| Bushfired Ltd | Wholesale & retail | 2026 |
| Bushgrove (Manchester) Limited | Extraterritorial | 2024 |
| Bushlee Limited | Professional & scientific | 2011 |
| Business 4 Northenden (2020) Limited | Administrative & support | 2020 |
| Business About YOU Ltd | Extraterritorial | 2025 |
| Business Advantage Partnership Limited | Professional & scientific | 2012 |
| Business Advice Service Limited | Professional & scientific | 2004 |
| Business Advisory and Solutions Ltd | Information & communication | 2020 |
| Business Ahead Ltd | Information & communication | 2018 |
| Business Alchemy Training Limited | Education | 2021 |
| Business Assist Accountants Ltd. | Professional & scientific | 2021 |
| Business Born Limited | Professional & scientific | 2025 |
| Business Centre Limited | Real estate | 2025 |
| Business Centre Plus Limited | Real estate | 2023 |
| Business Chameleon Ltd | Professional & scientific | 2009 |
| Business Choices Limited | Financial services | 2003 |
| Business Coaching NW Ltd | Professional & scientific | 2025 |
| Business Communications and Services Group Limited | Information & communication | 2022 |
| Business Compass for Trade and Investment Ltd | Wholesale & retail | 2021 |
| Business Consultancy (NW) Ltd | Administrative & support | 2014 |
| Business Consultant Clinic Ltd | Professional & scientific | 2020 |
| Business Data and Mobile Solutions Limited | Administrative & support | 2008 |
| Business Development Consultancy Solutions Ltd | Professional & scientific | 2010 |
| Business Development House Ltd | Professional & scientific | 2015 |
| Business Development House Norway Ltd | Administrative & support | 2015 |
| Business Development Services (Preston) Ltd | Professional & scientific | 2006 |
| Business E VIA Italy Limited | Administrative & support | 2009 |
| Business Edge (Europe) Limited | Professional & scientific | 2004 |
| Business Efficient Limited | Real estate | 2024 |
| Business Energy Solutions & Marketing Ltd | Information & communication | 2024 |
| Business Energy UK Online Limited | Energy | 2025 |
| Business English Online Ltd | Education | 2022 |
| Business Exiting Solutions Ltd | Professional & scientific | 2025 |
| Business in Box Ltd | Wholesale & retail | 2013 |
| Business Information Technology Solutions Ltd | Information & communication | 2025 |
| Business Intelligence Analytics Ltd | Professional & scientific | 2020 |
| Business Intermediation Ltd. | Wholesale & retail | 2019 |
| Business Klarity Ltd | Professional & scientific | 2026 |
| Business Marketing Consultants Limited | Professional & scientific | 2015 |
| Business of Law Global Ltd | Professional & scientific | 2021 |
| Business Opportunity Watch Limited | Information & communication | 2007 |
| Business Point Ltd | Wholesale & retail | 2022 |
| Business Powerpack Limited | Professional & scientific | 2009 |
| Business Requirements & Solutions Limited | Professional & scientific | 2015 |
| Business Search Online Ltd | Professional & scientific | 2016 |
| Business Service Solution BSS Ltd | Administrative & support | 2018 |
| Business Solutions Dotcom Ltd | Transport & logistics | 2019 |
| Business Support MA Limited | Professional & scientific | 2022 |
| Business Technology Research Limited | Administrative & support | 2019 |
| Business Trust Solutions Ltd | Wholesale & retail | 2018 |
| Business Utility Hub Limited | Administrative & support | 2015 |
| Business Vehicle Rentals Limited | Administrative & support | 2002 |
| Business Venture Capital Ltd | Real estate | 2013 |
| Business Waste Services Ltd | Water & waste | 2025 |
| Business Wellbeing Expert Limited | Professional & scientific | 2024 |
| Business World INT UK Limited | Real estate | 2021 |
| Business World International Limited | Wholesale & retail | 2009 |
| Business-Angels-Innovations Limited | Health & social care | 2018 |
| Business-Gas-Electric Limited | Wholesale & retail | 2017 |
| Businessaid Southern Limited | Professional & scientific | 2018 |
| Businessway (UK) Limited | Extraterritorial | 2002 |
| Businesswise Accountants Ltd. | Professional & scientific | 2020 |
| Busk Properties Ltd | Construction | 2023 |
| Busketi Ventures Limited | Wholesale & retail | 2013 |
| Buslane Community Interest Company | Transport & logistics | 2025 |
| Busnify Ltd | Professional & scientific | 2023 |
| Busolami's Heritage Limited | Health & social care | 2022 |
| Busreisen International Ltd | Extraterritorial | 2016 |
| Bussin Burger Ltd | Hospitality | 2024 |
| Bussybodevents Limited | Other services | 2025 |
| Bust 2023 Ltd | Real estate | 2020 |
| Bustan Private Ltd | Wholesale & retail | 2024 |
| Busy Bean Accounting Limited | Professional & scientific | 2023 |
| Busy Bean Bookkeepers Limited | Professional & scientific | 2023 |
| Busy BEE Cleaning Services Ltd | Administrative & support | 2025 |
| Busy BEE Coffee Ltd | Hospitality | 2023 |
| Busy BEE Commercial Finance Limited | Financial services | 2020 |
| Busy BEE Construction Solutions Ltd | Construction | 2019 |
| Busy BEE Flooring Limited | Construction | 2023 |
| Busy Corporation Limited | Wholesale & retail | 1999 |
| Busyecom Ltd | Wholesale & retail | 2023 |
| Butacare Limited | Health & social care | 2014 |
| Butikk by Osma Ltd | Wholesale & retail | 2026 |
| Butlamb Health Ltd | Health & social care | 2017 |
| Butler & Rose Jewellers Ltd | Wholesale & retail | 2020 |
| Butler Building Services (NW) Ltd | Construction | 2019 |
| Butler Credit & Control Limited | Administrative & support | 2025 |
| Butt & Co. Ltd | Wholesale & retail | 2026 |
| Butt Cars Limited | Wholesale & retail | 2023 |
| Butt Goods Ltd | Wholesale & retail | 2026 |
| Butt Goods Trading Ltd | Wholesale & retail | 2022 |
| Butt Hyde ORG Ltd | Hospitality | 2026 |
| Butt ISA Propeties Ltd | Real estate | 2026 |
| Butt Motor Longsight Ltd | Wholesale & retail | 2023 |
| Butt S Enterprises Ltd | Wholesale & retail | 2022 |
| Butter Communication London Limited | Information & communication | 2025 |
| Butter CUT Social Club Ltd | Wholesale & retail | 2023 |
| Butter Oils and Herbs Ltd | Manufacturing | 2026 |
| Buttercup Bakery & Kitchen Limited | Hospitality | 2025 |
| Butterfield Architecture Limited | Professional & scientific | 2008 |