| Belvedere Place Management Company NO.1 Limited | Households | 2000 |
| Belvedere RTM Company Limited | Households | 2015 |
| BEN Davis Photography Ltd | Professional & scientific | 2026 |
| BEN Hayden Music Ltd | Information & communication | 2018 |
| BEN Leach Specialist Decorators Limited | Construction | 2018 |
| BEN Penfold Coaching Limited | Education | 2020 |
| BEN Pulford Architect Limited | Professional & scientific | 2012 |
| BEN Stamp Holdings Limited | Financial services | 2026 |
| Benati Solution Limited | Construction | 2024 |
| BENBRAY2 Limited | Professional & scientific | 2012 |
| Benchmark Garden Furniture Limited | Administrative & support | 2003 |
| Benedetto Properties Ltd | Households | 2021 |
| Benedetto Restaurants Limited | Hospitality | 2006 |
| Benedict Leonard Ltd | Manufacturing | 2026 |
| Beneficial BIO Ltd | Professional & scientific | 2019 |
| Benficas Ltd | Health & social care | 2023 |
| Bengrove Management Limited | Households | 2021 |
| Benhernz Limited | Manufacturing | 2025 |
| Benjaminnovation Limited | Professional & scientific | 2020 |
| Benkaz Consulting Limited | Wholesale & retail | 2010 |
| Benlong Co., Limited | Manufacturing | 2018 |
| Bennett Court (Camberley) Residents Association Limited | Households | 1985 |
| Bennett Engineers Ltd | Manufacturing | 2023 |
| Bennett's Independent Lettings Ltd | Households | 2025 |
| Bennetts Intensive Driving Ltd | Education | 2003 |
| Benny’S Wine Merchants Ltd | Wholesale & retail | 2023 |
| Bensasson & Chalmers Limited | Information & communication | 1996 |
| Bentland Farms Limited | Agriculture & fishing | 1945 |
| Bentley Court Management Company (Four Marks) Limited | Households | 2017 |
| Bentley Mechanical Services Limited | Construction | 2004 |
| Bentley Smart Repairs Ltd | Manufacturing | 2021 |
| Beny Trimming Ltd | Manufacturing | 2025 |
| Benzen Group Limited | Manufacturing | 2015 |
| Bepeima Ltd | Manufacturing | 2023 |
| Berdard Valves Group Co., Ltd | Extraterritorial | 2017 |
| Bereajoy Limited | Wholesale & retail | 2022 |
| Bereks Intelligent Control Technology Co., Ltd | Extraterritorial | 2021 |
| Bergbridge Limited | Information & communication | 2008 |
| Beri Open Systems C.I.C. | Professional & scientific | 2013 |
| Bermoe Limited | Wholesale & retail | 2025 |
| Bernard Dixon & Partners Limited | Professional & scientific | 1960 |
| Bernhardt Medical Services Ltd | Health & social care | 2015 |
| Berny.Michal Ltd | Manufacturing | 2025 |
| Berry & Aubergine Limited | Wholesale & retail | 2024 |
| Berry Good Homes Limited | Real estate | 2023 |
| Berry Management Company Limited | Households | 2021 |
| Berrycroft Stores Limited | Wholesale & retail | 1952 |
| Berrylands Residents Company (Cambridge) Limited | Households | 1970 |
| Berrywood Close Management Company Limited | Households | 2006 |
| Besedu Ltd | Education | 2026 |
| Besna Ltd | Real estate | 2025 |
| Bespoke Electrical Installations & Design Ltd | Construction | 2021 |
| Bespoke Projects Ltd | Information & communication | 2007 |
| Bessemer Services Ltd | Professional & scientific | 2025 |
| Best Advice Investments Limited | Financial services | 1989 |
| Best Corporation Limited | Construction | 2008 |
| Best Diamond Kebab Limited | Hospitality | 2023 |
| Best Firewood UK Ltd | Wholesale & retail | 2012 |
| Best Pure (UK) International Limited | Wholesale & retail | 2022 |
| Best Source Co., Ltd | Extraterritorial | 2025 |
| BEST4BUSINESS Limited | Professional & scientific | 2006 |
| Bestar Co., Ltd | Agriculture & fishing | 2024 |
| Bestar Products Co., Ltd | Wholesale & retail | 2018 |
| Bestco Chemical Cooperation Ltd | Extraterritorial | 2019 |
| Bestech Knives Ltd | Extraterritorial | 2022 |
| Bestie Beastie Supplies Ltd | Wholesale & retail | 2022 |
| Bestlet Anglia Limited | Real estate | 2000 |
| Bestop Technology Limited | Extraterritorial | 2020 |
| Besturn Industry Co., Ltd | Extraterritorial | 2015 |
| Betacog Innovations Ltd | Information & communication | 2024 |
| Beth Shalom Reform Synagogue | Other services | 2010 |
| Bethan Manley Ltd | Professional & scientific | 2022 |
| Bethans Beauty Shop Limited | Other services | 2003 |
| Bethel Enterprises Limited | Wholesale & retail | 2001 |
| Betpad Limited | Wholesale & retail | 2023 |
| Better Buy (H.K) Co., Limited | Extraterritorial | 2018 |
| Better Home Care Ltd | Health & social care | 2013 |
| Better Living Property Limited | Real estate | 2020 |
| Betterbody ME Ltd | Other services | 2021 |
| Betterware Home Products Co., Ltd | Extraterritorial | 2014 |
| Bettysmw Ltd | Manufacturing | 2024 |
| Bewes Limited | Real estate | 2016 |
| Beyond Education International Ltd | Education | 2024 |
| Beyond Medicine Ltd | Health & social care | 2021 |
| Beyond Routine Limited | Information & communication | 2025 |
| Beyond the Word Marketing Ltd | Professional & scientific | 2023 |
| BFG Heating Limited | Construction | 2021 |
| Bfitwright Limited | Other services | 2024 |
| BGC Smart Screen Co., Ltd | Manufacturing | 2025 |
| BGD Birkwood Limited | Professional & scientific | 2025 |
| BGS Collective Ltd | Real estate | 2024 |
| BH Innovations Ltd. | Professional & scientific | 2019 |
| Bhagwat Group UK Limited | Wholesale & retail | 2024 |
| Bhangra BUS Cafe Ltd | Hospitality | 2014 |
| Bhavani Food Limited | Hospitality | 2024 |
| Bhavishya Shakti Global Limited | Wholesale & retail | 2023 |
| Bhavna Propco Limited | Real estate | 2023 |
| BHD Enterprise Ltd | Professional & scientific | 2016 |
| BHE Altair Ltd | Real estate | 2021 |
| BHE Betelgeuse Ltd | Real estate | 2021 |