| Bateman Group Ltd | Wholesale & retail | 2018 |
| Bateman Homes Ltd | Real estate | 2026 |
| Battleaxe Events Ltd | Arts & recreation | 2024 |
| Battleaxe Ltd | Arts & recreation | 2018 |
| Batts Engineering & Fabrications Limited | Manufacturing | 2000 |
| Bauer Equipment UK Limited | Manufacturing | 2007 |
| Bavura Limited | Health & social care | 2024 |
| Bawtry Audiology Limited | Wholesale & retail | 2025 |
| Baxter Signal Engineering Ltd | Construction | 2022 |
| Bay Tree Bistro Ltd | Hospitality | 2016 |
| Bayliss Properties Limited | Hospitality | 2006 |
| Bazillion Club Ltd | Real estate | 2021 |
| Bazusoft Ltd | Information & communication | 2018 |
| BB Properties (South Yorkshire) Ltd | Real estate | 2025 |
| BB Rigging Solutions Limited | Information & communication | 2022 |
| Bbconsulting (South Yorkshire) Ltd | Professional & scientific | 2025 |
| Bbflo Ltd | Transport & logistics | 2026 |
| BC Dwellings Ltd | Real estate | 2023 |
| BC International Ltd | Professional & scientific | 2021 |
| BCD Plumbing & Heating Ltd | Construction | 2025 |
| BD Portfolio Limited | Real estate | 2021 |
| BDF Consultancy Ltd | Information & communication | 2022 |
| BDL Cladding Services Ltd | Construction | 2024 |
| BE Fast-Shop Ltd | Wholesale & retail | 2023 |
| BE Lower Limited | Extraterritorial | 2018 |
| BE More Learning and Development Limited | Professional & scientific | 2024 |
| BE One Labels Ltd | Manufacturing | 2021 |
| BE Warm UK Ltd | Construction | 2026 |
| Be-Safe Solutions Ltd | Administrative & support | 2024 |
| Beaa Ltd | Information & communication | 2022 |
| Beam Project Management Services Ltd | Professional & scientific | 2024 |
| Bean Creative House Ltd | Arts & recreation | 2026 |
| Bear Face Branding Co Limited | Manufacturing | 2025 |
| Bear GRP Ltd | Construction | 2023 |
| Beardsall & Hulbert Investments Limited | Real estate | 2017 |
| Beardsall Estates Limited | Real estate | 2018 |
| Beardsall Management Limited | Real estate | 2022 |
| Bearing King Ltd. | Wholesale & retail | 2006 |
| BEARNA27 Consultancy Ltd | Information & communication | 2021 |
| Beast Broadband Ltd | Information & communication | 2021 |
| Beatson Clark Limited | Manufacturing | 1910 |
| Beaumontiquesracing Ltd | Arts & recreation | 2024 |
| Beauty Barks Ltd | Other services | 2019 |
| Beauty Lovables Ltd | Wholesale & retail | 2015 |
| Beautyb Ltd | Other services | 2025 |
| Becc Associates Ltd | Professional & scientific | 2021 |
| Beck Scaffolding Services Ltd | Construction | 2025 |
| Beckley Estates Ltd | Real estate | 2024 |
| Becky Bakery Ltd | Manufacturing | 2025 |
| BED Store Direct Ltd | Wholesale & retail | 2021 |
| Bedtime One Limited | Wholesale & retail | 2007 |
| BEE Fade Supper CUT Limited | Other services | 2025 |
| BEE Kwik Scaffold Services Ltd | Construction | 2008 |
| BEE Viral Ltd | Professional & scientific | 2025 |
| Beech Cliffe Limited | Health & social care | 2000 |
| Beech Damp-Proofing & Timber Treatments Ltd | Other services | 2021 |
| Beech Property Partnership LLP | | 2020 |
| Beechville Properties Ltd | Real estate | 2021 |
| Beechwood Care Home Limited | Health & social care | 2025 |
| Beecroft & Partners Limited | Wholesale & retail | 1986 |
| Beelogic-Uk Ltd | Transport & logistics | 2024 |
| Beer & Cheer Ltd | Hospitality | 2019 |
| Beerpig Limited | Hospitality | 2022 |
| Beharis Tours and Travels Limited | Administrative & support | 2025 |
| Beharis Travel Limited | Administrative & support | 2022 |
| Beighton Management Associates Limited | Real estate | 1993 |
| Beighton Motors RG Ltd | Wholesale & retail | 2021 |
| Beit Alshami Ltd | Real estate | 2024 |
| Belford Corporate (UK) Limited | Administrative & support | 2021 |
| Belike Ltd | Financial services | 2016 |
| Belingua Limited | Professional & scientific | 2014 |
| Bella HOG Limited | Hospitality | 2008 |
| Bella Nails & Beauty Limited | Other services | 2016 |
| Bella Pizza 2024 Ltd | Hospitality | 2024 |
| Bella Serv Limited | Administrative & support | 2024 |
| Bellana Investments Ltd | Real estate | 2026 |
| Bellaro Properties Limited | Real estate | 2025 |
| Belle & Bright Ltd | Administrative & support | 2025 |
| Bellezza Ltd | Health & social care | 2019 |
| Bellissimi Ltd | Manufacturing | 2019 |
| Belong Inclusion Services Ltd | Education | 2026 |
| Belvedere Properties Lettings Ltd | Real estate | 2020 |
| Belyaan Holdings Ltd | Financial services | 2026 |
| BEN Bennett JR Limited | Mining & quarrying | 1925 |
| BEN Bennett JR Properties Limited | Real estate | 2020 |
| Ben's Pizza Limited | Hospitality | 2016 |
| Benevent Ltd | Information & communication | 2024 |
| Benjamin Redzia Watch Repairs Ltd | Other services | 2017 |
| Benjamin Wild Hair Limited | Other services | 2019 |
| Benncode Limited | Information & communication | 2023 |
| Bennett and Wilson Property Holdings Ltd | Real estate | 2025 |
| BENNY2011 Ltd | Transport & logistics | 2025 |
| Bens Rams Builders Limited | Construction | 2020 |
| Benthall Grange (Ironbridge) Management Company Limited | Households | 2022 |
| Bentham Developments Limited | Real estate | 2012 |
| Bentharley Stud and Sports Horses Ltd | Other services | 2022 |
| Benz Group UK Ltd | Real estate | 2023 |
| Benz Property Services UK Ltd | Real estate | 2022 |
| Bereco Group Limited | Administrative & support | 2005 |
| Bereco Limited | Administrative & support | 2003 |