| Bookmerize Ltd | Information & communication | 2025 |
| Booshooz Limited | Wholesale & retail | 2005 |
| Booth Dispensers Limited | Manufacturing | 1999 |
| Booth Group Limited | Financial services | 2019 |
| Booth Heating & Plumbing Limited | Construction | 2024 |
| Boothwells Building Services Ltd | Construction | 2015 |
| Boramir Yachting Ltd | Extraterritorial | 2023 |
| Bordriggs Farm (Windermere) Limited | Hospitality | 2021 |
| Borrow Hague Ltd | Wholesale & retail | 2025 |
| Boults Vintage Clothing Ltd | Wholesale & retail | 2023 |
| Bounce and Play Blackpool Ltd | Administrative & support | 2025 |
| BOW Street Cafe Ltd | Hospitality | 2018 |
| Bowland Accounting Services Limited | Professional & scientific | 2020 |
| Bowland CC Limited | Wholesale & retail | 2025 |
| Bowland Country Park Ltd | Extraterritorial | 2023 |
| Bowland Escapes Ltd | Hospitality | 2020 |
| Bowland Gardens Management Company Limited | Households | 2020 |
| Bowland Property Ltd | Real estate | 2026 |
| Bowland Wildlife Park Ltd | Extraterritorial | 2024 |
| Bowling Shephard Ltd | Wholesale & retail | 2025 |
| Bowood Court Residents Association Limited | Households | 1999 |
| Bowthorpe Godric Ltd | Wholesale & retail | 2025 |
| Bowtique Birkenhead Ltd | Wholesale & retail | 2013 |
| Box Seat Records Limited | Arts & recreation | 2024 |
| Boxed Meals Catering Limited | Hospitality | 2021 |
| BPL Competitions Ltd | Other services | 2025 |
| BPL Fireworks Ltd | Wholesale & retail | 2025 |
| Bplt Estates Ltd | Real estate | 2024 |
| BPM Property Solutions Ltd | Real estate | 2025 |
| Bpool Bars Ltd | Hospitality | 2026 |
| BR Super Store Ltd | Wholesale & retail | 2026 |
| Brabins Fruit and VEG Ltd | Wholesale & retail | 2025 |
| Bradosty Ltd | Real estate | 2025 |
| Brahma Foods Limited | Hospitality | 2020 |
| Braithwaite Consultancy (Blackpool) Ltd | Information & communication | 2013 |
| Braithwaite Maddock Energy Limited | Professional & scientific | 2021 |
| Braithwaite Property Solutions Limited | Administrative & support | 2011 |
| Bramble Court Properties Ltd | Real estate | 2023 |
| Bramble House Hair and Beauty Limited | Other services | 2022 |
| Bramble Landscape Limited | Administrative & support | 2026 |
| Brambles Drives and Patios Ltd | Administrative & support | 2025 |
| Brambles Landscaping Ltd | Administrative & support | 2023 |
| Brand Fantastic Products Ltd | Wholesale & retail | 2018 |
| Brand IT Manufacturing Ltd | Wholesale & retail | 2025 |
| Branded Sky Consulting Limited | Information & communication | 2017 |
| Brandels Limited | Extraterritorial | 1965 |
| Brandon Nile Ltd | Wholesale & retail | 2025 |
| Brandswap Limited | Other services | 2022 |
| Brandy Consulting Ltd | Information & communication | 2021 |
| Brank Group Limited | Information & communication | 2025 |
| Branosera Limited | Information & communication | 2019 |
| Bravo Whisky Access Ltd | Construction | 2025 |
| Brayford Investments Group Ltd | Real estate | 2026 |
| Braz Consultancy Ltd | Information & communication | 2017 |
| BRB Altitude Services Ltd | Construction | 2022 |
| BRB IT Services Limited | Administrative & support | 2011 |
| Breach Legal Consulting Limited | Professional & scientific | 2017 |
| Breakthrough Technology Ltd | Information & communication | 2022 |
| Breck House Limited | Households | 1973 |
| Breeez Properties Ltd | Real estate | 2019 |
| Brekkie Group Limited | Hospitality | 2019 |
| Brewis Electrical and Ropes Limited | Construction | 2015 |
| Bri-Met Limited | Manufacturing | 2007 |
| Brian Alfred Associates Limited | Professional & scientific | 2005 |
| Brian Chapman Tiling Limited | Administrative & support | 2002 |
| Brian Herbert Software Ltd | Information & communication | 2019 |
| Brian Seedle Helicopters Limited | Manufacturing | 1997 |
| Bricks and Data Ltd | Real estate | 2020 |
| BRICKWORKNW1 Ltd | Construction | 2022 |
| Bridge Capital Group Limited | Financial services | 2026 |
| Bridge Close Apartments RTM Company Limited | Households | 2023 |
| Bridge Healthcare Solutions Ltd | Information & communication | 2024 |
| Bridle Lodge Apartments Ltd | Real estate | 2019 |
| Bridtek Limited | Information & communication | 2010 |
| Bridwell Company Limited | Agriculture & fishing | 2010 |
| Briefsandjocks.Com Ltd | Wholesale & retail | 2025 |
| Brigante Aviation Limited | Manufacturing | 2013 |
| Bright Barber Limited | Other services | 2022 |
| Bright Blue Hare Limited | Professional & scientific | 2016 |
| Bright Highways Limited | Extraterritorial | 1981 |
| Bright Horizons Ltd | Financial services | 2010 |
| Bright Property Developers Ltd | Financial services | 2020 |
| Bright Serviced Accommodation Ltd | Real estate | 2022 |
| Bright Spot Trading Limited | Wholesale & retail | 2020 |
| Brightech Services Limited | Construction | 2016 |
| Brighter Design Limited | Administrative & support | 2009 |
| Brighton Wills Ltd | Professional & scientific | 2023 |
| Brights Property Ltd | Real estate | 2006 |
| Brimelow's Service & MOT Centre Limited | Wholesale & retail | 1998 |
| Brines Consulting Limited | Financial services | 2018 |
| Brionson Flats Limited | Households | 1974 |
| Britall Baltic Ltd | Wholesale & retail | 2025 |
| Britania Innovations Ltd Ltd | Wholesale & retail | 2024 |
| Brittanyia Digital Media Ltd | Professional & scientific | 2021 |
| Brittanyia Renewable Energy Ltd | Energy | 2019 |
| BRL Excel Ltd | Construction | 2013 |
| BRM Pool Care Limited | Administrative & support | 2003 |
| Broadfield Court Management Company Limited | Households | 1983 |
| Broadfield Court RTM Company Limited | Households | 2022 |
| Broadgate Kerry Ltd | Wholesale & retail | 2025 |