| Ayton Continental Trade Ltd | Wholesale & retail | 2012 |
| Ayvi Technologies Ltd | Information & communication | 2022 |
| Ayyub Property Developers Ltd | Construction | 2024 |
| AZ Solution Services Ltd | Administrative & support | 2016 |
| AZ UK International Ltd | Hospitality | 2018 |
| Azalea Bar Limited | Hospitality | 2019 |
| Azer Renovations Ltd | Construction | 2025 |
| Azir & Sons Ltd | Real estate | 2025 |
| Aziz & Wali Co Ltd | Real estate | 2024 |
| Aziz Irha Limited | Transport & logistics | 2026 |
| Azka Impex (London) Limited | Wholesale & retail | 2016 |
| Aznova Ltd | Wholesale & retail | 2026 |
| AZQ Construction Services Ltd | Construction | 2019 |
| Azuk Jahan Ltd | Other services | 2020 |
| B & a Construct Ltd | Construction | 2018 |
| B & B Technologies Limited | Construction | 2014 |
| B & D Energy Limited | Energy | 2016 |
| B & U Investments Limited | Real estate | 2022 |
| B & Z Services Ltd | Wholesale & retail | 2018 |
| B and S Property Ltd | Real estate | 2022 |
| B C Diggerhire & Groundsworks Limited | Construction | 2019 |
| B C Maintenance Construction Ltd | Construction | 2021 |
| B Davis Building Services Ltd | Construction | 2025 |
| B J S Property Ltd | Construction | 2015 |
| B Kour Ltd | Wholesale & retail | 2025 |
| B Z Express Ltd | Wholesale & retail | 2023 |
| B&A Carpentery&Joinery Ltd | Manufacturing | 2023 |
| B&A TAH Ltd | Construction | 2015 |
| B&B Star Ltd | Hospitality | 2026 |
| B&D Reside Regeneration LLP | | 2015 |
| B&D Reside Weavers LLP | | 2017 |
| B&E Solutions Limited | Wholesale & retail | 2019 |
| B&G Rendering and Plastering Ltd | Professional & scientific | 2013 |
| B.G.H Engineers Ltd | Construction | 2015 |
| B.Kareem Consulting Limited | Information & communication | 2021 |
| B.S.3 Construction Limited | Construction | 2019 |
| B1 Building Construction Ltd | Construction | 2018 |
| B4ORE Platforms Ltd | Other services | 2026 |
| BA11MRN Homes Limited | Real estate | 2025 |
| Baasi Properties Limited | Real estate | 2019 |
| Babagon Group Limited(The) | Administrative & support | 1986 |
| Babagon Property Company Limited | Real estate | 1973 |
| Babas Auto & Hire Ltd | Administrative & support | 2025 |
| Baboo (Wholesale Meats) Ltd | Wholesale & retail | 1999 |
| BAC FIX Ltd | Construction | 2019 |
| Bacak & Manga Properties Ltd | Real estate | 2026 |
| Baejee Group Ltd | Wholesale & retail | 2026 |
| Bagagnan Limited | Transport & logistics | 2020 |
| Baggage Avenue Limited | Wholesale & retail | 2023 |
| Baggage Factory Limited | Wholesale & retail | 2008 |
| Baggage World Franchises Limited | Wholesale & retail | 2025 |
| Baggage World Limited | Wholesale & retail | 2013 |
| Bagita Ltd | Wholesale & retail | 2025 |
| Bagitude Ltd | Wholesale & retail | 2023 |
| Bahanov Courier Network Ltd | Transport & logistics | 2024 |
| Bahar Food Ltd | Hospitality | 2024 |
| Bahdinan Ltd | Other services | 2025 |
| Bait AL Abaya Ltd | Wholesale & retail | 2022 |
| Baitul Hamd | Other services | 2022 |
| Baks Ltd | Construction | 2006 |
| Baks Sport Limited | Arts & recreation | 2016 |
| Balaam & Daughters Ltd | Real estate | 2021 |
| Baldé Security Solutions Ltd | Administrative & support | 2024 |
| Baleo Ltd | Information & communication | 2023 |
| Balfort Properties Ltd | Real estate | 2019 |
| Balkan Bikes Limited | Wholesale & retail | 2025 |
| Balkan Bites Ltd | Hospitality | 2025 |
| Balkanism Limited | Information & communication | 2024 |
| Balloon Prop Style Limited | Wholesale & retail | 2019 |
| BALOG4 Ltd | Information & communication | 2025 |
| Baltic Furniture Instalations Ltd | Other services | 2010 |
| Baltic Logs Ltd | Wholesale & retail | 2023 |
| BAM Accountants Ltd | Professional & scientific | 2016 |
| Bamaras Properties Limited | Real estate | 2022 |
| Bamboo 54 Ltd | Hospitality | 2026 |
| Bamboo Pillows Ltd | Wholesale & retail | 2018 |
| Band Logistics Limited | Transport & logistics | 2002 |
| Bang on Trend Ltd | Wholesale & retail | 2023 |
| Bangali Pakghor Limited | Wholesale & retail | 2024 |
| Bangladesh Corporation UK Limited | Wholesale & retail | 2008 |
| Bangladesh Cultural Association London East Limited | Health & social care | 2025 |
| Bangladesh Development and Policy Centre Ltd | Other services | 2024 |
| Banolt CC Limited | Administrative & support | 2025 |
| Bansal Digital Commerce Ltd | Wholesale & retail | 2026 |
| Bansal Global Group Ltd | Wholesale & retail | 2025 |
| Bansal International Ventures Ltd | Wholesale & retail | 2026 |
| Bansal Nexus Ltd | Wholesale & retail | 2026 |
| Bansal Trade Solutions Ltd | Wholesale & retail | 2026 |
| Bantu Supplies & Maintenance Ltd | Construction | 2022 |
| Banyan Wills and Estate Planning Limited | Professional & scientific | 2026 |
| Baosa '80 | Other services | 2021 |
| Bar Application Limited | Professional & scientific | 2020 |
| Bar Restaurant TE Sheta Ltd | Hospitality | 2025 |
| Baraka Healthcare Services Ltd | Health & social care | 2014 |
| Baraka OIL & GAS Ltd | Wholesale & retail | 2022 |
| Barcosoft Tech Ltd | Wholesale & retail | 2025 |
| Bardhi Limited | Hospitality | 2012 |
| Barecon Limited | Real estate | 2011 |
| Bargain Autos Limited | Wholesale & retail | 2021 |
| Bargain Distro Limited | Wholesale & retail | 2026 |