| CT Fitness Limited | Health & social care | 2022 |
| CT Holiday Lets Ltd | Hospitality | 2023 |
| CT Lettings Limited | Real estate | 2013 |
| CT Lining Limited | Construction | 2018 |
| CT Mckenna. Ltd | Other services | 2019 |
| CTA Systems I.T. Solutions Ltd | Information & communication | 2021 |
| CTC Shipbuilding Consultants Ltd | Professional & scientific | 2018 |
| Ctdex Limited | Information & communication | 2025 |
| CTE Fabrications Limited | Administrative & support | 2018 |
| CTE Group Limited | Administrative & support | 2017 |
| CTE Supplies Limited | Administrative & support | 2003 |
| Ctfc Ltd | Wholesale & retail | 2019 |
| Ctip GP Limited | Administrative & support | 2008 |
| CTM Management Limited | Construction | 2011 |
| CTO Services Ltd | Information & communication | 2021 |
| CTR Bouncy Castle Hire Ltd | Administrative & support | 2026 |
| CU3E Ltd | Information & communication | 2023 |
| Cube 3D Design Limited | Administrative & support | 2012 |
| Cube Building & Joinery Ltd | Construction | 2018 |
| Cube Collectables Ltd | Wholesale & retail | 2024 |
| Cube Group Holdings Limited | Financial services | 2019 |
| Cube Property Services Limited | Professional & scientific | 2001 |
| Cube PSL Holdings Limited | Professional & scientific | 2016 |
| Cubelus Limited | Information & communication | 2016 |
| Cubetek Applications Limited | Information & communication | 2016 |
| Cubist Consulting Services Ltd | Professional & scientific | 2018 |
| Cucomm Ltd | Wholesale & retail | 2024 |
| CUE Digital Limited | Administrative & support | 2015 |
| Cuilcara Limited | Information & communication | 2017 |
| Culan Strategy Limited | Professional & scientific | 2017 |
| Culcheth Carpets Limited | Wholesale & retail | 2002 |
| Culcheth Engineering Limited | Professional & scientific | 2021 |
| Culcheth Macadams Limited | | 1976 |
| Culcheth Mails & Retail Limited | Financial services | 2015 |
| Culcheth News Ltd | Wholesale & retail | 2023 |
| Culcheth Osteopathic Practice Limited | Health & social care | 2003 |
| Culcheth Properties Limited | Real estate | 2001 |
| Culcheth Travel Ltd | Administrative & support | 2026 |
| Culcheth Tyres Ltd | Wholesale & retail | 2018 |
| Culina Asset Management Limited | Transport & logistics | 2019 |
| Culinary Crown Ltd | Wholesale & retail | 2025 |
| Cult of Fitness Ltd | Arts & recreation | 2017 |
| Cultivate Consulting Limited | Administrative & support | 2024 |
| Culture Consulting Limited | Professional & scientific | 2021 |
| Culture Warrington | Education | 2012 |
| Culzean Developments Ltd | Construction | 2015 |
| Culzean Generation Limited | Energy | 2017 |
| Culzean Power Limited | Energy | 2014 |
| Culzean W2E Limited | Energy | 2018 |
| Cumberland Sports Village Management Limited | Construction | 2021 |
| Cumbraven Property Investments Ltd | Real estate | 2020 |
| Cumie Limited | Administrative & support | 2019 |
| Cunard Construction Ltd | Construction | 2015 |
| Cunliffe & Wright Limited | Construction | 2007 |
| Cuos Limited | Real estate | 2014 |
| Cupperscales Engineering Services Limited | Other services | 2007 |
| Curio Consulting Services Ltd | Professional & scientific | 2019 |
| Curlew Solutions Limited | Administrative & support | 2015 |
| Curo Bespoke Investments Ltd | Real estate | 2026 |
| Curran Mechanical Limited | Professional & scientific | 2026 |
| Current Electrical Solutions Ltd | Construction | 2024 |
| Current Waste Ltd | Information & communication | 2024 |
| Currie Hindley (Holdings) Limited | Professional & scientific | 1954 |
| Currie Hindley Limited | Wholesale & retail | 2005 |
| Currie Support Limited | Administrative & support | 2021 |
| Curries and Kebabs Limited | Hospitality | 2024 |
| Curry Junction (Warrington) Ltd | Hospitality | 2025 |
| Curtis Blue Limited | Extraterritorial | 2005 |
| Curtis Red Limited | Extraterritorial | 1998 |
| Curved Spaces Limited | Professional & scientific | 2014 |
| Custom Print Limited | Manufacturing | 1984 |
| Customconversionsuk Ltd | Arts & recreation | 2024 |
| Cutout Prints Ltd | Professional & scientific | 2023 |
| Cutt Civil Engineering Limited | Administrative & support | 2014 |
| Cutting and Edging Services Ltd | Manufacturing | 2025 |
| Cvhg Limited | Professional & scientific | 2024 |
| CW Cleaning Services Ltd | Administrative & support | 2019 |
| CW Documentation Limited | Administrative & support | 2018 |
| CW Marine Services Limited | Professional & scientific | 2018 |
| CW Personal Training Ltd | Arts & recreation | 2025 |
| CWL Brewco Limited | Hospitality | 2024 |
| Cxotech Ltd | Information & communication | 2024 |
| CY Engineering Solutions Ltd | Professional & scientific | 2014 |
| Cyanwave Ltd | Professional & scientific | 2017 |
| Cyber Guidance Limited | Information & communication | 2014 |
| Cyberhub Limited | Information & communication | 2014 |
| Cyberian Defence Ltd | Information & communication | 2019 |
| Cybernetix Ltd | Information & communication | 2021 |
| Cybersecia Limited | Information & communication | 2017 |
| Cybersecurity Consulting Services Ltd. | Administrative & support | 2016 |
| Cybertom Solutions Limited | Administrative & support | 2007 |
| Cyclehouse Limited | Wholesale & retail | 2005 |
| Cycling Projects | Education | 1991 |
| Cyclops Industries MB Limited | Professional & scientific | 2009 |
| Cygnets of Moore Ltd | Health & social care | 2021 |
| Cylinder Sales Ltd | Energy | 2021 |
| Cylinder Testing Services Limited | Extraterritorial | 2008 |
| Cynmart Health Care Ltd | Health & social care | 2013 |
| CYPRINUS50 Ltd | Administrative & support | 2023 |
| Cyprium Communications Limited | Information & communication | 2009 |