| BHH Lift Accommodation Services Limited | Real estate | 2004 |
| Bienvenue Properties Ltd | Real estate | 2017 |
| Biffs.Scrap Ltd | Wholesale & retail | 2025 |
| Biffyb Ltd | Administrative & support | 2021 |
| Big Fish Properties Ltd | Real estate | 2015 |
| Big Fish Property Developments Ltd | Construction | 2021 |
| Bikerbolt Ltd | Wholesale & retail | 2019 |
| Bill (DRC) Limited | Construction | 2018 |
| Bioquip Limited | Manufacturing | 2011 |
| Bird Investments Limited | Real estate | 1987 |
| Black LAB Communications Ltd | Information & communication | 2025 |
| Blue Coral Properties Ltd | Real estate | 2024 |
| Blue Coral Property Solutions Ltd | Real estate | 2024 |
| Blue Sky Concept Design Ltd | Professional & scientific | 2017 |
| Blue Smartie Limited | Education | 2011 |
| Bluebell Planning & Consultancy Limited | Professional & scientific | 2021 |
| Blupark Ltd | Information & communication | 2014 |
| BM Data Solutions Limited | Information & communication | 2024 |
| BM Group Holdings Limited | Information & communication | 2019 |
| BMS Technologies Ltd | Wholesale & retail | 2010 |
| Bnatural Group Ltd | Wholesale & retail | 2019 |
| BO and DOE Limited | Hospitality | 2026 |
| Boatface Leisure Limited | Transport & logistics | 2022 |
| Boce Consulting Ltd | Real estate | 2016 |
| Bokki Technology Limited | Manufacturing | 2022 |
| Book My Digs Ltd | Administrative & support | 2020 |
| Bookworm Tewkesbury CIC | Wholesale & retail | 2015 |
| Bounce Activations Ltd | Professional & scientific | 2025 |
| Boutique Organica Limited | Other services | 2013 |
| Bowrundel Lifestyle Limited | Hospitality | 2020 |
| Box of Frogs Ltd | Professional & scientific | 2026 |
| Boyton Controls & Automation Ltd | Professional & scientific | 2021 |
| BP Cotswold Plastering Ltd | Construction | 2025 |
| Brand Nuts Ltd | Wholesale & retail | 2026 |
| BRAND5 Limited | Arts & recreation | 2013 |
| Brass Tax Limited | Professional & scientific | 2010 |
| Breadwinner Integrations UK Ltd | Information & communication | 2021 |
| Bredon Finance Limited | Financial services | 2022 |
| Bredon Financial Solutions Limited | Financial services | 2026 |
| Bredon Hill Asset Management Limited | Professional & scientific | 2021 |
| Bredon Hill Holdings Limited | Financial services | 2021 |
| Bredon Hill Veterinary Services Limited | Professional & scientific | 2007 |
| Bredon's Brensham Court Management Ltd | Households | 2004 |
| Bredons Hardwick Caravans Limited | Administrative & support | 2000 |
| Briars Developments Limited | Construction | 2013 |
| Bright County Limited | Administrative & support | 2022 |
| Bright Smile Agency Limited | Health & social care | 2024 |
| Bristol Infracare Developments (1) Limited | Real estate | 2003 |
| Bristol Infracare Developments Holdings (1) Limited | Professional & scientific | 2004 |
| Bristol Infracare Lift (1) Limited | Real estate | 2003 |
| Bristol Infracare Lift (2) Limited | Real estate | 2004 |
| Bristol Infracare Lift (3) Limited | Real estate | 2009 |
| Bristol Infracare Lift Holdings (1) Limited | Professional & scientific | 2003 |
| Bristol Infracare Lift Holdings (2) Limited | Real estate | 2004 |
| Bristol Infracare Lift Holdings (3) Limited | Professional & scientific | 2009 |
| Bristol Infracare Lift Limited | Real estate | 2003 |
| Broadway Homes & Developments Ltd | Real estate | 2024 |
| Bromford Assured Homes Limited | Real estate | 1992 |
| Bromford Developments Limited | Construction | 2008 |
| Bromford Housing Group Investments Limited | Construction | 2020 |
| Brookes Fruit & Vegetables Limited | Wholesale & retail | 2013 |
| Brsk ISP Limited | Information & communication | 2022 |
| Brsk Limited | Information & communication | 2020 |
| Brunsdon Property Development Ltd | Real estate | 2025 |
| Brush and Roll Ltd | Construction | 2019 |
| Brutons Hardware Limited | Wholesale & retail | 1998 |
| Brutons of Nailsworth Ltd | Wholesale & retail | 2018 |
| BS Elastomers Ltd | Manufacturing | 2012 |
| Bumpyland Softplay Ltd | Administrative & support | 2022 |
| Burn Piece Limited | Administrative & support | 2000 |
| Bursaryworks Ltd | Information & communication | 2025 |
| Business Borders Limited | Wholesale & retail | 2019 |
| Business Drive Cotswolds Limited | Administrative & support | 2023 |
| Business Printer Solutions Ltd | Administrative & support | 2022 |
| Butwell & Jones Limited | Wholesale & retail | 2005 |
| BY Loho Studios Limited | Wholesale & retail | 2024 |
| C & K Joinery Limited | Construction | 2020 |
| C Software Limited | Information & communication | 1999 |
| C W Hygiene Services Limited | Administrative & support | 2000 |
| C.A.D Cleaning Ltd | Administrative & support | 2025 |
| C.R.P. Securities Limited | Extraterritorial | 1998 |
| C.T.C.H. Limited | Health & social care | 1999 |
| C7COM Ltd | Information & communication | 2023 |
| Cable Intelligence Limited | Administrative & support | 2002 |
| Cabrian Properties Ltd | Real estate | 2024 |
| Caffe' E Vino Limited | Hospitality | 2013 |
| Calathea Property Holdings Ltd | Real estate | 2016 |
| Calavera Technology Ltd | Information & communication | 2017 |
| Callidus Limited | Professional & scientific | 1995 |
| Calmbow Limited | Health & social care | 2018 |
| Calyx London Limited | Real estate | 2026 |
| Campbell Brown Associates Ltd | Administrative & support | 2010 |
| Camsk Imaging Ltd | Health & social care | 2026 |
| Camturn Limited | Manufacturing | 1996 |
| Canterbury Business Centre LLP | | 2020 |
| CAR17 Ltd | Wholesale & retail | 2026 |
| Care Genie Ltd | Information & communication | 2026 |
| Carr Int'L Ltd | Financial services | 2014 |
| Carrant Properties Ltd | Real estate | 2026 |
| Cashmore Property Limited | Real estate | 2021 |