| Bearing North Ltd | Professional & scientific | 2025 |
| Beartown Dairies Ltd | Wholesale & retail | 2015 |
| Beartown Fitness Limited | Arts & recreation | 2010 |
| Beats Accountancy Ltd | Professional & scientific | 2022 |
| Beatus Limited | Public administration | 2023 |
| Beauthill Limited | Information & communication | 2025 |
| Beautyincuk Ltd | Other services | 2025 |
| Beautywave Products Limited | Wholesale & retail | 2021 |
| Becky Williams Consulting Ltd | Professional & scientific | 2021 |
| Becky’S Canine Club Ltd | Other services | 2023 |
| BED & Mattress Shop Limited | Wholesale & retail | 2019 |
| Bedgebury House Creative Consulting Ltd | Professional & scientific | 2024 |
| BEE Aesthetics and Wellness Ltd | Health & social care | 2026 |
| BEE Hoppy Properties Ltd | Real estate | 2024 |
| BEE Smart Education Ltd | Education | 2026 |
| BEE Van Limited | Transport & logistics | 2022 |
| Beech Consumer Services Limited | Administrative & support | 2010 |
| Beech Lane Developments Limited | Households | 2020 |
| Beech Lane Lettings Limited | Real estate | 2014 |
| Beech Tree Catering Limited | Hospitality | 2002 |
| Beechmount Antiques Limited | Wholesale & retail | 2023 |
| Beechmount Bookkeeping Limited | Professional & scientific | 2012 |
| Beecroft Consulting Limited | Extraterritorial | 2024 |
| Beefnberry Bistro Ltd | Hospitality | 2023 |
| Beehive Manchester Ltd | Construction | 2014 |
| Beehive Manchester Technical Services Limited | Construction | 2020 |
| Beeley's Bakery Limited | Real estate | 1984 |
| Beeproperty Management Ltd | Real estate | 2024 |
| Beespoke Wheels Ltd | Manufacturing | 2018 |
| Beevers Analysis and Insight Ltd | Administrative & support | 2023 |
| Bell Meadow Limited | Construction | 2003 |
| Bell Meadow Property Developments Limited Liability Partnership | | 2002 |
| Bell Meadow Property Holdings Limited | Construction | 2001 |
| Bellas Wash Limited | Other services | 2018 |
| Belle VUE Speedway 2017 Limited | Arts & recreation | 2017 |
| Bello London Imports Ltd | Wholesale & retail | 2018 |
| Bellzy Limited | Wholesale & retail | 2025 |
| Belux Travel Limited | Administrative & support | 2024 |
| Belvedere Court (Redhill) Management Limited | Administrative & support | 1999 |
| Belwell Grange (Sutton Coldfield) Management Company Limited | Households | 2009 |
| BEN Brown Camera Operator Limited | Information & communication | 2012 |
| BEN Johns Architects Limited | Professional & scientific | 2015 |
| BEN Lane Chef Services Ltd | Hospitality | 2019 |
| BEN Tutton Media Limited | Information & communication | 2022 |
| Benderas Ltd | Real estate | 2020 |
| Bengal Tiger Lily (NW) Ltd | Hospitality | 2025 |
| Bennetts Legal Services Ltd | Professional & scientific | 2021 |
| Benog Marketing Ltd | Professional & scientific | 2018 |
| Bentham Property Limited | Real estate | 2019 |
| Bentworth Holdings Limited | Financial services | 2018 |
| Benu Renewables Ltd | Construction | 2015 |
| Berkshire Moray Ltd | Professional & scientific | 2018 |
| Bespoke Home Projects Ltd | Construction | 2025 |
| Bespoke Kitchens and Furniture Ltd | Manufacturing | 2007 |
| Best Sponge Ltd | Wholesale & retail | 2026 |
| Bestamos Property Ltd | Real estate | 2023 |
| Beth Wise Recruitment Ltd | Administrative & support | 2022 |
| Bethan Hahn Communications Ltd | Professional & scientific | 2015 |
| Betteley Taxis Limited | Transport & logistics | 2003 |
| Better Dentures Ltd | Health & social care | 2017 |
| Better Search Limited | Information & communication | 2026 |
| Betterton Duplex Limited | Construction | 2015 |
| Betts Financial Services Limited | Financial services | 2025 |
| Beyond Consulting Ltd | Professional & scientific | 2015 |
| Beyond the Breeze Limited | Wholesale & retail | 2026 |
| BHR Clinic UK Ltd | Health & social care | 2020 |
| BIA Developments Ltd | Real estate | 2015 |
| Big Big Holdings Limited | Hospitality | 2023 |
| Big Day Merch Ltd | Wholesale & retail | 2020 |
| Big Deal Creative LLP | | 2011 |
| Big Tent Strategy Ltd | Professional & scientific | 2020 |
| Bigmoto Ltd | Wholesale & retail | 2024 |
| Bike Finance 247 Ltd | Wholesale & retail | 2021 |
| Bill Moore (Cash Betting) Limited | | 1969 |
| Billam Beattie Ltd | Transport & logistics | 2007 |
| Billbo (UK) Limited | Wholesale & retail | 1993 |
| Billington Farming Limited | Agriculture & fishing | 2013 |
| Bilton Health Consulting Ltd | Professional & scientific | 2021 |
| BIM Towers Ltd | Information & communication | 2024 |
| Binary Neon Engineering Ltd | Manufacturing | 2024 |
| Biniorella Ltd | Professional & scientific | 2021 |
| Binyar Ltd | Wholesale & retail | 2020 |
| Biocodex Limited | Administrative & support | 2024 |
| Biomarker Technologies (Bmkgene) UK Ltd | Professional & scientific | 2024 |
| Bioscript Group Limited | Financial services | 2015 |
| Bioscript Holdings Limited | Financial services | 2021 |
| Bioscript Limited | Financial services | 2021 |
| Bioscript Midco 1 Limited | Financial services | 2021 |
| Bioscript Midco 2 Limited | Financial services | 2021 |
| Bioscript Stirling Limited | Professional & scientific | 2002 |
| Biosect Limited | Manufacturing | 2024 |
| Biosecure ID Limited | Professional & scientific | 2024 |
| Bips Asset Management Limited | Real estate | 2019 |
| Birchfield Estates & Property Development Limited | Construction | 2007 |
| Birchfield Property Holdings Ltd | Real estate | 2017 |
| Birchwood Interiors Ltd | Construction | 2001 |
| Bird Therapeutic Services Limited | Health & social care | 2026 |
| Birkenhead Gymnastics Ltd | Arts & recreation | 2025 |
| Birtles Hall Estate Management Company Limited | Households | 2001 |
| Bistrohq Limited | Financial services | 2015 |