| Beaver & Bungle Ltd | Information & communication | 2020 |
| Bebelane Ltd | Wholesale & retail | 2025 |
| Becalm FDN C.I.C. | Education | 2023 |
| Beckenham Regeneration Limited | Construction | 2021 |
| Beckingham Homes (Guildford) Ltd | Real estate | 2006 |
| Beckingham Place Management Company Limited | Administrative & support | 2005 |
| Beckingham Transport Limited | Transport & logistics | 2021 |
| Beckland Care Limited | Health & social care | 2015 |
| Beckley Electrical Ltd | Construction | 2019 |
| Becky Holland & Partners Limited | Professional & scientific | 2003 |
| BED Basics Ltd | Wholesale & retail | 2025 |
| Bedar Sons Ltd | Real estate | 2020 |
| Bedrock Bodyshop Ltd | Wholesale & retail | 2019 |
| Bedtime Ruislip Manor Limited | Wholesale & retail | 2011 |
| BEE Ventures Healthcare Ltd | Health & social care | 2023 |
| Bee-Utiful Bee-You Ltd | Other services | 2023 |
| Beech Court (Hurst) Management Company Limited | Real estate | 2007 |
| Beech Hill Management Company Limited | Households | 1998 |
| Beech Lane Dental Care Limited | Health & social care | 2012 |
| Beechcrest Management Company Limited | Households | 2016 |
| Beeches Solar Limited | Energy | 2015 |
| Beechmere Limited | Professional & scientific | 1993 |
| Beechwood Court Business Park Limited | Households | 2007 |
| Beechwood Management (2007) Company Limited | Households | 2007 |
| Beechwood Management Consultancy Limited | Professional & scientific | 2025 |
| Beechwood Mortgages Ltd | Financial services | 2006 |
| Beechwood Tree Care Limited | Agriculture & fishing | 1999 |
| Beeco Properties Limited | Real estate | 2020 |
| Beehive State Ltd | Real estate | 2020 |
| Beelineeplus Limited | Wholesale & retail | 2020 |
| Beemech Limited | Wholesale & retail | 2025 |
| Beenham Bodyshop Limited | Manufacturing | 2016 |
| Beenham Cars Limited | Wholesale & retail | 2026 |
| Beenham Garage Limited | Wholesale & retail | 2022 |
| Beenham MOT Centre Limited | Wholesale & retail | 2015 |
| Beenham Tyres Ltd | Wholesale & retail | 2021 |
| Beer Counter Packaging Ltd | Wholesale & retail | 2016 |
| Bees Audio Group Ltd | Professional & scientific | 2015 |
| Beeshees Buys Ltd | Wholesale & retail | 2025 |
| Beeson Holdings Limited | Financial services | 2024 |
| Beeson Solutions Limited | Professional & scientific | 2024 |
| Beetroot Labs Limited | Professional & scientific | 2018 |
| Beeybee Ltd | Wholesale & retail | 2022 |
| Before the Hammer Ltd | Information & communication | 2026 |
| Begin Living Ltd | Real estate | 2019 |
| Behaviour Analytics Limited | Professional & scientific | 2014 |
| Bekiaris Services Limited | Wholesale & retail | 2000 |
| Belal Trading Ltd | Wholesale & retail | 2018 |
| Belbury Financial Planning Limited | Financial services | 2009 |
| Belgravia Housing Management Company Limited | Households | 1981 |
| Belisarius Solutions Limited | Information & communication | 2011 |
| Bell & Bottle Proprietary Club Limited | Other services | 2026 |
| Bell & Bottle Public House Limited | Hospitality | 2022 |
| Bell Street Freehold Limited | Real estate | 2018 |
| Bell Thai Ltd | Hospitality | 2016 |
| Bell&Babz Limited | Other services | 2017 |
| Bella Breakfast Club Ltd | Hospitality | 2026 |
| Bella Vita Supply Chain Consultancy Ltd | Professional & scientific | 2024 |
| Bellair.Net Services Limited | Wholesale & retail | 2018 |
| Bellamy-Rosser Property Limited | Construction | 2019 |
| Bellatorad Limited | Health & social care | 2026 |
| Belldene Limited | Hospitality | 2025 |
| Belle Makeup & Hair Ltd | Arts & recreation | 2022 |
| Bellevue Electrical Ltd | Construction | 2023 |
| Bellman Court Management Company (Reading) Limited | Real estate | 1993 |
| Bells and Whistles Education Ltd | Education | 2019 |
| Bells and Whistles Events Ltd | Administrative & support | 2025 |
| Belmont House (Devon) Limited | Hospitality | 2000 |
| Belmont Medical Secretarial Services Ltd | Administrative & support | 2015 |
| Belmont Sport & Entertainment Ltd | Arts & recreation | 2024 |
| Belmour Ltd | Wholesale & retail | 2025 |
| Belnad Limited | Households | 1985 |
| Bembridge Residential and Management Limited | Households | 2020 |
| BEN James Limited | Information & communication | 2014 |
| BEN Khelifa Limited | Hospitality | 2025 |
| BEN Lovell Ltd | Information & communication | 2014 |
| BEN Robinson Limited | Real estate | 2019 |
| BEN Upston Scaffolding Ltd | Construction | 2024 |
| BEN Wheeler Hairdressing Ltd | Other services | 2019 |
| Ben-Motor and Allied Trades Benevolent Fund | Hospitality | 1987 |
| Benca Management Ltd | Professional & scientific | 2025 |
| Bench Building Ltd | Construction | 2020 |
| Benchmark Partnership Ltd. | Professional & scientific | 1999 |
| BENCHMARK-5 Properties Ltd | Real estate | 2020 |
| Bencon Healthcare Limited | Health & social care | 2019 |
| Bende Ltd | Information & communication | 2019 |
| Benebone Ltd | Professional & scientific | 2020 |
| Benedict Charles Financial Planning Ltd | Financial services | 2016 |
| Benfleet Business Management Services Limited | Professional & scientific | 2011 |
| Bengal Spice (Reading) Ltd | Hospitality | 2022 |
| Benington Group Ltd | Professional & scientific | 2017 |
| Benjamin Hill Designs Limited | Professional & scientific | 2016 |
| Benjamin James Roofing Ltd | Construction | 2013 |
| Benjamin Philip Investment Company Ltd | Financial services | 2025 |
| Bennett Brothers Estates Limited | Professional & scientific | 2022 |
| Bennett Financial Services Limited | Financial services | 2010 |
| Bennett HAY Limited | Administrative & support | 2009 |
| Bennetto Photography Ltd | Professional & scientific | 2016 |
| Bennetts Haulage Ltd | Transport & logistics | 2011 |
| Bennwinn Property Services Limited | Real estate | 2021 |