| BV Textiles & Castaway Ltd | Manufacturing | 2015 |
| BW Automotive Solutions Limited | Professional & scientific | 2015 |
| BY Hook OR by Crook Limited | Real estate | 2017 |
| BY Stoneman Ltd | Professional & scientific | 2025 |
| Bywater Services Limited | Professional & scientific | 1999 |
| C & P Business Enterprises Ltd | Professional & scientific | 2025 |
| C Food G Ltd | Hospitality | 2025 |
| C L Davies Properties Ltd | Real estate | 2025 |
| C V (Ward) Limited | Professional & scientific | 1997 |
| C V Lane Limited | Construction | 2014 |
| C.Davis Property Limited | Real estate | 2026 |
| C.F.Mee (Haulage) Limited | Transport & logistics | 2004 |
| C.M Nineyard Cleaners Limited | Administrative & support | 2007 |
| CAD8 Limited | Information & communication | 2023 |
| Cadeby Homes Limited | Construction | 1984 |
| Cademan Developments Limited | Construction | 2019 |
| Caetano UK Limited | Wholesale & retail | 1989 |
| Caird Evered Holdings Limited | Professional & scientific | 2006 |
| Caird Evered Limited | Professional & scientific | 1988 |
| Cairo Beauty Consultancy Ltd | Professional & scientific | 2025 |
| CAL Reid Services Ltd | Professional & scientific | 2023 |
| Calliway Construction Ltd | Construction | 2022 |
| Callow Readymix Limited | Manufacturing | 2011 |
| Callum JAY Mitchell Limited | Extraterritorial | 2024 |
| Camak Services Ltd | Manufacturing | 2015 |
| Camas UK Limited | Professional & scientific | 1938 |
| Cambridgeshire Aggregates Limited | Extraterritorial | 2018 |
| Camfli Ltd | Professional & scientific | 2022 |
| CAN and Will Ltd | Manufacturing | 2025 |
| Candor Care Limited | Construction | 2004 |
| Card Wisher Ltd | Information & communication | 2024 |
| Cardiff Exhausts Limited | Manufacturing | 2001 |
| Careassure Solutions Limited | Professional & scientific | 2026 |
| Carefree Solutions Limited | Information & communication | 2015 |
| Caronbell Limited | Manufacturing | 1965 |
| Carpet Cuts (Coalville) Limited | Wholesale & retail | 2013 |
| Carpow Consultancy Ltd | Professional & scientific | 2026 |
| Cascadas Holdings Ltd | Other services | 2015 |
| Case Development CIC | Professional & scientific | 2011 |
| Cast Iron Repair Services Limited | Extraterritorial | 1996 |
| Cast Iron Welding Services Limited | Manufacturing | 1990 |
| Castle Inn Apartments Limited | Households | 2018 |
| Castlegate Haven Ltd | Hospitality | 2020 |
| Castlespeed Ltd | Manufacturing | 2023 |
| Castleton Sand & Gravel Quarries,Limited | Professional & scientific | 1931 |
| Castor Property Limited | Real estate | 2020 |
| Catadrive Ltd | Transport & logistics | 2015 |
| CB Crystal Clean Ltd | Administrative & support | 2025 |
| Cctv in Operation Ltd | Wholesale & retail | 2012 |
| CD Measham Ltd | Professional & scientific | 2024 |
| Cedartone (Equipment Sales) Limited | Administrative & support | 2005 |
| Central Aggregates Ltd | Professional & scientific | 2015 |
| Central Construction Holdings Limited | Professional & scientific | 2002 |
| Central Construction Services Limited | Mining & quarrying | 1997 |
| Central Group Limited | Professional & scientific | 2007 |
| Central Reptile Rehome Network CIC | Other services | 2026 |
| Central Tools Workshop Ltd | Wholesale & retail | 2021 |
| Century Electronic Security Limited | Administrative & support | 2020 |
| Century Fire and Security Limited | Construction | 2001 |
| Century Gates and Barriers Ltd | Construction | 2014 |
| Century Home Security Solutions Ltd | Administrative & support | 2012 |
| Century Secure Group (UK) Ltd | Construction | 2014 |
| Certus Business Services Ltd | Professional & scientific | 2019 |
| CF Associates Limited | Transport & logistics | 2023 |
| CF Wilkinson Properties Ltd | Real estate | 2023 |
| Challenge Packaging Limited | Manufacturing | 2002 |
| Cham Zeke Ltd | Information & communication | 2023 |
| Channel Transport Limited | Transport & logistics | 2024 |
| Chaperon Rouge Ltd | Extraterritorial | 2025 |
| Charcon Holdings Limited | Professional & scientific | 2009 |
| Charcon Limited | Extraterritorial | 1999 |
| Charles Booth Pre-School Ltd | Education | 2021 |
| Charlesland Ltd | Construction | 2001 |
| Charlesland Property Development Limited | Construction | 1981 |
| Charlie Vaughan Ltd | Information & communication | 2010 |
| Charnwood Electronic Security Limited | Construction | 2000 |
| Charnwood Fencing Limited | Construction | 1988 |
| Charnwood Home and Garden Maintenance Limited | Administrative & support | 2013 |
| Charnwood Investment Properties Limited | Real estate | 2013 |
| Charnwood Kitchens & Interiors Limited | Manufacturing | 2003 |
| Charnwood Machinery Limited | Wholesale & retail | 1977 |
| Chemlabs International Ltd | Wholesale & retail | 2021 |
| Cherrystone Venture Holdings Limited | Manufacturing | 2026 |
| Chilli 'N' Spice Limited | Hospitality | 2013 |
| Chilli Pepper DNA Ltd | Manufacturing | 2025 |
| Chilly Driver Ltd | Transport & logistics | 2024 |
| Chinese Snack Box Limited | Hospitality | 2013 |
| Chitai-Tai Investments Limited | Transport & logistics | 2024 |
| Chookys Chicken Limited | Hospitality | 2026 |
| Chris Sharpe & Co Ltd | Professional & scientific | 2008 |
| Christina Patterson Limited | Arts & recreation | 2013 |
| Chun SEH DAU School of Shaolin Kung FU Ltd | Arts & recreation | 2020 |
| Cinnamon Indian Food Ltd | Hospitality | 2025 |
| CIS Windows Ltd | Construction | 2017 |
| Cisca Ltd | Professional & scientific | 2023 |
| Citadel Environmental Solutions Holding Limited | Professional & scientific | 2021 |
| Citrine Accountancy Ltd | Professional & scientific | 2021 |
| Citrus Commercial Real Estate Advisory Services Limited | Wholesale & retail | 2024 |
| City of Batticaloa UK Limited | Health & social care | 2023 |
| City Shoes (Wholesale) Limited | Wholesale & retail | 1992 |