| B.N. Kaushal Limited | Construction | 1981 |
| B.O.B. Stevenson Limited | Manufacturing | 2016 |
| B.O.E. Brush of Excellence Ltd | Construction | 2023 |
| B.O.T.I. Boat Limited | Wholesale & retail | 2018 |
| B.O.X Entertainment Ltd | Arts & recreation | 2018 |
| B.O.X Installations Ltd | Administrative & support | 2018 |
| B.P. Canty (Plumbing & Heating Services) Limited | Wholesale & retail | 1983 |
| B.P. Cunningham (Birmingham) Limited | | 1963 |
| B.P.L. Properties Limited | Real estate | 2013 |
| B.R. Industrial Personnel Limited | Construction | 2003 |
| B.R.M Import & Export Ltd | Wholesale & retail | 2012 |
| B.S. Birmingham Limited | Financial services | 2014 |
| B.S. Motors Limited | Manufacturing | 1994 |
| B.S. Plastics Limited | Manufacturing | 2014 |
| B.S.G. Builders Merchants Limited | Professional & scientific | 1993 |
| B.T.A. Structural Design Limited | Professional & scientific | 2002 |
| B.Z Improvements Ltd | Construction | 2022 |
| B1 Bespoke Limited | Wholesale & retail | 2017 |
| B1 Business Development Limited | Administrative & support | 2026 |
| B1 Capital Ltd | Real estate | 2026 |
| B1 Consultancy Services Limited | Professional & scientific | 2025 |
| B1 Developments Limited | Construction | 2015 |
| B1 Facility Maintenance Limited | Construction | 2018 |
| B1 Kwik FIX Ltd | Wholesale & retail | 2025 |
| B1 Logistics Limited | Transport & logistics | 2015 |
| B1 LUX Limited | Construction | 2025 |
| B1 Media Limited | Information & communication | 2017 |
| B1 MOT & Tyres Ltd | Wholesale & retail | 2025 |
| B1 Padthai Limited | Hospitality | 2017 |
| B1 Property Consultants Ltd | Professional & scientific | 2020 |
| B1 Smart Cars Ltd | Wholesale & retail | 2021 |
| B1 Topgear Motors Ltd | Wholesale & retail | 2021 |
| B10 Bakery Ltd | Manufacturing | 2025 |
| B10 Builders Limited | Construction | 2024 |
| B10 Enterprise Ltd | Financial services | 2022 |
| B13 AI Ltd | Information & communication | 2023 |
| B13 Properties Ltd | Real estate | 2017 |
| B15 2SS Ltd | Wholesale & retail | 2025 |
| B15 Media Limited | Information & communication | 2009 |
| B16 Express Limited | Wholesale & retail | 2025 |
| B17 Consultants Limited | Construction | 2019 |
| B17 Medics Limited | Health & social care | 2022 |
| B18 Bakery Ltd | Wholesale & retail | 2024 |
| B184HB Ltd | Hospitality | 2024 |
| B19 App Ltd | Hospitality | 2025 |
| B19 Bakery Ltd | Hospitality | 2022 |
| B1BURGERS Limited | Hospitality | 2025 |
| B1CLEAN Ltd | Administrative & support | 2025 |
| B1LIVING Ltd | Information & communication | 2022 |
| B2 Audit & Installation Limited | Construction | 2015 |
| B2 Automotive Components Limited | Manufacturing | 2002 |
| B2 Property (Midlands) Limited | Real estate | 2025 |
| B20 Event Services Ltd | Arts & recreation | 2010 |
| B21 Autos Ltd | Wholesale & retail | 2023 |
| B23 Customs Ltd | Wholesale & retail | 2025 |
| B23 Storage & Recovery Services Ltd | Transport & logistics | 2025 |
| B24 Phone Repair Ltd | Wholesale & retail | 2025 |
| B26 Autos 24 Ltd | Wholesale & retail | 2024 |
| B26 MOT Ltd | Administrative & support | 2019 |
| B262 Ltd | Hospitality | 2019 |
| B29 Property Management Ltd | Real estate | 2011 |
| B2B Consulting Group Ltd | Information & communication | 2019 |
| B2B Courier & Transport Ltd | Transport & logistics | 2024 |
| B2B Energy Doctor Limited | Professional & scientific | 2021 |
| B2B Europe Ltd | Professional & scientific | 2025 |
| B2B UK Supplier Ltd | Wholesale & retail | 2023 |
| B2BE Limited | Information & communication | 2003 |
| B2BG Services Limited | Information & communication | 2018 |
| B2BINVESTMENTS Ltd | Real estate | 2018 |
| B2BTRADECARD Limited | Professional & scientific | 2015 |
| B2C Finance Ltd | Financial services | 2009 |
| B2C-TECH Ltd | Information & communication | 2025 |
| B3 Pizza Ltd | Hospitality | 2023 |
| B31 Coffee Ltd | Hospitality | 2020 |
| B31 Spin CIC | Other services | 2025 |
| B33 Distribution Ltd | Transport & logistics | 2017 |
| B33 Takeaway Ltd | Hospitality | 2025 |
| B34 Developments Limited | Real estate | 2008 |
| B35 Limited | Hospitality | 2023 |
| B35 Warehouse Ltd | Real estate | 2024 |
| B356AJ Ltd | Administrative & support | 2024 |
| B36 Bargains Limited | Wholesale & retail | 2024 |
| B38 Spice Limited | Hospitality | 2021 |
| B3PL Ltd | Transport & logistics | 2025 |
| B4 Fire Protection Ltd | Construction | 2005 |
| B4 Joinery & Building Services Ltd | Construction | 2015 |
| B4 Parking Limited | Transport & logistics | 2011 |
| B46 Design Ltd | Professional & scientific | 2013 |
| B46 Properties Limited | Real estate | 2014 |
| B47 Consulting Ltd | Other services | 2021 |
| B4BUILD Security Ltd | Administrative & support | 2026 |
| B4C&PR Ltd | Information & communication | 2019 |
| B4U (90) Limited | Wholesale & retail | 2016 |
| B4U Group Public Limited Company | Real estate | 2003 |
| B4U Transport Limited | Transport & logistics | 2026 |
| B5 Holdings Ltd | Hospitality | 2025 |
| B5 Takeaway Ltd | Hospitality | 2024 |
| B5 Trading Ltd | Hospitality | 2025 |
| B6 Camden Drive Ltd | Financial services | 2025 |
| B6 Exhibition & Shopfitting Ltd | Administrative & support | 2019 |