| BDM Removals Limited | Transport & logistics | 2018 |
| BDP (Northampton) Ltd | Other services | 2017 |
| BDR Logistic Ltd | Transport & logistics | 2017 |
| BDS Ice Development Ltd | Professional & scientific | 2025 |
| BDS Motorsport Limited | Manufacturing | 2020 |
| BDS Ventures Ltd | Arts & recreation | 2004 |
| BDS Webdesign Ltd | Professional & scientific | 2022 |
| BDT Spedition Limited | Transport & logistics | 2020 |
| BE Active Play Ltd | Construction | 2022 |
| BE Legal NOW Ltd | Professional & scientific | 2019 |
| BE Social and Generate Leads Ltd | Other services | 2019 |
| Be-Precise Ltd | Professional & scientific | 2022 |
| Be-Wise Removals (Northants) Ltd | Transport & logistics | 2017 |
| Beacall Developments Ltd | Real estate | 2025 |
| Beach Marketing Ltd | Professional & scientific | 2008 |
| Beacon B2B Ltd | Manufacturing | 2025 |
| Beacon Cars Ltd | Transport & logistics | 2022 |
| Beacon Health Limited | Professional & scientific | 2025 |
| Beaconsfield Childcare Limited | Education | 1996 |
| Beadle Ltd | Administrative & support | 2016 |
| Beagle Accounting Limited | Professional & scientific | 2018 |
| Beajoy Consulting Limited | Professional & scientific | 2008 |
| Bean Accounting Limited | Professional & scientific | 2005 |
| Bean PAY Limited | Professional & scientific | 2005 |
| Beanz Barn Ltd | Arts & recreation | 2024 |
| Bear Gang Clothing Ltd | Wholesale & retail | 2021 |
| BEARS2BULLS Ltd | Other services | 2025 |
| Bearstate Vapor Limited | Wholesale & retail | 2016 |
| Bearstedbell Ltd | Hospitality | 2017 |
| Bearton Road Management Company Ltd | Households | 2019 |
| Beat Contracting Limited | Construction | 2008 |
| Beat Street Pizza Limited | Hospitality | 2025 |
| Beatrice Jenkins Ltd | Wholesale & retail | 2015 |
| Beats 'N' Battles Ltd | Wholesale & retail | 2024 |
| Beau Ginger Ltd | Wholesale & retail | 2023 |
| Beau'Dore Ltd | Extraterritorial | 2019 |
| BEAU8Y & Care PW Ltd | Other services | 2018 |
| Beaufort House SW11 Freehold Limited | Extraterritorial | 2024 |
| Beaumont Prestige Group Limited | Administrative & support | 2023 |
| Beaumont Villa RTM Company Ltd | Households | 2025 |
| Beautiful Borders Limited | Extraterritorial | 2024 |
| Beautique Aesthetics Ltd | Other services | 2019 |
| Beauty & Best Ltd | Wholesale & retail | 2025 |
| Beauty @ NO.5 Ltd | Other services | 2022 |
| Beauty by Frankie Ltd | Other services | 2024 |
| Beauty by Gemma Ltd | Other services | 2022 |
| Beauty by Keyleigh Ltd | Other services | 2021 |
| Beauty by Magda Ltd | Other services | 2026 |
| Beauty Cosmetics (Northampton) Limited | Wholesale & retail | 2019 |
| Beauty Palette Ltd | Other services | 2022 |
| Beauty Station by Alex Ltd | Other services | 2024 |
| Beauty With Ruth Limited | Extraterritorial | 2013 |
| Beauty Withinn ST James Ltd | Other services | 2015 |
| Beautyeurope.Eu Co. UK Ltd | Wholesale & retail | 2022 |
| Beautyfun Cuisines Ltd | Hospitality | 2025 |
| BEB Consultancy (UK) Limited | Professional & scientific | 2008 |
| Bebel Transport Limited | Transport & logistics | 2017 |
| Beca Property Ltd | Real estate | 2025 |
| Beck Case Management Limited | Health & social care | 2010 |
| Beck-Brodie Enterprises Ltd | Extraterritorial | 2023 |
| Beckenham Windows (Pvcu) Limited | Construction | 2005 |
| Beckets Cricket Club Ltd | Arts & recreation | 2025 |
| Becketts Southsea Ltd | Hospitality | 2015 |
| Becky UN Limited | Information & communication | 2023 |
| Bedazzled LED Lighting Ltd | Wholesale & retail | 2024 |
| Bedford Arms Oakley Ltd | Hospitality | 2019 |
| Bedford Meadows Management (Phase 2) Company Limited | Households | 2014 |
| Bedford Meadows Management Company Limited | Households | 2012 |
| Bedford Rentals Limited | Real estate | 1999 |
| Bedlam Breakout C.I.C. | Education | 2015 |
| Bedroc Limited | Professional & scientific | 2024 |
| Bedrock Bedfordshire Housing Ltd | Extraterritorial | 2015 |
| Bedrock Care Limited | Health & social care | 2020 |
| Bedrock Design Consultants Ltd | Professional & scientific | 2002 |
| Bedrock Housing CIC | Real estate | 2023 |
| Bedtime Chesterfield Limited | Wholesale & retail | 2018 |
| Bedworth Glebe Estate Company Limited | Real estate | 1954 |
| BEE Accurate Tax Office Ltd | Professional & scientific | 2025 |
| BEE and FOX Limited | Manufacturing | 2020 |
| BEE Catering Equipment Ltd | Manufacturing | 2016 |
| BEE Clear Ants Ltd | Administrative & support | 2026 |
| BEE Safe Fire Services Ltd | Administrative & support | 2010 |
| BEE TEE Alarms Limited | Administrative & support | 1994 |
| BEE TEE Security Limited | Extraterritorial | 1997 |
| BEE the Change Ecotech UK Ltd | Hospitality | 2025 |
| Beebond Ltd | Construction | 2020 |
| Beebus Consultancy Limited | Professional & scientific | 2018 |
| Beech Healthcare Limited | Professional & scientific | 2000 |
| Beechdale 12 Ltd | Households | 2024 |
| Beeches Maintenance Ltd | Households | 2023 |
| Beechwood Bailey Ltd | Professional & scientific | 2021 |
| Beechwood Mews (Management) Limited | Real estate | 1992 |
| Beehive 25 Limited | Extraterritorial | 2019 |
| Beehive Builds Ltd | Real estate | 2023 |
| Beehive Business Limited | Extraterritorial | 2013 |
| Beekay Scaffolding Limited | Construction | 2008 |
| Beeline Bicycles Limited | Wholesale & retail | 2004 |
| Bees Health & Fitness Ltd | Manufacturing | 2018 |
| Bees Holidays Ltd | Construction | 2018 |
| Bees Medical & Scientific Ltd | Manufacturing | 2018 |