| Burnell Group Ltd | Arts & recreation | 2023 |
| Burnell Plastering Services Ltd | Construction | 2023 |
| Burnett Food Co Ltd | Hospitality | 2020 |
| Burnham Spice Ltd | Hospitality | 2019 |
| Burning Sheep Productions Limited | Information & communication | 2025 |
| Burns Construction Bristol Ltd | Construction | 2014 |
| Burns Plumbing & Heating Ltd | Construction | 2017 |
| Burns Services Ltd | Construction | 2024 |
| Burnside (Bristol) Limited | Administrative & support | 2008 |
| Burnside Accounting Solutions LLP | | 2016 |
| Burnside Limited | Other services | 2007 |
| Burnt Oak Films Limited | Information & communication | 2019 |
| Burnt Vinyl Recordings Ltd | Information & communication | 2023 |
| Burntbox Ltd | Information & communication | 2018 |
| Burnthouse Solar Limited | Energy | 2014 |
| Burra North Street Limited | Hospitality | 2023 |
| Burra Property Holdings Ltd | Real estate | 2026 |
| Burridge Holdings Ltd | Real estate | 2019 |
| Burrington Parish Room Limited | Education | 2010 |
| Burrington Property Limited | Real estate | 2018 |
| Burrough Hawkins Limited | Professional & scientific | 2015 |
| Burston Gibbons Ltd | Professional & scientific | 2021 |
| Burt Properties Limited | Real estate | 2025 |
| Burt Surgical Services Limited | Health & social care | 2020 |
| Burt's Caribbean Jerk Ltd | Hospitality | 2026 |
| Burton & COX Estates Ltd | Real estate | 2026 |
| Burton Engineering Solutions Limited | Professional & scientific | 2017 |
| Burton Sweet Business and Rural Services Limited | Administrative & support | 2017 |
| Burwalls Lessees Freehold Limited | Households | 2014 |
| Bury Power Limited | Energy | 2015 |
| Bury View Management Ltd | Real estate | 2010 |
| BUS Stop News Bristol Ltd | Wholesale & retail | 2016 |
| Busbar Solutions Ltd | Manufacturing | 2022 |
| Busby Enterprises Limited | Professional & scientific | 2026 |
| Bush Court Management (Alveston) Limited | Households | 1989 |
| Bushey Solutions Ltd | Professional & scientific | 2025 |
| Bushey Supplies Limited | Administrative & support | 2013 |
| Business & Professional DRY Cleaning Limited | Administrative & support | 2014 |
| Business Buddha Design & Media Limited | Professional & scientific | 2023 |
| Business Buying Partners Ltd | Professional & scientific | 2023 |
| Business Clean Star Ltd | Administrative & support | 2025 |
| Business Connect Store Limited | Wholesale & retail | 2024 |
| Business Designs & Interiors Ltd | Construction | 1999 |
| Business Electrical Ltd | Construction | 2012 |
| Business Energy Systems Limited | Construction | 1990 |
| Business Forms Express Limited | Manufacturing | 1987 |
| Business Golf Networking Ltd | Arts & recreation | 2018 |
| Business in Sport Ltd | Other services | 2014 |
| Business Lighting Limited | Wholesale & retail | 2002 |
| Business on Purpose Limited | Professional & scientific | 2020 |
| Business Rates Consult Ltd | Professional & scientific | 2022 |
| Business Sense Consulting Ltd | Extraterritorial | 2025 |
| Business Services Development Ltd | Administrative & support | 2021 |
| Business Show Media Ltd | Administrative & support | 2020 |
| Business Show Media NL Ltd | Administrative & support | 2026 |
| Business Sorted Ltd | Professional & scientific | 2006 |
| Business Success Matrix Limited | Extraterritorial | 2013 |
| Business Thinkers Limited | Professional & scientific | 2011 |
| Business Waste Recycling Ltd | Water & waste | 2016 |
| Business West (Holdings) | Other services | 1874 |
| Business West Limited | Other services | 2013 |
| Business Zero Limited | Administrative & support | 2014 |
| Businessbridge Limited | Wholesale & retail | 2025 |
| Businesscapture Limited | Professional & scientific | 2009 |
| Businy Ltd | Wholesale & retail | 2022 |
| Busk Benchmark Limited | Transport & logistics | 2017 |
| Bussy Electrical Services Ltd | Construction | 2017 |
| Busy BEE Pilning Ltd | Real estate | 2025 |
| Busy Bees Accountancy Limited | Professional & scientific | 2025 |
| Busy Beespoke Cleaning Company Limited | Administrative & support | 2025 |
| Busy Panda Property Services Limited | Administrative & support | 2023 |
| Busy Paws Ltd. | Other services | 2012 |
| Butcombe Brewery Limited | Manufacturing | 2003 |
| Butcombe Brewing Company Limited | Manufacturing | 2003 |
| Butcombe Property Services Limited | Construction | 2006 |
| Butfirstskin Ltd | Wholesale & retail | 2022 |
| Butlers Cafe Limited | Hospitality | 2016 |
| Butson Construction Limited | Construction | 2024 |
| Buttercup Baby Limited | Wholesale & retail | 2020 |
| Buttercup Barn Day Nursery Ltd | Education | 2009 |
| Butterfly Creative Therapy Limited | Health & social care | 2017 |
| Buttergrove Housing Limited | Extraterritorial | 2020 |
| Buttermere Homes Limited | Construction | 2013 |
| Buttermere Properties Limited | Construction | 2002 |
| Butties Sandwich Bar Ltd | Hospitality | 2017 |
| Button Eray Limited | Manufacturing | 2024 |
| Button Property Holdings Limited | Real estate | 2018 |
| Butts Orchard Management Company Limited | Households | 1991 |
| Buxseed Consultancy Ltd | Information & communication | 2019 |
| Buxton Butchers Holdings Ltd | Financial services | 2022 |
| Buxton Butchers Ltd | Wholesale & retail | 2008 |
| Buxton Pies Limited | Manufacturing | 2017 |
| Buxton Property Developments Ltd | Real estate | 2021 |
| Buy Box Go Ltd | Wholesale & retail | 2025 |
| Buy Sell Pass Ltd | Administrative & support | 2020 |
| Buyology Ltd | Wholesale & retail | 2006 |
| Buysphere Ltd | Wholesale & retail | 2026 |
| BUYTICA1122 Ltd | Wholesale & retail | 2025 |
| Buyvista Ltd | Wholesale & retail | 2026 |
| BUZ Corporation Limited | Information & communication | 2010 |