| Banyan Care Homes 3 Limited | Health & social care | 2025 |
| Banyan Care Homes Limited | Health & social care | 2020 |
| Banyan Grove Properties Ltd | Real estate | 2025 |
| Banyan Software Ascend UK Limited | Information & communication | 2026 |
| Banyan Software UK Limited | Information & communication | 2021 |
| Banyanfa Ltd | Wholesale & retail | 2026 |
| BAO Logistics Limited | Transport & logistics | 2024 |
| Baobab (Bristol) Limited | Information & communication | 2006 |
| Baobab Consulting Limited | Professional & scientific | 2006 |
| Bapit Limited | Information & communication | 2004 |
| Baptiste Estates Limited | Hospitality | 2021 |
| Bar Matt Ltd | Hospitality | 2023 |
| Bar Roque Limited | Hospitality | 2014 |
| Bar Wars Limited | Real estate | 2003 |
| Bara Studio Limited | Professional & scientific | 2023 |
| Barak Meridian Ltd | Wholesale & retail | 2025 |
| Barak Services Ltd | Health & social care | 2022 |
| Baraka Mall Ltd | Real estate | 2022 |
| Baranwheel Court Management Company Limited | Households | 2001 |
| Barbarian Barbers Ltd | Other services | 2024 |
| Barbecue Syria Limited | Hospitality | 2026 |
| Barber Adams Holdings Ltd | Real estate | 2026 |
| Barber Box Bristol Ltd | Other services | 2024 |
| Barber Company Bristol Ltd | Other services | 2016 |
| Barber Joe's Limited | Other services | 2026 |
| Barber Music Limited | Information & communication | 2006 |
| Barbera Vinimport Ltd | Wholesale & retail | 2014 |
| Barbican House Management Company Limited | Real estate | 2018 |
| Barbican Technologies Ltd | Information & communication | 2014 |
| Barbie Group Ltd | Professional & scientific | 2020 |
| Barbosa Williams Limited | Real estate | 2019 |
| Barbz Limited | Information & communication | 2026 |
| Barcan+Kirby LLP | | 2012 |
| Barcello Logistics Ltd. | Transport & logistics | 2025 |
| Barchook Ltd | Wholesale & retail | 2026 |
| Barclay Properties Bristol Limited | Construction | 2012 |
| Barclayzorne | | 1999 |
| Barcombe Property Management Limited | Households | 1987 |
| Bard Tree Limited | Information & communication | 2023 |
| Bardel Group Limited | | 1981 |
| Bare Competitions Ltd | Extraterritorial | 2024 |
| Barefoot Architects Limited | Construction | 2016 |
| Bareline Beauty Limited | Other services | 2025 |
| Barfly Camden Limited | Hospitality | 2015 |
| Barfoot QS Limited | Professional & scientific | 2014 |
| Bargain World Bristol Ltd | Wholesale & retail | 2024 |
| Bargainshopuk Ltd | Wholesale & retail | 2026 |
| Bargainz International Food Center Ltd | Wholesale & retail | 2021 |
| Barginburst Ltd | Wholesale & retail | 2025 |
| Bargot LP | | 2012 |
| Bari & Sons (Nailsea) Ltd | Hospitality | 2015 |
| Barimigol CIC | Wholesale & retail | 2023 |
| Barken Investments Limited | Real estate | 2022 |
| Barker Care Limited | Health & social care | 1978 |
| Barker Investment Group | Professional & scientific | 2025 |
| Barkers Kennels Limited | Other services | 2009 |
| Barket Place Limited | Other services | 2019 |
| Barley Wood Cider Ltd | Wholesale & retail | 2024 |
| Barley Wood Orchard Ltd | Manufacturing | 2021 |
| Barlow and Straker Ltd | Real estate | 2014 |
| Barmont Properties Limited | Real estate | 2001 |
| Barmont Ventures Limited | Real estate | 2010 |
| Barn Hill Developments Ltd | Construction | 2021 |
| Barn OWL Cottages Ltd | Hospitality | 2023 |
| Barn OWL Court Management Company (Tetbury) Limited | Households | 1987 |
| Barnaby Associates Limited | Professional & scientific | 1999 |
| Barnaby Court Residents Limited | Households | 2005 |
| Barnaby Property Limited | Real estate | 2017 |
| Barnack Trading Centre Limited | Real estate | 1988 |
| Barnard Fine Jewellery Ltd | Manufacturing | 2019 |
| Barnden Management Limited | Real estate | 2004 |
| Barnes & Barnes Surveyors Ltd | Professional & scientific | 2005 |
| Barnes Barnet Ltd | Other services | 2019 |
| Barnes Graham Limited | Professional & scientific | 2000 |
| Barnstaple Care Home Limited | Construction | 2018 |
| Barnstaple Health Limited | Professional & scientific | 2023 |
| Barnstaple Home Improvements Ltd | Construction | 2020 |
| Barnwell Place Management Limited | Households | 2021 |
| Baron Consulting Ltd | Professional & scientific | 2019 |
| Baron Couriers Ltd | Transport & logistics | 2013 |
| Barons Property Centre Group Limited | Financial services | 2016 |
| Barossa Place East Limited | Households | 2006 |
| Barossa Place Ltd | Real estate | 2025 |
| Barossa Place West Limited | Households | 2006 |
| Barrack Power Services Ltd | Manufacturing | 2014 |
| Barracuda Estates Ltd | Real estate | 1996 |
| Barrel Property Rentals Limited | Real estate | 2021 |
| Barret & SON Limited | Financial services | 2012 |
| Barrettine (Industrial) Limited | Manufacturing | 1982 |
| Barrettine Holdings Limited | Manufacturing | 2014 |
| Barrettine Products Limited | Manufacturing | 1982 |
| Barrettone Ltd | Information & communication | 2024 |
| Barretts Newsagents Limited | Wholesale & retail | 1977 |
| Barrettstacey Accounting Limited | Professional & scientific | 2021 |
| Barrettstacey Limited | Professional & scientific | 2019 |
| Barrier Automotive Limited | Wholesale & retail | 2022 |
| Barrington Court Bristol Management Company Limited | Households | 1985 |
| Barrington Innovation Ltd | Manufacturing | 2015 |
| Barrington Recruitment Services Limited | Administrative & support | 2020 |
| Barrington Young Ltd | Administrative & support | 2011 |