| Bay View Burntisland Ltd | Hospitality | 2021 |
| Baylis Homes Ltd | Real estate | 2024 |
| Baymaan Chicken Ltd | Other services | 2024 |
| Bayt Digital Ltd | Information & communication | 2024 |
| Bayt Muhammad Academy | Education | 2011 |
| Baytana Ltd | Wholesale & retail | 2026 |
| BB Autographs Ltd | Other services | 2013 |
| BB Black Pearl Ltd | Hospitality | 2025 |
| BB Catering Supplies Ltd | Construction | 2013 |
| BB Chickaros Ltd | Hospitality | 2026 |
| BB Group of Properties Ltd | Construction | 2025 |
| BB Housing Ltd | Real estate | 2020 |
| BB Kicks Ltd | Wholesale & retail | 2022 |
| BB Motorhomes Limited | Administrative & support | 2022 |
| BB Shutters Ltd | Manufacturing | 2026 |
| Bb-Clean Ltd | Administrative & support | 2021 |
| BB01 Ltd | Hospitality | 2025 |
| BB1 Finance Ltd | Other services | 2017 |
| BB1 Nails Blackburn Ltd | Other services | 2022 |
| BB1 Products Ltd | Wholesale & retail | 2020 |
| BB1 Vapes Limited | Wholesale & retail | 2023 |
| BBB Grab Hire Ltd | Transport & logistics | 2020 |
| Bbcobcomms Limited | Information & communication | 2011 |
| BBF (Holdings) Limited | Professional & scientific | 2013 |
| Bbl/P Ltd | Professional & scientific | 2012 |
| Bbl/P Trustees Limited | Administrative & support | 2024 |
| Bburn Trading Ltd | Hospitality | 2024 |
| BCD Partners Ltd | Administrative & support | 2025 |
| Bcfm Ltd | Health & social care | 2023 |
| Bchl Developments Limited | Extraterritorial | 2016 |
| BCN Food UK Ltd | Hospitality | 2026 |
| BCN Grocers Limited | Wholesale & retail | 2024 |
| BDQ Holdings Ltd | Financial services | 2025 |
| BDR NW Ltd | Professional & scientific | 2026 |
| BE Dentastic Ltd | Health & social care | 2024 |
| BE Electrical NW Ltd | Construction | 2026 |
| BE Seen Advertising Ltd | Professional & scientific | 2021 |
| BE Smart Clothing Ltd | Wholesale & retail | 2010 |
| BE Strong EAT. Move. Live C.I.C. | Other services | 2016 |
| BE Study Wise Ltd | Education | 2021 |
| Beamers 2019 Ltd | Administrative & support | 2019 |
| Bean BAG Beads Limited | Manufacturing | 2021 |
| Beardwood Lawyers Limited | Professional & scientific | 2011 |
| Beauty Bar Group Limited | Wholesale & retail | 2025 |
| Beauty Bundle Ltd | Wholesale & retail | 2021 |
| Beauty Stop Ltd | Wholesale & retail | 2025 |
| BEAUTY2AMAZE Limited | Extraterritorial | 2024 |
| Becky's Bakery Ltd | Hospitality | 2022 |
| Become an Orange Group Limited | Information & communication | 2015 |
| Bedfords of Blackburn Limited | Administrative & support | 1984 |
| Bedroom Furniture Manufacturing Limited | Manufacturing | 2010 |
| BEE BEE Honey Ltd | Hospitality | 2026 |
| Beech Pharma Ltd | Health & social care | 2019 |
| Beechwood Properties BB Ltd | Real estate | 2025 |
| Bees Breakfast Limited | Hospitality | 2020 |
| Bees Seeds Group Limited | Financial services | 2019 |
| Bees Seeds Limited | Wholesale & retail | 2008 |
| Bee’S Brownies Limited | Hospitality | 2021 |
| Begum Foods Ltd | Manufacturing | 2025 |
| Belgrave Carpets Limited | Wholesale & retail | 1993 |
| Belgrave Home and Floors Limited | Wholesale & retail | 2017 |
| Belgrave Upholstry Ltd | Manufacturing | 2021 |
| Bella Biatza Ltd | Hospitality | 2019 |
| Bella K Fresh Ltd | Other services | 2024 |
| Bella L’Amour Events Limited | Other services | 2025 |
| Bella Medica Limited | Health & social care | 2017 |
| Bellaco Projects Ltd | Construction | 2026 |
| Bellco Holdings Limited | Professional & scientific | 2005 |
| Bellcurve Limited | Other services | 2019 |
| Belle VIE Investments Limited | Professional & scientific | 2022 |
| Belmont Agriculture Ltd | Agriculture & fishing | 2023 |
| Belmont Cottage Ltd | Real estate | 2025 |
| Belmont Fusion Ltd | Hospitality | 2025 |
| Belthorn Academy Primary School | Education | 2011 |
| Belvedere Property Holdings Limited | Construction | 2020 |
| BEN Lewis Tree Services Ltd | Agriculture & fishing | 2025 |
| BEN Newton Property Limited | Extraterritorial | 2024 |
| Benbadge Limited | Arts & recreation | 2011 |
| Benefit Mankind Ltd | Health & social care | 2019 |
| Bengal Masala Ltd | Hospitality | 2025 |
| Beniona Holdings Limited | Financial services | 2019 |
| BEP Industrial Supplies Limited | Wholesale & retail | 2005 |
| BEP IS Holdings Ltd | Financial services | 2025 |
| Berry Property Investments Limited | Real estate | 2013 |
| Beruni Ltd | Manufacturing | 2022 |
| Bespoke Bathroom Installs Ltd | Construction | 2021 |
| Bespoke Design and Construction Ltd | Construction | 2018 |
| Bespoke Photography Ltd | Information & communication | 2020 |
| Bespoke Quality Cleaning Services Ltd | Other services | 2014 |
| Bespoke Sofas Ltd | Manufacturing | 2019 |
| Best Destinations (Great Harwood) Ltd | Administrative & support | 2025 |
| Best One Superstore (UK) Ltd | Wholesale & retail | 2013 |
| Best Style Limited | | 1980 |
| Best Way Concrete Ltd | Manufacturing | 2023 |
| Bestbuddy Pets Ltd | Wholesale & retail | 2025 |
| Bestpac UK Ltd | Manufacturing | 2020 |
| Beth Blade and the Beautiful Disasters Ltd | Information & communication | 2022 |
| Better Bodies Blackburn Limited | Arts & recreation | 2021 |
| Better Bodies Ladies Blackburn Limited | Arts & recreation | 2021 |
| Better Bodies Massage Limited | Other services | 2021 |