| BJ & JD Properties Ltd | Real estate | 2020 |
| BJ Management Limited | Professional & scientific | 2015 |
| Bjd.Global Limited | Financial services | 2021 |
| BL Supervision Ltd | Professional & scientific | 2026 |
| Blaar Ltd | Health & social care | 2025 |
| Black Jade Property Investments Ltd | Real estate | 2023 |
| Black Pelican Group Ltd | Hospitality | 2026 |
| Black Pennell LLP | | 2012 |
| Blackburn Symphony Orchestra Productions Limited | Arts & recreation | 2017 |
| Blackcaviar Ventures Ltd | Hospitality | 2020 |
| Blackhill Apartments Ltd | Construction | 2018 |
| Blackmanmarketing Limited | Information & communication | 2023 |
| Blackpool Auto Electrics Limited | Wholesale & retail | 2003 |
| Blackpool Builders Merchants Limited | Wholesale & retail | 2017 |
| Blackpool Coach Services Limited | Manufacturing | 2006 |
| Blackpool Demo Limited | Construction | 2018 |
| Blackpool Distillery Company Ltd | Manufacturing | 2019 |
| Blackpool Reptiles and Aquatics Ltd | Wholesale & retail | 2018 |
| Blackpool Road (Ansdell) Management Company Limited | Households | 2024 |
| Blacksmith Hollow Limited | Information & communication | 2022 |
| Blaxons Ltd | Construction | 2025 |
| BLC Property Holdings Ltd | Real estate | 2024 |
| Bloomsberry Holdings Limited | Financial services | 2017 |
| Bloomsberry Properties Limited | Real estate | 2017 |
| Blossom and Pearl Holdings Limited | Financial services | 2020 |
| Blossom and Pearl Investments Limited | Financial services | 2020 |
| Blue FOX Developments Ltd | Real estate | 2017 |
| Blue Hart Properties Ltd | Real estate | 2018 |
| Blue Noise Event Production Ltd | Administrative & support | 2022 |
| Blue Sky Incorporation Ltd | Information & communication | 2014 |
| Blue Sky Research Limited | Professional & scientific | 2000 |
| Blue Sowena Propert Limited | Real estate | 2021 |
| Blueinca Studios Limited | Information & communication | 2000 |
| Bluespot Ltd | Health & social care | 2004 |
| BM Furniture Ltd | Wholesale & retail | 2016 |
| BMS Event Medics Ltd | Other services | 2019 |
| BOB Smith Consulting Services Limited | Professional & scientific | 2025 |
| Bobelle Limited | Real estate | 2019 |
| Boden Autohaus UK Ltd | Wholesale & retail | 2026 |
| Body Strong Fitness Coaching Ltd | Hospitality | 2020 |
| Bollin Waters Limited | Administrative & support | 2016 |
| Bonixo Little Projects Limited | Real estate | 2016 |
| Bonjuk Ltd | Hospitality | 2025 |
| Book Bean and Ice Cream Ltd | Hospitality | 2019 |
| Borders K9 Support Limited | Other services | 2014 |
| Borgee Property Ltd | Real estate | 2025 |
| Bornite Solutions Limited | Professional & scientific | 2007 |
| Boss Hits (UK) Ltd | Wholesale & retail | 2026 |
| Boutique 84 Clothing/Homeware Ltd | Wholesale & retail | 2021 |
| Bowland Animal Experience Limited | Agriculture & fishing | 2014 |
| Boxed Liverpool Limited | Transport & logistics | 2023 |
| Boxstar Creative Ltd | Wholesale & retail | 2018 |
| BP Weeton Land Limited | Construction | 2020 |
| Brainwave Mentoring Ltd | Education | 2023 |
| Brandon Catering Services Ltd | Hospitality | 2024 |
| Breathe in Wellbeing Ltd | Other services | 2023 |
| Brec Properties Ltd | Real estate | 2016 |
| Breeze Blackpool Ltd | Hospitality | 2021 |
| Brennand Property LLP | | 2005 |
| Brewery Dispense Installations Ltd | Manufacturing | 2016 |
| Brewery Leasing Limited | Hospitality | 2011 |
| Brickpulse Estates Ltd | Construction | 2025 |
| Bridal Directories Ltd | Professional & scientific | 2024 |
| Bridge Court Management (Lytham) Limited | Households | 2006 |
| Brimas Construction Limited | Construction | 2012 |
| Brinkstech Ltd | Professional & scientific | 2026 |
| Bristles & Paws Limited | Wholesale & retail | 2022 |
| BRK Presenting Limited | Information & communication | 2013 |
| Brodie & Marcel Arms Brothers Ltd | Real estate | 2021 |
| Bromley Road (ST. Annes-On-Sea) Management Company Limited | Households | 2001 |
| Brook Bridge Farm Limited | Real estate | 2021 |
| Brookes International Limited | Information & communication | 2017 |
| Brookes Supply Chain Solutions Limited | Information & communication | 2016 |
| Brooks Accountants Limited | Professional & scientific | 2013 |
| Brooks FD Limited | Extraterritorial | 2021 |
| Brooks Global Group Ltd | Extraterritorial | 2021 |
| Brooks UK Group Ltd | Extraterritorial | 2021 |
| Brookson (1224) Limited | Administrative & support | 2011 |
| BRS Electrical Services Limited | Construction | 2017 |
| Bsda Investments Ltd | Financial services | 2025 |
| Buena Casa Ltd | Real estate | 2020 |
| Building Battery Britain Ltd | Mining & quarrying | 2024 |
| Building Services (NW) Ltd | Construction | 2016 |
| Bunty Baines Limited | Real estate | 2025 |
| Burlington Court Residents Association Limited | Households | 1981 |
| Burn 'N' Violet International Limited | Wholesale & retail | 2022 |
| Busgo Investments Ltd | Real estate | 2024 |
| Business Continuity Training Limited | Education | 2008 |
| Business Wealth Academy Ltd | Extraterritorial | 2020 |
| Butty's Ltd | Wholesale & retail | 2010 |
| Buxton Water Holdings Ltd | Financial services | 2020 |
| Buxton Water Ltd | Administrative & support | 2000 |
| Buyphi Ltd | Wholesale & retail | 2025 |
| Buzz Drones Limited | Wholesale & retail | 2016 |
| Buzztalks Limited | Professional & scientific | 2003 |
| Byson Computers Limited | Professional & scientific | 1999 |
| Bytesphere Ltd | Information & communication | 2026 |
| C & L Property Limited | Real estate | 2003 |
| C C Harland Consultant Dermatologist Limited | Health & social care | 2022 |
| C.G. Turnbull Holdings Limited | Financial services | 2012 |