| Bantway Construction Management Limited | Construction | 2020 |
| Barefaced Products Limited | Wholesale & retail | 2026 |
| Barefaced Training Academy Limited | Other services | 2026 |
| Barnes Scaffolding Wiltshire Ltd | Construction | 2025 |
| Barters Farm Holdings Limited | Financial services | 2024 |
| Barters Farm Nurseries Limited | Agriculture & fishing | 1977 |
| Basset Cove Ltd | Administrative & support | 2023 |
| Bates Property Management Group Ltd | Construction | 2026 |
| Bath Business Web Limited | Information & communication | 2007 |
| Bath School of Dance Limited | Arts & recreation | 2023 |
| Bathroom Shop Limited | Wholesale & retail | 2020 |
| Bathstone-Masonry Limited | Construction | 2015 |
| BB Catering Ltd | Hospitality | 2026 |
| BBB South East Limited | Administrative & support | 2021 |
| BBQ Grill Pods Limited | Wholesale & retail | 2026 |
| BCJ Services Limited | Construction | 2002 |
| BE YOU Dentistry Ltd | Health & social care | 2021 |
| Beanstalk Brews Ltd | Hospitality | 2024 |
| Beauty Coll Health Ltd | Wholesale & retail | 2025 |
| BEC Professional Services Ltd | Real estate | 2022 |
| BEE Healthy Limited | Wholesale & retail | 2024 |
| Belgravia 17 Investments Ltd | Real estate | 2020 |
| Belgravia 17 Ltd | Real estate | 2016 |
| Bengoli Spice Limited | Hospitality | 2023 |
| Berkley Catering Limited | Hospitality | 2017 |
| Bespoke Build Design Ltd | Construction | 2026 |
| Bespoke Builds & Design Ltd | Construction | 2026 |
| Bespoke Cars Westbury Ltd | Wholesale & retail | 2024 |
| Best Barbers Westbury Ltd | Other services | 2026 |
| Bestnature Limited | Professional & scientific | 1994 |
| Biddi Scapes Ltd | Administrative & support | 2026 |
| Biss Farm Ltd | Real estate | 2019 |
| BIT PIE Limited | Information & communication | 2025 |
| BKL Heating Ltd | Construction | 2019 |
| Blachotrapez Limited | Wholesale & retail | 2020 |
| Blaise Commercial Finance Limited | Administrative & support | 2017 |
| Blenches Mill Storage Ltd | Transport & logistics | 2020 |
| Blue Ocean Trading Ltd | Wholesale & retail | 2011 |
| Bolwell 17 Ltd | Real estate | 2019 |
| Bolwell 7 Ltd | Real estate | 2019 |
| Bolwell 77 Ltd | Real estate | 2019 |
| Bolwell 777 Ltd | Real estate | 2019 |
| Bolwell Place Ltd | Households | 2019 |
| Bonsai Limited | Extraterritorial | 2025 |
| Boost Speech and Language Therapy Ltd | Health & social care | 2022 |
| Bratton Road Property Management Limited | Households | 2020 |
| Briann Formworks Limited | Construction | 2010 |
| Bridge Accountancy Limited | Professional & scientific | 2007 |
| Bridge Court 1969 Limited | Extraterritorial | 2014 |
| Bridgeway Builders & Groundworks Ltd | Construction | 2026 |
| Bright Domestic Services Ltd | Administrative & support | 2025 |
| Bright Stars Childcare and Education Limited | Education | 2011 |
| British Scurry and Trials Driving Ltd | Arts & recreation | 2026 |
| Broad Lane Land Rovers Ltd | Other services | 2015 |
| Brokerswood Limited | Professional & scientific | 2025 |
| Brook Lane Management Company Limited | Real estate | 1994 |
| Browns Framing Ltd | Wholesale & retail | 2024 |
| Bryant Carpentry & Construction Ltd | Manufacturing | 2022 |
| Building Services Sustainability and Environmental Consultancy Limited | Professional & scientific | 2005 |
| Bull Alloys Ltd | Wholesale & retail | 2023 |
| Bush Developers Ltd | Construction | 2026 |
| Business Implementation of Occupational Safety and Health CIC | Professional & scientific | 2024 |
| Business Rate Advisors Limited | Administrative & support | 2013 |
| Busy Books (Westbury) Ltd | Professional & scientific | 2017 |
| Butcher Bros Ltd | Wholesale & retail | 2022 |
| Buttermark Design Limited | Professional & scientific | 2025 |
| Buzz Marketing Services Limited | Professional & scientific | 1993 |
| Byjama Limited | Information & communication | 2014 |
| Byrd Property Solutions Ltd | Extraterritorial | 2024 |
| Byte Down Limited | Professional & scientific | 2020 |
| C D Smith Construction Limited | Construction | 2016 |
| C&C Elite Developments Ltd | Real estate | 2024 |
| C&C Landscaping Limited | Administrative & support | 2023 |
| C&C Tree Services Ltd | Agriculture & fishing | 2022 |
| C.M. Motors Limited | Wholesale & retail | 2018 |
| Cala Sustain Ltd | Professional & scientific | 2013 |
| Callaway Scaffolds Limited | Construction | 2002 |
| Candar Limited | Manufacturing | 2014 |
| Candy Nails and Beauty Limited | Other services | 2016 |
| Captain Events Ltd | Other services | 2022 |
| Carac Limited | Professional & scientific | 2022 |
| Carrington Smith Horologists Limited | Manufacturing | 2019 |
| Cars Direct (South West) Limited | Wholesale & retail | 2004 |
| Cass Wessex K9 Ltd | Other services | 2012 |
| Catherine Pohl Limited | Health & social care | 2020 |
| CED Haulage Limited | Transport & logistics | 2023 |
| Cesar’S Coffee Limited | Wholesale & retail | 2019 |
| Chamfer Ltd | Manufacturing | 2016 |
| Chandlers Coach Travel Ltd | Extraterritorial | 2005 |
| Channa Holdings Limited | Financial services | 2020 |
| Channa Properties Limited | Real estate | 2017 |
| Chantry Court Care Ltd | Health & social care | 2012 |
| Chantry Court Westbury Ltd | Construction | 2004 |
| Chantry Court Westbury NO. 2 Ltd | Extraterritorial | 2011 |
| Chantry Digital Limited | Wholesale & retail | 2003 |
| Chapman House Management Limited | Households | 2018 |
| Charles Jarvis Limited | Manufacturing | 2006 |
| Charlie S Holdings Ltd | Real estate | 2023 |
| Cheese on Board Ltd | Hospitality | 2024 |
| Chilled Transport Solutions Ltd | Manufacturing | 2025 |