| Atlas Corporate Holdings Ltd | Financial services | 2018 |
| Atlas Safety Management Limited | Other services | 2015 |
| Austin’S Group Ltd | Financial services | 2020 |
| Avalon Telecom and Technologies Limited | Information & communication | 1998 |
| Avery Gardens Limited | Administrative & support | 2013 |
| AVM Ceramics Ltd | Manufacturing | 2025 |
| Avtar Indian Dance CIC | Education | 2019 |
| AW Frampton & SON Limited | Agriculture & fishing | 2008 |
| Aztec Roofing (South West) Limited | Construction | 2000 |
| B.S. Hardacre Limited | Construction | 1972 |
| B.W. Controls Limited | Manufacturing | 1987 |
| Babel Enterprises Limited | Manufacturing | 2024 |
| Bailey Wright Limited | Professional & scientific | 2012 |
| Bais Solutions Holdings LLP | | 2026 |
| Bais Solutions Ltd | Administrative & support | 2026 |
| Bakehouse and Delights Limited | Wholesale & retail | 2014 |
| Bakerybits Limited | Wholesale & retail | 2011 |
| Ball & Co UK Limited | Manufacturing | 2026 |
| Bancroft Renovation and Maintenance Ltd | Construction | 2025 |
| Bandini Ltd | Professional & scientific | 2002 |
| Bapp&Co Ltd | Energy | 2020 |
| Barberry Consulting Ltd. | Professional & scientific | 2017 |
| Barn Door Productions Ltd | Information & communication | 2007 |
| Barnstaple Motors Limited | Extraterritorial | 2015 |
| Bartons Close Management Company Ltd | Households | 2022 |
| Baseboards.Co Limited | Wholesale & retail | 2021 |
| Batten Services Limited | Administrative & support | 2008 |
| Beacock Cardiology Limited | Health & social care | 2019 |
| Beacon Heights Consultancy Ltd | Professional & scientific | 2020 |
| Bealstart Limited | Extraterritorial | 1987 |
| Beano's Events Ltd | Hospitality | 2020 |
| Beardley Barns Management Company Limited | Hospitality | 2007 |
| Beechhill Store Ltd | Wholesale & retail | 2026 |
| Beef + Lamb New Zealand Limited | | 2003 |
| BEN Bruce Leadwork Ltd | Construction | 2015 |
| BEN Burton Limited | Professional & scientific | 2024 |
| Berkshire Invest Ltd | Real estate | 2019 |
| Besure Screening Ltd | Professional & scientific | 2014 |
| Bewley Property Rentals Ltd | Real estate | 2021 |
| BEYOND360 Limited | Information & communication | 2015 |
| BGC Homes (Taunton) Limited | Professional & scientific | 2006 |
| BI Brains Ltd | Wholesale & retail | 2020 |
| Bike Transfer (Europe) Ltd | Transport & logistics | 2025 |
| Bioenergy Systems Limited | Transport & logistics | 2011 |
| Birch Villa Cakes Ltd | Manufacturing | 2018 |
| Bisdak Ltd | Hospitality | 2024 |
| BJ Dixon Walsh Limited | Professional & scientific | 2010 |
| Black Hollow Group Ltd | Financial services | 2025 |
| Blackdown Homes Limited | Construction | 2006 |
| Blackdown Maintenance Ltd | Construction | 2021 |
| Blakbook Ltd | Wholesale & retail | 2019 |
| Blessed AC Limited | Health & social care | 2020 |
| Bloomin Lovely TOO Ltd | Wholesale & retail | 2018 |
| Bodywise Health & Fitness Limited | Arts & recreation | 1999 |
| Borough Road PUB Co Ltd | Hospitality | 2018 |
| BOS Autocare Ltd | Wholesale & retail | 2023 |
| Botev PLD Ltd | Construction | 2016 |
| Bouhair Limited | Other services | 2015 |
| Bouncy Bear Ltd | Education | 2011 |
| Bove Town Gardens Management Company Limited | Households | 2011 |
| BPO Consultancy Ltd | Professional & scientific | 2020 |
| BRACES4FACES Limited | Manufacturing | 2017 |
| Bradcorp Ltd | Information & communication | 2019 |
| Braddock Properties Limited | Professional & scientific | 2005 |
| Bramley Fields Management Company Limited | Households | 2018 |
| Bramleys Property Investments Limited | Real estate | 2015 |
| Bravova Ltd | Construction | 2016 |
| Brazier Coffee Roasters Ltd | Manufacturing | 2015 |
| Brendon Roofing Limited | Construction | 2004 |
| Brewtwo Ltd | Hospitality | 2024 |
| Brickhaus Cafe Ltd | Hospitality | 2025 |
| Bridge House Brew Ltd | Hospitality | 2024 |
| Bridgefan Limited | Hospitality | 2018 |
| Brin Financial Consultancy Limited | Professional & scientific | 2008 |
| Briscoe House Estates Limited | Households | 2024 |
| Brooke Tutoring Ltd | Education | 2025 |
| BRS Roofing Services Ltd | Construction | 2024 |
| BUILT4U Ltd | Construction | 2019 |
| Bulford Garage Limited | Wholesale & retail | 2003 |
| Bulford Garage Sales Limited | Wholesale & retail | 2003 |
| Burnworthy Limited | Arts & recreation | 1989 |
| Burnworthy Properties Limited | Real estate | 2020 |
| Burnworthy Retreat Ltd | Hospitality | 2020 |
| Burrow Developments Ltd. | Real estate | 1996 |
| Businessoffice Limited | Professional & scientific | 2004 |
| Bussell Group Ltd | Construction | 2026 |
| Buttermoor Farms Limited | Agriculture & fishing | 2002 |
| BY Apex Limited | Manufacturing | 2014 |
| C & C Motor Caravans Ltd | Wholesale & retail | 1998 |
| C Berry Holdings LLP | | 2024 |
| C D Dwellings Ltd | Construction | 2018 |
| C O a Enterprises Ltd | Arts & recreation | 2021 |
| C W Pressure Washing and Maintenance Ltd | Administrative & support | 2025 |
| C&H Lettings Ltd | Real estate | 2025 |
| Cabrito Investments Limited | Professional & scientific | 2002 |
| CAL LAZ Ltd | Transport & logistics | 2025 |
| Calex Engineering Services Limited | Professional & scientific | 2020 |
| Calex Holdings Ltd | Professional & scientific | 2022 |
| Calibre Autos Limited | Wholesale & retail | 2010 |
| Cambridge Research Technology Ltd | Information & communication | 2011 |