| Betty's Property Management Ltd | Real estate | 2018 |
| Beyond (Midlands) Limited | Other services | 2024 |
| Beyond Business Finance Limited | Extraterritorial | 2026 |
| Beyond Talent Solutions Limited | Administrative & support | 2025 |
| Bfam Properties Ltd | Real estate | 2018 |
| Biddles Plumbing and Heating Limited | Construction | 2024 |
| Bier Brucke German Imports Limited | Wholesale & retail | 2025 |
| Big Licks RC Limited | Wholesale & retail | 2025 |
| Bigharryglascote Ltd | Hospitality | 2024 |
| Bigruss Services Ltd | Construction | 2018 |
| Bike TEC Motorcycles Limited | Wholesale & retail | 1998 |
| Billionaires Club Ltd | Information & communication | 2024 |
| Binley Drake Consulting Limited | Professional & scientific | 2009 |
| Bioscale Talent Partners Ltd | Administrative & support | 2024 |
| Birch Coppice Sports and Social Club Limited | Hospitality | 2008 |
| Birchmoor(St John's) Community Interest Company | Other services | 2013 |
| Birchwood Pre-School & Afterschool Club Ltd | Education | 2024 |
| Birmingham Aesthetic Rooms Ltd | Health & social care | 2014 |
| Birmingham Luxury Travel Ltd | Administrative & support | 2023 |
| Birmingham NET Zero Limited | Professional & scientific | 2020 |
| Birmingham Orthoknee Clinic Limited | Health & social care | 2024 |
| Biryani & Curry Hub Limited | Hospitality | 2025 |
| Bitab Ltd | Professional & scientific | 2020 |
| Bitter and Sweet Tamworth Limited | Hospitality | 2019 |
| Bjre Limited | Manufacturing | 2022 |
| BK Entertainment Services Limited | Professional & scientific | 2025 |
| BK GAS and Plumbing Ltd | Construction | 2020 |
| Black Book Consulting Ltd | Professional & scientific | 2020 |
| Black FOX Accounting Limited | Extraterritorial | 2024 |
| Black FOX Advisers Limited | Professional & scientific | 2022 |
| Black FOX Audit LLP | | 2024 |
| Blackbox Enterprises Limited | Professional & scientific | 2021 |
| Blackbrook Country Holdings Limited | Financial services | 2013 |
| Blackbrook Country Sports Limited | Arts & recreation | 2013 |
| Blackcoat Services Ltd | Information & communication | 2025 |
| Blackshore Consultancy Ltd | Professional & scientific | 2025 |
| Blacktype Digital Limited | Information & communication | 2012 |
| Blackwood Asset Management Limited | Extraterritorial | 2026 |
| Blackwood Bloodstock Limited | Extraterritorial | 2024 |
| Blackwood Capital Investments Limited | Extraterritorial | 2024 |
| Blackwood Estates Holdings Limited | Real estate | 2024 |
| Blackwood Estates Limited | Real estate | 2014 |
| Blackwood Property Investments Limited | Real estate | 2023 |
| Blades Hairdressing Limited | Other services | 2011 |
| Blake & Clark Developments Limited | Construction | 2021 |
| Blake & Sons Building Contractors Ltd | Construction | 2018 |
| Blase Lambert Consulting Limited | Other services | 2015 |
| BLK Group Limited | Transport & logistics | 2022 |
| Blockpro Limited | Education | 2025 |
| Blocksize Law Limited | Professional & scientific | 2023 |
| Bloom House Flowers Ltd | Wholesale & retail | 2026 |
| Blue Brick Stays Ltd | Real estate | 2026 |
| Blue Chip PFP Ltd | Administrative & support | 2016 |
| Blue Cube Logistics Solutions Limited | Information & communication | 2019 |
| Blue FOX Cyber Security Limited | Information & communication | 2016 |
| Blue Iris Capital Limited | Professional & scientific | 2023 |
| Blue Shack Property Limited | Real estate | 2024 |
| Blue Sky 23 Ltd | Construction | 2016 |
| Blue Sky Luxury Bathrooms Limited | Wholesale & retail | 2024 |
| Blue Skyers Limited | Professional & scientific | 2016 |
| Blue Wave Window Cleaning Ltd | Administrative & support | 2025 |
| Blueclair Inc Limited | Energy | 2014 |
| Bluesky Field Services Limited | Administrative & support | 2024 |
| Bluesky Metering Services Limited | Administrative & support | 2020 |
| Bluesky Metering Services U.K. LLP | | 2018 |
| Bluntside Barber Studio Limited | Other services | 2025 |
| Bluprint Health Ltd | Professional & scientific | 2022 |
| BMK Driver Ltd | Transport & logistics | 2025 |
| BMS HGV Maintenance Ltd | Wholesale & retail | 2022 |
| Boardsco Limited | Financial services | 2023 |
| Bodybeaut Contour Limited | Other services | 2024 |
| Bogdan Logistics Ltd | Administrative & support | 2019 |
| Bogdan-Lex Ltd | Wholesale & retail | 2022 |
| Bogdanb Ilie Ltd | Transport & logistics | 2021 |
| Boiye Goiye Ltd | Wholesale & retail | 2026 |
| Bold IT Tamworth LLP | | 2024 |
| Bold Registrations Limited | Wholesale & retail | 2005 |
| Boldmere I.T. Solutions Ltd. | Information & communication | 1993 |
| Bolehall Manor Club Limited | Hospitality | 1939 |
| Bolehall Swifts (2010) Limited | Administrative & support | 2009 |
| Bon's Event Trade Ltd | Wholesale & retail | 2025 |
| Bond Property Service Tamworth Ltd | Real estate | 2016 |
| Bondi Bars Ltd | Hospitality | 2019 |
| Bonehill Beauty Limited | Other services | 2024 |
| Bonehill Mill Ltd | Real estate | 2021 |
| Bonehill Mill Residential Ltd | Real estate | 2024 |
| Booki Health Ltd | Information & communication | 2026 |
| Books That Balance Limited | Professional & scientific | 2017 |
| Boop UN Limited | Real estate | 2023 |
| Boost My Local Rank Ltd | Information & communication | 2026 |
| Boost Print & Display Ltd | Manufacturing | 2021 |
| Boosted Bricks Ltd | Real estate | 2025 |
| Boothco Limited | Professional & scientific | 2020 |
| Borah Health Limited | Wholesale & retail | 2022 |
| Boris Utility Ltd | Construction | 2021 |
| Borthwick Enterprise Limited | Households | 2024 |
| Boss Fabrics Leicester Ltd | Manufacturing | 2018 |
| Bostock & Co. Property Ltd | Real estate | 2025 |
| Botrans Ltd | Transport & logistics | 2014 |
| Botterill Associates Limited | Financial services | 2005 |