| Bexley PPP Health Services Limited | Construction | 1998 |
| Beylon Limited | Construction | 1986 |
| Beyo Global Limited | Professional & scientific | 2017 |
| Beyoglu Limited | Hospitality | 2025 |
| Beyond Beauty Boutique Ltd | Other services | 2024 |
| Beyond Boundaries Clothing Ltd | Wholesale & retail | 2025 |
| Beyond Exit Ltd | Administrative & support | 2025 |
| Beyond Metrix Ltd | Information & communication | 2006 |
| Beyond Nine Limited | Wholesale & retail | 2019 |
| Beyond NOW Technology Ltd | Information & communication | 2019 |
| Beyond Pretty Visuals Ltd | Information & communication | 2025 |
| Beyond Science Limited | Professional & scientific | 2018 |
| Beyond Severn Limited | Real estate | 2018 |
| Beyond Sixty Two Ltd | Information & communication | 2018 |
| Beyond the Bark Limited | Professional & scientific | 2023 |
| Beyond the Bean Limited | Manufacturing | 1997 |
| Beyond the MIX C.I.C. | Other services | 2021 |
| Beyond Trees Ltd | Agriculture & fishing | 2016 |
| Beyond Work UK Limited | Information & communication | 2024 |
| Beyond WOW Ltd | Arts & recreation | 2023 |
| Beyondtastee to Go Limited | Hospitality | 2022 |
| Beze Cars Limited | Transport & logistics | 2025 |
| Bezi Transport Ltd | Transport & logistics | 2019 |
| BF Ductwork Fabrications Ltd | Manufacturing | 2024 |
| BF1 Limited | Extraterritorial | 2007 |
| BF13A TF Solar Limited | Energy | 2021 |
| BF16D BHF Solar Limited | Energy | 2021 |
| BF27 BF Solar Limited | Energy | 2021 |
| BF31 WHF Solar Limited | Energy | 2021 |
| BF33C LHF Solar Limited | Energy | 2021 |
| BF33E BHF Solar Limited | Energy | 2021 |
| BF58 Hunts Airfield Solar Ltd | Energy | 2022 |
| BF78 GH Bess Limited | Energy | 2023 |
| BFB Pet Care Limited | Other services | 2023 |
| Bfglass Ltd | Manufacturing | 2021 |
| Bfit PT Studios Limited | Arts & recreation | 2025 |
| BFQ Entertainment Ltd | Hospitality | 2023 |
| BFW Marketing Ltd | Information & communication | 2012 |
| BG Cuisine Ltd | Hospitality | 2019 |
| BG Farming LLP | | 2023 |
| BG Heating & Plumbing Solutions Ltd | Construction | 2022 |
| BG Medical Services Limited | Health & social care | 2019 |
| BG Tech Group Ltd | Wholesale & retail | 2024 |
| BG Thomas Ltd | Wholesale & retail | 2024 |
| BGA Logistics Ltd | Transport & logistics | 2019 |
| Bgbl Consulting Ltd | Professional & scientific | 2024 |
| Bgcp Ltd | Transport & logistics | 2025 |
| BGE Building and Maintenance Ltd | Construction | 2024 |
| BGE Property and Lettings Ltd | Real estate | 2024 |
| BGF Building Company Ltd | Construction | 2017 |
| BGI Management Ltd | Financial services | 2024 |
| BGI Property Management Limited | Real estate | 2021 |
| Bglar Limited | Professional & scientific | 2025 |
| BGM Property Developments Ltd | Households | 2018 |
| BGS Learning Foundation | Education | 2016 |
| BGS Offshore Engineering Services Ltd | Professional & scientific | 2023 |
| Bgsc Hospitality Ltd | Hospitality | 2016 |
| Bgut Ltd | Transport & logistics | 2021 |
| BGVCONSTRUCTION24 Ltd | Construction | 2024 |
| BGZ Ltd | Wholesale & retail | 2023 |
| BH Screeding Ltd | Construction | 2013 |
| BHA Couriers Ltd | Transport & logistics | 2018 |
| Bhadri Consulting Limited | Information & communication | 2011 |
| Bhadvin Properties Limited | Real estate | 2020 |
| Bhagavat Educational Trust Limited | Health & social care | 1998 |
| Bhamra Solutions Limited | Information & communication | 2018 |
| Bharat Consulting Services Ltd | Information & communication | 2024 |
| Bhart Services Ltd | Professional & scientific | 2025 |
| Bhashini VBS Consultancy Limited | Information & communication | 2012 |
| Bhatia International Limited | Wholesale & retail | 2016 |
| Bhavna Motors Limited | Wholesale & retail | 2025 |
| Bhavy Emporium Ltd | Wholesale & retail | 2020 |
| BHB Ashton Court Mansion Limited | Other services | 2025 |
| Bhco Productions Limited | Arts & recreation | 2026 |
| Bhjs Property Limited | Real estate | 2026 |
| BHL Investments Ltd | Real estate | 2020 |
| Bhogal Consulting Ltd | Information & communication | 2021 |
| Bhogals Investments Limited | Real estate | 2021 |
| Bhogals Limited | Wholesale & retail | 2009 |
| Bholan & Co Ltd | Hospitality | 2021 |
| BHP (Bath) Limited | Real estate | 2023 |
| BHP Auto Parts Ltd | Manufacturing | 2026 |
| BHP Property Ltd. | Real estate | 2014 |
| BHQ Partners LLP | | 2023 |
| BHQ Properties Ltd | Households | 2023 |
| BHS Developments Limited | Real estate | 2022 |
| Bhumbla Logistic Ltd | Transport & logistics | 2025 |
| BI & ERP Project Management Ltd | Arts & recreation | 2025 |
| BI Matters Ltd | Other services | 2022 |
| BI SQL Consulting Limited | Information & communication | 2016 |
| Bi-Design Europe Limited | Arts & recreation | 2001 |
| Bianca Blue Collective Ltd | Wholesale & retail | 2024 |
| Bianca Blue Ltd | Wholesale & retail | 2024 |
| Bianca Blue Salon Limited | Other services | 2013 |
| Bianca Star Restaurants Limited | Hospitality | 2025 |
| Bianchi Centrale Limited | Hospitality | 2023 |
| Bianchi Cousins Limited | Hospitality | 2019 |
| Bianco Electrical Services Limited | Construction | 2019 |
| Biani Fabrics and Wears Ltd | Health & social care | 2023 |
| Biba Books Ltd | Information & communication | 2021 |