| Beanwebb Ltd | Financial services | 2024 |
| Beaufort Financial Planning (South West) Limited | Financial services | 2013 |
| Beaufoy Estates Limited | Real estate | 2022 |
| Beaumoore Limited | Financial services | 2025 |
| Beauta Holdings Limited | Professional & scientific | 2019 |
| Beaux Health and Wellbeing Ltd | Other services | 2015 |
| Becket House Management Company Limited | Households | 2006 |
| Bedford House (Taunton) Limited | Construction | 2022 |
| Bedford House (Taunton) Management Limited | Households | 2023 |
| Beeches Farm Enterprises Ltd | Real estate | 2019 |
| Beehive (Management Company) Limited | Real estate | 1999 |
| Behind the Scenes Talent Ltd | Arts & recreation | 2015 |
| Beinglas LLP | | 2023 |
| Belief in Miracles LLP | | 2016 |
| Belior World Ltd | Administrative & support | 2006 |
| Bella Tela Limited | Manufacturing | 2011 |
| Bellamy Transport Consultancy Limited | Professional & scientific | 2014 |
| Bellencer Ltd | Real estate | 2024 |
| Bellex Ltd | Information & communication | 2022 |
| Belly Laugh Productions Limited | Information & communication | 2011 |
| Belmont House Management Company Limited | Real estate | 1991 |
| Below Ground Solutions Ltd | Water & waste | 2017 |
| Beltray Ltd | Construction | 2019 |
| BEN Dixon Building Services Limited | Construction | 2014 |
| BEN Hiles Wealth Management Limited | Professional & scientific | 2021 |
| BEN J Kester Investments Limited | Other services | 2022 |
| BEN Vista Limited | Information & communication | 2005 |
| Benarch Holdings Limited | Financial services | 2024 |
| Benavides Limited | Professional & scientific | 2007 |
| Bench Digital Ltd | Wholesale & retail | 2024 |
| Benchdogs Ltd | Manufacturing | 2019 |
| Bency and SON Limited | Administrative & support | 2023 |
| Benedict Rogers Limited | Health & social care | 2016 |
| Beniflex Ltd | Administrative & support | 2020 |
| Benjamin Henry Bespoke Buildings Limited | Construction | 2023 |
| Benjamin Henry Electrics Limited | Construction | 2023 |
| Benjamin Henry Limited | Manufacturing | 2020 |
| Bennett Residential Management Limited | Real estate | 2007 |
| Bennetts Caribbean Food Services Ltd | Hospitality | 2018 |
| Benoy Build and Property Ltd | Construction | 2026 |
| Bentley Co. Ltd | Professional & scientific | 2022 |
| Bentley Holdings SW Ltd | Financial services | 2025 |
| Bergamot Ventures Limited | Real estate | 2002 |
| Bergen Developments Limited | Extraterritorial | 2022 |
| Berkeley Road (West Hendford) Flats Association Limited(The) | Households | 1974 |
| Bernard G Perry Limited | Administrative & support | 2006 |
| Berry Electrical (Devon) Ltd | Construction | 2021 |
| Berry Purse SA Ltd | Real estate | 2025 |
| Berry-Purse Ltd | Real estate | 2024 |
| Berrys Coaches (Taunton) Limited | Transport & logistics | 2000 |
| Berrys Coaches EOT Limited | Professional & scientific | 2025 |
| Berrys Coaches Holdings Limited | Financial services | 2016 |
| Berrys Holdings Limited | Real estate | 1985 |
| Berrys Property Holdings Limited | Financial services | 2016 |
| Bertish and Company Limited | Financial services | 2009 |
| Beschoice Limited | Education | 2018 |
| Bespoke Cornwall Ltd | Construction | 2019 |
| Bessette Ltd | Wholesale & retail | 2024 |
| Bessie & SLB Properties Limited | Real estate | 2021 |
| Best Buy Business Supplies Ltd | Wholesale & retail | 2025 |
| Best Care Veterinary Services Limited | Professional & scientific | 2024 |
| Best Western Enterprises Limited | Construction | 1967 |
| Better Move Limited | Transport & logistics | 2007 |
| Better Universal Grub Ltd | Hospitality | 2017 |
| Bettercam (Roche) Limited | Construction | 2010 |
| Bettylicious Retro Limited | Wholesale & retail | 2024 |
| Beyond Beauty Bath Ltd | Other services | 2018 |
| Beyond the Wall (SW) Ltd | Professional & scientific | 2024 |
| BG and BG Holdings Ltd | Financial services | 2022 |
| BG and BG Limited | Professional & scientific | 2021 |
| BG and BG Properties Ltd | Real estate | 2025 |
| BH3 Investments Ltd | Construction | 1995 |
| BH4 Investments Ltd | Real estate | 2019 |
| BH5 Investments Ltd | Real estate | 2019 |
| BH6 Investments Ltd | Real estate | 2021 |
| BHM Innovations | Financial services | 2024 |
| Bibby Thomas Ltd | Financial services | 2024 |
| Bicester Property Interiors Ltd | Construction | 2019 |
| Bickenhall Consulting Ltd | Professional & scientific | 2016 |
| Bickenhall Developments Limited | Construction | 2014 |
| Bickenhall Farms Ltd | Agriculture & fishing | 2020 |
| Bickham Developments Limited | Construction | 2024 |
| Bicknell Gardens (Yeovil) Limited | Real estate | 2001 |
| Bicknoller Storage Ltd | Transport & logistics | 2025 |
| Biddys by Soph Ltd | Hospitality | 2025 |
| Big in IT Limited | Information & communication | 2014 |
| Bigbury Bay Pizzas Limited | Hospitality | 2022 |
| Biib Services Ltd | Wholesale & retail | 2019 |
| Bijr Properties Ltd | Real estate | 2021 |
| Bijsterveld Beheer Limited | Financial services | 2006 |
| Bill Dunham Consulting Ltd | Other services | 2019 |
| Billdarr Homes Limited | Construction | 2007 |
| Billson Enterprises Limited | Professional & scientific | 2025 |
| Bindon Estate Management Limited | Real estate | 2007 |
| BIO Energy Engineering Limited | Professional & scientific | 2012 |
| Biome Gym Gear Limited | Wholesale & retail | 2022 |
| Biomed Supplies Limited | Manufacturing | 2004 |
| Biowreath Ltd | Other services | 2026 |
| Birch Analytics Limited | Professional & scientific | 2024 |
| Birches Corner Limited | Administrative & support | 2017 |