| Beaumont Nursing Home Limited | Health & social care | 2009 |
| Beautiful Bright Ltd | Information & communication | 2012 |
| Beautiful Corporations Ltd | Professional & scientific | 2013 |
| Beautiful Recordings Limited | Information & communication | 2021 |
| Beauty Banks | Health & social care | 2019 |
| Beauty Dinive Ltd | Other services | 2026 |
| Beauty Therapy Brighton Ltd | Other services | 2022 |
| Beccy Evans Ltd | Information & communication | 2016 |
| Beckbirk Estates Limited | Real estate | 2019 |
| Becket Collection Ltd. | Manufacturing | 2014 |
| Beckie Lemmens Limited | Agriculture & fishing | 2008 |
| Becky Crepsley-Fox Therapy Ltd | Health & social care | 2023 |
| Bedford Air Holdings Limited | Real estate | 2017 |
| Bedroom Activist Ltd | Information & communication | 2023 |
| Bedzz ARE US Limited | Wholesale & retail | 2018 |
| BEE BEE Limited | Professional & scientific | 2024 |
| BEE in the Woods Kindergarten Ltd | Education | 2018 |
| BEE Valley South East Limited | Agriculture & fishing | 2025 |
| Beeblebrox Ltd | Information & communication | 2025 |
| Beech Global Ltd | Real estate | 2019 |
| Beech View Holdings Ltd. | Administrative & support | 1996 |
| Beecham Plumbing Services Ltd | Construction | 2024 |
| Beechgood Limited | Wholesale & retail | 2015 |
| Beechy TV Limited | Administrative & support | 2007 |
| Beemovedsussex Ltd | Transport & logistics | 2025 |
| Beemunch Ltd | Administrative & support | 2014 |
| Beer and Meat Limited | Hospitality | 2012 |
| Beerbelly Ltd | Wholesale & retail | 2025 |
| Bees in the Wood TV Ltd | Information & communication | 2020 |
| Beetech Technology Ltd | Wholesale & retail | 2017 |
| Begonia Garden Ltd | Professional & scientific | 2020 |
| Begum Jaan Ltd | Wholesale & retail | 2018 |
| Behind the SET Ltd | Manufacturing | 2025 |
| Behold.Ai Technologies Limited | Information & communication | 2017 |
| Behrozz Ltd | Hospitality | 2025 |
| Beibuyuan Food UK Ltd | Hospitality | 2024 |
| Beija-Flor Projects Limited | Professional & scientific | 2024 |
| Being-With Collective Ltd | Health & social care | 2020 |
| Bejdo Company Ltd | Hospitality | 2022 |
| BEL Connections Ltd | Education | 2014 |
| Belbins Homes Ltd | Real estate | 2017 |
| Belbourne RTM Company Limited | Households | 2025 |
| Belgian Bites Ltd | Hospitality | 2026 |
| Belgian Chips BR Ltd | Hospitality | 2024 |
| Bell & FOX Design Limited | Wholesale & retail | 2016 |
| Bell Brand Communications Ltd | Financial services | 2019 |
| Bell Brand Communications Ownership Trust Limited | Administrative & support | 2023 |
| Bell Electrical Solutions Ltd | Construction | 2025 |
| Bell Harbour Ltd | Real estate | 2015 |
| Bell Heather Limited | Real estate | 2008 |
| Bell Tent Hire Company Limited | Hospitality | 2013 |
| Bella & Frank Limited | Wholesale & retail | 2014 |
| Bella K Ltd | Real estate | 2023 |
| Bella Renovations Ltd | Real estate | 2025 |
| Bella Union Artist Management Limited | Information & communication | 2004 |
| Bella Vista Management Limited | Households | 2005 |
| Bellamy Consultancy and Coaching Limited | Other services | 2015 |
| Bellamys (M & a) Limited | Manufacturing | 1943 |
| Bellavista Shutters & Blinds Ltd | Administrative & support | 2007 |
| Belle Creations Limited | Professional & scientific | 2020 |
| Belle VUE Court Freehold Company Limited | Households | 2015 |
| Bellerbys UK Limited | Education | 2001 |
| Bellerophon Capital Management Limited | Real estate | 2018 |
| Bellevue Court Limited | Households | 1997 |
| Bellissima Clinic London Ltd | Health & social care | 2020 |
| Bellows Equestrian Limited | Agriculture & fishing | 2020 |
| Belmont Court Dyke Road Limited | Households | 2012 |
| Belmont Global Ltd | Real estate | 2021 |
| Belmont House (ST. Aubyns) Limited | Households | 1996 |
| Belmont Thermal Limited | Construction | 2017 |
| Belmore Properties Limited | Real estate | 2008 |
| Belonging Effect Ltd | Education | 2025 |
| Belsize Mews (Residents) Limited | Households | 1985 |
| Belted Limited | Households | 1999 |
| Beltom Property Consulting Ltd | Construction | 2023 |
| Beltom Surveying Ltd | Construction | 2018 |
| Belton Close Management Limited | Households | 2003 |
| Belver Accounting and Business Services (Babs) Ltd | Professional & scientific | 2018 |
| BEN Alex Morris Limited | Information & communication | 2014 |
| BEN Bose Consulting Ltd | Professional & scientific | 2009 |
| BEN G Waller Photography Limited | Professional & scientific | 2026 |
| BEN Gladstone Ltd | Professional & scientific | 2015 |
| BEN Holdings Limited | Real estate | 2020 |
| BEN Macdonald Gardens Limited | Other services | 2012 |
| BEN Smith Consulting Ltd | Information & communication | 2017 |
| BEN Trousdell Garden Services Limited | Administrative & support | 2015 |
| Benenden Limited | Administrative & support | 1996 |
| Benerty Ltd | Hospitality | 2024 |
| Benez Property Ltd | Real estate | 2025 |
| Benjamin Allen Bespoke Homes Ltd | Construction | 2015 |
| Benjamin Allen Commercial Ltd | Construction | 2023 |
| Benjamin Hawkins Architecture Ltd | Professional & scientific | 2025 |
| Benjies at the Blacksmiths Arms Limited | Hospitality | 2018 |
| Benmed Technologies Limited | Information & communication | 2022 |
| Benn Carpentry and Construction Limited | Construction | 2025 |
| Bennet Property Limited | Real estate | 2019 |
| Bennett Wells Property Management Limited | Real estate | 2023 |
| Benoit Properties Ltd | Construction | 1999 |
| Bens MAN Van Hire & Removals Brighton Ltd | Transport & logistics | 2025 |
| Bento Consulting Limited | Professional & scientific | 2011 |