| Bubble Tea Ltd | Professional & scientific | 2016 |
| Bubble Tree Quizzes Ltd | Other services | 2025 |
| Bubble UP Bristol Ltd | Administrative & support | 2021 |
| Bubblemee Limited | Information & communication | 2022 |
| Bubbles and Toad Limited | Hospitality | 2023 |
| Bubbles Dog Wash Limited | Other services | 2021 |
| Bubblex Limited | Administrative & support | 2021 |
| Bubu & Nero Trans Ltd | Transport & logistics | 2025 |
| Buccaneer Inns Limited | Hospitality | 2024 |
| Bucephalus Capital Limited | Extraterritorial | 2001 |
| Buchanan's Wharf Management Company Limited | Households | 1987 |
| Bucket HAT LAB Ltd. | Wholesale & retail | 2024 |
| Bucketlistspots Ltd | Information & communication | 2025 |
| Buckingham Cleaners Limited | Other services | 2015 |
| Buckingham Gardens Day Nursery Ltd | Education | 2017 |
| Buckingham Lodge (Management Company) Limited | Households | 1994 |
| Buckingham Place Clifton (Management) Limited | Households | 1975 |
| Buckland Court (Dartmouth) Management Company Limited | Households | 2000 |
| Buckland Court (Paulton) Limited | Households | 1999 |
| Bucklands END Limited | Households | 2023 |
| Buckloop Limited | Professional & scientific | 2014 |
| Buckscastle Ltd | Extraterritorial | 2020 |
| Buckshaw Limited | Real estate | 2020 |
| Bucky Investments Ltd | Real estate | 2017 |
| Bucovina Productions Ltd | Information & communication | 2025 |
| Bucuresti Mini Market Ltd | Wholesale & retail | 2020 |
| BUD Development Limited | Professional & scientific | 2008 |
| BUD Systems Limited | Information & communication | 2016 |
| Budbury Limited | Information & communication | 2003 |
| Budd 86 Ltd | Professional & scientific | 2026 |
| Budd Consultancy Limited | Professional & scientific | 2017 |
| Budd Plant Limited | Wholesale & retail | 2010 |
| Budd Surgical Limited | Health & social care | 2018 |
| Buddha Punch Studios Ltd | Information & communication | 2026 |
| Buddies Yate Community Interest Company | Health & social care | 2022 |
| Buddy & Barney Ltd | Wholesale & retail | 2016 |
| Buddy Apps Imperative Ltd | Information & communication | 2021 |
| Buddy Pubs Limited | Hospitality | 2025 |
| Buddy UK Operations Ltd | Information & communication | 2022 |
| Budget Cleaning Limited | Administrative & support | 2021 |
| Budget Comps Ltd | Wholesale & retail | 2026 |
| Budget Pack 2016 Limited | Extraterritorial | 2014 |
| Budget Warehouse Ltd | Wholesale & retail | 2025 |
| Budgetr Ltd | Information & communication | 2021 |
| Budweiser Budvar UK Limited | Wholesale & retail | 2001 |
| Bueller Limited | Information & communication | 2014 |
| Buenos Aires Latino Ltd | Hospitality | 2026 |
| Buffalo Collective Ltd | Arts & recreation | 2024 |
| Buffalo Fundraising Consultants Limited | Professional & scientific | 2005 |
| Buffalo Sound Recorder Limited | Information & communication | 2006 |
| Buffery Property Ltd | Real estate | 2016 |
| Buffettique Ltd | Financial services | 2023 |
| Buffle Limited | Professional & scientific | 2008 |
| Buffy Limited | Other services | 2006 |
| Bufton Locksmiths Ltd | Construction | 2015 |
| Bugbrand Ltd. | Manufacturing | 2010 |
| Bugbug Ltd | Agriculture & fishing | 2025 |
| Bugbuy Limited | Wholesale & retail | 2026 |
| Bugby Project Solutions Limited | Professional & scientific | 2013 |
| Buglass Technology Services Limited | Information & communication | 2023 |
| Bugo Services Limited | Health & social care | 2025 |
| Buihome Bristol Limited | Real estate | 2025 |
| Build & Fitness Limited | Wholesale & retail | 2016 |
| Build 2 Plan Limited | Construction | 1999 |
| Build 3D Solutions Ltd | Information & communication | 2022 |
| Build and Break Ltd | Construction | 2023 |
| Build Bristol Build Ltd | Construction | 2017 |
| Build BS9 Limited | Construction | 2018 |
| Build Carbon Zero Solutions Ltd | Real estate | 2021 |
| Build Clean (Bristol) Limited | Administrative & support | 2014 |
| Build Club Studios Ltd | Manufacturing | 2025 |
| Build Coaching Ltd | Arts & recreation | 2016 |
| Build Compliance Ltd | Construction | 2026 |
| Build Haven Limited | Construction | 2024 |
| Build IT (South West) Limited | Construction | 2006 |
| Build Life House Group Ltd | Wholesale & retail | 2022 |
| Build Logistics Ltd | Real estate | 2016 |
| Build Maintain Bristol Ltd | Construction | 2020 |
| Build Properties (Bristol) Ltd | Real estate | 2016 |
| Build Right Recruitment Ltd | Administrative & support | 2024 |
| Build-Plus Limited | Construction | 2015 |
| Buildable Projects Limited | Construction | 2018 |
| Buildco South West Limited | Construction | 2020 |
| Builddesk Limited | Information & communication | 2003 |
| Buildem Ltd | Construction | 2026 |
| Building 13 Ltd | Other services | 2015 |
| Building 16. Ltd | Transport & logistics | 2017 |
| Building Analysis & Testing Limited | Professional & scientific | 2006 |
| Building and Reinstatement Services Ltd. | Construction | 2025 |
| Building Better Housing Community Interest Company | Construction | 2022 |
| Building Energy Experts Ltd | Construction | 2016 |
| Building Energy Group Ltd | Professional & scientific | 2020 |
| Building Energy Practice Ltd | Construction | 2012 |
| Building Hands Limited | Construction | 2015 |
| Building New Space SW Ltd | Construction | 2022 |
| Building Plans by Design Limited | Professional & scientific | 2018 |
| Building Recruitment Company Limited | Administrative & support | 1999 |
| Building Roots Limited | Construction | 2026 |
| Building Services Ltd | Construction | 2019 |
| Building Solutions (Bristol) Limited | Construction | 2009 |