| Beaconsfield Estate Agents Limited | Real estate | 2002 |
| Beaconsfield Family Holdings Ltd | Financial services | 2025 |
| Beaconsfield Festival of Choirs | Arts & recreation | 2014 |
| Beaconsfield Golf Club Limited(The) | Arts & recreation | 1948 |
| Beaconsfield Health Consultancy Ltd | Administrative & support | 2022 |
| Beaconsfield High School | Education | 2013 |
| Beaconsfield High School Enterprises Limited | Hospitality | 2014 |
| Beaconsfield Land and Property Limited | Real estate | 2005 |
| Beaconsfield Masonic Centre Limited | Arts & recreation | 1985 |
| Beaconsfield Residents Environmental Action Group Limited | Transport & logistics | 2026 |
| Beaconsfield Residents Park Lane Group Limited | Transport & logistics | 2026 |
| Beaconsfield RFC Trading and Supporters Club Limited | Hospitality | 2018 |
| Beaconsfield Rugby Football Club Limited | Arts & recreation | 1971 |
| Beaconsfield School | Education | 2012 |
| Beaconsfield Taxi Services Limited | Transport & logistics | 2022 |
| Beaconsfield Tennis Centre Limited | Arts & recreation | 2015 |
| Beaconsfield Town Football Club Limited | Arts & recreation | 1998 |
| Beadmans LLP | | 2007 |
| Beam Survey Global Limited | Mining & quarrying | 2025 |
| Beasar Limited | Professional & scientific | 2010 |
| Beauty & the Boutique Limited | Wholesale & retail | 2011 |
| Beauty Advisory Limited | Wholesale & retail | 2014 |
| Beech Lodge Properties Limited | Construction | 2014 |
| Beech Lodge School Limited | Education | 2012 |
| Beech Lodge School Services Limited | Education | 2011 |
| Beechwood Recruitment International Limited | Professional & scientific | 1989 |
| Beeskneesphotos Ltd | Information & communication | 2017 |
| Belle Epoque Charters Ltd | Administrative & support | 1994 |
| Bellforce Developments Limited | Construction | 2000 |
| Bellforce Propco Limited | Financial services | 2026 |
| Bellridge Place Management Company Limited | Households | 2003 |
| Bellwether Finance Limited | Financial services | 2020 |
| Bemaca Ltd | Hospitality | 2020 |
| BEN Tyers Limited | Arts & recreation | 2013 |
| Benedict & Co Ltd | Hospitality | 2012 |
| Benedict Wright Consulting Limited | Professional & scientific | 2016 |
| Bennett Holmes LLP | | 2003 |
| Bennett Servo Hydraulic Limited | Professional & scientific | 2003 |
| Bensar Property Rentals Ltd | Real estate | 2021 |
| Benson Garage Limited | Wholesale & retail | 2010 |
| Benston Building Contracts Limited | Construction | 2007 |
| Berry Real Estate Limited | Real estate | 2015 |
| Bespoke Home Services Limited | Wholesale & retail | 2006 |
| Bespoke Wealth Solutions Limited | Financial services | 2013 |
| Betteraskdan Ltd | Construction | 2021 |
| BFW Property Ltd | Real estate | 2021 |
| Bgsp Ltd | Information & communication | 2005 |
| BH Recycling Limited | Water & waste | 2017 |
| Biasbuster Ltd | Information & communication | 2024 |
| Bibbs Hall Management Limited | Households | 2024 |
| BID to Buy Limited | Real estate | 2020 |
| Big Easy Birmingham Limited | Hospitality | 2025 |
| Big Easy Bluewater Limited | Hospitality | 2020 |
| Big Easy Restaurant Holdings Limited | Hospitality | 2026 |
| Big Easy Restaurants Limited | Hospitality | 1993 |
| Big Easy Westfield (Stratford) Limited | Hospitality | 2020 |
| Big GUN Digital Limited | Information & communication | 2010 |
| Bill Plant Mobility Group Limited | Wholesale & retail | 2024 |
| Bilstrong Limited | Manufacturing | 2023 |
| Bintaro Limited | Professional & scientific | 2018 |
| Biomass Heating Supplies Limited | Agriculture & fishing | 2014 |
| Bionic Productions Limited | Extraterritorial | 2012 |
| Biopharm Services Limited | Professional & scientific | 1998 |
| Birchwood House Development Ltd | Construction | 2025 |
| Birdfeed Inc Limited | Information & communication | 1999 |
| Bishops Court (Bedfont) Residents Management Company Limited | Households | 2004 |
| Bjerregaard Holdings Limited | Financial services | 2021 |
| Black Flower Social Ltd | Hospitality | 2025 |
| Black Rock Property Company Limited | Real estate | 2002 |
| Blackstoke Limited | Hospitality | 2021 |
| Bledington Developments Limited | Construction | 2024 |
| Bloodhound Capital Limited | Professional & scientific | 2010 |
| Bloom Investments Ltd | Wholesale & retail | 2020 |
| Blue Chip Beaconsfield Limited | Real estate | 1987 |
| Blue Dragon Yard Management Company Limited | Households | 2009 |
| Blue Lighthouse Consulting Limited | Professional & scientific | 2014 |
| Blue Martini Group Limited | Arts & recreation | 2014 |
| Blue Pear Group Ltd | Hospitality | 2025 |
| Blue Sheep Business Services Limited | Administrative & support | 2024 |
| Bluedogz Ltd | Real estate | 2019 |
| Blumah Ltd | Wholesale & retail | 2025 |
| BM Promotional Leisure Limited | Arts & recreation | 2014 |
| Bmas Digital Consulting Limited | Information & communication | 2019 |
| Body Health Fitness Holdings Limited | Financial services | 2025 |
| Body Health Fitness Langley Ltd | Arts & recreation | 2025 |
| Body Health Padel Club Ltd | Arts & recreation | 2026 |
| Body-Health Fitness Ltd | Arts & recreation | 2019 |
| Boell Consulting Ltd. | Professional & scientific | 2015 |
| Bondsgate Limited | Real estate | 2018 |
| Bone Machine Films Ltd | Information & communication | 2010 |
| Bonne Bouche Property Limited | Real estate | 2026 |
| Booth Commercial Services Limited | Professional & scientific | 2022 |
| Born to BE VIP Ltd | Professional & scientific | 2013 |
| Boston Investment Management Group Limited | Financial services | 1971 |
| Boston Nominees Limited | Financial services | 1999 |
| Boulters Meadow Limited | Construction | 2012 |
| Boulters Riverside Community Interest Company | Professional & scientific | 2016 |
| Bourne END Management Company Limited | Administrative & support | 2004 |
| Bourne END Marina Limited | Real estate | 2003 |
| Bovingdons Estates Management Limited | Real estate | 2025 |