| Bluebox Logistics Ltd | Transport & logistics | 2020 |
| Bluechip Lodge Hotels Ltd | Extraterritorial | 2012 |
| Bluefire Creative Ltd | Information & communication | 2022 |
| Bluejae.Co.Uk Limited | Administrative & support | 2019 |
| Blueprint Consultant Services Limited | Professional & scientific | 2025 |
| Blueprometheus Ltd | Other services | 2014 |
| Bluesky Environmental Solutions Limited | Administrative & support | 2007 |
| Bluespark Cleaning Limited | Administrative & support | 2025 |
| Bluespot Construction Limited | Real estate | 2019 |
| Bluespot Group Limited | Information & communication | 2020 |
| Bluespot Holdings Limited | Financial services | 2020 |
| Bluespot IT Ltd | Information & communication | 2023 |
| Bluetiffin SRE Ltd | Hospitality | 2026 |
| Blurton Bites Ltd | Hospitality | 2021 |
| Blurton Bitez Ltd | Hospitality | 2023 |
| Blurton Reds FC CIC | Arts & recreation | 2018 |
| Bluu Square Developments Limited | Construction | 2019 |
| Bluu Square Projects Limited | Construction | 2019 |
| Blycad Ltd | Professional & scientific | 2018 |
| Blythe Bridge Nursery Group Limited | Education | 2024 |
| Blythe Building Consultants Countrywide Ltd | Professional & scientific | 2026 |
| Blythe Building Consultants Limited | Professional & scientific | 2002 |
| Blythe Welding Supplies Ltd | Wholesale & retail | 2025 |
| BM Bespoke Joinery Ltd | Manufacturing | 2023 |
| BM Bits and More Limited | Wholesale & retail | 2025 |
| BM Dynamic Ltd | Construction | 2023 |
| Bmbc Competitions Limited | Wholesale & retail | 2023 |
| BME Packaging Ltd | Wholesale & retail | 2008 |
| BMM Property Investments Ltd | Real estate | 2018 |
| BMS Foods Ltd | Wholesale & retail | 2023 |
| BMS Properties Limited | Real estate | 2020 |
| BMT Trading Ltd | Information & communication | 2020 |
| BNA Consultants Limited | Professional & scientific | 2014 |
| BNO Power Services Ltd. | Extraterritorial | 2018 |
| Boat Yard Holdings Limited | Professional & scientific | 2007 |
| BOB Collins Management Limited | Administrative & support | 2008 |
| BOB Hodgkiss Express Ltd | Transport & logistics | 2016 |
| Boban Transport Limited | Transport & logistics | 2019 |
| Bobbin Girl Ltd | Administrative & support | 2012 |
| Bobe Construction Ltd | Manufacturing | 2025 |
| Bobontiles Limited | Construction | 2025 |
| BOD Cafe Bars Ltd | Hospitality | 2019 |
| Bodhi Consultancy Ltd | Education | 2018 |
| Bodie Autos Ltd | Wholesale & retail | 2024 |
| Bodrum Shawarma Ltd | Hospitality | 2023 |
| Body & Hand Soaps (UK) Ltd | Manufacturing | 2023 |
| Body Repair and Painting Stoke-On Trent Professional Limited | Wholesale & retail | 2025 |
| Boee Holdings Limited | Financial services | 2023 |
| Bogdan Trans Ltd | Transport & logistics | 2017 |
| Boggling Ltd | Wholesale & retail | 2025 |
| Boholoco Limited | Wholesale & retail | 2020 |
| Bohsa Ltd | Education | 2015 |
| Boiler Hire UK Ltd | Construction | 2018 |
| Boing Boing Boing Limited | Arts & recreation | 2018 |
| Bojale Care Ltd | Health & social care | 2013 |
| Bojan Trans Ltd | Transport & logistics | 2019 |
| Boldnest Ltd | Wholesale & retail | 2025 |
| Boldstance Limited | Wholesale & retail | 2023 |
| Boldthreadz Ltd | Wholesale & retail | 2023 |
| Bolfodd Limited | Health & social care | 2021 |
| Bolling Investments Limited | Real estate | 1908 |
| Bologna Care UK Ltd | Transport & logistics | 2023 |
| Bolt Sameday Ltd | Transport & logistics | 2025 |
| Bolton Metals Group Ltd. | Professional & scientific | 1902 |
| Boltz Club Ltd | Hospitality | 2025 |
| BON Stoke Ltd | Hospitality | 2015 |
| Bonhams Services Limited | Administrative & support | 2016 |
| Bonus Market Ltd | Wholesale & retail | 2026 |
| Boons Transport (1986) Limited | Transport & logistics | 1986 |
| Boost Trans Expedition Ltd | Transport & logistics | 2018 |
| Bootleggers Store Ltd | Wholesale & retail | 2022 |
| Booty Brilliance Limited | Wholesale & retail | 2021 |
| Bora Consultancy Ltd | Professional & scientific | 2025 |
| Born for a Purpose Empowerment Centre CIC | Education | 2020 |
| Bosphorus Cheshire Limited | Hospitality | 2025 |
| Bosphorus Dining Limited | Hospitality | 2025 |
| Boston & Roberts Ltd | Real estate | 2024 |
| BOT Omega Ltd | Information & communication | 2026 |
| Bote Accountancy Ltd | Other services | 2015 |
| Bote Properties Ltd | Real estate | 2021 |
| Botheras (2014) Ltd | Financial services | 2014 |
| Bottlecraft Ltd | Wholesale & retail | 2014 |
| Boughey Properties Limited | Hospitality | 1984 |
| Boulton Estates Limited | Real estate | 2012 |
| Boundless Ltd | Information & communication | 2014 |
| Bourne Creative Limited | Arts & recreation | 2010 |
| Bowa Construction Limited | Construction | 2014 |
| Bowden Spring Limited | Manufacturing | 2025 |
| Bowers Group Holdings Limited | Financial services | 2026 |
| Bowland Consulting Limited | Professional & scientific | 2018 |
| Bowland Solutions Holdings Limited | Financial services | 2018 |
| Bowler Ventures Ltd | Financial services | 2024 |
| Bowwhite Properties Ltd | Real estate | 2020 |
| Box O FUN Ltd | Arts & recreation | 2020 |
| Boxing Updates Ltd | Professional & scientific | 2025 |
| Boydons Coaches Ltd | Transport & logistics | 2019 |
| BP Architecture Ltd | Professional & scientific | 2014 |
| BPC Services Cheshire Ltd | Information & communication | 2010 |
| BR Twin Pillars Properties Ltd | Real estate | 2025 |
| Brada Interiors Limited | Construction | 2022 |