| BPI Training & Education Ltd | Education | 2021 |
| BPL Developments Limited | Construction | 2019 |
| BPL Mining Limited | Mining & quarrying | 2018 |
| BPL Property Care Homes Limited | Public administration | 2018 |
| BPL Services Limited | Administrative & support | 2017 |
| BPL Training Limited | Health & social care | 2019 |
| BPM Holdings Ltd | Financial services | 2024 |
| BPM One Ltd | Hospitality | 2024 |
| Bppm Limited | Health & social care | 2026 |
| BPS1 Ltd | Real estate | 2018 |
| BPS2 Ltd | Real estate | 2024 |
| BQC Properties Limited | Real estate | 2025 |
| BR Baron Bars Limited | Hospitality | 2025 |
| BR Infotech Ltd | Information & communication | 2012 |
| BR Media Group Ltd | Professional & scientific | 2024 |
| BR Ophthalmics Ltd | Health & social care | 2025 |
| BR Pro Services Ltd | Hospitality | 2020 |
| BR UK Fried Chicken Limited | Hospitality | 2024 |
| BR Worcester Limited | Hospitality | 2024 |
| Braai Plate Limited | Hospitality | 2022 |
| Braai Spot Ltd | Hospitality | 2025 |
| Brabia Ltd | Information & communication | 2016 |
| Brabus Investments Ltd | Households | 2016 |
| Brac Homes Ltd | Real estate | 2024 |
| Brac Saajan Exchange Ltd | Financial services | 2008 |
| Brace Gymwear Ltd | Wholesale & retail | 2025 |
| Brace Housing Ltd | Hospitality | 2026 |
| Bracebridge Accountancy Limited | Professional & scientific | 2026 |
| Bracebridge Asset Management Ltd | Real estate | 2017 |
| Bracebridge Children Services Ltd | Health & social care | 2025 |
| Bracebridge Construction Ltd | Construction | 2026 |
| Bracebridge Design and Build Ltd | Real estate | 2021 |
| Bracebridge Engineering Limited | Manufacturing | 1977 |
| Bracebridge Homes Limited | Real estate | 2005 |
| Bracebridge Investments Ltd | Real estate | 2026 |
| Bracebridge Property Investments Ltd | Real estate | 2023 |
| Bracebridge Property Services Ltd | Real estate | 2025 |
| Braces Bakery Limited | Manufacturing | 1975 |
| Brachium Estates Limited | Real estate | 2019 |
| BRACI1 Limited | Information & communication | 2014 |
| Brackendale Homes Limited | Real estate | 2019 |
| Brackley Berry Ltd | Wholesale & retail | 2024 |
| Brackley Management Company Limited | Households | 2020 |
| Bradbery Limited | Construction | 2013 |
| Bradbourne Assets Limited | Professional & scientific | 2016 |
| Bradford DIY & Builders Merchant Limited | Wholesale & retail | 2018 |
| Bradford Street Catering LLP | | 2009 |
| Bradford Street Properties (Number 2) LLP | | 2016 |
| Bradford Street Resources LLP | | 2025 |
| Bradley & Cuthbertson LLP | | 2017 |
| Bradley 1ST Choice Medical Limited | Health & social care | 2022 |
| Bradley Ghosh Projects Limited | Professional & scientific | 2022 |
| Bradley Health Ltd | Construction | 2022 |
| Bradley Stoke Fish Bar Ltd | Hospitality | 2024 |
| Bradley White Ltd | Construction | 2025 |
| Bradley-Cabral Properties Ltd | Real estate | 2025 |
| Bradleybrownhair Ltd | Other services | 2023 |
| Bradleys Consultancy Services Ltd | Professional & scientific | 2022 |
| Bradnocks Contractors Limited | Construction | 2017 |
| Bradstone Sky Ltd | Wholesale & retail | 2020 |
| Brady Capital Group Limited | Financial services | 2026 |
| Brady Industries Limited | Extraterritorial | 1935 |
| Braemore Ltd | Real estate | 2021 |
| Brafco Trading Ltd | Wholesale & retail | 2019 |
| Braga Insulation Ltd | Construction | 2024 |
| Braich Property Sourcing Ltd | Administrative & support | 2025 |
| Braidzbrazy Ltd | Other services | 2021 |
| Brain & Waldron Limited | Other services | 1987 |
| Brain Ballers UK Limited | Education | 2024 |
| Brain Matters Bmuk Limited | Administrative & support | 2018 |
| Brain Sphere Ltd | Information & communication | 2026 |
| Brain TAG Limited | Wholesale & retail | 2025 |
| Brainberry Ltd | Professional & scientific | 2015 |
| Brainch Holdings Ltd | Construction | 2023 |
| Brainch Property Ltd | Real estate | 2025 |
| Brainmina Ltd | Health & social care | 2025 |
| Brainology Learning Limited | Education | 2019 |
| Brainstorm Marketing Limited | Professional & scientific | 2025 |
| Brainwave Investments Limited | Real estate | 2022 |
| Brainy Bunch After School Club Ltd | Education | 2025 |
| Brainy International Education Limited | Administrative & support | 2020 |
| Bram Holding Limited | Financial services | 2020 |
| Bram Propco Limited | Construction | 2023 |
| Bramac Limited | Financial services | 2025 |
| Bramble Way (Sutton Coldfield Management) Limited | Households | 2015 |
| Brambourne UK Ltd | Professional & scientific | 2017 |
| Brambrüesch Ltd | Professional & scientific | 2025 |
| Bramco Ltd | Wholesale & retail | 2025 |
| Bramcore Ltd | Information & communication | 2017 |
| Bramford (LW) Development Limited | Real estate | 2025 |
| Brammer Property Investments Limited | Real estate | 2019 |
| Brampton One Ltd | Hospitality | 2024 |
| Bramptons Autocentre Limited | Wholesale & retail | 1983 |
| Bran Transports Ltd | Transport & logistics | 2023 |
| Branch Metrics UK Ltd | Administrative & support | 2021 |
| Brand Agencies Ltd | Real estate | 2005 |
| Brand Awards Ltd | Administrative & support | 2023 |
| Brand by Ihsy Ltd | Wholesale & retail | 2026 |
| Brand Conspiracy Limited | Professional & scientific | 2011 |
| Brand Distributors Ltd | Wholesale & retail | 2023 |