| Beju Limited | Wholesale & retail | 2016 |
| Bekes Transport Ltd | Transport & logistics | 2023 |
| Bekrem Limited | Health & social care | 2020 |
| Bela DE Limited | Health & social care | 2021 |
| Belair Coffee Systems Limited | Wholesale & retail | 2009 |
| Belal & Son's Investment Ltd | Real estate | 2023 |
| Belatozor Ltd | Transport & logistics | 2025 |
| Belgent Holdings Ltd | Information & communication | 2019 |
| Belgravia Investments International Limited | Administrative & support | 2015 |
| Belhati Consulting Services Limited | Information & communication | 2020 |
| Belistore Ltd | Hospitality | 2011 |
| Bell Bevg Ltd | Hospitality | 2024 |
| Bell System (Telephones) Limited | Manufacturing | 1971 |
| Belle Lily Beauty Ltd | Other services | 2025 |
| Bellereve Residential Limited | Hospitality | 2024 |
| Bellmont Ltd. | Information & communication | 2024 |
| Bello Collective Properties Ltd | Real estate | 2025 |
| Bello's Square Limited | Health & social care | 2023 |
| Bellsbrook Limited | Real estate | 2006 |
| Bellsie Limited | Administrative & support | 2019 |
| Bellway Whitehouse Farm Management Company Limited | Households | 2016 |
| Belman Engineering Limited | Manufacturing | 2017 |
| Belman Technologies Limited | Manufacturing | 2020 |
| Belmont Energy Technologies Ltd | Professional & scientific | 2024 |
| Belmont Stays Limited | Real estate | 2025 |
| Belos Asset Management Company Limited | Wholesale & retail | 2026 |
| Belper Associates Limited | Administrative & support | 2017 |
| Belt & Braces Finance Limited | Information & communication | 2007 |
| Belvedere Benefits Ltd | Wholesale & retail | 2026 |
| Belvedere Enterprises Ltd | Real estate | 2017 |
| Belvedere Recruitment Ltd | Professional & scientific | 2018 |
| BEN Aigen Strategy Support Limited | Professional & scientific | 2022 |
| BEN Jackson Business Advisory Ltd | Professional & scientific | 2023 |
| BEN Read Photography Ltd | Professional & scientific | 2019 |
| BEN Roworth Coaching Ltd | Arts & recreation | 2025 |
| Bench Electrical Contractor Limited | Construction | 2026 |
| Benchmark Architects Ltd | Professional & scientific | 2016 |
| Benchmark Bespoke Homes Ltd | Professional & scientific | 2021 |
| Bend the BOW Ltd | Information & communication | 2003 |
| Bending Spaces Limited | Information & communication | 2026 |
| Benedek X Limited | Construction | 2018 |
| Bengys Cleaning Ltd | Administrative & support | 2024 |
| Benie Reeds Consulting Ltd | Professional & scientific | 2024 |
| Benisoft Limited | Information & communication | 2023 |
| Benison Properties Ltd | Real estate | 2023 |
| Benison Trading Group Ltd | Wholesale & retail | 2023 |
| Benissima Ltd | Wholesale & retail | 2024 |
| Benita Beauty Ltd | Other services | 2015 |
| Benjafield Construction Ltd | Construction | 2026 |
| Benjamin Alexander Designs Ltd | Professional & scientific | 2018 |
| Bennett Maintenance Ltd | Other services | 2025 |
| Bennetts Family Furnishings Limited | Wholesale & retail | 2002 |
| Benny Carwash Ltd | Other services | 2019 |
| Bensalah Enterprises Ltd | Real estate | 2024 |
| Bensley Property Services Ltd | Construction | 2019 |
| Benthill Management Company Limited | Households | 2026 |
| Bentley Brear Limited | Financial services | 2002 |
| Berclo Ltd | Administrative & support | 2014 |
| Berecroft 2009 Limited | Professional & scientific | 2009 |
| Berger Restaurants Limited | Hospitality | 2012 |
| Bergland Stevens Limited | Real estate | 2002 |
| Bergman & Beving Invest Ltd | Financial services | 2025 |
| Berica Court (Barkingside) Management Co. Limited | Households | 2002 |
| Berkeley Morgan Healthcare Limited | Extraterritorial | 1994 |
| Berkeley Morgan Property Limited | Extraterritorial | 1998 |
| Berkhamsted Tool Hire Limited | Wholesale & retail | 1972 |
| Berkleigh Electrical Services Ltd | Construction | 2014 |
| Berkshire Gynaecology Limited | Health & social care | 2011 |
| Berkshire Rooms Ltd | Real estate | 2002 |
| Bernard & Family Limited | Transport & logistics | 2012 |
| Bernardo & Son's Ltd | Energy | 2020 |
| Bernie Brown Collections Ltd | Wholesale & retail | 2023 |
| Berry Health Ltd | Information & communication | 2021 |
| Berry Hill Enterprises Ltd | Real estate | 2025 |
| Berserker Studio Limited | Wholesale & retail | 2025 |
| Berts Medical Limited | Health & social care | 2010 |
| Berwin Ltd | Administrative & support | 2024 |
| BES MK Property Limited | Real estate | 2017 |
| Besnal Property Limited | Real estate | 2023 |
| Bespoke Boating Solutions Ltd | Real estate | 2012 |
| Bespoke British Boxes Limited | Manufacturing | 2014 |
| Bespoke Building Projects Limited | Construction | 2019 |
| Bespoke Car Buyer Ltd | Extraterritorial | 2024 |
| Bespoke Carpentry Contracts Ltd | Manufacturing | 2017 |
| Bespoke Creations MK Ltd | Other services | 2025 |
| Bespoke Estate Maintenance Ltd | Other services | 2023 |
| Bespoke Facilities Solutions Limited | Administrative & support | 2015 |
| Bespoke Personal Home Care Ltd | Health & social care | 2025 |
| Bespoke PR Limited | Other services | 2025 |
| Bespoke Project Construction Limited | Construction | 2023 |
| Bespoke Repairs Ltd | Construction | 2016 |
| Bespoke Support MK Ltd | Health & social care | 2018 |
| Bespoke VIP Ltd | Wholesale & retail | 2018 |
| Bespoke Workforce Limited | Administrative & support | 2024 |
| Bessemer Lodge Ltd | Households | 2024 |
| Best Brands 4 YOU Ltd | Wholesale & retail | 2015 |
| Best Build Properties Ltd | Construction | 2025 |
| Best Diet Limited | Health & social care | 2022 |
| Best Electrical Services Limited | Construction | 2004 |
| Best Elite Solutions Ltd | Wholesale & retail | 2024 |