| Baytree Development Company Limited | Construction | 1987 |
| Bazinga Ltd | Extraterritorial | 2012 |
| BC UW Ltd | Financial services | 2012 |
| BCD Properties LLP | | 2005 |
| Bchw Consultant Ltd | Professional & scientific | 2023 |
| Bcis Holdings Limited | Financial services | 2022 |
| BCL Yorkshire Limited | Professional & scientific | 2020 |
| BCP Electrics Limited | Construction | 2012 |
| BCS Developments Limited | Construction | 2006 |
| BD Capital Management Limited | Real estate | 2023 |
| BD Solid Fuels Limited | Wholesale & retail | 2017 |
| BDB Group Ltd | Financial services | 2017 |
| Bdrck Ltd | Wholesale & retail | 2025 |
| BDS Structural Design Services Limited | Professional & scientific | 2009 |
| BE Dyslexia Ltd | Education | 2023 |
| BE Fit Infusion Ltd | Health & social care | 2025 |
| BE the Best Communications Limited | Professional & scientific | 2018 |
| BE the Dream Ltd | Professional & scientific | 2024 |
| Bean & BUD Ltd | Hospitality | 2023 |
| Beardmore Construction Ltd | Construction | 2006 |
| Bearmade Ltd | Wholesale & retail | 2015 |
| Beau Maison Ltd | Construction | 2018 |
| Beau Rentals and Renovations Ltd | Real estate | 2019 |
| Beaucare Group Limited | Financial services | 2007 |
| Beaucare Medical Limited | Wholesale & retail | 2000 |
| Beaumont House Properties Limited | Real estate | 2006 |
| Beaumont Vehicle Solutions Ltd | Wholesale & retail | 2022 |
| Beaumonts of Harrogate Limited | Real estate | 2008 |
| Beautiful Media Limited | Professional & scientific | 2013 |
| Beautiful Recruitment LLP | | 2010 |
| Beauty Boutique of Pateley Bridge Ltd | Other services | 2013 |
| Beaux & Reves Limited | Wholesale & retail | 2021 |
| BEC Investments Limited | Financial services | 2020 |
| Becketts Accountants Limited | Professional & scientific | 2017 |
| Beckside Garth Residents Management Company Ltd | Households | 2026 |
| Become a Journey CIC | Health & social care | 2025 |
| Beds Glasgow Contracts Limited | Wholesale & retail | 2018 |
| Beds Glasgow Limited | Wholesale & retail | 2015 |
| Beds Paisley Limited | Administrative & support | 2017 |
| Beds Shawlands Limited | Wholesale & retail | 2020 |
| Beds West END Limited | Wholesale & retail | 2021 |
| Bedtime Limited | Extraterritorial | 2011 |
| BEE Bridal Ltd | Wholesale & retail | 2021 |
| BEE Events Limited | Arts & recreation | 2018 |
| Beech House Management (Harrogate) Limited | Extraterritorial | 2006 |
| Beeck (UK) Ltd | Wholesale & retail | 2020 |
| Beef Curry Ltd | Extraterritorial | 2012 |
| Beehive and Blossom Ltd | Hospitality | 2016 |
| Beehive Folding Partitions Limited | Construction | 2003 |
| Behroz Ltd | Administrative & support | 2017 |
| Bekelek Limited | Professional & scientific | 1990 |
| Beknic Limited | Professional & scientific | 2024 |
| Beldon Assets Ltd | Construction | 2018 |
| Belford Road Property Company Limited | Real estate | 2018 |
| Belfort Group Limited | Extraterritorial | 2026 |
| Belgravia Jewellers Limited | Manufacturing | 2024 |
| Believers Healthcare Ltd | Administrative & support | 2018 |
| Bell Wise Limited | Other services | 2024 |
| Bella Booth Properties Ltd | Real estate | 2023 |
| Bella Domus Limited | Financial services | 2025 |
| Bellbird Estates Ltd | Real estate | 2022 |
| Bellbright Limited | Professional & scientific | 2003 |
| Belle VUE Healthcare Limited | Real estate | 1995 |
| Belle VUE Mills Limited | Real estate | 2009 |
| Belle VUE Mills Management Company Limited | Real estate | 2010 |
| Bellerby Developments Ltd | Construction | 2025 |
| Bellezza Dentro Limited | Other services | 2018 |
| Bellopera Limited | Information & communication | 2018 |
| Belmont House Development Limited | Real estate | 2020 |
| Belmont-Birklands School Trust Limited | Education | 1969 |
| Belrow Hill Ltd | Construction | 2024 |
| Belsfield Court Management Company Limited | Hospitality | 1968 |
| Belvoir Harrogate Limited | Real estate | 2017 |
| Bemba Services Limited | Construction | 2011 |
| Bemi (Leeds) Limited | Construction | 2019 |
| BEN Marles Ltd | Information & communication | 2026 |
| BEN Weiss Ltd | Information & communication | 2021 |
| Benbac Developments Limited | Real estate | 2012 |
| Benbarbers Harrogate Ltd | Other services | 2024 |
| Benchmark Education Ltd | Education | 2023 |
| Benchmark Systems Ltd | Professional & scientific | 2004 |
| Benjamin Fitzgerald Film Ltd | Information & communication | 2023 |
| Benjamin Tootill Ltd | Professional & scientific | 2019 |
| Bennett Christmas Insurance Brokers Ltd | Financial services | 2005 |
| Benson Saint-Clair Limited | Extraterritorial | 2025 |
| Bentley Cattle Co. Ltd | Agriculture & fishing | 2021 |
| Bentley Farm Holdings Limited | Financial services | 2024 |
| Beobacht Limited | Administrative & support | 2019 |
| BERN1E Ltd | Extraterritorial | 2021 |
| Berneray Hospitality LLP | | 2011 |
| Berona House Long Residential Leasehold Limited | Households | 2015 |
| Berry & Marshall (Bolton Wood) Limited | Mining & quarrying | 1956 |
| Berry Investment Holdings Limited | Financial services | 2017 |
| BERT1E Ltd | Extraterritorial | 2026 |
| Bertie Chesterton Limited | Extraterritorial | 2025 |
| Bertie Limited | Extraterritorial | 2025 |
| Beryllium Ltd | Extraterritorial | 2012 |
| Bespoke by Nature Interiors Ltd | Manufacturing | 2022 |
| Bespoke Developments (Harrogate) Limited | Construction | 2009 |
| Bespoke Mechanical Building Services Ltd | Construction | 2018 |