| Bacho 007 Limited | Transport & logistics | 2018 |
| Badger Health & Safety Limited | Public administration | 2012 |
| Baker Properties NW Limited | Real estate | 2024 |
| Balance Energy 11 Ltd | Construction | 2021 |
| Balance Energy 12 Ltd | Construction | 2021 |
| Balance Energy 14 Ltd | Construction | 2021 |
| Balance Energy 15 Ltd | Construction | 2021 |
| Balance Energy 16 Ltd | Construction | 2021 |
| Balance Energy 17 Ltd | Construction | 2021 |
| Balance Energy 18 Ltd | Construction | 2022 |
| Balance Energy 19 Ltd | Construction | 2022 |
| Balance Energy 20 Ltd | Construction | 2022 |
| Balance Energy 21 Ltd | Construction | 2022 |
| Balance Energy 22 Ltd | Construction | 2022 |
| Balance Energy 23 Ltd | Construction | 2020 |
| Balance Energy 24 Ltd | Construction | 2020 |
| Balance Energy 25 Ltd | Construction | 2020 |
| Balance Energy 4 Ltd | Construction | 2020 |
| Balance Energy 5 Ltd | Construction | 2020 |
| Balance Energy 6 Ltd | Construction | 2020 |
| Balance Energy 8 Ltd | Construction | 2021 |
| Balance Energy 9 Ltd | Construction | 2021 |
| Balance Estates Limited | Real estate | 2017 |
| Balance Power Projects Limited | Construction | 2017 |
| Balance Solutions 1 Ltd | Energy | 2022 |
| Balanced Creations Ltd | Professional & scientific | 2023 |
| Balanced Earth Homes Ltd | Construction | 2017 |
| Banff Avenue Limited | Health & social care | 2019 |
| Banks Welding Services Ltd | Construction | 2012 |
| Banter Management Limited | Real estate | 1996 |
| Bar 87 Ltd | Hospitality | 2019 |
| Bar Consultancy Services Ltd | Professional & scientific | 2019 |
| Barbara Heyes Land Improvement Limited | Agriculture & fishing | 1995 |
| Bargutti Limited | Health & social care | 2019 |
| Barnes Electronics, Security and Telecommunications Limited | Construction | 1984 |
| Baron Estates (Europe) Limited | Real estate | 1992 |
| Barruko Limited | Information & communication | 2023 |
| Barry Pharma Limited | Wholesale & retail | 2023 |
| BAS International Approved Limited | Education | 2020 |
| Base Metal Concentrates Analysis Ltd | Professional & scientific | 2020 |
| Bash Burger Ltd | Hospitality | 2025 |
| Bate & Holland Funeral Services Limited | Other services | 2017 |
| Bauer Kompressoren UK Limited | Manufacturing | 1977 |
| Bawde Facilities Management Ltd | Administrative & support | 2025 |
| BAZ Services Limited | Wholesale & retail | 2021 |
| Bazfix Construction Ltd | Construction | 2018 |
| BC Group(Uk) Ltd | Other services | 2017 |
| BCD Pro Clean Ltd | Administrative & support | 2025 |
| BCL Floors UK Limited | Construction | 2023 |
| BCS Warrington Ltd | Administrative & support | 2022 |
| BE More Academy Ltd | Wholesale & retail | 2025 |
| Beab Transport Limited | Transport & logistics | 2026 |
| Bear Homes Ltd | Real estate | 2020 |
| Bearmont Holdings Ltd | Real estate | 2019 |
| Beau's Brews Cafè Limited | Hospitality | 2025 |
| Beauty by Christie Limited | Other services | 2019 |
| Beauty by Helen French Limited | Other services | 2012 |
| Beauty Independent Limited | Wholesale & retail | 2018 |
| Beauty Masters Academy Ltd | Education | 2025 |
| Beauty Standards Organisation Ltd | Education | 2023 |
| Beautylious Ltd | Other services | 2026 |
| Beechside Residential Care Home Limited | Health & social care | 1988 |
| Beeunique Mobility Ltd | Wholesale & retail | 2025 |
| Bella Property NW Ltd | Real estate | 2018 |
| Bella Roma ST Helens Ltd | Hospitality | 2025 |
| Bellizzi Coffee Company Limited | Extraterritorial | 2009 |
| BEM Cleaning Ltd | Administrative & support | 2024 |
| Bendek & Williamson Ltd | Wholesale & retail | 2022 |
| Bengus Holdings Limited | Real estate | 2025 |
| Berkon Sound Ltd | Information & communication | 2025 |
| Bern Commercial Services Limited | Other services | 2024 |
| Bernie Hott Ltd | Wholesale & retail | 2025 |
| Berrington Wood Ltd | Real estate | 2022 |
| Berry Electrical Solutions Ltd | Construction | 2025 |
| Berry's Lane Storage Ltd | Transport & logistics | 2025 |
| Berrys Heating Ltd | Construction | 2015 |
| Besmart Business Consultum and Training Services Limited | Administrative & support | 2021 |
| Bespoke Bar Manufacturers UK Ltd | Manufacturing | 2019 |
| Besso Brand Limited | Wholesale & retail | 2026 |
| Best Care Liverpool Limited | Health & social care | 2018 |
| Best CUT Barber Ltd | Other services | 2025 |
| Best Fit Mortgages Ltd | Financial services | 2024 |
| Bestfor Buying Ltd | Wholesale & retail | 2011 |
| Bestone UP Limited | Wholesale & retail | 2020 |
| Betws Property Co Ltd | Real estate | 2025 |
| Beyond the Fringe Salons Limited | Other services | 2017 |
| BGR Private Limited | Hospitality | 2025 |
| Biala Investments Limited | Real estate | 2023 |
| Bickerstaffe Property Rentals Ltd | Real estate | 2022 |
| Big BEN Logistics Ltd | Hospitality | 2024 |
| Big Longborough Farm Ltd | Agriculture & fishing | 2023 |
| Big Property Management Ltd | Real estate | 2026 |
| Big TIM Construction Limited | Other services | 2017 |
| Bikesyoulike Limited | Wholesale & retail | 2009 |
| Billinge Home Improvements Limited | Construction | 2017 |
| Billy-Jo Trans Limited | Transport & logistics | 2014 |
| Binary Operations Ltd | Information & communication | 2024 |
| Biomass Fuel Supplies Ltd | Extraterritorial | 2014 |
| Biotherm Group Limited | Extraterritorial | 2024 |
| Birch Decor Ltd | Construction | 2020 |