| Bitrobius Genetics Ltd | Professional & scientific | 2020 |
| Bivictrix Limited | Professional & scientific | 2016 |
| Bivictrix Therapeutics Limited | Professional & scientific | 2021 |
| BJS Consultancy Limited | Professional & scientific | 2023 |
| Bktv Ltd | Information & communication | 2025 |
| Black Box Brand Consultants Limited | Professional & scientific | 2003 |
| Black Dog Enterprises Limited | Professional & scientific | 2009 |
| Black Lane Car Wash Limited | Wholesale & retail | 2025 |
| Blackbrook (Warrington) Management Company Limited | Households | 2003 |
| Blackhurst Investments Limited | Financial services | 2012 |
| Blackley Properties Ltd | Real estate | 2024 |
| Blackshaws Market Place Limited | Hospitality | 2015 |
| Blackthorn Europe Limited | Wholesale & retail | 2025 |
| Blade Consultant Services Ltd | Manufacturing | 2020 |
| Blaikies Properties Ltd | Real estate | 2020 |
| Blair Drilling Limited | Water & waste | 2003 |
| Blakelow Consulting Limited | Professional & scientific | 2016 |
| Blancopan Consulting Services Limited | Information & communication | 2024 |
| Blaze Hill Consulting Limited | Professional & scientific | 2019 |
| Blaze Hill Digital Ltd | Information & communication | 2023 |
| Blaze Hill Limited | Information & communication | 2022 |
| Blenheim Asset Management Limited | Real estate | 2018 |
| Blizz Properties Ltd | Real estate | 2024 |
| BLL Nominee Ltd | Financial services | 2022 |
| Bloc Entertainment Ltd | Arts & recreation | 2024 |
| BLU Penguin Swim School Ltd | Education | 2024 |
| Blue Beck Ltd | Information & communication | 2008 |
| Blue Bird Realty Ltd | Real estate | 2015 |
| Blue Deer Homes Limited | Construction | 2010 |
| Blue Deer Limited | Construction | 1997 |
| Blue Deer VDL Limited | Real estate | 2007 |
| Blue Silver .VIP Hospitality Limited | Hospitality | 2025 |
| Blue Sky Yacht Charters Ltd | Administrative & support | 2024 |
| Blue Space Activities Limited | Arts & recreation | 2026 |
| Blue Sphere One Ltd | Wholesale & retail | 2009 |
| Blue Sphere Two Ltd | Real estate | 2022 |
| Blue Wave Studios Ltd | Arts & recreation | 2025 |
| Bluebell Mews RTM Company Limited | Households | 2011 |
| Bluebell Peak Limited | Professional & scientific | 2026 |
| Bluebells Property Management Limited | Households | 2014 |
| Blueberry Property Services Ltd | Real estate | 2021 |
| Blunt Media Limited | Arts & recreation | 1991 |
| Blyty Ltd | Wholesale & retail | 2020 |
| BML (Investments UK) Limited | Education | 2020 |
| Boadicea Ltd | Real estate | 2021 |
| Boar Estates Limited | Real estate | 2018 |
| Boardman Valeting Limited | Wholesale & retail | 2017 |
| Boardroom Consulting LLP | | 2019 |
| Boceto Limited | Construction | 2016 |
| Bodell Consulting Limited | Administrative & support | 2012 |
| Bodies in Action Limited | Arts & recreation | 2006 |
| Bodycote America Capital Limited | Financial services | 2019 |
| Bodycote America Finance Limited | Financial services | 2009 |
| Bodycote America Treasury Limited | Financial services | 2009 |
| Bodycote Developments Limited | Professional & scientific | 1935 |
| Bodycote Finance Limited | Administrative & support | 2007 |
| Bodycote Finance UK Limited | Professional & scientific | 2003 |
| Bodycote H.I.P. Limited | Manufacturing | 1976 |
| Bodycote Heat Treatments Limited | Manufacturing | 1971 |
| Bodycote HIP Germany Limited | Administrative & support | 2013 |
| Bodycote International Limited | Administrative & support | 1972 |
| Bodycote Investments | Professional & scientific | 2006 |
| Bodycote K-Tech Limited | Professional & scientific | 1992 |
| Bodycote Nominees NO. 1 Limited | Professional & scientific | 1993 |
| Bodycote Nominees NO. 2 Limited | Professional & scientific | 1948 |
| Bodycote Pension Trustees Limited | Financial services | 1988 |
| Bodycote PLC | Professional & scientific | 1953 |
| Bodycote Processing (Skelmersdale) Limited | Professional & scientific | 1970 |
| Bodycote Surface Technology Limited | Manufacturing | 1923 |
| Bodycote Thermal Processing Limited | Professional & scientific | 1976 |
| Bodycote Thermal Processing Mexico Limited | Manufacturing | 2006 |
| Bodyshop Alliance Group Ltd | Information & communication | 2015 |
| Boho Circle Ltd | Wholesale & retail | 2026 |
| Bohotel Limited | Hospitality | 2023 |
| Bohua SPV 1 Limited | Real estate | 2019 |
| Bojken Ltd | Construction | 2022 |
| Bollin Court Flat Management Company Limited | Households | 1995 |
| Bollin Dale Engineering Limited | Manufacturing | 1956 |
| Bollin Estate Limited | Real estate | 1933 |
| Bollin Holdings Limited | Professional & scientific | 2015 |
| Bollinbrook Limited | Education | 2016 |
| Bollington Beer Festival Ltd | Arts & recreation | 2026 |
| Bollington BIO Ltd | Wholesale & retail | 2026 |
| Bollington Boats and Bikes Ltd | Administrative & support | 2017 |
| Bollington Brewing Co. Limited | Manufacturing | 2008 |
| Bollington Building Company Ltd | Construction | 2022 |
| Bollington Classics Limited | Wholesale & retail | 2020 |
| Bollington Coffee Co. Ltd | Wholesale & retail | 2020 |
| Bollington Festival | Arts & recreation | 2003 |
| Bollington Health & Leisure | Arts & recreation | 2012 |
| Bollington Initiative Trust | Administrative & support | 2002 |
| Bollington Joinery Limited | Manufacturing | 2010 |
| Bollington Printshop Ltd | Manufacturing | 2018 |
| Bollington Skyline Ltd | Arts & recreation | 2022 |
| Bollington Taproom Ltd | Hospitality | 2013 |
| Bollington Tree Surgery and Fencing Ltd | Agriculture & fishing | 2025 |
| Bollington Village Store Ltd | Wholesale & retail | 2018 |
| Bollington Wharf Ltd | Transport & logistics | 2016 |
| Bollington Youth Group Community Interest Company | Education | 2024 |
| Bollinside Programming Services Ltd | Information & communication | 2018 |