| Calvert Construction Limited | Construction | 2014 |
| Calvesten Limited | Real estate | 1994 |
| Calvinco Ltd | Transport & logistics | 2026 |
| Calvincoo Ltd | Transport & logistics | 2026 |
| Cal’S Carpentry Ltd | Construction | 2026 |
| CAM Building Services Ltd | Construction | 2024 |
| CAM Joinery & Building Services Ltd | Construction | 2023 |
| CAM Project Services Ltd | Construction | 2025 |
| Camar Deal Ltd | Wholesale & retail | 2018 |
| Camaya Limited | Information & communication | 2025 |
| Cambio Capital Limited | Financial services | 2017 |
| Cambio Counselling Limited | Health & social care | 2015 |
| Cambio Property Limited | Real estate | 2016 |
| Cambrian Terrace Management Company Limited | Households | 2014 |
| Cambridge Climate Change Services Ltd | Professional & scientific | 2024 |
| Cambridge Construction (Northern) Ltd | Construction | 2012 |
| Cambridge Cottage Limited | Real estate | 2009 |
| Cambridge Project Advisory Ltd | Professional & scientific | 2020 |
| Camdeny Consulting Ltd | Administrative & support | 2019 |
| Camdor Transport Ltd | Transport & logistics | 2023 |
| Cameg Developments Limited | Construction | 2016 |
| Cameg Project Management Limited | Professional & scientific | 2009 |
| Camellia House Nursing Home Limited | Education | 2005 |
| Camelo Limited | Wholesale & retail | 2011 |
| Camera-Pan Limited | Information & communication | 2023 |
| Cameron & Ltd | Administrative & support | 2022 |
| Cameron Brand Studio Limited | Professional & scientific | 2026 |
| Cameron James Professional Recruitment Ltd | Administrative & support | 2010 |
| Cameron Siete Ltd | Wholesale & retail | 2025 |
| Cameron Smith Properties Ltd | Real estate | 2024 |
| Camfield Supplies Limited | Wholesale & retail | 2023 |
| Camilla Violet Ltd | Construction | 2026 |
| Camino Data Services Ltd | Information & communication | 2023 |
| Camino Group Ltd | Transport & logistics | 2026 |
| Camippel Ltd | Professional & scientific | 2015 |
| Camjah Limited | Administrative & support | 2017 |
| Camlex Global Business Ltd | Wholesale & retail | 2022 |
| Camlex Trading Ltd | Wholesale & retail | 2023 |
| Cammell Laird (North-East) Limited | Energy | 1977 |
| Cammell Laird (Wearside) Limited | Energy | 1995 |
| Camp France Limited | Education | 2013 |
| Camp Suisse Limited | Education | 2013 |
| Campanile Investments Ltd | Financial services | 2020 |
| Campbell Grove Talent Ltd | Administrative & support | 2025 |
| Campbell Wood Search Limited | Administrative & support | 2025 |
| Campeng Consulting (UK) Limited | Professional & scientific | 2021 |
| Camper Monkey Ltd | Manufacturing | 2019 |
| Campfire PR Limited | Professional & scientific | 2012 |
| Campion Florists Limited | Wholesale & retail | 2015 |
| Camplong D'Aude Holiday Limited | Real estate | 2003 |
| Camps Plant Ltd | Construction | 2025 |
| Camps Transport & Recovery Ltd | Transport & logistics | 2026 |
| Campus Corporation Limited | Hospitality | 2010 |
| Campuslife Limited | Information & communication | 2007 |
| Camstead Limited | Real estate | 1986 |
| CAMTRIX277 Ltd | Health & social care | 2022 |
| Camulodunum Investments Ltd | Financial services | 2017 |
| Camyorkshire | Health & social care | 2019 |
| CAN Qualifications Limited | Education | 2019 |
| Can-Do Finance Limited | Financial services | 2011 |
| Canaan UK Limited | Information & communication | 2003 |
| Canal Engineering Limited | Manufacturing | 2001 |
| Canalside Community Music Space CIC | Arts & recreation | 2021 |
| Canarlo Limited | Information & communication | 2025 |
| Canary Homes Leeds Ltd | Construction | 2018 |
| Canary Records Limited | Wholesale & retail | 2022 |
| Cancer Support Yorkshire | Health & social care | 1987 |
| Candelene Limited | Professional & scientific | 2014 |
| Candid Drip Inc Ltd | Wholesale & retail | 2025 |
| Candid HR Limited | Administrative & support | 2018 |
| Candid PR Limited | Professional & scientific | 2009 |
| Candle Learning Ltd | Information & communication | 2016 |
| Candle Shack Limited | Manufacturing | 2010 |
| Candlecontrol Ltd | Information & communication | 2025 |
| Candlelighters Trading Limited | Extraterritorial | 1990 |
| Candy Artists Limited | Professional & scientific | 2020 |
| Candy Cloud 1 Leeds Limited | Wholesale & retail | 2025 |
| Candy Lover Ltd | Wholesale & retail | 2023 |
| Candy Shop Yorkshire Ltd | Wholesale & retail | 2026 |
| Candy Spa Limited | Administrative & support | 2025 |
| Candyland Events Limited | Hospitality | 2016 |
| Canfield-Payne Insurance Consultants Limited | Financial services | 2004 |
| Cango Travel Ltd | Transport & logistics | 2024 |
| Canklow Bridge Ltd | Wholesale & retail | 2022 |
| Canklow Holdings Ltd | Financial services | 2024 |
| Cannobio Limited | Real estate | 2023 |
| Cannon Electrical Services Limited | Construction | 1987 |
| Canny Calibre Limited | Other services | 2019 |
| Canny Methods Ltd | Financial services | 2023 |
| Cano Bar & Grill Ltd | Hospitality | 2025 |
| Cano Management Limited | Hospitality | 2025 |
| Canonbury Publishing Limited | Information & communication | 2003 |
| Canstruqt Ltd | Construction | 2025 |
| Canteen Leeds Ltd | Hospitality | 2023 |
| Cantik Healthcare Limited | Health & social care | 2022 |
| Cantilever Ltd | Professional & scientific | 2025 |
| Cantonbox 2 Go Ltd | Hospitality | 2025 |
| Cantors Fish Bar Ltd | Hospitality | 2022 |
| Cantrell Consulting Ltd | Administrative & support | 2026 |
| Canty Compliance Limited | Professional & scientific | 2011 |