| B & R Carter Brickwork Limited | Construction | 2017 |
| B & R Khera Limited | Hospitality | 1985 |
| B C Venue Limited | Hospitality | 2021 |
| B E Property 1 Limited | Real estate | 2018 |
| B J Carbery Limited | Professional & scientific | 2015 |
| B R K Electrical Limited | Construction | 2012 |
| B W Electrical Installations Ltd | Construction | 2008 |
| B&R Automotive Ltd | Wholesale & retail | 2025 |
| B&R Property Developments Ltd | Construction | 2025 |
| B&S Social Company Limited | Hospitality | 2019 |
| B-Precise Publications Ltd | Information & communication | 2025 |
| B-Trend Ltd | Wholesale & retail | 2020 |
| BA Machining Limited | Manufacturing | 2015 |
| Babette Trade Ltd | Wholesale & retail | 2024 |
| Baby First AID Ltd | Other services | 2016 |
| Babylon Graphics Ltd | Professional & scientific | 2018 |
| Baceline Ltd | Information & communication | 2023 |
| Badger Digs Ltd | Hospitality | 2006 |
| Baga Traders Ltd | Wholesale & retail | 2025 |
| Bagavi Limited | Wholesale & retail | 2013 |
| Baidhu ZR Limited | Real estate | 2022 |
| Bailies the Barber Shop Ltd | Other services | 2026 |
| Bains Estates Ltd | Real estate | 2023 |
| Bainscare Limited | Administrative & support | 2001 |
| Baird Management Limited | Transport & logistics | 2012 |
| Bajones Estates Limited | Real estate | 2025 |
| Bakayoko Music Company Limited | Wholesale & retail | 2018 |
| Bake Box Bakery Limited | Manufacturing | 2020 |
| Bakeshine Ltd | Administrative & support | 2013 |
| Balaclava Projects Limited | Construction | 2015 |
| Balm Leamington Limited | Health & social care | 2025 |
| Bal’S Kitchen Ltd | Hospitality | 2026 |
| BAM 1059 Ltd | Real estate | 2018 |
| BAM Boom International Ltd | Wholesale & retail | 2021 |
| Bama Properties Limited | Real estate | 2024 |
| Bamae Limited | Wholesale & retail | 2018 |
| Banditos Hideout Ltd | Hospitality | 2023 |
| Banner Developments Warwickshire Limited | Construction | 2023 |
| Banner Lane Global Investments Ltd | Construction | 2023 |
| Banner Lane Investment Project Ltd | Construction | 2023 |
| Banner Properties Warwickshire Ltd | Construction | 2023 |
| Banner Street Ltd | Real estate | 2015 |
| Bar Heroes Ltd | Professional & scientific | 2025 |
| Barber's at 131 Limited | Other services | 2017 |
| Barbora Ventures Ltd | Wholesale & retail | 2025 |
| Barclay SMS Limited | Extraterritorial | 2019 |
| Barex Legal Services Ltd | Professional & scientific | 2022 |
| Barkel Ltd | Information & communication | 2019 |
| Barker Fernandez Group Ltd | Financial services | 2022 |
| Barney&Co Ltd | Wholesale & retail | 2022 |
| Barton Aluminium Foundries Limited | Manufacturing | 2015 |
| Barton Conduits Limited | Manufacturing | 2015 |
| Barton Engineering Limited | Manufacturing | 2015 |
| Barton Group Limited | Manufacturing | 2015 |
| Barton Tubes Limited | Manufacturing | 2015 |
| Baserri Ltd | Hospitality | 2022 |
| Bash Consultancy Limited | Professional & scientific | 2016 |
| Basilium Limited | Real estate | 2014 |
| Bassford & Bruce Limited | Professional & scientific | 2026 |
| Batchelors Builders Limited | Construction | 2013 |
| Bay View Residents Co (Torcross) Ltd. | Households | 1988 |
| Bayer Design (UK) Limited | Manufacturing | 2017 |
| Bayleaf Cookery School Franchising Limited | Education | 2023 |
| Bayleaf Cookery School LLP | | 2013 |
| Bazria Limited | Professional & scientific | 1999 |
| Bbdarklighter Ltd | Professional & scientific | 2024 |
| BD Care Warwick Ltd | Health & social care | 2019 |
| BDF Decorator Limited | Construction | 2019 |
| Bduk Design Limited | Construction | 2016 |
| BE Brilliant Recruitment Ltd | Administrative & support | 2022 |
| Beacon 360 Ltd | Professional & scientific | 2022 |
| Beansprout Games Limited | Information & communication | 2025 |
| Bear & Wills Ltd | Information & communication | 2019 |
| Bearmore Consulting Ltd | Professional & scientific | 2021 |
| Bearwear Clothing Limited | Wholesale & retail | 2015 |
| Beast Mark Ltd | Extraterritorial | 2021 |
| Beast MK Ltd | Wholesale & retail | 2021 |
| Beata Gorska Ltd | Health & social care | 2021 |
| Beatbox (Warwickshire) LLP | | 2019 |
| Beau Homes (Ettington) Limited | Construction | 2016 |
| Beau Homes Limited | Administrative & support | 2014 |
| Beauchamp Group Limited | Financial services | 1983 |
| Beauchamp Tara Limited | Real estate | 2024 |
| Beauchamp Wealth Limited | Financial services | 1987 |
| Beauchamps Lodge Trading Limited | Professional & scientific | 2011 |
| Beauty Heart & Soul Limited | Health & social care | 2014 |
| Beauty ROW Ltd | Other services | 2025 |
| Beautyroombuckden Ltd | Other services | 2021 |
| BEB Design Ltd | Professional & scientific | 2021 |
| Beba's Modern Greek Ltd | Hospitality | 2020 |
| BEC N Call Ltd | Administrative & support | 2024 |
| Beckton House Management Company Ltd | Construction | 2018 |
| Bedale Development Limited | Construction | 2019 |
| Bedford Real Estate Ltd | Real estate | 2021 |
| Bedford Street Loft Management Co Ltd | Households | 2014 |
| Bedfordshire Waste Management Limited | Water & waste | 2019 |
| Bedsforbuilders.Com Limited | Administrative & support | 2017 |
| Bedson Investments Limited | Arts & recreation | 2020 |
| Bedworth Barbers Ltd | Other services | 2024 |
| BEE20 Consultants Ltd | Extraterritorial | 2022 |