| Beautology Permanent Makeup Limited | Other services | 2015 |
| Beauty by Rebecca Nails Ltd | Other services | 2025 |
| Beauty by Rebecca Skin Ltd | Other services | 2025 |
| Beauvais Limited | Transport & logistics | 2026 |
| Becca Jane Ltd | Administrative & support | 2016 |
| Beckbury Green Ltd | Transport & logistics | 2019 |
| Becketwell LLP | | 2025 |
| Beckwood Limited | Wholesale & retail | 1989 |
| BED Connect Ltd | Wholesale & retail | 2019 |
| Bed.Al Ltd | Hospitality | 2025 |
| Bede House Property Management Company Limited | Real estate | 2002 |
| Bedford Mowing Services Limited | Agriculture & fishing | 2026 |
| Beds Plus 2020 Ltd | Wholesale & retail | 2020 |
| Bee-Fad Limited | Health & social care | 2015 |
| Beecham Properties Ltd | Real estate | 2018 |
| Beechfield LT Ltd | Professional & scientific | 2023 |
| Beechholme Management Limited | Real estate | 2006 |
| Beechwood Hair Studio Ltd | Other services | 2026 |
| Beechwood Psychology Ltd | Education | 2021 |
| Beel Interco Ltd. | Professional & scientific | 2014 |
| Beespoke Building Services Ltd | Construction | 2024 |
| Beez Smartcare Ltd | Health & social care | 2020 |
| Begin and Beyond Ltd | Professional & scientific | 2023 |
| Behr PR Limited | Professional & scientific | 2008 |
| Beitrad International Limited | Other services | 2020 |
| BEK Trans Ltd | Transport & logistics | 2017 |
| Belfresty Ltd | Wholesale & retail | 2021 |
| Belgravia 262828A Management Company Limited | Households | 2008 |
| Belgravia Financial Solutions Ltd | Professional & scientific | 2024 |
| Belindah Chaka Ltd | Professional & scientific | 2019 |
| Bellavista-Properties Limited | Administrative & support | 2007 |
| Belle Casa (Sheffield) Limited | Administrative & support | 2009 |
| Bellerophon Investments Limited | Financial services | 2019 |
| Bells Care Services Ltd | Administrative & support | 2023 |
| Belvedere Court Management (Outwood) Limited | Administrative & support | 2010 |
| Bemasd Ltd. | Professional & scientific | 2008 |
| Benberry Limited | Households | 2023 |
| Benchline Shopfitting Limited | Administrative & support | 2007 |
| Bendihomes Limited | Real estate | 2018 |
| Benecom Limited | Real estate | 2003 |
| Bengal Brasserie Drighlington Ltd | Hospitality | 2025 |
| Bengal Palace Ltd | Hospitality | 2023 |
| Bengal Tiger Lily (Alderley Edge) Ltd | Hospitality | 2018 |
| Bennetts Quality Butchers Ltd | Wholesale & retail | 2025 |
| Bennetts Roast House Ltd | Wholesale & retail | 2010 |
| Bennion & Sons Limited | Construction | 1999 |
| Benny Blackheart Hairdressing Limited | Other services | 2017 |
| Bennys Yorkshire Ltd | Hospitality | 2021 |
| Bentley Auto Repairs Ltd | Wholesale & retail | 2003 |
| Bentley Autos (Wakefield) Limited | Wholesale & retail | 2022 |
| Bentoshield Limited | Extraterritorial | 2015 |
| Beplan Ltd | Hospitality | 2024 |
| Berkeley DE Montfort Limited | Administrative & support | 2016 |
| Berner Germany Ltd. | Manufacturing | 2007 |
| Berry Air Conditioning Services Limited | Construction | 2014 |
| Beskan Services Limited | Administrative & support | 2020 |
| Bespoke Building Control Ltd. | Professional & scientific | 2006 |
| Bespoke Health & Fitness Limited | Arts & recreation | 2024 |
| Bespoke Photographic Services Limited | Professional & scientific | 2012 |
| Best Cutz (Wakefield) Ltd | Other services | 2023 |
| Best Move UK. Ltd | Real estate | 2023 |
| Best Prestige Limited | Wholesale & retail | 1999 |
| Best Rental Properties Limited | Real estate | 2019 |
| Best Solutions Cleaning Services Limited | Administrative & support | 2025 |
| Bestsolutionshealthcare Ltd | Public administration | 2019 |
| Better Bodies by Simon Burke Ltd | Arts & recreation | 2019 |
| Better Choice Healthcare Limited | Public administration | 2022 |
| Betterspot Limited | Construction | 1986 |
| Betty Loves Candles Limited | Wholesale & retail | 2018 |
| Beuley Holdings Ltd | Real estate | 2022 |
| Beveridge Social Ltd | Hospitality | 2025 |
| Beverley House (9000) Limited | Professional & scientific | 1963 |
| Beverley House Investments Limited | Financial services | 1990 |
| Beyond Facilities Ltd | Administrative & support | 2023 |
| Beyond Here CIC | Health & social care | 2026 |
| Beyond Linens Services Limited | Other services | 2018 |
| Beyond the Box Education Services Limited | Education | 2016 |
| Beyond the Letters Ltd | Health & social care | 2024 |
| Beyond Vapes Ltd | Wholesale & retail | 2025 |
| BFB Buero Fuer Baubiologie & Luftreinhaltung Ltd | Professional & scientific | 2006 |
| BFU Limited | Professional & scientific | 2005 |
| BG Plumbing & Heating Solutions Ltd | Construction | 2013 |
| BGU Limited | Information & communication | 2002 |
| BH Acquisitions Limited | Professional & scientific | 2011 |
| BH Autoworks Ltd | Wholesale & retail | 2022 |
| Bhardwaj Optical Limited | Health & social care | 2019 |
| BHR Recycling Limited | Wholesale & retail | 2021 |
| Bhutan Green Travel UK Ltd | Administrative & support | 2025 |
| BI6 Bite Limited | Hospitality | 2025 |
| Bicaku Ltd | Transport & logistics | 2022 |
| Biedronka Food Store Ltd | Wholesale & retail | 2021 |
| Big Dog Bakery Ltd | Manufacturing | 2018 |
| Big Mini Works Limited | Wholesale & retail | 2013 |
| Bigfellas Wakefield Limited | Hospitality | 2023 |
| Biggbytes Limited | Hospitality | 2022 |
| Bikely Ltd | Transport & logistics | 2025 |
| BIL Property Investment Ltd | Real estate | 2026 |
| Bilcon Projects Limited | Wholesale & retail | 1960 |
| Billets Limited | Real estate | 2016 |
| Billy Pearce Entertainment Limited | Arts & recreation | 2003 |