| Brownstone Builders Ltd | Extraterritorial | 2011 |
| Brownxuaimeideretail Limited | Wholesale & retail | 2025 |
| Brows and Beyond Ltd | Other services | 2025 |
| Brows TFR Ltd | Other services | 2021 |
| Brox Chippy Limited | Hospitality | 2026 |
| Broxs Chippy Ltd | Hospitality | 2026 |
| Broxtowe Local Enterprise Agency CIC | Administrative & support | 2025 |
| Broyle Ltd | Professional & scientific | 2020 |
| BRS Installations Ltd | Professional & scientific | 2017 |
| BRS International Limited | Information & communication | 2007 |
| BRS Visual Merchandising Ltd | Manufacturing | 2019 |
| BRS Warehousing and Distribution Ltd | Transport & logistics | 2018 |
| Brsl Estates Ltd | Real estate | 2024 |
| BRT Engineering Limited | Construction | 2021 |
| BRU Studio Limited | Information & communication | 2021 |
| Bru-C Music Limited | Arts & recreation | 2020 |
| Brubo Ltd | Information & communication | 2025 |
| Bruce Asbestos Limited | Information & communication | 2024 |
| Bruce Fulton Ltd | Information & communication | 2025 |
| Bruce Holdings (Midlands) Limited | Real estate | 2022 |
| Bruce Moult and Associates Limited | Professional & scientific | 2001 |
| Bruce Thornton Advisory Ltd | Professional & scientific | 2009 |
| Bruce’S Driver Hire Ltd | Transport & logistics | 2024 |
| Bruin Services Limited | Professional & scientific | 2017 |
| Brulogistics Limited | Transport & logistics | 2021 |
| Brumeclo Ltd | Manufacturing | 2025 |
| Bruno and Watson Limited | Real estate | 2024 |
| Bruno Automotive Ltd | Wholesale & retail | 2024 |
| Brunsdon Financial Services Holdings Limited | Extraterritorial | 2016 |
| Brunsdon Financial Services Limited | Financial services | 1997 |
| Brunswick Cafe Limited | Hospitality | 2024 |
| Brunswick Road Property Management Ltd | Households | 1997 |
| Bruspace Ltd | Education | 2017 |
| Bryad Print Finishing Services Limited | Manufacturing | 1982 |
| Bryan Salmon Building Services Limited | Construction | 2024 |
| Bryans Building Solutions Limited | Construction | 2017 |
| Bryans Homes Ltd | Households | 2026 |
| Brydon Estates Limited | Real estate | 1999 |
| Bryline Properties Ltd | Extraterritorial | 2024 |
| Brylou Accounts Limited | Professional & scientific | 2003 |
| Brynford Villas RTM Company Ltd | Households | 2020 |
| Brystewood Architectural Joinery Limited | Construction | 1996 |
| BS Care Providers Ltd | Health & social care | 2022 |
| BS Gym Limited | Arts & recreation | 2010 |
| BS Handling Systems Ltd. | Administrative & support | 2009 |
| BS SEO Services Ltd | Information & communication | 2025 |
| BS Shakes Limited | Hospitality | 2026 |
| BS UK Services Ltd | Administrative & support | 2016 |
| BS8888 Limited | Administrative & support | 2024 |
| BSA Nottingham Limited | Construction | 2015 |
| BSA Property Group Limited | Real estate | 2026 |
| BSB Enterprises Ltd | Real estate | 2022 |
| BSC Boyles Limited | Construction | 2017 |
| BSC FIN Limited | Other services | 2022 |
| BSC Nottingham Ltd | Wholesale & retail | 2026 |
| Bschahalhouseing Ltd | Real estate | 2021 |
| Bsconstructionltd Ltd | Construction | 2021 |
| BSK Fried Chicken Limited | Hospitality | 2025 |
| BSP (South Yorkshire) Ltd | Real estate | 2023 |
| BSP Capital Ltd | Real estate | 2023 |
| BSP East Mids Group Ltd | Financial services | 2026 |
| BSP Group Investments Limited | Financial services | 2022 |
| BSP Health Ltd | Health & social care | 2017 |
| BSP Holdings Ltd | Financial services | 2023 |
| BSS Examiner Ltd | Manufacturing | 2022 |
| BSS Media Co Limited | Professional & scientific | 2018 |
| BT & D Limited | Health & social care | 2022 |
| BT Cars Ltd | Administrative & support | 2025 |
| BT Wall Ltd | Hospitality | 2022 |
| Bt&O Ltd | Real estate | 2025 |
| BTF Industries Limited | Information & communication | 2020 |
| BTL Consultants Ltd | Information & communication | 2012 |
| Btodd Ltd | Transport & logistics | 2016 |
| Btor Management Limited | Financial services | 2020 |
| BTP Capital Ltd | Real estate | 2024 |
| BTP Wholesale Trailer Parts Ltd | Wholesale & retail | 1994 |
| BTS &Co Ltd | Financial services | 2025 |
| BTS London Limited | Construction | 2013 |
| Btst Osteopathy Limited | Health & social care | 2019 |
| BUB Limited | Information & communication | 2001 |
| Bubba Holdings Ltd | Financial services | 2025 |
| Bubbek Limited | Wholesale & retail | 2024 |
| Bubble House Hire Ltd | Arts & recreation | 2024 |
| Bubble IT Solutions Limited | Information & communication | 2006 |
| Bubble Korner Ltd | Hospitality | 2025 |
| Bubble Rocks Limited | Professional & scientific | 2022 |
| Bubbles (Derby) Ltd | Arts & recreation | 2007 |
| Bubbles Boutique Limited | Wholesale & retail | 2003 |
| Bubbles Launderette (Long Eaton) Limited | Other services | 2013 |
| Bubbletree Limited | Real estate | 2015 |
| Bubbly Toys Ltd | Wholesale & retail | 2025 |
| Bublhub Ltd | Information & communication | 2024 |
| Bubys Cabs Limited | Transport & logistics | 2023 |
| Buck Bros Roofing Services Ltd | Construction | 2025 |
| Buck Security Services Ltd | Administrative & support | 2025 |
| Buckden Marina Limited | Arts & recreation | 2006 |
| Buckenham & Co. Ltd | Professional & scientific | 2014 |
| Buckingham Engineering Ltd | Manufacturing | 2010 |
| Buckland Psychology Limited | Education | 2021 |
| Buckle Barrister Ltd | Professional & scientific | 2020 |