| BEC 4U Ltd | Transport & logistics | 2021 |
| Bech Properties Ltd | Real estate | 2019 |
| Beckingham Swim School Limited | Arts & recreation | 2021 |
| Beckside Pre-School & Nursery Ltd | Health & social care | 2021 |
| Beckside Property Limited | Real estate | 2022 |
| Bedford and Thompson Ltd. | Professional & scientific | 2008 |
| Bedrock Land Limited | Financial services | 2026 |
| Beecrofts Toys Limited | Wholesale & retail | 1946 |
| Beedee Developments Ltd | Real estate | 2017 |
| Beefield Investments Limited | Financial services | 2023 |
| Beeiit Ltd | Information & communication | 2020 |
| Beepalace Teams Ltd | Manufacturing | 2025 |
| Beese & Myers Ltd | Professional & scientific | 2016 |
| Beeshirt Ltd | Wholesale & retail | 2018 |
| Behold Events Ltd | Professional & scientific | 2022 |
| Beinarovics Costruct Ltd | Construction | 2022 |
| Beinn Bhuidhe Energy Limited | Energy | 2009 |
| Belcadd Ltd | Wholesale & retail | 2024 |
| Belcher Datoo Investments Ltd | Administrative & support | 2025 |
| Belgravia Homes (Lincoln) Limited | Real estate | 2019 |
| Bell First AID Training Limited | Professional & scientific | 2010 |
| Bell Janney Ltd | Real estate | 2025 |
| Bell Logistics Ltd | Transport & logistics | 2025 |
| Bell Ventures Ltd. | Other services | 2017 |
| Bella DI Casa Limited | Hospitality | 2024 |
| Bella Homes for YOU Ltd | Real estate | 2025 |
| Bella Luci Ltd | Transport & logistics | 2025 |
| Bella Madre Property Ltd | Real estate | 2022 |
| Bella Trading Unlimited | Wholesale & retail | 2018 |
| Bellamme Bridal Limited | Wholesale & retail | 2025 |
| Bellamy Tanning Group Limited | Other services | 2024 |
| Bellcastle B&S Ltd | Hospitality | 2025 |
| Bellcastle Events Ltd | Hospitality | 2024 |
| Bellcastle Hospitality Ltd | Hospitality | 2022 |
| Belleflower Limited | Transport & logistics | 2026 |
| Bellis Properties Ltd | Real estate | 2018 |
| Bellmech Ltd | Construction | 2020 |
| Bellz Properties Ltd | Real estate | 2026 |
| Belsize GAS Company Ltd | Health & social care | 2015 |
| Belton & Jones Ltd | Professional & scientific | 2011 |
| Belvin Construction Limited | Construction | 2016 |
| BEN Energy Electrical Services Ltd | Construction | 2022 |
| BEN Linnecor Drylining & Plastering Ltd | Construction | 2017 |
| BEN Martin Project Management Ltd | Professional & scientific | 2024 |
| BEN Stockbridge Plastering Ltd | Construction | 2022 |
| BEN Thompson EDU Ltd | Education | 2021 |
| BEN Wilson Plastering Ltd | Construction | 2019 |
| Ben's School of Motoring Limited | Education | 2009 |
| Benbridge Close Management Limited | Households | 2022 |
| Benjamin a Moore Decorating Limited | Construction | 2024 |
| Benjamin Harrison Ltd | Transport & logistics | 2024 |
| Benn Otobocare Services Limited | Health & social care | 2019 |
| Bennett & Co Studio Ltd | Manufacturing | 2024 |
| Bentley Properties (Lincs) Ltd | Real estate | 2025 |
| Beowa Group Ltd | Extraterritorial | 2022 |
| Beresford Holdings Limited | Wholesale & retail | 2016 |
| Beresford Plastering Services Limited | Construction | 2002 |
| Bergmann Direct Holdings Limited | Financial services | 2008 |
| Bergmann Direct Limited | Wholesale & retail | 1988 |
| Berkeley Court (Sleaford) Management Company Limited | Households | 2020 |
| Berry Luxe Properties Ltd | Hospitality | 2022 |
| Berry Shireel Paving Limited | Construction | 2025 |
| Bertone Industries Ltd | Hospitality | 2020 |
| Besa Developments Ltd | Construction | 2019 |
| Besa Environmental Ltd | Professional & scientific | 2019 |
| Besa Property Services Ltd | Administrative & support | 2010 |
| Beshh Enterprises Limited | Real estate | 2021 |
| Bespoke Engineering & Risk Management Solutions Ltd | Information & communication | 2026 |
| Bespoke Landscaping Ltd | Administrative & support | 2025 |
| Bespoke Medals Ltd | Extraterritorial | 2022 |
| Bespoke Sports Medals Ltd | Extraterritorial | 2022 |
| Bespoke Training Services UK Limited | Education | 2005 |
| Besstruck Ltd | Transport & logistics | 2016 |
| Best at Matcha Ltd | Wholesale & retail | 2025 |
| Best Finish Chef Ltd | Hospitality | 2020 |
| Best Metal Bearings Ltd | Wholesale & retail | 2024 |
| Best Price Energy Plan Ltd | Other services | 2025 |
| Best Tender Care Ltd | Health & social care | 2024 |
| Bestons Barber Shop Ltd | Other services | 2024 |
| Beth Tyson Enterprises Limited | Real estate | 2021 |
| Bethefirst Ltd | Administrative & support | 2012 |
| Betsys Medical Services Ltd | Health & social care | 2023 |
| Betweenparents Limited | Information & communication | 2026 |
| Bevanall Ltd | Information & communication | 2014 |
| Bevans Investments Ltd | Real estate | 2020 |
| Beyond Engineering Services Limited | Professional & scientific | 2022 |
| Beyond Limits Project Ltd | Wholesale & retail | 2020 |
| Beyond the File Ltd | Public administration | 2025 |
| Beyond Type Limited | Information & communication | 2023 |
| BG (Lincoln) Limited | Administrative & support | 1990 |
| BG 2006 Ltd | Hospitality | 2024 |
| BG Football Limited | Arts & recreation | 2026 |
| BGC Medical Limited | Health & social care | 2016 |
| Bhealth Ltd | Health & social care | 2012 |
| Bhiuk Limited | Wholesale & retail | 2013 |
| BIA Constuction Limited | Construction | 2014 |
| Bicep Limited | Extraterritorial | 2004 |
| Bick Orthopaedics Limited | Health & social care | 2021 |
| Bickerton ENT Limited | Health & social care | 2013 |
| Biers Urology Ltd | Health & social care | 2021 |