| Blue Horrizon Ltd | Wholesale & retail | 2025 |
| Blue Hull Group Limited | Administrative & support | 2020 |
| Blue Lagoon Laundry Services Ltd | Other services | 2004 |
| Blue Line Auto Logistics Limited | Wholesale & retail | 2002 |
| Blue Lounge Bolton Limited | Hospitality | 2021 |
| Blue Nile Cafe Bolton Limited | Hospitality | 2024 |
| Blue Orange Group Ltd | Administrative & support | 2022 |
| Blue Orchard Consulting Limited | Administrative & support | 2012 |
| Blue Pearl Wholesale Ltd | Wholesale & retail | 2026 |
| Blue Penguin Ltd | Information & communication | 2022 |
| Blue Pond Limited | Real estate | 2020 |
| Blue Quarter Ltd | Real estate | 2011 |
| Blue Sky Consulting (NW) Ltd | Professional & scientific | 2016 |
| Blue Sky Properties (NW) Limited | Real estate | 2022 |
| Blue Sky’S Properties Limited | Real estate | 2026 |
| Blue Smart Solutions Ltd | Construction | 2022 |
| Blue Steel Beverages Ltd | Wholesale & retail | 2020 |
| Blue Stone Infrastructure Limited | Construction | 2023 |
| Blue Submarine Accounting Ltd | Professional & scientific | 2023 |
| Blue Tern Consulting Limited | Administrative & support | 2014 |
| Blue Water Investment Group Limited | Financial services | 2023 |
| Bluebell Buildings Limited | Real estate | 2017 |
| Bluebell Construction Solutions Limited | Construction | 2004 |
| Bluebell Consulting Limited | Professional & scientific | 2023 |
| Bluebell Real Estate Investment Ltd | Real estate | 2021 |
| Bluebells Charms and Gifts Limited | Wholesale & retail | 2025 |
| Bluebells Pottery Limited | Manufacturing | 2012 |
| Bluebox Communications Ltd | Information & communication | 2003 |
| Bluecommitlab Limited | Information & communication | 2023 |
| Blueent Limited | Wholesale & retail | 2025 |
| Blueflint Ltd | Professional & scientific | 2021 |
| Bluegreen Energy Ltd | Administrative & support | 2025 |
| Blueindale Limited | Real estate | 2004 |
| Bluelight UK Ltd | Wholesale & retail | 2006 |
| Bluemantle Developments Limited | Real estate | 2005 |
| BLUEPEAK168 Ltd | Hospitality | 2026 |
| Blueprint HI Prop 1 Limited | Real estate | 2024 |
| Blueprint Housing and Communities Project Ltd | Other services | 2025 |
| Blueprint Housing and Investments Ltd | Construction | 2023 |
| Blueprint Prop Co a Limited | Real estate | 2025 |
| Blueprint Prop Co B Limited | Real estate | 2025 |
| Blues Stable Software Limited | Extraterritorial | 2015 |
| Bluesilk Developments Limited | Real estate | 2005 |
| Bluestone TMS Limited | Professional & scientific | 2022 |
| Bluetech Distribution Ltd | Wholesale & retail | 2021 |
| Bluetech Traders Ltd | Wholesale & retail | 2022 |
| Bluethorn Developments Limited | Real estate | 2005 |
| Bluewater Assets Limited | Other services | 2004 |
| Bluewater Estates Northwest Limited | Real estate | 2021 |
| Bluewharf Developments Limited | Real estate | 2006 |
| Blur Limited | Wholesale & retail | 2021 |
| Blur London Limited | Extraterritorial | 2023 |
| Blush and Blade Ltd | Other services | 2021 |
| Blush and Blade Training Academy Ltd | Education | 2022 |
| Blyth Ventures Ltd | Real estate | 2017 |
| Blyxon Limited | Information & communication | 2021 |
| BM Commerce Group Limited | Wholesale & retail | 2025 |
| BM Interprises Classic Ltd | Wholesale & retail | 2025 |
| BM Repairs Ltd | Wholesale & retail | 2015 |
| Bm&Ir Chauffeur Limited | Transport & logistics | 2023 |
| BM25 Holdings Ltd | Real estate | 2025 |
| BMA Distribution Ltd | Wholesale & retail | 2025 |
| Bmac Total Health and Catering Service Ltd | Hospitality | 2023 |
| BMC Cars Ltd | Wholesale & retail | 2019 |
| BMC Property Management Ltd | Real estate | 2021 |
| BMD Build Ltd | Construction | 2009 |
| BMD Construction Ltd | Construction | 2007 |
| BMG Cost Consultants Limited | Professional & scientific | 2017 |
| BMG Property Management Ltd | Households | 2024 |
| Bmll Limited | Financial services | 2022 |
| Bmlza Properties Limited | Real estate | 2021 |
| BMS Recycle Limited | Wholesale & retail | 2015 |
| BMS Sublimation Limited | Wholesale & retail | 2020 |
| BNJ Developments Ltd | Construction | 2023 |
| Bo-Kay's Ltd | Wholesale & retail | 2025 |
| Boar Ltd | Wholesale & retail | 2023 |
| Boardman James Productions Ltd | Arts & recreation | 2001 |
| Boardy Ltd | Wholesale & retail | 2024 |
| BOB Horsefield Limited | Construction | 2014 |
| Bobamigo Limited | Wholesale & retail | 2023 |
| Bobbles by Paul Limited | Other services | 2019 |
| Bobby's Home Ltd | Hospitality | 2025 |
| Bobeeza Properties Limited | Real estate | 2025 |
| Bocoum&Co Ltd | Transport & logistics | 2025 |
| Bodega Carpets and Flooring Ltd | Construction | 2022 |
| Bodhi Bespoke Limited | Manufacturing | 2025 |
| Bodhi Creative Limited | Professional & scientific | 2026 |
| Bodhi Property Holdings Limited | Real estate | 2021 |
| Bodhi Residential Limited | Real estate | 2024 |
| Bodhi Solutions Limited | Professional & scientific | 2020 |
| Bodywise Skin Clinic Limited | Administrative & support | 2003 |
| Bodyworx Gym Ltd | Arts & recreation | 2016 |
| Boels Ltd | Education | 2024 |
| Boiler Check Limited | Other services | 2013 |
| Boiler Control Services Limited | Manufacturing | 2014 |
| Boiler Spares (N.W.) Limited | Wholesale & retail | 1962 |
| Boilerwizz Limited | Construction | 2020 |
| Bolburn Ltd | Real estate | 2019 |
| Bold Academy Limited | Administrative & support | 2014 |
| Bold Homes Ltd | Real estate | 2018 |