| BIRMZ3D Ltd | Wholesale & retail | 2026 |
| Birnam Flat Management Limited | Households | 1971 |
| Birnott Holistic Care Limited | Health & social care | 2023 |
| Biro Transport Limited | Transport & logistics | 2016 |
| Birou Transport Ltd | Manufacturing | 2022 |
| Birpal Ltd | Administrative & support | 2018 |
| Birria ST Limited | Hospitality | 2025 |
| Birring Capital Ltd | Administrative & support | 2022 |
| Birring Events Limited | Arts & recreation | 2025 |
| Birring Properties Ltd | Real estate | 2020 |
| Birth Pool Trading Limited | Wholesale & retail | 2006 |
| Birway Garage Limited | Wholesale & retail | 1973 |
| Biryani & Co Ltd | Extraterritorial | 2017 |
| Biryani Babai ( NOT Just a Biryani ) Ltd | Hospitality | 2026 |
| Biryani Castle Ltd | Hospitality | 2026 |
| Biryani Ghar Birmingham Ltd | Hospitality | 2025 |
| Biryani Guyz BHM Ltd | Hospitality | 2019 |
| Biryani Station Ltd | Hospitality | 2024 |
| Biryaniwala Birmingham Limited | Hospitality | 2023 |
| BIS Shavings Ltd | Manufacturing | 2024 |
| Bisc Group Ltd | Transport & logistics | 2022 |
| Bisc Tech Ltd | Information & communication | 2018 |
| Bish Bash Music Limited | Arts & recreation | 2013 |
| Bishop & Associates Limited | Professional & scientific | 2015 |
| Bishop & Co (Heating) Engineering Limited | Construction | 2009 |
| Bishop Double Glazing Ltd | Construction | 2024 |
| Bishop Tax Ltd | Administrative & support | 2014 |
| Bishop's Vehicle Preparation Ltd | Professional & scientific | 2024 |
| Bishops Castle Smile Ltd | Health & social care | 2025 |
| Bishops Cleeve Enterprises Limited | Hospitality | 2011 |
| Bishops Court Management (NO.3) Limited | Households | 1993 |
| Bishopsgate Care Services Limited | Real estate | 2008 |
| Bishopsgate House Management Company Limited | Households | 2009 |
| Bishopss Limited | Professional & scientific | 2015 |
| Bisko Wholesales Ltd | Wholesale & retail | 2022 |
| Bisma International Ltd | Wholesale & retail | 2024 |
| Bismaadh Ltd | Wholesale & retail | 2025 |
| Bismillah 786 Property Management Ltd | Households | 2025 |
| Bismillah Bees Ltd | Wholesale & retail | 2020 |
| Bismillah Bounty Ltd | Real estate | 2024 |
| Bismillah Bullring Halal Meat & Poultry Limited | Wholesale & retail | 2014 |
| Bismillah Compliance Solutions Limited | Other services | 2017 |
| Bismillah Dastarkhwan Ltd | Hospitality | 2024 |
| Bismillah Delivery 6 Ltd | Transport & logistics | 2025 |
| Bismillah Domestic Services Limited | Administrative & support | 2018 |
| Bismillah Fast Food Ltd | Wholesale & retail | 2018 |
| Bismillah Fresh Fish and Seafood Ltd | Wholesale & retail | 2024 |
| Bismillah Funeral & Burial Committee Ltd | Other services | 2018 |
| Bismillah Goods Ltd | Wholesale & retail | 2025 |
| Bismillah Halal Meat & Chicken Ltd | Wholesale & retail | 2013 |
| Bismillah Halal Meat Ltd | Wholesale & retail | 2022 |
| Bismillah House Limited | Real estate | 2025 |
| Bismillah Housing Limited | Real estate | 2023 |
| Bismillah Investments Ltd | Real estate | 2020 |
| Bismillah Letting Limited | Real estate | 2025 |
| Bismillah Meat & Poultry Dudley Road Ltd | Wholesale & retail | 2015 |
| Bismillah Meat (West Midlands) Ltd | Wholesale & retail | 2025 |
| Bismillah Meat UK Ltd | Wholesale & retail | 2023 |
| Bismillah Nashta Point Ltd | Hospitality | 2026 |
| Bismillah National Halal Meat Ltd | Wholesale & retail | 2021 |
| Bismillah Poultry Ltd | Manufacturing | 2025 |
| Bismillah Properties Limited | Professional & scientific | 2000 |
| Bismillah Supermarket Limited | Wholesale & retail | 2021 |
| Bismillah Treaders Limited | Wholesale & retail | 2024 |
| Bison Energy & Controls Limited | Professional & scientific | 2013 |
| Bissell Wood Estate Limited | Agriculture & fishing | 2011 |
| Bissmaa Properties Ltd | Real estate | 2024 |
| Bistas Construction Ltd | Construction | 2009 |
| Bistaville Housing Limited | Real estate | 2025 |
| BIT of Glam Limited | Wholesale & retail | 2025 |
| Bita Aesthetics Clinic Ltd | Health & social care | 2025 |
| Bita Digger Hire Ltd | Construction | 2024 |
| Bita Wayz Ltd | Wholesale & retail | 2025 |
| Bitcom Ltd | Information & communication | 2023 |
| Bite & Juice Ltd | Hospitality | 2025 |
| Bite Hub Ltd | Hospitality | 2026 |
| Bite Spot Ltd | Hospitality | 2025 |
| Bitlance Group Ltd | Wholesale & retail | 2025 |
| Bitmon Ltd | Information & communication | 2026 |
| Bitnet Solutions Ltd | Information & communication | 2014 |
| Bitown Ltd | Hospitality | 2025 |
| Bitrack Ltd | Information & communication | 2014 |
| Bitron Digital Ltd | Information & communication | 2026 |
| Bitrona Ltd | Wholesale & retail | 2025 |
| Bits & Bobs (BHX) Ltd | Wholesale & retail | 2024 |
| Bits and Bobs Cash and Carry Ltd | Wholesale & retail | 2026 |
| Bits and Bobs Ltd | Wholesale & retail | 2025 |
| Bits of Sweet Stuff Limited | Hospitality | 2019 |
| Bitsight Limited | Information & communication | 2025 |
| Bitsnbobsguru Ltd | Wholesale & retail | 2024 |
| Bixwiz Ltd | Wholesale & retail | 2023 |
| Bixy House Ltd | Wholesale & retail | 2024 |
| BIZ Assist Accountants Limited | Professional & scientific | 2013 |
| BIZ Midlands Ltd | Administrative & support | 2017 |
| Bizaroux Consulting & Growth Ltd | Financial services | 2025 |
| Bizdotweb Ltd | Information & communication | 2024 |
| Bizglob Consultancy Ltd | Professional & scientific | 2010 |
| Bizhub Marketing Ltd | Professional & scientific | 2025 |
| Bizi Consultancy Ltd | Information & communication | 2019 |
| Bizmarkt Limited | Information & communication | 2023 |