| Capital Lets (Midlands) Limited | Real estate | 2000 |
| Capital One (Europe) PLC | Financial services | 1999 |
| Capital One International Holdings Limited | Financial services | 2004 |
| Capital One Shopping UK Limited | Information & communication | 2024 |
| Capital Smart Builders Ltd | Construction | 2022 |
| Capital Travels Ltd | Transport & logistics | 2022 |
| Capital Windows Derby Limited | Construction | 2018 |
| Capitalm Ltd | Information & communication | 2024 |
| Capitol Stone Ltd | Construction | 2015 |
| Capitum Investments (SB) Limited | Real estate | 2017 |
| Capitum Investments Limited | Real estate | 2015 |
| Capo Traders Ltd | Wholesale & retail | 2025 |
| Capoeira Nottingham CIC | Arts & recreation | 2010 |
| Cappadocia Restaurant (Nottingham) Ltd | Hospitality | 2022 |
| Cappello Services Limited | Transport & logistics | 2007 |
| Capri Care Services Ltd | Health & social care | 2022 |
| Capricious Cellars Ltd | Hospitality | 2024 |
| Capricorn Building Services Limited | Construction | 2015 |
| Capricorn Developments (Midlands) Limited | Construction | 2022 |
| Caps Electrical Contractors Limited | Construction | 2018 |
| Capteur & Co Ltd | Professional & scientific | 2025 |
| Capture Events Photography Ltd | Professional & scientific | 2022 |
| Capture Sports Limited | Other services | 2020 |
| Capture Sports Media Limited | Professional & scientific | 2021 |
| Captured Image Limited | Administrative & support | 2003 |
| Capturelete Limited | Information & communication | 2019 |
| Captureourwedding.Com Limited | Professional & scientific | 2017 |
| Car & Commercial Repairs Limited | Wholesale & retail | 2003 |
| Car and Coach Trimmers Ltd | Wholesale & retail | 2021 |
| Car Body Experts Ltd | Wholesale & retail | 2019 |
| Car Bootliners UK Limited | Manufacturing | 2012 |
| Car Colston Filling Station Ltd | Administrative & support | 2010 |
| Car Colston Limited | Professional & scientific | 2003 |
| Car Dealers UK Ltd | Wholesale & retail | 2024 |
| Car Doctors Limited | Wholesale & retail | 2006 |
| Car Fixers Pro Ltd | Wholesale & retail | 2024 |
| Car Parking Deals Ltd | Wholesale & retail | 2023 |
| Car Scouts Bodyshop Limited | Wholesale & retail | 2020 |
| Car Scouts Limited | Wholesale & retail | 2013 |
| Car Seat Covers Nottingham Ltd | Manufacturing | 2024 |
| Car Spa Club Notts Ltd | Administrative & support | 2025 |
| Car Spa Club WB Ltd | Wholesale & retail | 2024 |
| Car Spa NG17 Limited | Administrative & support | 2023 |
| Car Store Limited | Wholesale & retail | 1980 |
| Car Store.Com Limited | Wholesale & retail | 1978 |
| Caramel Bidco Limited | Financial services | 2022 |
| Caramel Creative Arts Ltd | Education | 2017 |
| Caramel Midco Limited | Financial services | 2022 |
| Caravan 2009 Limited | Wholesale & retail | 2009 |
| Carbajal Investment Ltd | Construction | 2014 |
| Carben Services Limited | Construction | 2011 |
| Carbon Efficiency Limited | Information & communication | 2023 |
| Carbon Efficiency Rating (Software) Limited | Information & communication | 2023 |
| Carbon Tyres Limited | Wholesale & retail | 2022 |
| Carboniferous Limited | Extraterritorial | 2013 |
| Card Craze Ltd | Wholesale & retail | 2025 |
| Carden-Lovell Holdings Limited | Real estate | 2022 |
| Cardez Ltd | Real estate | 2018 |
| Cardiac ANB Limited | Health & social care | 2023 |
| Cardinal Sailing Ltd | Arts & recreation | 2013 |
| Cardinal Star Resources UK Limited | Information & communication | 2026 |
| Cardiovasc Ltd | Health & social care | 2025 |
| Cards and Coins Collectibles Ltd | Wholesale & retail | 2026 |
| Cards Etcetera (Yorkshire) Limited | Wholesale & retail | 2005 |
| Cardy Property Services Ltd | Real estate | 2024 |
| Care (Sheffield) Limited | Health & social care | 2001 |
| Care 4 YOU Care Agency Ltd | Administrative & support | 2023 |
| Care @ Rainbow`S END Limited | Health & social care | 2008 |
| Care Ambassadors Ltd | Health & social care | 2025 |
| Care and Trust Limited | Health & social care | 2022 |
| Care Bear Hampers and Events Ltd | Wholesale & retail | 2025 |
| Care by Design Limited | Professional & scientific | 2006 |
| Care by US Ltd | Health & social care | 2003 |
| Care by US Services Limited | Professional & scientific | 2018 |
| Care Clinical Services Ltd | Health & social care | 2024 |
| Care Connect Nottingham Limited | Administrative & support | 2022 |
| Care Consultants Limited | Construction | 1994 |
| Care Fertility (London) Limited | Health & social care | 2013 |
| Care Fertility (Northampton) Limited | Health & social care | 1995 |
| Care Fertility Birmingham Limited | Health & social care | 2015 |
| Care Fertility Chester (Holdings) Limited | Health & social care | 2017 |
| Care Fertility Chester Limited | Health & social care | 2017 |
| Care Fertility Group Limited | Health & social care | 2005 |
| Care Fertility Holdings Limited | Financial services | 2019 |
| Care Fertility Leeds Limited | Health & social care | 2019 |
| Care Fertility Liverpool Limited | Health & social care | 2018 |
| Care Fertility Southwest Limited | Health & social care | 2023 |
| Care Fertility Tamworth Limited | Professional & scientific | 1987 |
| Care Fertility Topco Limited | Financial services | 2022 |
| Care Fertility Woking Limited | Health & social care | 2019 |
| Care Korner Ltd | Health & social care | 2025 |
| Care Leaver Local Offer Limited | Information & communication | 2021 |
| Care Leeds LLP | | 2005 |
| Care Line Homecare Limited | Health & social care | 1998 |
| Care Never Sleeps Limited | Administrative & support | 2011 |
| Care Plus Suppliers Ltd | Health & social care | 2016 |
| Care Quality Solutions Limited | Health & social care | 2018 |
| Care Recruitment and Consultancy Ltd | Administrative & support | 2023 |
| Care U Deserve Limited | Health & social care | 2025 |
| Care Wells Limited | Health & social care | 2023 |