| Blinds of Preston Ltd | Manufacturing | 2019 |
| Blink Creative Solutions Limited | Professional & scientific | 1997 |
| Blink Group Limited | Financial services | 2015 |
| Blink MCR Limited | Professional & scientific | 2015 |
| Bliss Pharma Ltd | Wholesale & retail | 2025 |
| Bliss Pharmacy Limited | Wholesale & retail | 2025 |
| BLK International Limited | Wholesale & retail | 2020 |
| Bllbas Group Ltd | Other services | 2024 |
| Blockchain Consulting Limited | Information & communication | 2018 |
| Blocwell Ltd | Construction | 2024 |
| Blog Preston Community Interest Company | Information & communication | 2013 |
| Blomstra Skin Limited | Other services | 2017 |
| Bloom Room (Formby) Limited | Administrative & support | 2017 |
| Bloom Wellbeing North West Ltd | Education | 2024 |
| Bloomhaven Care Ltd | Health & social care | 2026 |
| Blooming Home Textiles (UK) Co Ltd | Wholesale & retail | 2025 |
| Bloompage Ltd | Administrative & support | 2024 |
| Bloque 13 Ltd | Administrative & support | 2011 |
| Blos Development Limited | Information & communication | 2011 |
| Blossom Court Goosnargh Management Limited | Households | 2012 |
| Blossom Lane Gifts Limited | Wholesale & retail | 2014 |
| Blossom Mental Health Training Limited | Health & social care | 2018 |
| BLP Ltd | Hospitality | 2018 |
| Blrbox Limited | Information & communication | 2023 |
| BLU Iris Trans Ltd | Transport & logistics | 2020 |
| BLU Jellyfish Ltd | Professional & scientific | 2019 |
| BLU2 Architecture Limited | Professional & scientific | 2012 |
| Blue & Land Properties Ltd | Households | 2025 |
| Blue Acorn Training and Support Ltd | Education | 2020 |
| Blue Badger Lofts Limited | Construction | 2023 |
| Blue Badger Projects Limited | Construction | 2020 |
| Blue Beam Services Limited | Professional & scientific | 2021 |
| Blue Bill Ltd | Hospitality | 2026 |
| Blue CDM Limited | Administrative & support | 2019 |
| Blue Cherry Leisure Limited | Hospitality | 2004 |
| Blue Collar Conservatism Ltd | Other services | 2012 |
| Blue Crate Transport Ltd | Transport & logistics | 2025 |
| Blue Diamond Health Ltd | Health & social care | 2021 |
| Blue Feather Consulting Limited | Administrative & support | 2016 |
| Blue Fire Solutions Ltd | Construction | 2024 |
| Blue Flamingo Community Hub CIC | Health & social care | 2024 |
| Blue Hart Security Ltd | Administrative & support | 2025 |
| Blue Horizon Health Consulting Ltd | Professional & scientific | 2024 |
| Blue JAY Way Limited | Professional & scientific | 2020 |
| Blue Lens Investments Limited | Wholesale & retail | 2025 |
| Blue Mango Business Limited | Wholesale & retail | 2009 |
| Blue Moon Computers Limited | Wholesale & retail | 2018 |
| Blue Moon Consultants International Ltd | Professional & scientific | 2009 |
| Blue Moon Consultants Ltd | Professional & scientific | 2006 |
| Blue Moose Dance Company CIC | Arts & recreation | 2014 |
| Blue Moose Ltd | Education | 2017 |
| Blue Oak Art Limited | Construction | 2020 |
| Blue OLA Ltd | Other services | 2020 |
| Blue Poodle Ltd | Real estate | 2023 |
| Blue Richardson Consultants Ltd | Wholesale & retail | 2017 |
| Blue Skies Care Limited | Health & social care | 2025 |
| Blue Skies Gardening Services Limited | Administrative & support | 2014 |
| Blue Sky Dynamics Ltd | Information & communication | 2017 |
| Blue Sky Family Wealth Management Ltd | Financial services | 2024 |
| Blue Sky Growth Solutions Limited | Professional & scientific | 2019 |
| Blue Slate Fold (Residents) Limited | Hospitality | 2008 |
| Blue Square Group Consulting Limited | Professional & scientific | 2014 |
| Blue Square Group Property Limited | Real estate | 2016 |
| Blue Tongue Solutions Ltd | Information & communication | 2015 |
| Blue Vape Ltd | Wholesale & retail | 2025 |
| Blue Wren Group Limited | Financial services | 2021 |
| Blue Wren Limited | Information & communication | 2010 |
| BLUE3 (London) (Holdings) Limited | Professional & scientific | 2013 |
| BLUE3 (London) Limited | Construction | 2013 |
| Bluebelles Automotive Diagnostics Ltd | Wholesale & retail | 2019 |
| Bluebelles Engineering Design Ltd. | Professional & scientific | 2019 |
| Bluebird Aware CIC | Wholesale & retail | 2026 |
| Bluebird Express Limited | Administrative & support | 2014 |
| Bluebird Golf Sales Ltd | Wholesale & retail | 2025 |
| Bluebird Golf Supplies Ltd | Wholesale & retail | 2025 |
| Bluebird Interiors Ltd | Wholesale & retail | 2013 |
| Bluebird Trading Inc Ltd | Wholesale & retail | 2025 |
| Bluecrest Capital Holdings Ltd | Financial services | 2025 |
| Bluegen Projects Limited | Professional & scientific | 2020 |
| Bluemoon KG Limited | Professional & scientific | 2018 |
| Bluenilewash Ltd | Administrative & support | 2023 |
| Bluepeak Security Ltd | Information & communication | 2026 |
| Bluepoint (UK) Ltd | Extraterritorial | 2014 |
| Blueridge Properties Ltd | Other services | 2009 |
| Blueridge Properties NW Ltd | Real estate | 2018 |
| Bluerock Engineering Services Limited | Professional & scientific | 2026 |
| Blueside Photonics Limited | Professional & scientific | 2008 |
| Bluesky Media Ltd | Information & communication | 2025 |
| Bluesky Powered Access Limited | Professional & scientific | 2025 |
| Bluestone GTR Ltd | Administrative & support | 2022 |
| Bluewater Accountants Ltd | Professional & scientific | 2015 |
| Bluewater Group NW Limited | Professional & scientific | 2024 |
| Bluewater Trading Limited | Hospitality | 2026 |
| Bluezen Flow Limited | Wholesale & retail | 2025 |
| Blumineck Ltd | Information & communication | 2026 |
| Blundell Movers Ltd | Transport & logistics | 2024 |
| Blundells of Longton Ltd | Real estate | 2015 |
| Blunt Travel Ltd | Transport & logistics | 2025 |
| Blush & Bloom Talent Limited | Professional & scientific | 2024 |
| Blyss Aroma Ltd | Manufacturing | 2025 |