| BMN Chester Road Limited | Construction | 2016 |
| BMN Dribuild Ltd | Real estate | 2019 |
| BMN Ducie Street Limited | Construction | 2017 |
| BMN Prime Ltd | Administrative & support | 2017 |
| Bmnm Ltd | Administrative & support | 2024 |
| BMP Electrical Services Ltd | Professional & scientific | 2016 |
| Bmr+T Limited | Administrative & support | 2025 |
| BN Electrical and Property Services Ltd | Construction | 2024 |
| Bnos Tsfas Ltd | Other services | 2000 |
| Bnos Yisroel Organisation Limited | Extraterritorial | 2005 |
| Bnos Yisroel School Manchester | Education | 2009 |
| BNR Estates Ltd | Real estate | 2015 |
| BNS Mobile Phone Accessories Ltd | Wholesale & retail | 2023 |
| Bockmann Dentistry Ltd | Health & social care | 2018 |
| Boda IP Limited | Other services | 2017 |
| Boda Skins Limited | Wholesale & retail | 2014 |
| Bodhi Marketing Ltd | Professional & scientific | 2026 |
| Bodoali Ltd | Transport & logistics | 2018 |
| Body Boost Shop Limited | Wholesale & retail | 2025 |
| Body Mind Educate C.I.C. | Education | 2025 |
| Bodyshop Group Ltd | Wholesale & retail | 2025 |
| Bold Street New SPV Limited | Construction | 2019 |
| Bolf Group Limited | Construction | 2024 |
| Bolip Limited | Wholesale & retail | 2018 |
| Bolton Easy Lettings Limited | Hospitality | 2012 |
| Bolton Enterprise Limited | Extraterritorial | 2019 |
| Bolyem Ltd | Health & social care | 2021 |
| BOM Properties Holdings Limited | Real estate | 2020 |
| Bona Medical Ltd | Health & social care | 2024 |
| Bond Street Shoe Co (UK) Ltd | Wholesale & retail | 2017 |
| Bondcare (Darrington) Limited | Health & social care | 2019 |
| Bondcare (LONDON2) Limited | Health & social care | 2019 |
| Bondcore Limited | Professional & scientific | 2015 |
| Bonixo Ltd | Construction | 2013 |
| Bontempo Trading Ltd | Wholesale & retail | 2022 |
| Bookkeeping Solutions Ltd | Professional & scientific | 2025 |
| Bookshine Ltd | Professional & scientific | 2013 |
| Booths Farm Developments Limited | Construction | 2021 |
| Booze, Burn and Bloom Ltd | Manufacturing | 2018 |
| Boozemart Ltd | Wholesale & retail | 2018 |
| Boozy Buster (UK) Ltd | Wholesale & retail | 2017 |
| Bordiga Trading LLP | | 2025 |
| Boreb Associates UK Ltd | Professional & scientific | 2015 |
| Born Property Limited | Real estate | 2020 |
| Borshe Ltd | Real estate | 2011 |
| Borysmaft Ltd | Construction | 2025 |
| Borz Estates Ltd | Real estate | 2023 |
| Botos Van and Car Sales Ltd | Wholesale & retail | 2020 |
| Botraco Holdings Limited | Professional & scientific | 2010 |
| Botraco Limited | Professional & scientific | 1957 |
| Boubal Limited | Health & social care | 2023 |
| Boundary Edge Management Company Limited | Households | 2022 |
| Bountyrow Ltd | Wholesale & retail | 2011 |
| Bournemouth Estates NO. 2 Ltd | Other services | 2018 |
| Bournemouth Solutions Limited | Extraterritorial | 2021 |
| Bovine Klein Limited | Hospitality | 2017 |
| Bowens Solutions Limited | Professional & scientific | 2024 |
| Box IT Limited | Transport & logistics | 2018 |
| Boxmax Ltd | Wholesale & retail | 2003 |
| Boxygen Ltd | Construction | 2024 |
| Boyce Property Services Ltd. | Real estate | 2007 |
| BPP Care Limited | Administrative & support | 2014 |
| Bracha Crown Holdings Ltd | Financial services | 2023 |
| Bradley Manor Limited | Construction | 2015 |
| Bradshaw Media Ltd | Professional & scientific | 2023 |
| Braehead Capital Limited | Real estate | 2017 |
| Braehead Facility Services Ltd | Administrative & support | 2026 |
| Braehead Funding Solutions Ltd | Administrative & support | 2011 |
| Braiden Acoustics Limited | Professional & scientific | 2008 |
| Braidsneve Ltd. | Other services | 2025 |
| Brainbox Brand Solution Ltd | Information & communication | 2025 |
| Braintree Estates Limited | Extraterritorial | 2024 |
| Brainwave Partners Ltd | Professional & scientific | 2025 |
| Bramhope Beauty Ltd | Other services | 2019 |
| Branco 40 Chorlton Ltd | Real estate | 2022 |
| Branco Asset Holding Ltd | Real estate | 2025 |
| Branco Avenham Ltd | Real estate | 2025 |
| Branco Capital Ltd | Real estate | 2021 |
| Branco Flex Limited | Real estate | 2023 |
| Branco Real Estate Limited | Construction | 2020 |
| Branco Winckley Square Limited | Construction | 2022 |
| Brand MDS Ltd | Wholesale & retail | 2022 |
| Brand New Tube Ltd | Professional & scientific | 2021 |
| Branded Electronics Limited | Wholesale & retail | 2020 |
| Brandfilm Ltd | Real estate | 2011 |
| Brandlow Ltd | Other services | 2019 |
| Brandmefy Ltd | Information & communication | 2025 |
| Brandmos Ltd | Real estate | 2022 |
| Brandsaver (UK) Limited | Wholesale & retail | 2013 |
| Branicks Europe Limited | Real estate | 2025 |
| Branjotech Limited | Administrative & support | 2022 |
| Brantwood Ventures UK Limited | Real estate | 2022 |
| Braveleaf Ltd | Real estate | 2022 |
| Bravo Cafe Ltd | Hospitality | 2026 |
| Bravo Homes Ltd | Real estate | 2024 |
| Bravo Media Limited | Professional & scientific | 2024 |
| Bravo Spice Limited | Hospitality | 2023 |
| Braydon Estates Limited | Real estate | 2017 |
| Break Their Chains CIC | Health & social care | 2025 |
| Breakingbreadmanchester Ltd | Hospitality | 2021 |