| Crown Online Trading Ltd | Wholesale & retail | 2020 |
| Crown Tele Ltd | Administrative & support | 2024 |
| Crown&Spur UK Ltd | Wholesale & retail | 2026 |
| Crowne Financial Solutions Ltd | Financial services | 2022 |
| Crowne Property Ventures Ltd | Real estate | 2022 |
| Crownix Ltd | Wholesale & retail | 2026 |
| Crowns Consulting Ltd | Financial services | 2023 |
| Croxton Electrical Ltd | Construction | 2022 |
| Crusader AID | Administrative & support | 2019 |
| Crusader Displays Limited | Water & waste | 1973 |
| Crusader Group Ventures (A1) Limited | Administrative & support | 2019 |
| Crushing Talents Limited | Wholesale & retail | 2019 |
| Crust Busters Ltd | Hospitality | 2026 |
| Crust+Co Ltd | Hospitality | 2025 |
| Crutch World Ltd | Wholesale & retail | 2024 |
| Cryer Coatings Limited | Construction | 2015 |
| Crypto 4 U Limited | Information & communication | 2021 |
| Crypto Broker Services Ltd | Information & communication | 2021 |
| Crypto for YOU Limited | Information & communication | 2021 |
| Crypto Networking Ltd | Information & communication | 2021 |
| Crypto PL Limited | Information & communication | 2021 |
| Crypto-Blog Ltd | Information & communication | 2021 |
| Crystal Clean (NW) Limited | Other services | 2014 |
| Crystal Clean (Preston) Limited | Administrative & support | 2025 |
| Crystal Clean Express (NW) Limited | Administrative & support | 2022 |
| Crystal Leisure Swimming Pools Ltd | Construction | 2014 |
| Crystal Securities Holdings Limited | Financial services | 2023 |
| Crystal Securities Limited | Professional & scientific | 1959 |
| CS Blackpool Limited | Hospitality | 2019 |
| Cs&Hs Properties Limited | Real estate | 2025 |
| Cs&Hs Property Holdings Limited | Financial services | 2025 |
| Csar Tech Ltd | Information & communication | 2024 |
| CSC (NW) Ltd | Professional & scientific | 2025 |
| CSE Developments Limited | Real estate | 2025 |
| CSI Retail Ltd | Wholesale & retail | 2025 |
| CSI Security Systems Limited | Construction | 2009 |
| Cslh Ltd | Professional & scientific | 2013 |
| CSM Surveying & Civil Engineering Ltd | Construction | 2015 |
| Csqms Ltd | Mining & quarrying | 2013 |
| CST INT Ltd | Information & communication | 2014 |
| CSW Digital Ltd | Information & communication | 2026 |
| CTE Surveying Limited | Administrative & support | 2014 |
| CTH GAS Ltd | Wholesale & retail | 2003 |
| CTM Consulting Limited | Professional & scientific | 2016 |
| CTP Northwest Power Washing Service Ltd | Administrative & support | 2019 |
| Ctps Cherry Trees Property Services Ltd | Real estate | 2025 |
| CTS Traffic & Transportation Limited | Administrative & support | 2003 |
| CTX Asset Solutions Limited | Other services | 2007 |
| Cube (Preston) Ltd | Manufacturing | 2022 |
| Cucina Italia Ltd | Hospitality | 2024 |
| Cuerdale Ltd | Professional & scientific | 2021 |
| Cuerden (Holdings) Limited | Financial services | 2014 |
| Cuerden Construction Limited | Construction | 2016 |
| Cuerden Group Limited | Other services | 2019 |
| Cuerden Homes Limited | Wholesale & retail | 1986 |
| Cuerden Limited | Real estate | 2014 |
| Cuerden Valley Cafe Limited | Hospitality | 2015 |
| Cuffs Ice Cream (NW) Limited | Wholesale & retail | 2012 |
| CUI Bono 1 Ltd | Real estate | 2022 |
| CUI Bono Ltd | Real estate | 2021 |
| CUI Bono Properties Ltd | Real estate | 2022 |
| Culachi Services Limited | Other services | 2016 |
| Cullinan Assets Ltd | Real estate | 2024 |
| Cullinan Ventures Limited | Financial services | 2022 |
| Culross Bolton Ltd | Extraterritorial | 2006 |
| Cult Brands Group Limited | Wholesale & retail | 2015 |
| Cultivating Confidence Ltd | Professional & scientific | 2025 |
| Cumbria Asset Finance Limited | Financial services | 2003 |
| Cumbria Software Systems Limited | Information & communication | 1986 |
| Cumbria X-Press Limited | Transport & logistics | 1997 |
| Cumbrian Homes Limited | Construction | 2002 |
| Cumeragh Consultancy Limited | Information & communication | 2014 |
| Cummings Commercials Limited | Wholesale & retail | 2005 |
| Cumulus Computing Limited | Professional & scientific | 2009 |
| Cunning Artificers Limited | Information & communication | 2016 |
| CUP Cure Ltd | Health & social care | 2021 |
| Curanexus Healthcare Limited | Administrative & support | 2025 |
| Cure Clinics Dispensing Services Ltd | Wholesale & retail | 2022 |
| Cure Clinics Specialist Services Ltd | Health & social care | 2025 |
| Cure Clinics Technology Services Ltd | Information & communication | 2025 |
| Cure IT Composites USA Limited | Construction | 2023 |
| Cure IT Ltd | Construction | 2023 |
| Cure Quest Locums Limited | Administrative & support | 2024 |
| Cured Consultancy Ltd | Professional & scientific | 2026 |
| Curious Cars Limited | Other services | 2026 |
| Curious Methods Limited | Other services | 2023 |
| Curious Minds Psychology Limited | Health & social care | 2025 |
| Curly Tail Properties Ltd | Real estate | 2017 |
| Current Flow Electrical Services Ltd | Construction | 2026 |
| Curry Cloud Ltd | Hospitality | 2024 |
| Curtis Developments (NW) Ltd | Real estate | 2014 |
| Curves Boudoir Limited | Professional & scientific | 2026 |
| Curwencare Ltd | Health & social care | 2022 |
| Cushion Mania Limited | Wholesale & retail | 2023 |
| Cushtydinex Limited | Arts & recreation | 2018 |
| Custom CUT Joinery Ltd | Construction | 2025 |
| Custom Holiday Specialists Ltd | Administrative & support | 2025 |
| Custom Label Design Ltd | Manufacturing | 2024 |
| Custom Plates Limited | Extraterritorial | 1998 |
| Custom Registrations Limited | Extraterritorial | 1998 |