| Bavarian Car Deals Ltd | Wholesale & retail | 2025 |
| BAW Transport Limited | Transport & logistics | 2017 |
| Bawa Trading Limited | Administrative & support | 2024 |
| Bawab Enterprise Ltd | Professional & scientific | 2023 |
| Baxra Property Group Ltd | Construction | 2023 |
| Baxstone Limited | Real estate | 2018 |
| Baxter Baristas Ltd | Wholesale & retail | 2007 |
| Baxter Charles (Properties) Limited | Professional & scientific | 2014 |
| Baxter Williams Limited | Professional & scientific | 2016 |
| Baxter's Canine Pet Store Ltd | Wholesale & retail | 2024 |
| Bay 6 Trading Limited | Hospitality | 2015 |
| Bay Accountants Ltd | Professional & scientific | 2004 |
| Bay Campus Developments LLP | | 2013 |
| Bay Defender Limited | Professional & scientific | 1993 |
| Bay Diagnostics Ltd | Health & social care | 2026 |
| Bay E C Ltd | Wholesale & retail | 2024 |
| Bay Education Centre Ltd | Education | 2020 |
| Bay Enterprises Ltd | Real estate | 2013 |
| Bay Groundworks Ltd | Construction | 2020 |
| Bay Leaf Training Ltd | Education | 2026 |
| Bay of Bengal Group Ltd | Hospitality | 2022 |
| Bay Ophthalmic Ltd | Health & social care | 2020 |
| Baya Financial Ltd | Financial services | 2018 |
| Bayan Real Estate Ltd | Real estate | 2014 |
| Baybridge Estates Limited | Hospitality | 1999 |
| Baydomak Limited | Real estate | 2025 |
| Bayern Treuhand & Consulting Limited | Administrative & support | 2013 |
| Bayerntechnic Limited | Wholesale & retail | 2025 |
| Bayersound Limited | Construction | 1990 |
| Bayley News Shops Limited | Wholesale & retail | 1985 |
| Baylis Telecoms Limited | Information & communication | 2017 |
| Baynham Meikle Partnership Limited | Professional & scientific | 2000 |
| Bayo Oniye Resources Ltd | Health & social care | 2015 |
| Bayoak Limited | Manufacturing | 1978 |
| Bayobay Ltd. | Wholesale & retail | 2019 |
| Bayou Software Limited | Information & communication | 2015 |
| Bayshield International Ltd | Wholesale & retail | 2024 |
| Bayston Hill Stores Limited | Wholesale & retail | 2013 |
| Bayston Store Limited | Wholesale & retail | 2019 |
| Bayswater Property Ltd | Real estate | 2025 |
| Bayt AL Reem Ltd | Manufacturing | 2024 |
| Bayt AL Yemeni Ltd | Hospitality | 2020 |
| Bayt Property Investments Limited | Real estate | 2025 |
| Bayt UR Rahman Ltd | Education | 2015 |
| Bayt-Ur-Rahman Masjid Ltd | Education | 2016 |
| Baytt Ltd | Health & social care | 2025 |
| Baytul Imaanah Ltd | Education | 2026 |
| Baytun Housing Ltd | Real estate | 2026 |
| Bayyinaah Ltd | Professional & scientific | 2026 |
| BAZ Barber Services Ltd | Other services | 2025 |
| BAZ Haulage Ltd | Transport & logistics | 2025 |
| BAZ Transport Ltd | Transport & logistics | 2020 |
| Bazaar Hub Ltd | Wholesale & retail | 2024 |
| Bazaar Limited | Wholesale & retail | 2023 |
| Bazaarbay Limited | Wholesale & retail | 2024 |
| Bazan Talent Agency Ltd | Administrative & support | 2018 |
| Bazdar Construction Services Ltd | Administrative & support | 2015 |
| Bazdar Property Developments Ltd | Real estate | 2024 |
| Bazian Fade Ltd | Other services | 2026 |
| Bazlov Ltd | Other services | 2012 |
| Bazza Grill Limited | Hospitality | 2025 |
| Bazzarbay Ltd | Wholesale & retail | 2025 |
| BB 168 Limited | Hospitality | 2023 |
| BB Barber Shop Ltd | Other services | 2025 |
| BB Beef Ltd | Hospitality | 2025 |
| BB Caring Services Limited | Health & social care | 2023 |
| BB Castle Bromwich Limited | Hospitality | 2023 |
| BB Construction (Midlands) Limited | Construction | 2005 |
| BB Development Group Ltd | Financial services | 2022 |
| BB Driving Ltd | Transport & logistics | 2018 |
| BB Electrical Wholesalers Ltd | Wholesale & retail | 2019 |
| BB Health LAB Limited | Manufacturing | 2025 |
| BB Lighting Design Ltd | Arts & recreation | 2026 |
| BB Stag Properties Limited | Real estate | 2024 |
| BB Supreme Kitchen Ltd | Hospitality | 2025 |
| Bb's Executive Ltd | Transport & logistics | 2014 |
| Bb/Ah Labs Limited | Information & communication | 2026 |
| BB2 Furnishings Ltd | Wholesale & retail | 2019 |
| BBA Somerset Ltd | Other services | 2018 |
| BBA UK Service's Ltd | Transport & logistics | 2025 |
| Bbbn Limited | Extraterritorial | 2015 |
| BBD Trading Ltd | Hospitality | 2026 |
| Bbdc Limited | Health & social care | 2009 |
| Bbdg Vector Limited | Administrative & support | 2025 |
| BBF Interiors Limited | Construction | 2015 |
| Bbfb Limited | Hospitality | 2012 |
| BBG Topco Limited | Professional & scientific | 2004 |
| BBH Private Capital Advisory Ltd | Professional & scientific | 2026 |
| Bbirl Ltd | Wholesale & retail | 2025 |
| BBJ & K Properties Limited | Real estate | 2026 |
| Bbj&K (Holdings) Ltd | Financial services | 2018 |
| Bbj&K Ltd | Professional & scientific | 2016 |
| Bbjdd Therapy Limited | Health & social care | 2022 |
| BBK Medical Ltd | Professional & scientific | 2016 |
| BBN Courier Company Limited | Transport & logistics | 2019 |
| BBP Express Ltd | Wholesale & retail | 2018 |
| BBQ Hospitality 1 Limited | Hospitality | 2024 |
| BBQ HUT 1 Ltd | Hospitality | 2025 |
| BBQ HUT Brum Ltd | Hospitality | 2024 |
| BBQ Steak House Limited | Hospitality | 2020 |