| Captus Consulting Limited | Information & communication | 2014 |
| Capua Subsea Ltd | Construction | 2020 |
| Car & Commercial Repair Centre (UK) Limited | Wholesale & retail | 2013 |
| Car 1 North Limited | Wholesale & retail | 2022 |
| Car 2 Go (North West) Ltd | Wholesale & retail | 2014 |
| Car and Van MOT Ltd | Wholesale & retail | 2016 |
| Car and Van Sales (North West) Ltd | Wholesale & retail | 2020 |
| Car Heaven Hand Car Wash (Liverpool) Ltd | Other services | 2018 |
| Car Hospitals Holdings Ltd | Administrative & support | 2016 |
| Car Malam Limited | Wholesale & retail | 2021 |
| Car Park Coating Limited | Construction | 2011 |
| Car Spa & Tyres Ltd | Other services | 2013 |
| Car Spa GUY Ltd | Administrative & support | 2024 |
| Car Valeting Centre (Leigh) Ltd | Administrative & support | 2024 |
| Car Valeting Kensington Ltd | Administrative & support | 2026 |
| Car Wash LUX Limited | Administrative & support | 2025 |
| Cara Kids Ltd | Wholesale & retail | 2009 |
| Caracase Ltd | Transport & logistics | 2024 |
| Caravans Direct Limited | Wholesale & retail | 1996 |
| Carberry Building Services Ltd | Construction | 1997 |
| Carbis Construction (NW) Limited | Construction | 2016 |
| Carbon Benchmark Ltd | Information & communication | 2023 |
| Carbon Happy World Ltd | Other services | 2020 |
| Carbon Metal Roofing Ltd | Construction | 2022 |
| Carbon Neutral 2030 Ltd | Professional & scientific | 2020 |
| Carbon Zero Asset Group Limited | Professional & scientific | 2020 |
| Carboncraftuk Ltd | Extraterritorial | 2024 |
| Carbonex Renewable Energy Ltd | Construction | 2024 |
| Card Snobs Limited | Manufacturing | 2026 |
| Cardboard Collectors Ltd | Water & waste | 2018 |
| Cardigan Convenience Store Ltd | Wholesale & retail | 2025 |
| Cardigan General News Ltd | Wholesale & retail | 2024 |
| Cardinal Business Finance Limited | Financial services | 2010 |
| Cardiology Cases Ltd | Education | 2018 |
| Cardwell Estates (NW) Limited | Real estate | 2026 |
| Cardwell Medical Ltd | Health & social care | 2014 |
| Care 4 ALL 24 Ltd | Administrative & support | 2017 |
| Care Academy Ltd | Education | 2025 |
| Care and Rehab at Home Ltd | Health & social care | 2019 |
| Care Assist Children's Services Limited | Health & social care | 2003 |
| Care Capacity Intelligence Limited | Health & social care | 2026 |
| Care Capital Collective Ltd | Professional & scientific | 2026 |
| Care Confidence Ltd | Health & social care | 2019 |
| Care Connect UK Limited | Health & social care | 2002 |
| Care Home Foot Health Ltd | Health & social care | 2023 |
| Care Perms Ltd | Administrative & support | 2021 |
| Care Pharmacy Limited | Wholesale & retail | 1996 |
| Care Plus Transitions Limited | Health & social care | 2021 |
| Care Ready Training Ltd | Education | 2025 |
| Care Vision Solutions Ltd | Health & social care | 2024 |
| Care With Ellie Limited | Health & social care | 2025 |
| Care Worker Limited | Health & social care | 2014 |
| Care, Love, Pamper Limited | Other services | 2016 |
| Care-Takers (N.W.) Limited | Administrative & support | 2026 |
| CARE4ALL247 Ltd | Administrative & support | 2021 |
| Carecaliraya Ltd | Health & social care | 2015 |
| Carecircle Services Ltd | Health & social care | 2026 |
| Carecompare Services Limited | Health & social care | 2018 |
| Career Connect | Education | 2001 |
| Career Connections Limited | Administrative & support | 1995 |
| Career Craft UK Ltd | Professional & scientific | 2022 |
| Career North Limited | Administrative & support | 2010 |
| Career ST Ltd | Other services | 2018 |
| Careerpath AI CIC | Information & communication | 2026 |
| Careersinblue Ltd | Administrative & support | 2021 |
| Carefoot Maintenance Limited | Manufacturing | 2018 |
| Carefully Crafted Gardens Limited | Arts & recreation | 2025 |
| Carehome Limited | Health & social care | 2003 |
| Carenote.Ai Ltd | Information & communication | 2025 |
| Carerra GTS Limited | Real estate | 2018 |
| Carerra Properties Ltd | Real estate | 2020 |
| Caresyntra Ltd | Information & communication | 2026 |
| Carevalue Structures Holdings Limited | Financial services | 2020 |
| Carevalue Structures Limited | Professional & scientific | 2013 |
| Carey Hospitality Venture Ltd | Professional & scientific | 2025 |
| Cargill's Removal's (NW) Ltd | Transport & logistics | 2025 |
| Cargo Cafe Limited | Hospitality | 2025 |
| Cargone Transport UK Ltd | Transport & logistics | 2025 |
| Cargonw Ltd | Wholesale & retail | 2024 |
| Cargoroute Ltd | Transport & logistics | 2025 |
| Carhall Projects Ltd | Construction | 2024 |
| Cariad Morgan Ltd | Wholesale & retail | 2026 |
| Carina CJ Services Limited | Other services | 2013 |
| Caring Connections Limited | Health & social care | 1992 |
| Caring Point Limited | Health & social care | 2025 |
| Caring Your Eyes Limited | Health & social care | 2019 |
| Caristocrat Ltd | Wholesale & retail | 2019 |
| Carl Alan Limited | Wholesale & retail | 2021 |
| Carl Evans Shopfitting & Joinery Services Ltd | Construction | 2016 |
| Carl Gardner (Author) Ltd | Administrative & support | 2026 |
| Carl Hancocks QA NDT Ltd | Construction | 2025 |
| Carl Joey's Signature Celebrations Limited | Wholesale & retail | 2025 |
| Carl Murphy Holdings Limited | Financial services | 2009 |
| Carl Murphy Properties Limited | Real estate | 2023 |
| Carl Naylor Fitness Ltd | Other services | 2021 |
| Carl Rimmer Ltd | Construction | 2025 |
| Carl Williams Land Surveys Ltd | Professional & scientific | 2021 |
| Carla Holdings Limited | Financial services | 2023 |
| Carla Lane Animals in Need | Health & social care | 1988 |
| Carla Lawson Makeup Ltd | Other services | 2020 |