| AT Properties (South West) Limited | Financial services | 2023 |
| Athena Coaching & Consultancy Limited | Professional & scientific | 2023 |
| Attic Games & Entertainment Limited | Information & communication | 1997 |
| ATU & Seini Tuima-Kautoga Ltd | Transport & logistics | 2019 |
| Auld MUG Inns Limited | Hospitality | 2013 |
| Aurora Security Drone Services Ltd | Administrative & support | 2018 |
| Autotech MOT and Service Ltd | Wholesale & retail | 2018 |
| Avason Installations Ltd | Construction | 2024 |
| Aviacapability Limited | Professional & scientific | 2012 |
| Avon Associates (Properties) Limited | Real estate | 1983 |
| Avon Mechanical Services Ltd | Construction | 2017 |
| Avon Security Services Ltd | Administrative & support | 2003 |
| AW Tax Service Ltd | Professional & scientific | 2003 |
| Awcts Limited | Professional & scientific | 2014 |
| Axel & Miguel Construction Ltd | Construction | 2025 |
| Axis Aerospace Ltd | Manufacturing | 2022 |
| Axis Seating Limited | Administrative & support | 2018 |
| B X Sambourne & Co Ltd | Hospitality | 2022 |
| B&T Hospitality Ltd | Hospitality | 2024 |
| BA Food & Events Co Limited | Hospitality | 2025 |
| Baber Animal Feeds Ltd | Wholesale & retail | 2018 |
| Bacchus Events Limited | Other services | 2014 |
| Backonthereperch Ltd | Hospitality | 2025 |
| Bagnold Associates Limited | Financial services | 1999 |
| Bapton Manor Farm Limited | Agriculture & fishing | 1946 |
| Baranbridge Ltd | Wholesale & retail | 2025 |
| Barber Studio Limited | Other services | 2025 |
| Bards & Co Limited | Professional & scientific | 2014 |
| Bards Consultancy Limited | Real estate | 2016 |
| Barn OWL Carpentry & Construction Limited | Construction | 2022 |
| Barns West Ltd | Construction | 2019 |
| Batcombe Limited | Information & communication | 2025 |
| Baxendental Ltd | Health & social care | 2006 |
| BD Aero Services Ltd | Manufacturing | 2025 |
| Bdbean Consulting Limited | Information & communication | 2026 |
| Bean Metalworks Limited | Manufacturing | 2020 |
| Beechcroft Holdings Limited | Manufacturing | 2023 |
| BEN Lloyd General Builder Ltd | Construction | 2022 |
| Benellies Limited | Professional & scientific | 2008 |
| Bentley Property Management Ltd | Households | 2022 |
| Berkeley Cellars Limited | Wholesale & retail | 2018 |
| Berkeley Technologies Limited | Agriculture & fishing | 1987 |
| Bespoke Caviar Limited | Extraterritorial | 2021 |
| Bethany Gray Ltd | Other services | 2023 |
| Better State Limited | Professional & scientific | 2026 |
| Bias London Ltd | Wholesale & retail | 2019 |
| Bibliomania Ltd | Wholesale & retail | 2025 |
| Big Gymwear Ltd | Extraterritorial | 2026 |
| Bitesize Hosting Ltd | Information & communication | 2025 |
| Bitter & Twisted Ltd. | Information & communication | 2001 |
| Bkank Group Limited | Information & communication | 2021 |
| Blackmore Computers Limited | Information & communication | 1997 |
| Blau Group Limited | Wholesale & retail | 2022 |
| Blico Limited | Hospitality | 2012 |
| Blonde Brothers Limited | Manufacturing | 2017 |
| Blongy Property Limited | Real estate | 2011 |
| Bloomin Krackers Ltd | Wholesale & retail | 2012 |
| Blossom Drive Management Company Limited | Real estate | 2015 |
| Blue Brain Consultancy Ltd | Professional & scientific | 2020 |
| Blueasterisk Design Limited | Professional & scientific | 2008 |
| Bluefish M&K Developments Ltd | Construction | 2023 |
| Bluekey Solutions Ltd | Information & communication | 2025 |
| Bohemian Soul Ltd | Wholesale & retail | 2020 |
| Boom Adventures Ltd | Arts & recreation | 2022 |
| Bounce and Smile Ltd | Arts & recreation | 2022 |
| Boundless Consulting Limited | Information & communication | 2021 |
| Boyton Sporting Club Limited | Arts & recreation | 2026 |
| Bradley Road Stables LLP | | 2019 |
| Brand Electrical Services Limited | Construction | 2015 |
| Brick Robot Club Ltd | Education | 2025 |
| Bright & Woodrow Limited | Arts & recreation | 2022 |
| Brilliant Harvest 004 Limited | Construction | 2012 |
| Bristol & Bath Estates Limited | Hospitality | 1988 |
| Bristol BTB Detection Ltd | Professional & scientific | 2025 |
| BRL Investments Limited | Administrative & support | 2016 |
| Brute Force Europe Ltd | Wholesale & retail | 2011 |
| Bryan Loveday Services Limited | Construction | 2014 |
| BTA Architects Ltd. | Professional & scientific | 1991 |
| BY Natures Way Limited | Households | 2024 |
| C & G Surfacing Ltd | Construction | 1999 |
| C J and J a Hall Limited | Administrative & support | 2011 |
| C J Mechs Limited | Professional & scientific | 2015 |
| C S Broad Ltd | Real estate | 2018 |
| C. & L. Transport Limited | Transport & logistics | 1997 |
| C5 Management Limited | Professional & scientific | 2010 |
| C6 Property Ltd | Real estate | 2021 |
| C6M Ltd | Real estate | 2019 |
| Cajon Limited | Real estate | 2001 |
| Callaghan IT Services Ltd | Information & communication | 2013 |
| Campbell Place Management Co. Ltd. | Households | 1993 |
| Candlemakers Group Limited | Financial services | 2022 |
| Candles Provident Trust,Limited | Financial services | 1924 |
| Cannimore Estates Limited | Construction | 2021 |
| Canny Homes Ltd | Real estate | 2016 |
| Capital Fare Limited | Real estate | 2010 |
| Caracara Intelligence Ltd | Information & communication | 2026 |
| Care C&T Limited | Health & social care | 2022 |
| Care Matters (Wiltshire) Limited | Health & social care | 2010 |
| Carmine Lake Limited | Other services | 2015 |
| Carons Care Line Ltd | Health & social care | 2016 |