| Bear Cottage Properties Ltd | Financial services | 2024 |
| Bearshay Barns Driveways Ltd | Professional & scientific | 2020 |
| Becky Borhara Speech and Language Therapist Ltd | Health & social care | 2026 |
| Beerbohm Limited | Hospitality | 2020 |
| Beeston Properties 2025 Limited | Financial services | 2025 |
| Beetles, Buses and Beyond Limited | Administrative & support | 2015 |
| Bell Lane Developments Ltd | Real estate | 2023 |
| Bellitas Limited | Manufacturing | 1989 |
| Belvedere Safety Consultancy Limited | Professional & scientific | 2000 |
| Bema Health & Fitness Services Ltd | Arts & recreation | 2021 |
| Bema Ventures Ltd | Health & social care | 2025 |
| BEN Bridges Ltd | Administrative & support | 2026 |
| Benito (Debs) Limited | Other services | 2016 |
| Bennetts Autocare Ltd | Wholesale & retail | 2021 |
| Bens Weddings Limited | Administrative & support | 2019 |
| Benson Midlands Limited | Wholesale & retail | 1960 |
| Bentley & BO Ltd | Wholesale & retail | 2015 |
| Beorma Construction Ltd | Construction | 2022 |
| Bergason Property Services Ltd | Real estate | 2018 |
| Berkley Vittoria Independent Financial Services Limited | Financial services | 1991 |
| Berridge Estates Limited | Real estate | 2021 |
| Berridge Holdings Limited | Financial services | 2021 |
| Berridge Homes Limited | Other services | 2020 |
| Berridge Trading Limited | Real estate | 2008 |
| Bespoke Joinery (UK) Limited | Construction | 2011 |
| Bettaquip Limited | Wholesale & retail | 2004 |
| Better Project Limited | Professional & scientific | 2021 |
| Better Than B4 Ltd. | Professional & scientific | 2022 |
| Beverley Veneers Limited | Manufacturing | 1982 |
| BG Furnaces Limited | Manufacturing | 2019 |
| BG Property Enterprises Limited | Real estate | 2004 |
| BGF (Kings Norton) Limited | Wholesale & retail | 2012 |
| BH Remodelling Kitchens and Bedrooms Ltd | Manufacturing | 2018 |
| BHB Architects Limited | Extraterritorial | 1999 |
| BHB Cheltenham Limited | Professional & scientific | 2017 |
| BHB Group Holdings Ltd | Financial services | 2026 |
| BHB Ritchie and Ritchie Limited | Professional & scientific | 2021 |
| BHP Brickwork Ltd | Construction | 2026 |
| Bible Heroes Limited | Wholesale & retail | 2025 |
| Bica George Limited | Transport & logistics | 2016 |
| Big Bay Management Services Limited | Information & communication | 2007 |
| Big Van MAN Ltd | Transport & logistics | 2025 |
| BIG3SOLUTIONS Ltd | Professional & scientific | 2025 |
| Bigday Designs Limited | Manufacturing | 2004 |
| BIKE2LIFE CIC | Manufacturing | 2011 |
| Bilash Restaurant & Takeaway Limited | Hospitality | 2018 |
| Bilgo Limited | Information & communication | 2015 |
| Bill Todd Ltd | Professional & scientific | 2015 |
| Bilston Brook Accommodation Limited | Other services | 2021 |
| Bilston Brook Caravans Limited | Other services | 2021 |
| Bilston Brook Wedding Barn Limited | Other services | 2021 |
| Binghams Properties Limited | Real estate | 2025 |
| Binswood Court Limited | Other services | 1974 |
| Birch Contracts Developments Limited | Real estate | 2019 |
| Birch Contracts Group Limited | Financial services | 2019 |
| Birch Contracts Limited | Construction | 2017 |
| Birch Hosting Limited | Information & communication | 2008 |
| Birchforest Holdings Limited | Financial services | 2017 |
| Birchforest Limited | Construction | 1987 |
| Birchills Training Academy Ltd | Education | 2025 |
| Birchwood Ventures Limited | Professional & scientific | 2018 |
| Birmingham Dermatology Clinic Limited | Health & social care | 2012 |
| Birmingham Materials Handling Services Ltd | Professional & scientific | 2012 |
| Birmingham Physiotherapy Limited | Other services | 2013 |
| Bison in the Community Limited | Arts & recreation | 2011 |
| Bizgrowth Limited | Professional & scientific | 2018 |
| Bj's Catering Limited | Hospitality | 2013 |
| Bj's Wedding and Events Limited | Hospitality | 2015 |
| BJG Electrical Services Limited | Construction | 2019 |
| Bjornstrxng Ltd | Other services | 2023 |
| BK Media Ltd | Professional & scientific | 2023 |
| BKK Developments Ltd | Real estate | 2011 |
| Black Koffee Limited | Arts & recreation | 2022 |
| Black Manor Limited | Financial services | 2011 |
| Black Star Metals Ltd | Wholesale & retail | 2020 |
| Black Velvet Events Ltd. | Other services | 2015 |
| Blackbird Industries Ltd | Manufacturing | 2019 |
| Blackbrook Barns Limited | Real estate | 2023 |
| Blackbrook Farm Holdings Ltd | Construction | 2019 |
| Blackbrook Holdco Limited | Financial services | 2025 |
| Blackburn Arena Limited | Real estate | 2004 |
| Blackheart Creative Limited | Arts & recreation | 2019 |
| Blackstage Forensics Limited | Information & communication | 2009 |
| Blackstar Maintenance Limited | Construction | 2003 |
| Blackwood Property Advisors Ltd | Professional & scientific | 2016 |
| Blake Designs Limited | Information & communication | 2014 |
| Blank Pixel Limited | Information & communication | 2023 |
| BLG Tech Ventures Limited | Information & communication | 2023 |
| Bloop CRM Limited | Information & communication | 2026 |
| Bloor Property Investments Limited | Real estate | 2021 |
| Blossomfield Estates Ltd | Financial services | 2021 |
| BLU Dog Consultants Ltd | Administrative & support | 2025 |
| Blue Footprint Ltd | Information & communication | 2005 |
| Blue Provident Limited | Professional & scientific | 2011 |
| Blue Spec Limited | Administrative & support | 2015 |
| Blue Tiger Management Ltd | Real estate | 2025 |
| Bluebellinda Gifts Ltd | Wholesale & retail | 2022 |
| Blues Berries Limited | Health & social care | 2017 |
| Bluflame Design Limited | Professional & scientific | 2002 |
| Blush Haze Ltd | Hospitality | 2025 |