| Autobahn Cars Limited | Wholesale & retail | 2018 |
| Autobitz Online Ltd | Wholesale & retail | 2022 |
| Autobodies Limited | Wholesale & retail | 2025 |
| Autofleet Recovery Ltd | Wholesale & retail | 2025 |
| Automed Ltd | Wholesale & retail | 2021 |
| Automotive Vehicle Specialist's Ltd | Wholesale & retail | 2024 |
| Autowholesale Contract Hire Limited | Wholesale & retail | 1997 |
| Auxilium Medical Services Ltd | Administrative & support | 2019 |
| AVB Limited | Extraterritorial | 2004 |
| Avery Estate Agents Limited | Real estate | 2005 |
| Aves Care Group Ltd | Financial services | 2020 |
| Aves Contract Services Ltd | Administrative & support | 2021 |
| Avon and Somerset Family Law LLP | | 2016 |
| Avon Court Management (Weston-Super-Mare) Limited | Households | 1975 |
| Avon Ductwork Limited | Construction | 2008 |
| Avon Electro-Plating Services Limited | Manufacturing | 1976 |
| Avon Partitioning Solutions Ltd | Administrative & support | 2016 |
| Avondale (WSM) Maintenance Company Limited | Real estate | 1989 |
| Avonsome Limited | Health & social care | 2018 |
| AVP Transport Solutions Ltd | Transport & logistics | 2026 |
| AXN Security SW Ltd | Administrative & support | 2025 |
| Axon Chauffeur Ltd | Transport & logistics | 2026 |
| AYS DRY Cleaning Ltd | Other services | 2012 |
| Aztec Aerocoat Ltd | Construction | 2025 |
| Aztec Electrical & Data Limited | Manufacturing | 2001 |
| Azthetics Ltd | Health & social care | 2018 |
| B & J Mechanical Services Limited | Energy | 2013 |
| B & N Hambidge Ltd | Manufacturing | 2020 |
| B & R Painting and Decorating Ltd | Construction | 2022 |
| B J Campbell South West Limited | Construction | 2005 |
| B KAY Construction Ltd | Construction | 2023 |
| B&C (Southwest) Limited | Construction | 2020 |
| B&M Scaffolding Limited | Construction | 2023 |
| B-Blast Jetting Services Ltd | Administrative & support | 2019 |
| B.B GAS Heating Ltd | Construction | 2019 |
| B.N.I.I. Ltd | Construction | 2023 |
| Bachaa Limited | Hospitality | 2021 |
| Back to Life Properties Ltd | Real estate | 2025 |
| Backes Accounting Services Ltd | Professional & scientific | 2024 |
| Backkonug Ltd | Hospitality | 2019 |
| Backlight Inc Ltd | Professional & scientific | 2011 |
| Bada Property Ltd | Real estate | 2024 |
| Badhen Property Management Ltd | Real estate | 2018 |
| Badman & Badman (Joinery) Limited | Construction | 2006 |
| Badminton Court Weston-Super-Mare Limited | Households | 2013 |
| Baileys Kitchen Limited | Hospitality | 2015 |
| Bake, Make and Serve Ltd | Hospitality | 2025 |
| Baker Street Launderette Limited | Other services | 2026 |
| Bakers Coaches Limited | Administrative & support | 1998 |
| Bala Stores Ltd | Wholesale & retail | 2021 |
| Balancing Support Ltd | Other services | 2025 |
| Balmoral Distribution Ltd | Wholesale & retail | 2023 |
| Balmus Trans Limited | Administrative & support | 2016 |
| Balotech Limited | Other services | 2023 |
| Bama Fabrication Ltd | Manufacturing | 2023 |
| Bambalan Bristol Ltd | Hospitality | 2018 |
| Bangarang Productions Ltd | Information & communication | 2025 |
| Banwell BEE Properties Limited | Real estate | 2025 |
| Banwell Village Pharmacy Limited | Wholesale & retail | 2013 |
| BAP Electrical Services Ltd | Construction | 2023 |
| Barcan Logistics Ltd | Transport & logistics | 2022 |
| Barden Consulting Ltd | Professional & scientific | 2010 |
| Bare Grills Bristol Ltd | Hospitality | 2018 |
| Bare Grills Ltd | Hospitality | 2015 |
| Bare Grills Sports Bar Ltd | Hospitality | 2026 |
| Bare Grills WSM Ltd | Hospitality | 2017 |
| Barkfind Limited | Information & communication | 2026 |
| Barnbeck (SW) Ltd | Real estate | 2018 |
| Barnbeck Investments Ltd | Real estate | 2022 |
| Barnbeck Limited | Hospitality | 2024 |
| Barnbeck Property Solutions Ltd | Construction | 2025 |
| Barretts Bodyshop Ltd | Wholesale & retail | 2024 |
| Barrows Mount Management Company Limited | Households | 2007 |
| Barter Properties Ltd | Real estate | 2025 |
| Bartle Consultancy Limited | Professional & scientific | 2022 |
| Basic Broadcasting Limited | Information & communication | 1996 |
| Bassline Studio Ltd | Administrative & support | 2021 |
| Batista Verde Ltd | Wholesale & retail | 2024 |
| Bay Bengal Ltd | Hospitality | 2024 |
| Bayberry College Limited | Extraterritorial | 2013 |
| Bayview Court (W-S-M) Management Company Limited | Households | 2000 |
| Bbcltd Design & Build Limited | Construction | 2024 |
| BC Lewis Ltd | Information & communication | 2012 |
| Bdvent Ltd | Manufacturing | 2022 |
| Beach (WSM) Properties Limited | Construction | 2017 |
| Beach Condos Ltd | Real estate | 2023 |
| Beach Court Management Company(W.S.M)Limited | Households | 1971 |
| Beach Loco Ltd | Hospitality | 2023 |
| Beacon Eco Homes (Carmel) Limited | Construction | 2024 |
| Beacon Eco Homes 2 Limited | Construction | 2022 |
| Beacon Eco Homes Limited | Construction | 2022 |
| Beacon Haven Ltd | Health & social care | 2025 |
| Beacon Service Management Limited | Professional & scientific | 2026 |
| Beambridge Inn Wellington Ltd | Hospitality | 2025 |
| Beams and Brackets Limited | Manufacturing | 2019 |
| Beansprouts Childcare Ltd | Health & social care | 2024 |
| Bear Land & Developments Ltd | Construction | 2020 |
| Bear Phoenix Creations Ltd | Extraterritorial | 2023 |
| Bearmarket Ltd | Wholesale & retail | 2024 |
| Beauty & Brawn Ltd | Professional & scientific | 2016 |