Construction | 2021 |
| DA Global Solutions Limited | Real estate | 2025 |
| DA Travel Consultants Ltd | Transport & logistics | 2024 |
| DAB Property Solutions and Maintenance Ltd | Construction | 2021 |
| Daek Mini Market Limited | Wholesale & retail | 2024 |
| DAK Homes Limited | Real estate | 2025 |
| Dalia Supermarket Ltd | Wholesale & retail | 2022 |
| Dalicious Rice Box Ltd | Hospitality | 2024 |
| Damask Ventures Ltd | Wholesale & retail | 2026 |
| Damila Limited | Health & social care | 2016 |
| Damp Solutions Surveys Ltd | Construction | 2024 |
| Damp Solutions UK Limited | Construction | 2021 |
| Danfe Group Ltd | Administrative & support | 2020 |
| Daniel Hopkinson Architectural Photography Ltd | Arts & recreation | 2005 |
| Danny Delivery Services Ltd | Transport & logistics | 2020 |
| Dark Peak Holdings Limited | Real estate | 2022 |
| Darren Arthur Gibson Ltd | Construction | 2021 |
| Databits Tech Solutions Limited | Information & communication | 2024 |
| Datum SJB Ltd | Administrative & support | 2022 |
| David Lawton Light Haulage Limited | Transport & logistics | 2022 |
| David Vick Limited | Construction | 2012 |
| DB Admin Limited | Administrative & support | 2017 |
| DB Building & Joinery (NW) Limited | Construction | 2024 |
| DB Tattoo Studios Ltd | Arts & recreation | 2024 |
| DB Tattoo Worldwide Ltd | Arts & recreation | 2024 |
| DB Web Designs Limited | Information & communication | 2024 |
| DBX Logistic Solutions Ltd | Transport & logistics | 2026 |
| DCD Complete Solution Ltd | Other services | 2022 |
| DCN Corporation Limited | Professional & scientific | 2009 |
| DCS Compliance Training Ltd | Education | 2026 |
| DD Secure Ltd | Professional & scientific | 2017 |
| DE Brook Services Ltd | Professional & scientific | 2015 |
| DE Fayaar Limited | Information & communication | 2022 |
| Deals Factory Limited | Wholesale & retail | 2025 |
| DEC Sweeney Tattoo Ltd | Arts & recreation | 2023 |
| Deepak's Convenience Stores Limited | Wholesale & retail | 2008 |
| Defender Security Ltd | Administrative & support | 2024 |
| Dekko Group Limited | Financial services | 2020 |
| Dekko Window Systems Limited | Manufacturing | 2007 |