| Bradvine Springs Limited | Financial services | 2023 |
| Brand Conscience Ltd | Information & communication | 2019 |
| Brandbright Limited | Manufacturing | 1978 |
| Branuwam Ltd | Real estate | 2023 |
| Break the Loop Limited | Professional & scientific | 2019 |
| Brewery Place Property Management Ltd | Households | 2016 |
| Brewhouse Spirits Limited | Manufacturing | 2018 |
| Brian Soule Engineering Limited | Wholesale & retail | 2020 |
| Brickyard Management 2000 Ltd | Real estate | 2002 |
| Bridge of Sighs (Malvern) Limited | Real estate | 2024 |
| Bright Ideas Business Gifts Limited | Wholesale & retail | 1988 |
| Brightzebra Ltd | Professional & scientific | 2020 |
| Brilliance Financial Planning Limited | Financial services | 2008 |
| Brimpsfield Farm Ltd | Hospitality | 2017 |
| Brind's Building Contractors Ltd | Construction | 2023 |
| Bristol NLP Ltd | Other services | 2013 |
| Bristol Psychiatry Ltd | Health & social care | 2018 |
| Brixcell Ltd | Manufacturing | 2019 |
| Broad York Limited | Wholesale & retail | 2016 |
| Brokers Productions Ltd | Information & communication | 2025 |
| Bronze Acorn Limited | Professional & scientific | 2022 |
| Brooknight Security Limited | Administrative & support | 1994 |
| Brooks Handley Limited | Manufacturing | 1997 |
| Broxton Industries Limited | Manufacturing | 1973 |
| Brubeck Limited | Financial services | 2004 |
| Brucehurst Limited | Professional & scientific | 1982 |
| Bryony Investments 2 Limited | Construction | 2019 |
| Bryony Investments Limited | Construction | 2019 |
| Bsafe Heating Limited | Construction | 2011 |
| Buffalo Hyde Ltd | Manufacturing | 2012 |
| Buildgame Limited | Real estate | 1994 |
| Building Better Organisations Limited | Administrative & support | 2014 |
| Built by Barn Limited | Arts & recreation | 2018 |
| Built Collective Ltd | Arts & recreation | 2025 |
| Bulb Consultants Limited | Administrative & support | 2023 |
| Bulb Resourcing Limited | Administrative & support | 2023 |
| Bumble Bakehouse Ltd | Wholesale & retail | 2024 |
| Bundaberg Limited | Agriculture & fishing | 2016 |
| Burford Equine Vets Ltd | Professional & scientific | 2021 |
| Burford Property Holdings Ltd | Construction | 2023 |
| Burford Road Holdings Limited | Real estate | 2023 |
| Burford Surveying Limited | Professional & scientific | 2017 |
| Burkert UK Limited | Administrative & support | 1964 |
| Burley Lodge Stud Limited | Agriculture & fishing | 2019 |
| Busy Fingers Ltd | Administrative & support | 2011 |
| Busy Fingers Printing Ltd | Manufacturing | 2023 |
| Butler Sherborn (SAM Butler) Limited | Extraterritorial | 2014 |
| Butler Sherborn LLP | | 2017 |
| Buy Paint Direct Limited | Extraterritorial | 2022 |
| Buzzard Aerial Ltd | Professional & scientific | 2017 |
| BWF Apprenticeships Limited | Education | 2016 |
| BY ASH Ltd | Professional & scientific | 2025 |
| BY George Developments Ltd | Construction | 2020 |
| BY Matilda Limited | Hospitality | 2024 |
| Byron Cloete Design Limited | Information & communication | 2019 |
| Cable Management Supplies Limited | Manufacturing | 1984 |
| Caboodle Pet Brands Ltd | Wholesale & retail | 2021 |
| Cadyn Limited | Information & communication | 2014 |
| Calbourne Investments Ltd | Real estate | 2020 |
| Call IT Automotive Limited | Professional & scientific | 2020 |
| Callon Hine Developments Ltd | Professional & scientific | 2018 |
| Callon Hine Investments Ltd | Real estate | 2014 |
| Calmsden Events Ltd | Administrative & support | 2009 |
| Calmsden Limited | Professional & scientific | 2014 |
| Calvert Westmeath Limited | Administrative & support | 2008 |
| Calves Hill Limited | Construction | 2005 |
| CAM Flying Club Limited | Extraterritorial | 2022 |
| Cambrica Wealth Management Limited | Financial services | 2025 |
| Camden Lodge (Cheltenham) Limited | Real estate | 2007 |
| Camera Shop Limited | Wholesale & retail | 2012 |
| Canicross Coach Ltd | Education | 2021 |
| Canpro Sports Supplies Limited | Wholesale & retail | 1991 |
| Canton Optics Ltd | Wholesale & retail | 2018 |
| Capitol Carpets Cotswolds Limited | Wholesale & retail | 2003 |
| Capreolus Distillery Ltd | Manufacturing | 2014 |
| Caprio Entertainment Holdings Limited | Professional & scientific | 2007 |
| Carabiner Consulting Ltd | Professional & scientific | 2021 |
| Care Beyond the Chair Ltd | Health & social care | 2025 |
| Career Energy Consultancy Services Limited | Professional & scientific | 2009 |
| Career-Steps Ltd | Information & communication | 2020 |
| Careful Care Limited | Health & social care | 2011 |
| Caritas Management Ltd | Professional & scientific | 2021 |
| Carling Lewis Productions Limited | Extraterritorial | 2016 |
| Carpentry and Partition Services Limited | Construction | 2010 |
| Carrack Consulting Ltd | Professional & scientific | 2023 |
| Carvell Consulting Ltd | Administrative & support | 2025 |
| Casa Cordero Limited | Real estate | 2020 |
| Cascove Limited | Construction | 2013 |
| Cat & Custard POT Limited | Hospitality | 2013 |
| Catalyst Project Solutions Ltd | Professional & scientific | 2019 |
| Catalyst Training (Cirencester) Limited | Arts & recreation | 2016 |
| Catcot Limited | Real estate | 2013 |
| Catherine Bailey Associates Limited | Professional & scientific | 2009 |
| Catkyn Ltd | Construction | 2016 |
| Cattelona Builders Limited | Construction | 2012 |
| CBS (SW) Limited | Construction | 2024 |
| Cbuild Limited | Construction | 2011 |
| CC Event Management Ltd | Professional & scientific | 2022 |
| CCQ Enterprises Limited | Financial services | 2021 |
| CDM Designed Solutions Ltd | Construction | 2010 |