| Bradwood Couriers Ltd | Transport & logistics | 2013 |
| Brady Estates (London) Limited | Real estate | 2009 |
| Brady's Door Services Limited | Professional & scientific | 2022 |
| Braegate Holdings Limited | Financial services | 2018 |
| Braegate Logistics Limited | Transport & logistics | 2020 |
| Braegate Produce Limited | Agriculture & fishing | 2013 |
| Braeside Mews Limited | Households | 1999 |
| Brailsford Dancewear Limited | Wholesale & retail | 2023 |
| Brailsford Shore Limited | Manufacturing | 2007 |
| Brain Holdings Limited | Real estate | 2024 |
| Brainvault Technologies Ltd | Information & communication | 2022 |
| Brainworks Consulting Ltd | Information & communication | 2013 |
| Braisher Safety Solutions Limited | Professional & scientific | 2015 |
| Bralesford Engineering Services Limited | Professional & scientific | 1998 |
| Bramble House (Derby) Management Company Limited | Households | 2006 |
| Bramble House Freehold Holdings Ltd | Households | 2018 |
| Bramcote Residents Management Company Limited | Households | 2025 |
| Bramdale Properties Limited | Real estate | 1996 |
| Bramdale Quality Developments Limited | Real estate | 2003 |
| Brampton Property Services Ltd | Construction | 2023 |
| Bramshall Meadows Estate Management Company Limited | Households | 2016 |
| Bramway Developments Ltd | Real estate | 2025 |
| Bramway Property Ltd | Real estate | 2025 |
| Bramwell Engineering Ltd | Construction | 2023 |
| Branch OFF Estates Limited | Real estate | 2024 |
| Branch OFF Tree Services Ltd | Administrative & support | 2017 |
| Brand Holdings Limited | Wholesale & retail | 2016 |
| Brand Vandals Ltd | Professional & scientific | 2019 |
| Branded G Productions Ltd | Information & communication | 2011 |
| Brandonblanefitness Ltd | Arts & recreation | 2023 |
| Branston Estates Ltd | Real estate | 2024 |
| Branston Leas Hollyhock Estate Management Company Limited | Households | 2016 |
| Branston Properties Limited | Real estate | 1994 |
| Brar Transport Limited | Transport & logistics | 2026 |
| Brasov 1 Ltd | Wholesale & retail | 2023 |
| Brass Homes Ltd | Construction | 2019 |
| Braudley & Buckley Ltd | Real estate | 1999 |
| Bravo Fleet Ltd | Wholesale & retail | 2022 |
| Bravvo UK Limited | Wholesale & retail | 2025 |
| Bray Farming & Forestry Ltd | Agriculture & fishing | 2024 |
| Brazil Property Management Limited | Real estate | 2024 |
| Brazilian Food Derby Limited | Hospitality | 2023 |
| Bread and Butter Cafe Ltd | Hospitality | 2021 |
| Breadsall Aviation Limited | Transport & logistics | 2016 |
| Breadsall Investments Limited | Professional & scientific | 2019 |
| Breadsall Properties Ltd | Real estate | 2025 |
| Breakfast Courier Limited | Hospitality | 2023 |
| Breakfast Services Limited | Hospitality | 2023 |
| Breakthrough Limited | Financial services | 2024 |
| Brealeybox Consulting Limited | Professional & scientific | 2013 |
| Brealeybox Holdings Ltd | Financial services | 2020 |
| Breastfeeding Lens Limited | Health & social care | 2012 |
| Breaston Building Services Limited | Construction | 2012 |
| Breaston Properties Maintenance & Lettings Limited | Real estate | 2023 |
| Breaston Removals Limited | Transport & logistics | 2025 |
| Breaston Van MAN Limited | Transport & logistics | 2024 |
| Breaston Wrap Around Care Ltd | Health & social care | 2023 |
| Brecknock Engineering Ltd | Manufacturing | 2016 |
| Bree Solutions Ltd | Information & communication | 2023 |
| Breedon BOW Highways Limited | Construction | 2015 |
| Breedon Bowen Limited | Professional & scientific | 2011 |
| Breedon Cement Limited | Mining & quarrying | 2012 |
| Breedon Colas Limited | Construction | 2022 |
| Breedon Group PLC | Financial services | 2023 |
| Breedon Group Services Limited | Administrative & support | 1992 |
| Breedon Hall Limited | Hospitality | 2013 |
| Breedon Holdings Limited | Professional & scientific | 2008 |
| Breedon Investments UK Limited | Financial services | 2024 |
| Breedon Midco Limited | Financial services | 2023 |
| Breedon Properties Limited | Extraterritorial | 2009 |
| Breedon Southern Limited | Extraterritorial | 2011 |
| Breedon Surfacing Solutions Limited | Extraterritorial | 1974 |
| Breedon Trading Limited | Mining & quarrying | 1919 |
| Breeze Consultancy Limited | Information & communication | 2007 |
| Breeze FM Limited | Administrative & support | 2025 |
| Breezelearning Limited | Administrative & support | 2014 |
| Bregazzi Rail Engineering Limited | Manufacturing | 2026 |
| Brelade Estates Ltd | Financial services | 2005 |
| Brelade Property Management Limited | Real estate | 2023 |
| Brello Services Limited | Manufacturing | 2018 |
| Brennan Medical Care Ltd | Health & social care | 2012 |
| Bres Construction Ltd | Construction | 2020 |
| Brett Frost Windows and Doors Ltd | Construction | 2024 |
| Brett Riley Limited | Construction | 2010 |
| Brett's Stamping Company Limited | Professional & scientific | 1898 |
| Brettingham Properties Ltd | Real estate | 2025 |
| Bretton Developments Derby Limited | Construction | 2019 |
| Brettstar Bars Ltd | Hospitality | 2026 |
| Breview Health Care Services Limited | Health & social care | 2016 |
| Brew Rentals Ltd | Households | 2024 |
| Brewhouse Pubs Ltd | Hospitality | 2020 |
| Brexy Ltd | Wholesale & retail | 2025 |
| Brian Kirk Sterilization Consultancy Group Ltd | Professional & scientific | 2019 |
| Brian Wood & Co Ltd | Professional & scientific | 2006 |
| Briar View (Shaw) Estate Management Company Limited | Households | 2022 |
| Brick and Beam (Derby) Limited | Construction | 2025 |
| Brick by Brick Property Developments Ltd | Construction | 2015 |
| Brick Lane Developments Limited | Construction | 2017 |
| Brick Makeover Limited | Administrative & support | 2022 |
| Brick Tint (UK) Limited | Construction | 2008 |