| Best Booth Ltd | Administrative & support | 2023 |
| Best Holidays Limited | Administrative & support | 2021 |
| Best Laid Planning Ltd | Professional & scientific | 2024 |
| Best R US Ltd | Wholesale & retail | 2026 |
| Best Tech LAB Ltd | Wholesale & retail | 2026 |
| Besties Play Cafe Ltd | Arts & recreation | 2025 |
| Bestplace (Beta) Limited | Real estate | 2017 |
| Bestplace Limited | Hospitality | 2007 |
| Beth Aubin Limited | Financial services | 2025 |
| Bethches Limited | Professional & scientific | 2017 |
| Better Boundaries CIC | Health & social care | 2026 |
| Better Boundaries Online Limited | Education | 2025 |
| Bevere (Ombersley Road) Ltd | Construction | 2021 |
| Beverley Justine Ltd | Wholesale & retail | 2018 |
| Beyond Leamington Limited | Health & social care | 2021 |
| Beyond Logistics Ltd | Transport & logistics | 2023 |
| Beyond Mist Ltd | Wholesale & retail | 2023 |
| Beyond Mortgages Limited | Financial services | 2023 |
| Beyond Motors Ltd | Wholesale & retail | 2024 |
| Beyond Oxford Limited | Health & social care | 2023 |
| Beyond Skin Aesthetics Limited | Health & social care | 2024 |
| Beyond Solihull Limited | Health & social care | 2021 |
| Beyond Worcester Limited | Health & social care | 2022 |
| BFW Financial Services Limited | Financial services | 2020 |
| BGC (Bristol) Limited | Hospitality | 2025 |
| BGJ Lettings Ltd | Real estate | 2025 |
| BGJ Mechanical Solutions Ltd | Construction | 2025 |
| Bgrt Investments Limited | Professional & scientific | 1965 |
| BH Catering Ltd | Hospitality | 2026 |
| BH GAS Ltd | Professional & scientific | 2024 |
| BH Plumbing & GAS Ltd | Construction | 2026 |
| Bhatti & Bhatti Ltd | Real estate | 2011 |
| BHM Smart Cars Ltd | Transport & logistics | 2022 |
| Bhna Property Services Ltd | Real estate | 2025 |
| Bhogal Enterprize Ltd | Other services | 2017 |
| Bhogal Medical Services Limited | Health & social care | 2016 |
| Bhohie Optical Limited | Health & social care | 2019 |
| BHS Energy Solutions Ltd | Construction | 2025 |
| BHX Property Group Ltd | Real estate | 2026 |
| Bible Believers Birmingham Fellowship Limited | Health & social care | 2026 |
| Bible Believers Birmingham Tabernacle Ltd | Health & social care | 2026 |
| Bicano Software Ltd | Information & communication | 2025 |
| Bick Abode Limited | Real estate | 2025 |
| Bick Construction Limited | Construction | 2021 |
| Bick Property Limited | Real estate | 2021 |
| Bickenhill Village Community 2020 Limited | Extraterritorial | 2020 |
| Bickenhill Village Limited | Real estate | 2020 |
| Bickerscourt Wellbeing CIC | Health & social care | 2026 |
| Bidability (JMS) Ltd | Professional & scientific | 2019 |
| Bidbur Limited | Construction | 1944 |
| Bidwell Webber De-Pons Limited | Real estate | 2007 |
| Big Bitez Ltd | Hospitality | 2019 |
| Big City Partners Ltd | Information & communication | 2024 |
| Big Hair Don'T Care Ltd | Other services | 2019 |
| Big Imaging Limited | Information & communication | 2009 |
| Big Time Rocque Ltd | Administrative & support | 2026 |
| Bijal Optics Limited | Wholesale & retail | 2022 |
| Bike Skills Academy Limited | Education | 2022 |
| Bilbrough and Sons Limited | Construction | 2022 |
| BIM Support Ltd | Professional & scientific | 2018 |
| Bimnavitech Ltd | Information & communication | 2025 |
| Bimshire Electrical Services Limited | Construction | 1999 |
| BINC42 Healthcare Limited | Health & social care | 2022 |
| Binswood Mews Property Management Company Limited | Households | 2015 |
| Bioclear Matrix UK Ltd | Wholesale & retail | 2019 |
| Biogas OPS 1 Limited | Energy | 2024 |
| Biogas OPS 3 Limited | Energy | 2024 |
| Biogas OPS 4 Limited | Energy | 2024 |
| Biogas OPS 5 Limited | Energy | 2024 |
| Biogas OPS 6 Limited | Energy | 2026 |
| Biogas OPS 7 Limited | Energy | 2026 |
| Biosite Security Ltd | Administrative & support | 2015 |
| Biosite Systems Limited | Manufacturing | 2010 |
| Bipel Group PLC | Professional & scientific | 1981 |
| Bipepa Ltd | Administrative & support | 2025 |
| Birchwood Associates Limited | Professional & scientific | 2015 |
| Bird & Bird Properties Ltd | Real estate | 2024 |
| Bird Family Investments Limited | Financial services | 2020 |
| Bird in Hand Court Limited | Real estate | 2017 |
| Bird Property Developments Limited | Real estate | 2020 |
| Biri Foods Ltd | Manufacturing | 2026 |
| Birkam Property Group Limited | Real estate | 2019 |
| Birmingham & Solihull Rugby Football Club Limited | Arts & recreation | 2018 |
| Birmingham Accommodation Ltd | Hospitality | 2014 |
| Birmingham and Solihull Construction Training Centre Limited | Construction | 2013 |
| Birmingham Asphalt & Paving Limited | Construction | 1985 |
| Birmingham Blitz Dames Limited | Arts & recreation | 2014 |
| Birmingham Boiler Repairs Ltd | Construction | 2020 |
| Birmingham Boiler Servicing Ltd | Construction | 2025 |
| Birmingham Central Surface Repair Ltd | Construction | 2018 |
| Birmingham City Volleyball Ltd | Arts & recreation | 2023 |
| Birmingham Civil Service RFC Limited | Arts & recreation | 2019 |
| Birmingham Composite Doors Ltd | Manufacturing | 2019 |
| Birmingham Construction & Plant Limited | Construction | 2021 |
| Birmingham Contact Centre Ltd | Extraterritorial | 2021 |
| Birmingham Dogs Home (Trading) Limited | Professional & scientific | 2018 |
| Birmingham Dogs Home(The) | Professional & scientific | 1960 |
| Birmingham Energy Engineering Solutions Ltd | Professional & scientific | 2024 |
| Birmingham Epcs Limited | Other services | 2025 |
| Birmingham Exiles RFC Ltd | Arts & recreation | 2012 |