| Badain Limited | Professional & scientific | 2022 |
| Badar Ecom Solutions Ltd | Wholesale & retail | 2025 |
| Badenna Ltd | Construction | 2024 |
| Badger & Squirrel Ltd | Hospitality | 2023 |
| Badger Abodes Limited | Real estate | 2021 |
| Badger Developments Ltd | Construction | 2023 |
| Badger Electrical Ltd | Extraterritorial | 2021 |
| Badger Fruit Limited | Wholesale & retail | 2019 |
| Badger Racing Limited | Arts & recreation | 2009 |
| Badgers Holt Limited | Households | 2002 |
| Badgworth Arena Limited | Other services | 2025 |
| Badgworth Court Residents' Management Company Limited | Households | 2001 |
| Badgworth Limited | Real estate | 2003 |
| Badminton Enterprises Limited | Real estate | 2015 |
| Badminton Property Limited | Professional & scientific | 2007 |
| Badminton School International Limited | Education | 2019 |
| Badminton School Limited | Education | 1931 |
| BAE EOT Limited | Financial services | 2021 |
| Baems Events Limited | Health & social care | 2017 |
| Baems Fleet Limited | Health & social care | 2017 |
| Baems Medical Limited | Health & social care | 2017 |
| Baems Training Limited | Health & social care | 2017 |
| Baffled Azimuth Ltd | Administrative & support | 2021 |
| BAG & Bale Limited | Wholesale & retail | 2001 |
| Bagaras Ltd | Hospitality | 2025 |
| Bagelry Box Limited | Hospitality | 2022 |
| Bagha Homes Ltd | Real estate | 2025 |
| Baghali Ltd | Real estate | 2021 |
| Baghdadi Engineering Limited | Professional & scientific | 2013 |
| Baglan Moor Healthcare Holdings Limited | Professional & scientific | 1999 |
| Baglan Moor Healthcare PLC | Health & social care | 1999 |
| Bagna Limited | Hospitality | 2025 |
| Bagsdirect (Wholesale) Limited | Wholesale & retail | 2006 |
| BAH Management Ltd | Real estate | 2011 |
| Baham Solar Ltd | Energy | 2020 |
| Bahraini Scent Limited | Wholesale & retail | 2025 |
| Baile NA Gringa Ltd | Administrative & support | 2025 |
| Bailey Access Ltd | Education | 2019 |
| Bailey Associates Limited | Professional & scientific | 2012 |
| Bailey Balloons Limited | Arts & recreation | 2003 |
| Bailey Caravans Limited | Manufacturing | 1939 |
| Bailey Dean Limited | Professional & scientific | 2022 |
| Bailey Estate Holding Ltd | Real estate | 2021 |
| Bailey Group Holdings Limited | Manufacturing | 2018 |
| Bailey Lynas Limited | Professional & scientific | 2015 |
| Bailey&Co (Interior Design) Ltd | Professional & scientific | 2021 |
| Bailey's Caribbean Kitchen Limited | Hospitality | 2024 |
| Baileys Veterinary Services Limited | Professional & scientific | 2019 |
| Bailey’S Appointments Ltd | Real estate | 2022 |
| Baillie Reynolds Maintenance Limited | Construction | 2019 |
| Bailmaj Racing Ltd | Manufacturing | 1992 |
| Baily Court Management Company Limited | Extraterritorial | 2024 |
| Bainary Ltd | Professional & scientific | 2024 |
| Baines Drejer Ltd | Financial services | 2021 |
| Bains Property Ltd | Real estate | 1995 |
| Bainton Engineering Limited | Professional & scientific | 2013 |
| Bajc Services Ltd | Other services | 2026 |
| BAK Management Ltd | Financial services | 2022 |
| Bake Away Bristol Ltd | Hospitality | 2019 |
| Bake Boss Academy Ltd | Information & communication | 2025 |
| Bake Labb Ltd | Hospitality | 2025 |
| Bakealicious GR Ltd | Hospitality | 2021 |
| Bakealicious Wine Street Ltd | Hospitality | 2026 |
| Baked Communications Ltd | Professional & scientific | 2025 |
| Bakehouse Management (Coalpit Heath) Limited | Real estate | 2009 |
| Baker Builds Ltd | Construction | 2012 |
| Baker Capital Management Limited | Real estate | 2021 |
| Baker Cleaning Services Ltd | Administrative & support | 2025 |
| Baker Consulting Ltd | Extraterritorial | 2018 |
| Baker Group Ltd | Extraterritorial | 2003 |
| Baker Hughes Energy Technology UK Limited | Administrative & support | 1980 |
| Baker IT Ltd | Information & communication | 2003 |
| Baker Kearns Consulting Ltd | Professional & scientific | 2009 |
| Baker Orthopaedics Ltd | Health & social care | 2013 |
| Baker Preschool Holdings Limited | Financial services | 2021 |
| Baker Street Nursery and Preschool Limited | Education | 1994 |
| Baker White Property Limited | Real estate | 2020 |
| Bakerhayes Maintenance Limited | Construction | 2015 |
| Bakerhayes Properties Ltd | Construction | 2018 |
| Bakerlou Music Ltd | Information & communication | 2014 |
| Bakerreed Properties Ltd | Real estate | 2005 |
| Bakers Accountancy Limited | Real estate | 2012 |
| Bakers of Nailsea Limited | Wholesale & retail | 1991 |
| Bakers Pipeline Water & Drainage Ltd | Construction | 2019 |
| Bakes Supplies Ltd | Wholesale & retail | 2026 |
| Bakesmiths Limited | Hospitality | 2016 |
| Bakewell Investments Limited | Real estate | 2024 |
| Bakewell Limited | Financial services | 2021 |
| Baki Property Limited | Real estate | 2021 |
| Bakrania Family Estate Limited | Real estate | 2024 |
| Bakston LP | | 2014 |
| BAL Catering UK Ltd | Hospitality | 2025 |
| BAL Floor Screeding Limited | Construction | 2009 |
| Balaclava Buildings Ltd | Real estate | 2023 |
| Balakim Property Ltd | Real estate | 2025 |
| Balan Express Limited | Transport & logistics | 2021 |
| Balance Book- Keeping Limited | Professional & scientific | 2004 |
| Balance Dental Ltd | Health & social care | 2026 |
| Balance FS Ltd | Other services | 2022 |
| Balance of Wellness Limited | Health & social care | 2018 |