| Busy Little Bees Nursery (Shirley) Limited | Health & social care | 2006 |
| Busybyte Software Ltd | Information & communication | 2015 |
| Butau Ltd | Health & social care | 2014 |
| Buti Limited | Other services | 2024 |
| Butler & Harrington Ltd | Wholesale & retail | 2021 |
| Buyabargain Limited | Wholesale & retail | 2007 |
| Buzzdoctor Limited | Health & social care | 2019 |
| BWD Commercial Ltd | Real estate | 2020 |
| BWD Real Estate Ltd | Real estate | 2020 |
| Bwncath Property Limited | Real estate | 2022 |
| BY Emel Ltd | Wholesale & retail | 2023 |
| BY Joshua French Ltd | Information & communication | 2024 |
| BYA Consultancy Ltd | Administrative & support | 2023 |
| Byrne the Engineers Limited | Construction | 2010 |
| Byron Court (Knowle) Management Company Limited | Households | 2013 |
| Byte Technology Limited | Manufacturing | 2013 |
| Bytec Limited | Professional & scientific | 1987 |
| Byteopolis Limited | Information & communication | 2021 |
| BZ Property Holdings Limited | Construction | 2018 |
| BZH International Ltd | Manufacturing | 2024 |
| C & J Recycling Limited | Other services | 2010 |
| C & L R Services Ltd | Hospitality | 2024 |
| C & Q Solutions Limited | Professional & scientific | 2012 |
| C & R Creative Designs Limited | Extraterritorial | 2005 |
| C and M Allen Ltd | Professional & scientific | 2024 |
| C Bastock Limited | Extraterritorial | 2007 |
| C C S Electrical Services Limited | Construction | 2016 |
| C D Equestrian Limited | Agriculture & fishing | 2023 |
| C D G B Limited | Financial services | 2007 |
| C Doody Consultancy Ltd | Construction | 2018 |
| C E H Ashley Legal Limited | Administrative & support | 2022 |
| C G J Building Services Limited | Construction | 1993 |
| C J Construct Limited | Construction | 2012 |
| C J Contracts Electrical Ltd | Construction | 2019 |
| C J P Lingerie Limited | Wholesale & retail | 2024 |
| C N Tax Dispute Resolutions Limited | Professional & scientific | 2023 |
| C V Training Limited | Transport & logistics | 2015 |
| C W J Associates Limited | Professional & scientific | 2013 |
| C&L Housing Solutions Ltd | Real estate | 2020 |
| C&M Kiernan Pipelines Construction Limited | Construction | 2012 |
| C&R Creative Designs (Property) Ltd | Construction | 2021 |
| C&R Lewis Ltd | Water & waste | 2020 |
| C-Nich Ltd | Construction | 2020 |
| C. P. W. Services Limited | Administrative & support | 1981 |
| C.E.A. International Limited | Professional & scientific | 1993 |
| C.G.Plastics Limited | Manufacturing | 2003 |
| C.M. Douglas Limited | Real estate | 1975 |
| C.P Projects Ltd | Construction | 2022 |
| C.R.J. Construction Limited | Construction | 2008 |
| C.S.G. Associates Limited | Administrative & support | 2005 |
| C25 Property Services Limited | Real estate | 2025 |
| C2L Ltd | Information & communication | 2013 |
| CA Coding Limited | Information & communication | 2022 |
| CAA Electrical Ltd | Construction | 2023 |
| CAB Consultants Limited | Real estate | 2019 |
| CAB Service Limited | Transport & logistics | 2014 |
| Caboodle Education Limited | Professional & scientific | 2018 |
| CAC Burton Fish & Chips Limited | Hospitality | 2026 |
| Cactus Group Limited | Information & communication | 2019 |
| Caddy Club Golf Ltd | Arts & recreation | 2019 |
| Cadeaux Spa Ltd | Other services | 2023 |
| Cadlake Limited | Administrative & support | 1999 |
| Cafe @ Fairfax Ltd | Hospitality | 2025 |
| Cafe Carva Limited | Wholesale & retail | 2025 |
| Cafe Isabella Ltd | Hospitality | 2018 |
| Cafe Kibo Ltd | Hospitality | 2025 |
| Cafe Ooss Ltd | Hospitality | 2023 |
| Caffe Ideas Limited | Hospitality | 2014 |
| Caffeideas Holdings Limited | Financial services | 2026 |
| Cailon Capital Limited | Professional & scientific | 2017 |
| Caitem Ltd | Information & communication | 2013 |
| Caldix Limited | Real estate | 1961 |
| Cali BON Ltd | Real estate | 2022 |
| Calibre Heating & Plumbing Ltd | Construction | 2021 |
| Call Nexus Limited | Information & communication | 2003 |
| Callaghan Property Ltd | Real estate | 2017 |
| Callaghan Software Ltd | Information & communication | 2007 |
| Callan Business Solutions Ltd. | Real estate | 2023 |
| Calm and Chilled Ltd | Wholesale & retail | 2020 |
| Calms Consulting Ltd | Information & communication | 2019 |
| Cals Aesthetic Ltd | Arts & recreation | 2024 |
| Calver Consulting Ltd | Construction | 2019 |
| Cambridge Carbonates Limited | Mining & quarrying | 1993 |
| Cambridge Medipark Limited | Construction | 2002 |
| Camera One Ltd | Administrative & support | 1995 |
| Camerley Limited | Real estate | 1977 |
| Cameron & Cameron Limited | Professional & scientific | 2022 |
| Cameron Legal Ltd | Professional & scientific | 2010 |
| Camp Hill Rugby Club Limited | Arts & recreation | 2009 |
| Campbell P&L Property Limited | Households | 2023 |
| Campcan Limited | Administrative & support | 2018 |
| CAN Consulting Partners Limited | Professional & scientific | 2019 |
| CAN Property Services Limited | Real estate | 2019 |
| Candlelight Holdings Limited | Real estate | 2005 |
| Candlelight Property Limited | Real estate | 1999 |
| Canegreen Limited | Extraterritorial | 1982 |
| Canning Town Suites Limited | Real estate | 2020 |
| Cannock L Agencies Ltd | Other services | 2022 |
| Canopus Holdings Ltd | Health & social care | 2024 |
| Cantella Farms Limited | Agriculture & fishing | 1986 |