| Brown Decor Ltd | Construction | 2025 |
| Brown Hawk Ltd | Transport & logistics | 2020 |
| Brown's Couriers Ltd | Transport & logistics | 2018 |
| Brownhills Asphalt & Tarmac Limited | Construction | 2014 |
| Brownhills Carpentry Limited | Construction | 2016 |
| Brownhills Cars Ltd | Transport & logistics | 2016 |
| Brownhills Community Association Limited | Education | 1996 |
| Brownhills Express Ltd | Wholesale & retail | 2025 |
| Brownhills Glass Company Limited | Manufacturing | 1980 |
| Brownhills Investments Property Limited | Real estate | 2014 |
| Brownhills Tyres Fitting Ltd | Wholesale & retail | 2025 |
| Brownhills Welfare and Education Centre Limited | Education | 2024 |
| Brownshore Investments Limited | Financial services | 2017 |
| BRP Cars Limited | Wholesale & retail | 2021 |
| Brumpton & Saunders Ltd | Hospitality | 2022 |
| Brunch.Cheslynhay Ltd | Hospitality | 2023 |
| Bruno Catering Limited | Hospitality | 2025 |
| Bryan Transport Ltd | Transport & logistics | 2013 |
| Brynstore Industrial Limited | Real estate | 2021 |
| BS Decorating Limited | Construction | 2002 |
| BS Stone Supply Ltd | Construction | 2021 |
| BSB Couriers Limited | Transport & logistics | 2024 |
| BSC Diecasting & Finishing Ltd | Manufacturing | 2015 |
| Bsmi Limited | Information & communication | 2014 |
| BSN Electrical Ltd | Construction | 2023 |
| BSN Group Construction Limited | Construction | 2018 |
| BSN Group Fast Track Limited | Construction | 2019 |
| BSN Group Healthcare Limited | Construction | 2024 |
| BSN Group Holdings Ltd | Financial services | 2019 |
| BSN Group Management Limited | Professional & scientific | 2019 |
| BSN Midco Limited | Real estate | 2024 |
| BSS Properties Limited | Real estate | 2018 |
| Bsso Properties Limited | Real estate | 2023 |
| BSW Pallet Supplies Ltd | Manufacturing | 2013 |
| BTS Chester RD Sutton Ltd | Construction | 2025 |
| BTS Holdings Group Ltd | Construction | 2025 |
| BTS Investment Group Ltd | Real estate | 2024 |
| BTS MC Ltd | Construction | 2025 |
| BU & Associates Ltd | Health & social care | 2021 |
| Bubble T'Z Ltd | Hospitality | 2022 |
| Bubblebrush Ltd | Health & social care | 2020 |
| Buchanan Construction Management Ltd | Construction | 2018 |
| Buchanz Limited | Wholesale & retail | 2023 |
| Bucharest MIN Market Ltd | Wholesale & retail | 2024 |
| Bucharest Mini Store Ltd | Wholesale & retail | 2022 |
| Buddys American Pizza Ltd | Wholesale & retail | 2020 |
| Bude Squad Ltd | Administrative & support | 2025 |
| Bugsy' S Bar Ltd | Hospitality | 2024 |
| Build Hub Construction Ltd | Construction | 2025 |
| Build Your Dreams Walsall Limited | Construction | 2024 |
| Building Envelope and Window Solutions Limited | Manufacturing | 2024 |
| Building Performance Ltd | Other services | 2019 |
| Buildlec Maintenance & Construction Limited | Construction | 2009 |
| Builfinis Ltd | Construction | 2025 |
| Bukkies Limited | Information & communication | 2024 |
| Buky Orija Coaching Limited | Other services | 2014 |
| Bull Crafts Limited | Construction | 2024 |
| Bulldog Communications Ltd | Wholesale & retail | 2018 |
| Bullivant Holdings Limited | Administrative & support | 1982 |
| Bullivant Media Group Limited | Administrative & support | 2022 |
| Bump Sisters Limited | Education | 2026 |
| Bumydudu Ltd | Health & social care | 2022 |
| BUN & Peri Pizza Limited | Hospitality | 2024 |
| Bunbis Restaurant Limited | Hospitality | 2023 |
| Bundy Media Ltd | Information & communication | 2019 |
| Bunmee Thai Massage Ltd | Other services | 2024 |
| Buraq Ltd | Wholesale & retail | 2020 |
| Burbury Capital Ltd | Professional & scientific | 2019 |
| Burbury Group Limited | Professional & scientific | 2024 |
| Burbury Investments Limited | Real estate | 2024 |
| Burbury Limited | Real estate | 1959 |
| Burbury New Co Limited | Real estate | 2026 |
| Burbury RTM Company Limited | Households | 2025 |
| Burbury Ventures Limited | Professional & scientific | 2024 |
| Burdon Results Ltd | Professional & scientific | 2024 |
| Burger Bite Walsall Ltd | Hospitality | 2024 |
| Burger World Ltd | Hospitality | 2022 |
| Burgers BAB Ltd | Hospitality | 2022 |
| Burgershack Shelfield Limited | Wholesale & retail | 2024 |
| Burkey Estates Limited | Real estate | 2011 |
| Burmi Construction Ltd | Construction | 2023 |
| Burnside Legacy Limited | Administrative & support | 2016 |
| Burntwood Self Storage Containers Ltd | Other services | 2018 |
| Burrows & Lewis Limited | Professional & scientific | 2012 |
| Burrows Transport and Logistics Limited | Transport & logistics | 2020 |
| Burshah Constructions Ltd. | Construction | 2022 |
| Burton Cliff Healthcare Limited | Financial services | 2015 |
| Burton Hargreaves Capital Limited | Professional & scientific | 2012 |
| Business Bundle Ltd | Professional & scientific | 2025 |
| Business Flow Solutions Ltd | Professional & scientific | 2025 |
| Business News Group Ltd | Extraterritorial | 2021 |
| BUT2FLY CIC | Education | 2022 |
| Butterfly Allure Ltd | Other services | 2024 |
| Butts Fish Bar Ltd | Hospitality | 2024 |
| Butts Signature Cutz Limited | Other services | 2025 |
| Buxton Close 1963 Limited | Extraterritorial | 2014 |
| Buy to LEX Ltd | Real estate | 2016 |
| Buywindowsonline.Co.Uk Ltd | Manufacturing | 2011 |
| Buzz Burst Media Limited | Professional & scientific | 2025 |
| Buzz Wholesale Ltd | Wholesale & retail | 2013 |