| Bumpers Farm Garage Ltd | Wholesale & retail | 2012 |
| Burfords Property Ltd | Real estate | 2025 |
| Burry Family Holdings Ltd | Other services | 2026 |
| Burry Group Ltd | Construction | 2025 |
| Burry Holiday Co Ltd | Hospitality | 2026 |
| Burry Ltd | Construction | 2011 |
| Burry Property Co Limited | Real estate | 2026 |
| Burry Sealants Ltd | Construction | 2026 |
| Burry Services Ltd | Construction | 2026 |
| Burton Grange Management Company Limited | Households | 2015 |
| Burts Building Limited | Construction | 2025 |
| BUS Fayre Ltd. | Hospitality | 2016 |
| Business Edge Network Ltd | Information & communication | 2010 |
| Business Resolutions Limited | Professional & scientific | 1993 |
| Business UN Limited | Professional & scientific | 2009 |
| Butter BUN Ltd | Hospitality | 2025 |
| Buttercups Kindergarten Ltd | Health & social care | 2024 |
| BVC Solutions Ltd | Professional & scientific | 2022 |
| Bwtraining Ltd | Other services | 2023 |
| BY Brook Valley Academy Trust | Education | 2012 |
| Byass Group Ltd | Information & communication | 2023 |
| Bybrook Stone Limited | Construction | 2003 |
| Bymaw Ltd | Construction | 2025 |
| C & G Aggregates Limited | Professional & scientific | 2024 |
| C a Grogan Limited | Construction | 2003 |
| C E P Electrical Solutions Limited | Construction | 2016 |
| C Hale Property Limited | Real estate | 2022 |
| C Kempson Physio Ltd | Health & social care | 2012 |
| C M Graham Farming Ltd | Agriculture & fishing | 2018 |
| C P Fire Consultants Ltd | Public administration | 2006 |
| C-Squared Media Ltd | Information & communication | 2014 |
| C. Cryer Ltd | Manufacturing | 2008 |
| C. G. Goodchild Limited | Construction | 1983 |
| C. J. Hooper Limited | Construction | 2002 |
| C.B Window Cleaning Services Limited | Administrative & support | 2022 |
| C.E.L. (Engineering) Limited | Extraterritorial | 1974 |
| C.E.L. Group Limited | Financial services | 1981 |
| C.G.F. Builders Limited | Construction | 2002 |
| C.J.G Interiors Ltd | Wholesale & retail | 2023 |
| C.S. Properties (Bristol) Ltd | Real estate | 2000 |
| CA Bidding Services Ltd | Administrative & support | 2017 |
| Cabin Properties Ltd | Real estate | 2026 |
| Cactus Travel Ltd | Administrative & support | 2021 |
| Cadblane Limited | Hospitality | 1986 |
| Cadbury Heath Ltd | Wholesale & retail | 2020 |
| Cadence Construction and Renovation Ltd | Construction | 2020 |
| Caduceus Solutions Ltd | Professional & scientific | 2024 |
| Caerusco Limited | Hospitality | 2020 |
| Cafe Chippenham Ltd | Hospitality | 2025 |
| Caffe Moka Limited | Hospitality | 2018 |
| Caldbeck Oakes Ltd | Professional & scientific | 2013 |
| Caledonia Bidco Limited | Professional & scientific | 2016 |
| Calefour Limited | Professional & scientific | 2016 |
| Calliope at Work Limited | Other services | 2020 |
| Callow Park Management Limited | Extraterritorial | 2008 |
| Calne Heritage Centre Trust | Other services | 2004 |
| Calne Osteopathy Limited | Health & social care | 2023 |
| Camasonics Limited | Manufacturing | 2002 |
| Cambourne Systems Ltd | Information & communication | 2026 |
| Camel Estuary Apartments Limited Liability Partnership | | 2006 |
| Camera Security Management Services Limited | Real estate | 2015 |
| Camera Security Services Limited | Professional & scientific | 1998 |
| Caminus Insight Limited | Professional & scientific | 2025 |
| Campack Limited | Administrative & support | 1999 |
| Canadian Colours Equestrian Ltd | Information & communication | 2017 |
| Canburry Farms LLP | | 2014 |
| Cando Contracts (Holdings) Limited | Financial services | 2021 |
| Cando Contracts Limited | Administrative & support | 2009 |
| Cankal Software & IT Consultancy Ltd | Information & communication | 2018 |
| Canon Court Farm Limited | Agriculture & fishing | 2002 |
| Cantwell Consulting Ltd | Information & communication | 2019 |
| Canunderwell Limited | Professional & scientific | 2012 |
| Capbrown Consulting Ltd | Professional & scientific | 2010 |
| Capsnow Logistics Limited | Transport & logistics | 2025 |
| Car-Tech Corsham Limited | Wholesale & retail | 2006 |
| Carbon Chaos Limited | Information & communication | 2019 |
| Carbon Threesixty Limited | Manufacturing | 2017 |
| Cardinal Online Ventures Limited | Wholesale & retail | 2011 |
| Care Link Connect Ltd | Extraterritorial | 2025 |
| Carer Hub Limited | Administrative & support | 2022 |
| Carey Capability Ltd | Professional & scientific | 2025 |
| Carforu Limited | Wholesale & retail | 2025 |
| Carlink INT. Ltd | Wholesale & retail | 2026 |
| Carpathia Holdings Limited | Financial services | 2021 |
| Carpe Diem Consultants Ltd | Administrative & support | 2014 |
| Carpet Deals Group Limited | Extraterritorial | 2023 |
| Carpet Deals Limited | Extraterritorial | 2023 |
| Carrot Head Supplies Ltd | Wholesale & retail | 2023 |
| Carter Environmental Developments Ltd | Construction | 2017 |
| Carter Environmental Holdings Ltd | Financial services | 2013 |
| Carter Environmental Ltd | Administrative & support | 2013 |
| Casa Design and Installation Ltd | Administrative & support | 2014 |
| Casa Maintenance Ltd | Construction | 2023 |
| Casali Recruitment Ltd | Administrative & support | 2022 |
| Case & Trotman Limited | Construction | 2006 |
| Case Accounting Ltd. | Professional & scientific | 2013 |
| Cash Fore Clubs Ltd | Wholesale & retail | 2021 |
| Casm Limited | Professional & scientific | 2009 |
| Caspian Childcare Group Ltd | Financial services | 2026 |
| Caspian Horse Society | Administrative & support | 1999 |